Composition for protecting articles against corrosion and method for the same - Patents.com

Abstract

The present invention provides a composition for the protection of an article against corrosion, the composition comprising an amorphous polymer composition and a water-absorbing filler. The present invention further provides a tape comprising the composition of the present invention and an article comprising said tape or composition. The present invention also relates to a method for the protection of an article against corrosion.

Description

[Technical field]

[0001] 1. Technical field of the invention The present invention relates to the protection of articles against corrosion in dry, damp, wet, submerged or flooded environments, in particular oil or gas pipes or lines, and risers of oil drilling and production rigs and platforms.The present invention particularly relates to compositions for the protection of articles against corrosion.The present invention also relates to tapes and articles comprising the compositions of the present invention, and methods for the protection of said articles against corrosion. [Background technology]

[0002] 2. Background of the invention Articles in dry, wet, moist, submerged or flooded environments, such as sweating pipelines, submerged oil lines or pipes, gas lines or pipes, transportation pipes and risers and platform legs of oil drilling and production rigs or platforms, are subject to corrosion or degradation above, in and below water bodies. These articles may be subject to water degradation or damage, corrosive contamination, wetting and drying cycles, freezing and thawing cycles, and electrolysis. Erosion, marine life, mechanical impact, water content and abrasion may also cause premature failure of even properly designed articles. It is therefore necessary to protect such articles from damage and / or degradation.

[0003] Anticorrosion treatments carried out so far use semi-manual techniques. The most widely practiced solution consists in employing the services of divers who manually coat the elements to be treated, for example with paints, resins or plasters, under several meters or tens of meters of water. Such techniques are practiced under difficult conditions, are very expensive and dangerous and are often rather unsatisfactory in terms of effectiveness.

[0004] In addition to the adverse effects of corrosion, submerged articles are subject to various mechanical stresses, for example gravity, the repeated impact of waves, the pressure of underwater currents, or traction forces against fixed points. Offshore drilling and production platforms and platform legs, especially the risers, are relatively sensitive structures in this respect, due to their construction and exposure to the natural elements.

[0005] Methods for corrosion protection of structures in marine environments and / or partially or fully submerged structures are known in the art and involve the use of casings in conjunction with corrosion inhibitors such as curable polymeric compositions.

[0006] US Pat. No. 5,399,433 discloses a jacket structure into which a curable two-component polymer composition is injected, after which the polymer composition is cured.

[0007] US Pat. No. 5,399,633 discloses a device for protecting branch girder joints from corrosion.

[0008] US Patent No. 5,399,633 discloses a method in which a jacket is placed around the pile and then air and preheated gas are injected to dry the pile. In the next step, the jacket is filled with an expanding closed cell form formed from liquid chemicals or epoxy resin.

[0009] US Pat. No. 5,399,633 discloses a form comprising an elongated member, preferably tubular, into which a hardenable resin material is injected into the annular space that exists between the metal article to be protected and the wall of the form.

[0010] A disadvantage of methods such as those disclosed in US Pat. No. 5,399,633, US Pat. No. 5,493,366, US Pat. No. 5,493,621 and US Pat. No. 5,523,663 is that a hardened rigid polymer composition is used, which generally has poor adhesion to the surface of the metal article. Furthermore, such polymer compositions result in a hard seal that may split or tear under the influence of mechanical stress, for example wave action. Another disadvantage of these materials, which may include, for example, epoxy resins, is that they are generally harmful to the environment. The hardened rigid polymers are also not easily removed from the metal article, although easy removal is important if repairs, replacements or inspections must be made. Several methods are known in the art that can be used to protect pipes from corrosion or other types of damage.

[0011] US Patent No. 5,399,633 discloses an improved non-polar, non-thermosetting, flowable polymer composition that can be used under humid conditions, but does not allow condensation to form on the surface of the article to be protected while the composition is being applied.

[0012] Patent document 6 relates to the use of a non-thermosetting flowable polymer composition for protecting underground metal articles from corrosion, the metal articles being in contact with moisture. Polymers comprising polyisobutene and / or poly(oxydimethylsilylene) having a viscosity of 60000-1200000 cSt (60-1200 Pa.s) at 20°C are advantageously used. The preparation may contain one or more fillers. The preparation may also contain one or more products obtained directly from petroleum. The non-polar non-thermosetting flowable polymer composition may be used to protect risers, steel parts and pipelines of oil drilling platforms flooded with seawater. However, during application of the composition, it is necessary that the surface of the riser, steel parts or pipeline is essentially dry in order for the composition to adhere sufficiently to the surface.

[0013] Patent document 7 discloses a band-like cover for sealing and covering a structure. The cover comprises a base and a kneadable material, such as a paste, which is non-polar and does not harden, a liquid polymer, for example a petroleum product. Preferably, a polymer comprising polyisobutene and / or poly(oxydimethylsilylene) with a viscosity of 60000-1200000 cSt (60-1200 Pa.s) at 20° C. is used. The product may comprise one or more fillers. The product may also comprise one or more products obtained directly or indirectly from petroleum, for example bituminous products, or paraffin-like products such as petroleum jelly and wax. This cover may be used in the marine industry, but the surface of the structure must be essentially dry during application of the cover to achieve sufficient adhesion of the cover to the surface.

[0014] Compositions commonly known in the art for the corrosion protection of fully submerged articles typically include waxes, petrolatum and bentonite, and can be applied to the surface of the article while the article is submerged in water. A drawback of such compositions is that the operating range is insufficient for certain applications. The operating temperatures of such compositions generally range from about -20°C to about 35°C, although under certain conditions a maximum operating temperature of about 45°C can be achieved. At temperatures higher than about 45°C, the composition becomes more liquid and does not adhere well to the surface of the article and drips off the surface. Furthermore, at temperatures above about 45°C, phase separation can occur. Due to the relatively low maximum operating temperature, the composition is not suitable for protecting non-submerged articles, e.g., parts of partially submerged articles that are located above the water level, or sweating pipelines. As a result, two different corrosion protection compositions are required for partially submerged articles: a composition for protecting the submerged parts (i.e., the parts located underwater) and a different composition for the parts located above the water level.

[0015] Patent Document 8 discloses an aqueous swelling water-stopping composition containing a rubber containing 10 to 40 weight percent (wt.%) polyisobutylene, 10 to 20 wt.% silicate, 10 to 60 wt.% bentonite (the silicate and bentonite act as fillers), and 10 to 40 wt.% plasticizer. The polyisobutylene preferably has a viscosity of about 840,000 to about 2,220,000 g mol -1 Viscosity average molecular weight M v Staudinger molecular weight M of 70,000 to 130,000, corresponding to s The preferred polyisobutene has a molecular weight of about 750,000 to 2,350,000 g mol -1 Vistanex having a viscosity average molecular weight of (登録商標) L-80, Vistanex (登録商標) L-100 and Vistanex (登録商標) The water-stopping composition is extruded into an elongated water stopper that can be inserted into a gap in a joint, for example, to stop water in the gap. Patent Document 8 does not mention corrosion prevention.

[0016] Patent Document 9 discloses a water-stopping composition that exhibits controlled swelling or volume expansion when immersed in water. An exemplary water-stopping composition includes about 10-30 wt.% of an elastomer blend, about 15-30 wt.% of a filler, about 20-40 wt.% of a plasticizer, and about 25-35 wt.% of a water-swellable bentonite clay. The elastomer blend includes 50-60 wt.% of a thermoplastic elastomer (TPE), 10-20 wt.% of a cross-linked butyl rubber, and 20-40 wt.% of polyisobutene. A water-stopping composition including 6.10-6.24 wt.% of polyisobutene is disclosed. Patent Document 9 does not mention corrosion protection. Patent Document 10 discloses a method for protection against corrosion of an article in a humid environment and further discloses a composition for protection against corrosion of an article in a humid environment. An exemplary composition includes an amorphous polymer composition having a glass transition temperature of -20°C or less, and a water-absorbing filler having a water absorption of 20 wt.% or more. The composition includes 20 to 80 wt.% of the amorphous polymer composition based on the total weight of the composition, and the amorphous polymer has a water absorption of 1,000 to 150,000 g mol -1 The number average molecular weight M ranges from n US Pat. No. 5,399,433 also relates to a tape comprising the composition and an article comprising a layer of the anticorrosive composition and a mechanical protection layer. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] U.S. Pat. No. 4,892,410 [Patent Document 2] U.S. Patent No. 5,049,005 [Patent Document 3] U.S. Patent No. 5,226,751 [Patent Document 4] U.S. Patent No. 5,591,265 [Patent Document 5] European Patent No. 1644433 [Patent Document 6] European Patent No. 751198 [Patent Document 7] European Patent No. 826817 [Patent Document 8] U.S. Pat. No. 4,558,875 [Patent Document 9] U.S. Pat. No. 5,663,230 [Patent Document 10] European Patent No. 2872554 Summary of the Invention [Problem to be solved by the invention]

[0018] There is a need in the art for a material to protect an article from corrosion that can be applied on and under water. This means that there is an unmet need for a material that can be applied in dry, damp, wet, submerged or flooded environments to minimize the risk of corrosion. Such a material forms an effective barrier against oxygen and water. Furthermore, there is a need for a material that can be used at higher temperatures than materials known in the art that have a wide range of operating temperatures. There is also a need for a material that is easy to apply to the article to be protected and that can be applied while the article is in a dry, damp, wet, submerged or flooded environment. Preferably, the material can be applied to a dry, damp, wet, submerged or flooded environment without requiring extensive pre-treatment of the article to be protected. [Means for solving the problem]

[0019] 3. Overview of the Invention Described herein are compositions for protection against corrosion, methods for protection against corrosion, and articles and tapes comprising the compositions of the present invention.

[0020] In a first aspect, the present invention provides a composition for protection against corrosion of an article, the composition comprising: (i) a glass transition temperature of −20° C. or less, as determined by differential scanning calorimetry (DSC), and a molecular weight of from 1,000 to 3,050,000 g mol, as determined by gel permeation chromatography. -1and (ii) a water-absorbing filler having a water absorption rate of 20 wt.% or more, as determined according to the procedure set forth in the EN-ISO 10769:2011 standard, the water-absorbing filler comprising a filler that binds water by chemical reaction, the composition comprising at least 30 wt.% of the amorphous polymer composition, based on the total weight of the composition for protection against corrosion, the composition comprising (a) at least 30 wt.% of a non-polymeric water-absorbing filler, and / or (b) at least 0.1 wt.% of a polymeric water-absorbing filler, based on the total weight of the composition for protection against corrosion.

[0021] In a second aspect, there is provided herein a tape comprising a layer comprising the corrosion protection composition of the present invention.

[0022] The present invention also provides an article comprising: (a) (i) a layer of an anticorrosion composition of the present invention on a surface of the article; and (ii) a mechanical protective layer for protecting the layer of anticorrosion composition; or (b) a tape of the present invention.

[0023] The present invention also provides a method for protection against corrosion of an article, comprising the steps of, in the following order: (a) applying a layer of the corrosion protection composition of the present invention or the tape of the present invention; and (b) applying a mechanical protection layer over the layer of the corrosion protection composition or the layer of the tape, wherein the article is in a dry, damp, wet, submerged or water-filled environment during application of the layer of the corrosion protection composition of the present invention or the tape of the present invention. Effect of the Invention

[0024] The present invention solves all the problems associated with the prior art, and in particular shows that the compositions provided herein can be easily applied to wet, moist and dry surfaces and have improved physical properties such as reduced water absorption characteristics and increased viscosity. Furthermore, the compositions provided herein have good thermal stability. Furthermore, the compositions of the present invention have good compatibility with cathodic protection systems and do not contain environmentally harmful substances. The compositions are also easy to install, inspect and repair. The compositions of the present invention have excellent adhesion to various types of substrates such as carbon steel and alloy steel, as well as existing coatings such as neoprene, epoxy, and polyolefin. The compositions can be applied to surfaces above the freezing point and have improved physical properties such as reduced water absorption characteristics and increased viscosity. max It can be applied to substrates wetted or immersed in various types of water, such as very pure water from condensation, fresh water, and sea water, at temperatures ranging from 100°C to 200°C. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] 4. Detailed Description of the Invention As used in this specification and claims, the verb "to comprise" and its conjugations are used in an open-ended sense to mean that the items following the word are included, but items not specifically mentioned are not excluded.

[0026] Reference to an element by the indefinite article "a" or "an" does not exclude the possibility that more than one element is present, unless the context clearly requires that one and only one of the element is present. The article "a" or "an" normally means "at least one".

[0027] All possible combinations of the embodiments are included herein, even if disclosed as separate embodiments.

[0028] As used herein, the term "average molecular weight" refers to the number average molecular weight (M n )”, “Viscosity average molecular weight (M v ) or "Weight average molecular weight (M w)".

[0029] The term "polymer" includes homopolymers and copolymers.

[0030] The term "copolymer" includes polymers that contain two or more different monomers.

[0031] The term "amorphous polymer(s)" is defined as polymers that form a broad group of materials including glassy, ​​hard, brittle and ductile polymers. Depending on temperature and structure, amorphous polymers exhibit widely different physical and mechanical behavior patterns. In general, amorphous polymers do not show crystalline X-ray diffraction patterns (LH Sperling. Induction to Physical Polymer Science. 2006. John Wiley & Sons, Inc. ISBN 0-471-70606-X; Amorphous Polymers. In: Electron Microscopy of Polymers. Springer Laboratory. 2008. Springer, Berlin, Heidelberg).

[0032] The term "amorphous" refers to the amorphous structure of a polymer. Polymers with amorphous morphology hold their atoms together in a randomly ordered molecular structure that corresponds to loosely folded chains. Some polymers can exist in both amorphous and crystalline states at the same time (LH Sperling. Induction to Physical Polymer Science. 2006. John Wiley & Sons, Inc. ISBN 0-471-70606-X).

[0033] The term "polyalkene" refers to a polymer that contains at least an alkene monomer.

[0034] Generally, those skilled in the art will generally use the term "polyisobutene" to refer to amorphous polymers that contain isobutene monomer as the main component and, optionally, further monomers, such as 1-butene, 2-butene and / or butadiene. These amorphous polymers have similar properties, particularly with respect to glass transition temperature and surface tension. Depending on the desired purity of the polyisobutenes, they can be prepared in a variety of ways (see Ullmanns "Encyklopadie der technischen Chemie", 4th Ed., Vol. 19, pages 216-223, 1980, and Vol. 13, pages 621-623, 1977). The term "polyisobutene" refers to a polymer that contains isobutene monomer in an amount of at least about 50 wt.%, at least about 75 wt.%, at least about 90 wt.% or at least about 95 wt.%, etc., as well as C2-C3-C4-C5-C6-C8-C9-C10-C12-C16-C18-C19-C22-C3 ...22-C36-C18-C36-C18-C22-C36-C18-C36-C18-C22-C36-C18-C36-C18-C36-C18-C36-C18-C36-C18-C36-C18-C36-C18-C36-C18-C36- 12 Alkenes, C4-C 12 It includes polymers containing monomers selected from the group consisting of alkadienes, and mixtures thereof, in an amount of about 50 wt.% or less, about 25 wt.% or less, about 10 wt.% or less, or about 5 wt.% or less, calculated on the total weight of the polyisobutene. Thus, according to common general usage, the term "polyisobutene" encompasses polymers such as polybutene and essentially non-crosslinked butyl rubber, as described below. In this application, the term "polyisobutene" is used for isobutene polymers as defined above.

[0035] The term "polyisobutene homopolymer" is used herein to distinguish polyisobutenes having a very high isobutene monomer content from, for example, polyisobutenes having a lower isobutene monomer content as described above, as well as polybutenes and butyl rubbers described below. Thus, the term "polyisobutene homopolymer" as used herein refers to a polymer that essentially consists of isobutene monomers, i.e., a polymer that contains from about 98% to about 100% isobutene total weight, preferably from about 99% to about 100%, more preferably from about 99.5% to about 100%, even more preferably from about 99.7% to about 100%, and especially from about 99.9% to about 100% isobutene total weight, based on the total weight of the polymer.

[0036] As used herein, the term "polybutene" refers to a polymer prepared from a C4 fraction obtained from a petroleum refining process, such as a C4 fraction containing 1-butene, 2-butene, isobutene, and optionally butadiene.

[0037] The term "butyl rubber" refers to a polymer of about 95 wt.% to about 98 wt.% isobutene and about 2 wt.% to about 5 wt.% isoprene, based on the total weight of the polymer.

[0038] The term "water-absorbing filler" is defined as a material capable of absorbing water and suitable for use as a filler material. "Water-absorbing filler" includes all fillers that bind water by irreversible chemical or reversible physical reactions. Water-absorbing fillers may be polymeric or non-polymeric. Calcium carbonate (CaCO3) is not a water-absorbing filler according to the definition of the present invention.

[0039] "Water absorption rate" (w A The term water absorbed by a material is defined as the amount of water absorbed by the material, expressed as the mass of the dry material (m d ) to the mass of absorbed water (m wgThe water absorption is calculated as the ratio of the absorbed water to the dry mass of the filler sample. The results can also be expressed as a percentage by mass. The water absorption can be determined according to EN-ISO 10769:2011. In simple terms, the amount of absorbed water relative to the dry mass of the filler sample is determined over time by an automated electronic balance system. The water absorption value w A is determined during a 24-hour test period.

[0040] The term "water absorption of a filler" or "water absorption" is defined herein as the amount of water absorbed, bound, and / or stored relative to the dry mass of the filler in a specific amount of time, including binding of water by physical reversible reactions or chemical irreversible reactions. In the former case, the water may be released again under certain circumstances, while in the latter case, the water is permanently fixed. Water absorption (w A ) is the mass of water absorbed by a dry filler specimen in a given time (m wg ) of the dry mass of the filler test piece (m d The water absorption rate is expressed as a ratio to the mass percentage (wt.%).

number

[0041] The term "filler" as used herein refers to water-absorbing and non-water-absorbing (inert) fillers. Water-absorbing fillers can be any filler, including organic and / or inorganic fillers. Polymeric fillers can be any type of polymeric filler used in the art. Water-absorbing fillers may include swellable fillers, i.e., fillers that expand when wet or moistened.

[0042] The term "mechanical protective layer" refers to a layer that mechanically protects one or more underlying layers from external effects.

[0043] Within the context of the present invention, the sum of all components constituting the "protective composition" always equals 100%. The weight percentages of all components of the anticorrosive composition equal 100%.

[0044] 4.1 Amorphous polymers The amorphous polymer is preferably a hydrocarbon-based polymer. The hydrocarbon-based polymer is optionally (partially) halogenated, preferably halogenated by bromine, chlorine or fluorine. The hydrocarbon-based polymer is preferably essentially non-vulcanized (non-crosslinked) so that its low temperature flow properties are optimized. The amorphous polymer may comprise one or more different amorphous polymers. For example, the amorphous polymer may be a blend of two or more different amorphous polymers.

[0045] Amorphous polymers may include low molecular weight polymers. Amorphous polymers may include medium molecular weight polymers. Amorphous polymers may include high molecular weight polymers. Number average molecular weight and molecular weight distribution may be determined by gel permeation chromatography (GPC), as is well known in the art.

[0046] The average molecular weight is the number average molecular weight (M n In one embodiment, the amorphous polymer has a molecular weight of 1,000 to 2,000,000 g mol -1 Number average molecular weight M n In one embodiment, the number average molecular weight M n is 1,050 to 1,950,000 g mol -1 In one embodiment, the amorphous polymer has a molecular weight in the range of 1,500 to 1,000,000, more preferably in the range of 20 to 600 million, even more preferably in the range of 2,500 to 250,000, and especially in the range of 15,000 to 100,000 g mol -1 The number average molecular weight M ranges from n In one embodiment, the amorphous polymer has a number average molecular weight M n is at least 1,000, at least 5,000, at least 10,000, at least 15,000, or at least 235,000 g mol -1 It is.

[0047] In one embodiment, the amorphous polymer has a molecular weight of 1,000 to 2,300 g mol-1 Number average molecular weight M n In a specific embodiment, the amorphous polymer has a number average molecular weight M n is 1,000, 1,300, 1,500, 1,800, or 2,300 g mol -1 In another embodiment, the amorphous polymer has a molecular weight of 16,500, 21,000 or 33,700 g mol -1 Number average molecular weight M n In one embodiment, the amorphous polymer has a molecular weight of 235,000, 437,000, 534,000 or 2,000,000 g mol -1 Number average molecular weight M n has.

[0048] The average molecular weight is the viscosity average molecular weight (M v In one embodiment, the amorphous polymer has a molecular weight of 40,000 to 2,600,000 g mol -1 The average molecular weight M v In one embodiment, the amorphous polymer has a molecular weight of 60,000 to 1,000,000 g mol -1 The average molecular weight M v In one embodiment, the amorphous polymer has a molecular weight of 70,000 to 800,000 g mol -1 The average molecular weight M v In one embodiment, the amorphous polymer has a molecular weight of 85,000 to 425,000 g mol -1 The average molecular weight M v In one embodiment, the amorphous polymer has a molecular weight of 40,000 to 85,000 g mol -1 The average molecular weight M v In one embodiment, the amorphous polymer has a molecular weight of 50,000 to 80,000, more preferably 60,000 to 70,000 g mol -1 The average molecular weight M v In a specific embodiment, the amorphous polymer has an average molecular weight M v is 40,000, 47,000, 55,000, 65,000, 73,000, or 85,000 g mol -1In one embodiment, the average molecular weight is 40,000. In one embodiment, the average molecular weight M v is approximately 425,000 to 2,600,000 g mol -1 In one embodiment, the average molecular weight is about 600,000 to 2,000,000, more preferably about 1,000,000 to 1,500,000 g mol -1 In specific embodiments, the average molecular weight is about 425,000, 800,000, 1,110,000, or 2,600,000 g mol -1 It is.

[0049] The average molecular weight is the average molecular weight (M w ) (expressed in PS equivalents). In one embodiment, the amorphous polymer has an average molecular weight M w In one embodiment, the amorphous polymer has an average molecular weight M of 53,000 to 3,000,000. w In one embodiment, the amorphous polymer has an average molecular weight M of 70,000 to 1,600,000. w In one embodiment, the amorphous polymer has an average molecular weight M of 100,000 to 1,000,000. w In one embodiment, the amorphous polymer has an average molecular weight M of 53,000 to 108,000. w In one embodiment, the amorphous polymer has an average molecular weight M of 53,000, 70,000, or 108,000. w In one embodiment, the amorphous polymer has an average molecular weight M of 565,000 to 3,050,000. w In one embodiment, the amorphous polymer has an average molecular weight M of 565,000, 1,050,000, 1,550,000, or 3,050,000. w has.

[0050] The number average molecular weight (M n ), viscosity average molecular weight (M v ), and / or weight average molecular weight (M wThe present invention also encompasses amorphous polymers that can be described by any combination of the above. For example, in one embodiment, the amorphous polymer has an average molecular weight of about 1,000 to about 3,050,000. In one embodiment, the amorphous polymer has an average molecular weight of about 1,300 to about 2,600,000, more preferably about 1,500 to about 1,550,000, and even more preferably about 2,300 to about 1,050,000.

[0051] Preferably, the molecular weight distribution M of the amorphous polymer w / M n is about 1 to 10, more preferably about 1 to 5, even more preferably about 1 to 4, and most preferably about 1.5 to 3.5.

[0052] The amorphous polymer has a glass transition temperature T of less than about -20°C, preferably less than about -30°C, more preferably less than about -40°C, even more preferably less than about -50°C, and most preferably less than about -60°C. g The amorphous polymer preferably has a surface tension of less than about 50 mN / m at 20° C., preferably less than about 40 mN / m at 20° C. The glass transition temperature can be determined by differential scanning calorimetry (DSC) as known in the art. The surface tension can be determined by methods known in the art (see S. Wu, J. Colloid. Interface. Sci. 31, 153, 1969; DG LeGrand, GL Gaines, Jr., J. Colloid. Interface Sci. 31, 162, 1969).

[0053] The amorphous polymer is preferably a polyalkene. Preferred monomers for preparing the amorphous polymer are C2-C 12 Alkenes, C4-C 12 The monomer is selected from the group consisting of alkadienes, alkadiene, and mixtures thereof, where the alkene and / or alkadiene may be substituted with one or more bromine, chlorine or fluorine atoms. The alkene may be an α-alkene or an internal alkene. The diene may be conjugated or non-conjugated.

[0054] Preferably, C2 to C 12 The alkene is selected from the group consisting of ethene, propene, 1-butene, 2-butene, isobutene (2-methylpropene), 1-pentene, 1-hexene, 2-methyl-1-pentene, 4-methyl-1-pentene, 1-octene, and mixtures thereof.

[0055] Preferably, C4 to C 12 The alkadiene is selected from the group consisting of butadiene, isoprene (2-methyl-1,3-butadiene), 2,4-dimethylbutadiene, penta-1,3-diene, 3-methyl-1,3-pentadiene, 2,4-hexadiene, 2-neopentyl-1,3-butadiene, 2-methyl-1,5-hexadiene, 2,5-dimethyl-2,4-hexadiene, 2-methyl-1,4-pentadiene, 2-methyl-1,6-heptadiene, cyclopentadiene, methylcyclopentadiene, cyclohexadiene, 1-vinyl-cyclohexadiene, norbornadiene, 5-ethylidene-2-norbornene, divinylbenzene, dicyclopentadiene, 1,4-hexadiene, 5-vinyl-2-norbornene and mixtures thereof.

[0056] Amorphous polymers having a glass transition temperature of less than about -20°C are known in the art and are described, for example, in Kirk-Othmer, Encyclopedia of Chemical Technology, 4 th Ed., Vol. 8, pages 905-1093, 1993, and 4 th Ed., Vol. 9, pages 1-37, 1994, and the Polymer Handbook, 3 rdEd., J. Bandrup, E. H Immergut (Eds.), 1989. The Polymer Handbook gives many examples of amorphous polymers with glass transition temperatures below about -20 °C: butyl rubber (unvulcanized) at about -71 °C, poly(1-hexene) (prepared by Ziegler-Natta catalysis: see ref. 1072: J. Bourdariat, R. Isnard, J. Odin, J. Polym. Sci., Polym. Phys. Ed. 11, 1817-1828, 1973) at about -58 °C (page VI / 213), isotactic poly(1-butene) at about -24 °C (see, for example, R.W. Warfield, R. Brown, J. Polym. Sci. A-2 5, 791, 1967) (page VI / 213) and poly(isobutene) at about -73 °C (page VI / 214). It should be noted that some of these polymers may be (partially) crystalline, which often depends on the catalyst composition and process conditions used in the polymerization process. For example, EP 300638 A2 discloses a method for preparing highly crystalline poly(1-butene). However, it can be assumed that, for example, a specific polyisobutene, a specific polybutene or a specific butyl rubber may have a glass transition temperature different from the values ​​listed in the polymer handbook. The glass transition temperature of atactic polypropene is about -20°C (see U. Gaur, B. Wunderlich, J. Phys. Chem. Ref. Dta 10, 1052-1063, 1981).

[0057] Amorphous polymers having a surface tension of less than about 50 mN / m at 20° C. are also known in the art. rd Ed., J. Bandrup, E. H Immergut (Eds.), 1989, give various examples of such amorphous polymers: polyisobutene (M n =2300): 33.6 mN / m at 20°C; atactic polypropene: 29.4 mN / m at 20°C; branched polyethylene (M n =7000: 35.3 mN / m at 20°C; ethene propene copolymer (M wrange of about 15,000 to about 63,000; propene content range of about 34 mol% to about 60 mol%): 30.7 to 33.8 mN / m at 20° C.; poly(4-methyl-1-pentene): 25 mN / m at 20° C. It should be noted that for molecular weights greater than about 2000, the surface tension is essentially independent of molecular weight, in which case the surface tension will reach within about 1 mN / m of the value at the uncertain molecular weight.

[0058] According to a preferred embodiment, the amorphous polymer preferably comprises (a) about 50.0% by weight to about 98% by weight of isobutene and about 2% by weight to about 50.0% by weight of C2-C4 copolymers other than isobutene, based on the total weight of the polymer. 12 Alkenes, C4-C 12 (b) a polymer containing from about 98% to about 100% by weight of isobutene, based on the total weight of the polymer; (c) a polymer containing from about 50.0% to about 99.9% by weight of propene and from about 0.1% to about 50.0% of a C2-C3 alkylene compound other than propene, based on the total weight of the polymer. 12 Alkenes, C4-C 12 (d) a polymer containing an alkadiene, or a mixture thereof, or about 100 wt.% propene; (e) about 0.1 wt.% to about 50.0 wt.% ethene and about 50.0% to about 99.9% C2-C3 other than ethene, based on the total weight of the polymer. 12 Alkenes, C4-C 12 (e) a polymer comprising an alkadiene, or a mixture thereof; (f) from about 0.1% by weight to about 50.0% by weight of 2-methyl-1-pentene and from about 50.0% by weight to about 99.9% by weight of a C2-C3 alkylene compound other than 2-methyl-1-pentene, based on the total weight of the polymer; 12 Alkenes, C4-C 12 an alkadiene, or mixtures thereof, or a polymer comprising about 100 wt.% 2-methyl-1-pentene; and mixtures of (a), (b), (c), (d) and / or (e).

[0059] Examples of group (a) include "polyisobutene", "polybutene" and "butyl rubber". Examples of group (b) include "polyisobutene homopolymer". Examples of group (c) include ethene-propene elastomers, EPDM elastomers and atactic polypropene. Examples of group (d) include ethenebutene copolymers. Examples of group (e) include homopolymers of 2-methyl-1-pentene.

[0060] According to a more preferred embodiment of the present invention, the amorphous polymer is polyisobutene, polybutene, butyl rubber, atactic polypropene, propene and C2-C olefins other than propene. 12 Copolymers with alkenes (optionally dienes), C2-C other than ethene and ethene 12 According to an even more preferred embodiment of the present invention, the amorphous polymer is selected from the group consisting of ethene-propene copolymers, ethene-butene copolymers, ethene-propene-butene terpolymers, ethene-propene-diene copolymers, polyisobutene, polybutene, butyl rubber, atactic polypropene and mixtures thereof. Even more preferably, the amorphous polymer is selected from the group consisting of polyisobutene, polybutene, butyl rubber, atactic polypropene and mixtures thereof. Even more preferably, the amorphous polymer is selected from the group consisting of (a), (b) and mixtures thereof, where (a) and (b) are the polymers defined above. Even more preferably, the amorphous polymer is selected from the group consisting of polyisobutene, polybutene, butyl rubber and mixtures thereof. Even more preferably, the amorphous polymer is polyisobutene, preferably the polyisobutene is a polyisobutene homopolymer. All of these polymers have glass transition temperatures below about -20°C as disclosed above.

[0061] The viscosity of the amorphous polymers and all products described herein is determined according to ISO 3219. Measurements are performed at 70.0°C.

[0062] Preferably, the polybutene is tensile strength according to ASTM D 445 (e.g., the Saybolt Universal Seconds data used in the Ineos data sheet of September 2008 are in mm according to ASTM D 2161). 2 .s -1 In accordance with the above, the number average molecular weight M of about 500 to about 20,000, more preferably about 1,300 to about 20,000, can be obtained. n , molecular weight distribution of about 1.5 to about 3, about 0.90 to about 0.98 g / cm 3 and approximately 200 cSt (mm 2 .s -1 )~Approx. 100,000cSt(mm 2 .s -1 ) kinematic viscosity. Suitable polybutenes include, for example, several Indopol grades available from Ineos (UK), several polybutene grades available from Kermat (Belgium), several Nisseki polybutene grades available from JX Nippon Oil & Energy (Japan), and several KVIS grades available from Kothari Petrochemicals (India). For example, Indopol H-300 has a glass transition temperature of about -66.9°C (DSC), M n 1300 (GPC), molecular weight distribution 1.65 (GPC), density 0.904 g / cm 3 , and kinematic viscosity at 100°C of about 605 to about 655 cSt (Ineos data sheet, September 2008). Indopol H-18000 has an M of about 6000. n (GPC), molecular weight distribution (GPC) of about 1.70, about 0.921 g / cm 3 and a kinematic viscosity of about 36,000 to about 45,000 cSt at 100°C (Ineos Data Sheet, September 2008). KVIS 30 has a molecular weight of about 1250 to about 1350, a kinematic viscosity of about 600 to 697 cSt at 100°C, and a viscosity of about 0.8910 to about 0.910 g / cm 3 has a density of

[0063] The butyl rubber preferably has a Mooney viscosity ML 1+8 (ASTM D 1646; 125°C) of about 25 to about 75 and an unsaturation level of about 1.0 to about 3.0 mol%. Suitable materials include those having a viscosity of 0.92 g / cm 3 Exxon, which has a density of (商標) Butyl rubber and 0.92g / cm 3 %, a Mooney viscosity ML 1+8 (ASTM D 1646; 125° C.) of 51±5 and 1.75±0.20 mol % unsaturation.

[0064] Poly(2-methyl-1-pentene) preferably has a melt index of about 1 to about 250 g / min (ASTM D 1236, 260° C., 5 kg), a softening point of about 160° to about 200° C. (Vicat, ASTM D 1525), and a viscosity of about 0.82 to about 0.95 g / cm at 25° C. 3 Amorphous poly(2-methyl-1-pentene) with a low glass transition temperature is disclosed, for example, in Haiyang Gao, Xiaofang Liu, Ying Tang, Jin Pan and Qing Wu, Polym. Chem. 2(6), 1398-1403, 2011.

[0065] The ethene-propene copolymers, ethene-butene copolymers and ethene-propene-butene terpolymers preferably have a Brookfield viscosity of about 300 to about 200,000 mPa.s at 190° C. according to ASTM D 3236. Suitable products include certain Eastoflex grades available from Eastman Chemical Company, Rextac grades from Rextac LLC, (登録商標) Vestoplast grade and Evonik (登録商標)Ethene-propene copolymer Eastoflex 1045, for example, has a Brookfield viscosity (ASTM D 3236) of about 4500 mPa.s and a glass transition temperature of -22°C, whereas Eastoflex E 1003 has a Brookfield viscosity (ASTM D 3236) of about 300 mPa.s and a glass transition temperature of -33°C (Eastman brochure "Eastoflex (商標) Another example is Vestoplast®, which has a glass transition temperature of about -28°C and a Brookfield viscosity of about 2700 mPa.s at 190°C. (登録商標) 703, and Vestoplast, which has a glass transition temperature of about -27°C and a Brookfield viscosity of about 120,000 mPa.s at 190°C. (登録商標) 792 (Evonik brochure "Vestoplast (登録商標) In such amorphous propene copolymers and terpolymers, the amount of propene is preferably at least about 50 wt.%, and preferably from about 70 to about 98 wt.%, based on the total weight of the atactic propene copolymer.

[0066] Atactic polypropene has a Brookfield viscosity of about 200 to about 10,000 mPa.s at 190° C. according to ASTM D 3236. Suitable products include Polytactic Polypropene from Crowley Chemical Company. (商標) Grade and Rextac LLC's Rextac (登録商標) Grades include: Polytac (商標) The grades have Brookfield viscosities ranging from about 500 to about 2500 mPa.s at 190°C and are (登録商標) 2104, 2115 and 2180 have Brookfield viscosities at 190°C of 400, 1500 and 8000 mPa.s respectively.

[0067] The polyisobutene has a number average molecular weight (M n ), viscosity average molecular weight (M v ) or weight average molecular weight (M w Similarly, the molecular weight distribution M of polyisobutene w / M n is as stated above.

[0068] Low molecular weight, for example, polyisobutene with a number average molecular weight M up to about 2,500 n is determined by GPC. For higher number average molecular weights, viscosity measurements (Staudinger index J o ) and the Staudinger index is calculated from the flow time at 20° C. through the capillary of an Ubbelohde viscometer (a diluted polymer solution is used to measure the flow time) using the following formula: J o = η sp / c(1+0.31×η sp )[cm 3 / g] η sp =(t / t o )-1 where t is the flow time of the solution according to the Hagenbach-Couette correction, and t o is the flow time of the solvent (e.g., isooctane) with Hagenbach-Couette correction, and c is the g / cm of solution 3 The concentration of the unit is then the number average molecular weight M n and viscosity average molecular weight M v is calculated as follows:

number

[0069] Accessed June 17, 2021. (登録商標) BASF’s website (www.basf.com) and the July 2019 BASF brochure “Oppanol (登録商標)B type" (10N~15N (10 SFN~15 SFN)) and the July 2019 BASF brochure "Oppanol (登録商標) Please refer to "N Type" (50~150).

[0070] The polyisobutene used in the composition of the present invention preferably has a viscosity of from about 1 to about 1500 cm when determined at 20° C. 3 / g, preferably about 2 to about 1000 cm 3 Staudinger exponent J / g o In one embodiment, the polyisobutene has a molecular weight of about 1 to about 500 cm 3 / g, preferably about 2 to about 300 cm 3 / g, more preferably about 3 to about 150 cm 3 Staudinger exponent J / g o has.

[0071] The polyisobutene preferably has a surface tension of less than about 40 mN / m at 20° C. The density of the polyisobutene is preferably about 0.86 to about 0.98 cm 3 / g.

[0072] Polyisobutene can be prepared in a variety of ways. The polymerization may be carried out in a single-stage or multi-stage process. The polymerization is preferably carried out in the liquid phase using a Lewis acid as catalyst, preferably a boron trifluoride complex catalyst, optionally in the presence of a cocatalyst. Such methods are well known in the art.

[0073] A preferred polyisobutene is Glissopal, available from BASF. (登録商標) and Oppanol (登録商標) Grades, especially Oppanol (登録商標) These are from grades B and N type. Other preferred polyisobutenes, particularly the Tetrax grades, are available from Nippon Oil Corporation. These polyisobutenes are classified herein as "polyisobutene homopolymers", i.e., polymers containing greater than about 98 wt.% isobutene, based on the total weight of the polymer.

[0074] 4.2 Amorphous polymer compositions The amorphous polymer composition may comprise an amorphous polymer or a mixture of two or more amorphous polymers, the amorphous polymer having the properties as disclosed above.

[0075] The amorphous polymer of the amorphous polymer composition has a number average molecular weight (M n ), viscosity average molecular weight (M v ), or weight average molecular weight (M w Similarly, the molecular weight distribution of an amorphous polymer, M w / M n is as stated above.

[0076] The amorphous polymer composition preferably comprises about 50 to about 100 wt. % polyisobutene, and more preferably about 0 to about 50 wt. % of one or more other amorphous polymers, based on the total weight of the amorphous polymer composition, wherein the one or more other amorphous polymers are selected from the group consisting of amorphous polymers (a) to (f) as disclosed above.

[0077] More preferably, the other amorphous polymer is selected from the group consisting of polybutene, polyisobutene, butyl rubber, ethene-propene copolymer, ethene-butene copolymer, ethane-propene-butene terpolymer, amorphous propene copolymer, atactic polypropene, poly(2-methyl-1-pentene), and mixtures thereof. These polymers, as disclosed above, have a glass transition temperature of less than about -20°C.

[0078] More preferably, the amorphous polymer composition comprises about 70 to about 100 wt.% polyisobutene, preferably polyisobutene homopolymer, and about 0 to about 30 wt.% of one or more other amorphous polymers. Even more preferably, the amorphous polymer composition comprises about 90 to about 100 wt.% polyisobutene, preferably polyisobutene homopolymer, and about 0 to about 10 wt.% of one or more other amorphous polymers. Most preferably, the amorphous polymer composition comprises about 100 wt.% polyisobutene, preferably polyisobutene homopolymer, based on the total weight of the amorphous polymer composition.

[0079] In one embodiment, the amorphous polymer composition comprises about 75 to about 95 wt.% polyisobutene, preferably polyisobutene homopolymer, and about 5 to about 25 wt.% of one or more other amorphous polymers, based on the total weight of the amorphous polymer composition. The present invention also relates to an amorphous polymer composition comprising about 80 to about 90 wt.% polyisobutene and / or polyisobutene homopolymer and about 10 to about 20 wt.% of one or more other amorphous polymers, based on the total weight of the amorphous polymer composition. In one embodiment, the amorphous polymer composition comprises about 20 wt.%, about 30 wt.%, about 40 wt.%, about 50 wt.%, about 60 wt.%, about 70 wt.%, about 80 wt.%, or about 90 wt.% of one or more other amorphous polymers, based on the total weight of the amorphous polymer composition.

[0080] 4.3 Anticorrosive composition The anticorrosive composition comprises (i) an amorphous polymer composition comprising an amorphous polymer having a glass transition temperature of −20° C. or less, and (ii) a water-absorbing filler. The amorphous polymer composition (i) and the amorphous polymer are described in detail above. Details of the water-absorbing filler (ii) are described below (see Section 4.4).

[0081] In one embodiment, the composition of the present invention comprises at least 30 wt.%, at least 40 wt.%, at least 50 wt.%, at least 60 wt.%, or at least 70 wt.% of the amorphous polymer composition, based on the total weight of the composition. In one embodiment, the composition comprises about 30 to about 70 wt.%, about 30 to about 60 wt.%, about 40 to about 50 wt.%, about 40 to about 60 wt.%, or about 40 to about 70 wt.% of the amorphous polymer composition, based on the total weight of the composition. In one embodiment, the composition of the present invention comprises about 42 wt.% of the amorphous polymer composition.

[0082] The amorphous polymer of the corrosion protection composition has a number average molecular weight (M n ), viscosity average molecular weight (M v ), or weight average molecular weight (M w Similarly, the molecular weight distribution of an amorphous polymer, M w / M n is as stated above.

[0083] In one embodiment, the amorphous polymer composition comprising an amorphous polymer has a glass transition temperature of −20° C. or less as determined by DSC, and has a number average molecular weight (M) as described for the amorphous polymer above. n ), viscosity average molecular weight (M v ), or weight average molecular weight (M w ).

[0084] The anticorrosive composition preferably comprises at least about 30 wt.% or more of the non-polymeric water-absorbing filler (ii) based on the total weight of the composition. In one embodiment, the composition comprises about 35 wt.% or more, about 40 wt.% or more, about 50 wt.% or more, or about 60 wt.% of the non-polymeric water-absorbing filler (ii) based on the total weight of the composition. In one embodiment, the composition comprises about 60 wt.% or less, about 55 wt.% or less, about 50 wt.% or less, or about 40 wt.% or less of the non-polymeric water-absorbing filler (ii) based on the total weight of the composition. In one embodiment, the composition comprises about 30-70 wt.%, about 30-60 wt.%, about 40-60 wt.%, or about 40-70 wt.% of the non-polymeric water-absorbing filler (ii) based on the total weight of the composition.

[0085] In one embodiment, the anticorrosive composition comprises at least about 40 wt.% of the amorphous polymer composition (i) and at least about 30 wt.% of the non-polymeric water-absorbing filler (ii) based on the total weight of the composition. In one embodiment, the anticorrosive composition comprises about 30-70 wt.% of the amorphous polymer composition (i) and about 30-70 wt.% of the non-polymeric water-absorbing filler (ii) based on the total weight of the composition. In one embodiment, the anticorrosive composition comprises about 40 wt.%-60 wt.% of the amorphous polymer composition (i) and about 40 wt.%-60 wt.% of the non-polymeric water-absorbing filler (ii) based on the total weight of the composition.

[0086] In one embodiment, the anticorrosive composition comprises at least about 40 wt.% of the amorphous polymer composition (i) and at least about 0.1 wt.% of the polymeric water-absorbing filler (ii) based on the total weight of the composition. In one embodiment, the anticorrosive composition comprises about 30-70 wt.% of the amorphous polymer composition (i) and about 0.1-10 wt.% of the polymeric water-absorbing filler (ii) based on the total weight of the composition. In one embodiment, the anticorrosive composition comprises about 40-60 wt.% of the amorphous polymer composition (i) and about 0.2-9 wt.% of the polymeric water-absorbing filler (ii) based on the total weight of the composition.

[0087] In one embodiment, the anticorrosive composition comprises at least about 40 wt.% of the amorphous polymer composition, at least about 0.1 wt.% of the polymeric water-absorbing filler, and at least about 30 wt.% of the non-polymeric water-absorbing filler. In one embodiment, the anticorrosive composition comprises about 30-50 wt.% of the amorphous polymer composition, about 0.3-10 wt.% of the polymeric water-absorbing filler, and about 30-60 wt.% of the non-polymeric water-absorbing filler. In one embodiment, the anticorrosive composition comprises about 40-50 wt.% of the amorphous polymer composition, about 0.5-9 wt.% of the polymeric water-absorbing filler, and about 50-60 wt.% of the non-polymeric water-absorbing filler. In one embodiment, the anticorrosive composition comprises about 42 wt.% of the amorphous polymer composition. All weight percentages are based on the total weight of the composition.

[0088] In one embodiment, the composition comprises about 30-70 wt.% of the amorphous polymer composition and at least 30 wt.% of a non-polymeric water-absorbing filler and optionally at least 0.1 wt.% of a polymeric water-absorbing filler.

[0089] In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 8 wt.% or more. In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 9 wt.% or more. In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 10 wt.% or more. In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 20 wt.% or more. In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 30 wt.% or more. In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 40 wt.% or more. All weight percentages are based on the total weight of the composition.

[0090] In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 8-50 wt.%. In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 10-50 wt.%. In one embodiment, the corrosion protection composition includes a water absorbing filler that binds water by chemical reaction, the filler being present in an amount of about 15-45 wt.%. All weight percentages are based on the total weight of the composition.

[0091] In one embodiment, the present invention provides a composition for protection against corrosion, the composition comprising: (i) a glass transition temperature of −20° C. or less as determined by DSC, and a molecular weight of 1,000 to 3,050,000 g mol -1 and (ii) a water-absorbing filler having a water absorption rate of 20 wt.% or more, as determined according to the procedure set forth in the EN-ISO 10769:2011 standard, the water-absorbing filler comprising a filler which binds water by a chemical reaction, the composition for protection against corrosion comprising at least 30 wt.% amorphous polymer composition based on the total weight of the composition, the composition comprising, based on the total weight of all the compositions, (a) at least 30 wt.% non-polymeric water-absorbing filler, and / or (b) at least 0.1 wt.% polymeric water-absorbing filler.

[0092] In one embodiment, the present invention provides a composition for protection against corrosion, the composition comprising: (i) a glass transition temperature of −20° C. or less as determined by DSC, and a molecular weight of 1,000 to 3,050,000 g mol -1and (ii) a water-absorbing filler having a water absorption percentage of 20 wt.% or more, as determined according to the procedure set forth in the EN-ISO 10769:2011 standard, the water-absorbing filler comprising a filler which binds water by chemical reaction, the composition comprising at least 40 wt.% amorphous polymer composition based on the total weight of the composition for protection against corrosion, the composition comprising at least 30 wt.% non-polymeric water-absorbing filler, and / or at least 0.1 wt.% polymeric water-absorbing filler based on the total weight of the entire composition.

[0093] In one embodiment, the present invention provides a composition for protection against corrosion, the composition comprising: (i) a glass transition temperature of −20° C. or less as determined by DSC, and a molecular weight of 1,000 to 3,050,000 g mol -1 and (ii) a water-absorbing filler having a water absorption percentage of 20 wt.% or more, as determined according to the procedure set forth in the EN-ISO 10769:2011 standard, the water-absorbing filler comprising a filler that binds water by a chemical reaction, the composition comprising at least 40 wt.% amorphous polymer composition, the composition comprising, based on the total weight of the entire composition, (a) at least 40 wt.% non-polymeric water-absorbing filler, and / or (b) at least 0.1 wt.% polymeric water-absorbing filler.

[0094] In a preferred embodiment, the amorphous polymer is selected from the group of polymers consisting of (a) to (f) as defined above. In a more preferred embodiment, the amorphous polymer is selected from the group consisting of (a), (b) and mixtures thereof.

[0095] The anticorrosive composition may further include one or more other additives, such as additional filler materials and / or antioxidants, surface tension modifiers, pH adjusters, colorants, pigments, and the like.

[0096] In one embodiment, the anticorrosive composition of the present invention also comprises an antioxidant (iii), which is described in more detail below.

[0097] In one embodiment, the anticorrosive composition of the present invention comprises a pigment. The pigment can be selected from any pigment commonly used in the art. The anticorrosive composition may comprise a content of 0.1 wt.%, 0.2 wt.%, 0.3 wt.%, 0.4 wt.%, or 0.5 wt.% or more based on the total weight of the entire composition.

[0098] In one embodiment, the anticorrosive composition comprises about 30 to about 60 wt.% of the amorphous polymer composition (i) and about 30 to about 6 wt.% of the water-absorbing filler (ii), based on the total weight of the composition. When the sum does not equal 100 wt.%, it will be apparent to one of ordinary skill in the art that the composition includes additional components, such as additional filler materials, additives, etc.

[0099] In one embodiment, the anticorrosive composition of the present invention comprises about 40 to about 60 wt.% of the amorphous polymer composition (i) and about 40 to about 60 wt.% of the water-absorbing filler (ii) based on the total weight of the composition. In one embodiment, the anticorrosive composition of the present invention comprises about 40 to about 50 wt.% of the amorphous polymer composition (i) and about 35 to about 55 wt.% of the water-absorbing filler (ii) based on the total weight of the composition.

[0100] In one embodiment, the anticorrosive composition comprises, based on the total weight of the entire composition, (i) about 30 to about 50 wt.% of an amorphous polymer composition comprising an amorphous polymer having a glass transition temperature of −20° C. or less, (ii) about 30 to about 40 wt.% of a water-absorbing filler, and (iii) about 0.05 to about 5 wt.% of an antioxidant. Preferably, the sum of components (i), (ii) and (iii) is equal to 100 wt.%. If the sum is not equal to 100 wt.%, it will be apparent to one skilled in the art that the composition comprises additional components, such as additional filler materials, additives, etc.

[0101] Thus, the composition optionally further comprises one or more additives (iv) and / or one or more additional fillers (v). When one or more additives (iv) are present, each of the one or more additives is preferably present in an amount of about 0.01 to about 10 wt.%, preferably about 0.05 to about 5 wt.%, based on the total weight of the composition. When one or more fillers (v) are present, the total amount of the one or more additional fillers is preferably about 50 to about 60 wt.%, based on the total weight of the composition. Preferably, the sum of components (i), (ii), (iii) and (iv) and / or (v) is equal to 100 wt.%. If the sum is not equal to 100 wt.%, it will be clear to the skilled person that the composition comprises additional components.

[0102] If one or more additives (iv) are present, the one or more additives are preferably selected from the group consisting of colorants and pH adjusters. Additional fillers (v) are described in more detail below.

[0103] In yet another preferred embodiment, the anticorrosive composition comprises about 30 to about 70 wt.% of the amorphous polymer composition (i), about 30 to about 60 wt.% of the water-absorbing filler (ii), and about 0 to about 30 wt.% of the additional filler (v), all based on the total weight of the anticorrosive composition. More preferably, the composition comprises about 40 to about 70 wt.% of the amorphous polymer composition (i), about 30 to 60 wt.% of the water-absorbing filler (ii), and about 3 to about 20 wt.% of the additional filler (v), all based on the total weight of the anticorrosive composition. Even more preferably, the composition comprises about 40 to about 60 wt.% of the amorphous polymer composition (i), about 30 to 55 wt.% of the water-absorbing filler (ii), and about 5 to about 10 wt.% of the additional filler (v), all based on the total weight of the anticorrosive composition. Most preferably, the composition comprises about 40 to about 45 wt.% of the amorphous polymer composition (i), about 50 to 55 wt.% of the water-absorbing filler (ii), and about 5 to about 7 wt.% of the additional filler (v), all based on the total weight of the corrosion protection composition.

[0104] In one embodiment of the invention, the anticorrosive composition does not include any plasticizer. In one embodiment, the anticorrosive composition does not include petrolatum. In one embodiment, the anticorrosive composition does not include wax. In one embodiment, the anticorrosive composition does not include a surface tension modifier. In one embodiment, the anticorrosive composition does not include any combination of the above agents.

[0105] One property of the anticorrosion composition of the present invention is its ability to absorb water. The anticorrosion composition can absorb enough water from the surface of the article to be protected in a short time (i.e., within a few seconds / minutes to a few hours) to allow the anticorrosion composition of the present invention to quickly adhere to the surface of the article.

[0106] The water absorption of the anticorrosive composition of the present invention is determined by an immersion method based on ASTM standard D 570 "Standard test method for water absorption of plastics". The method is further adapted, i.e. the standard water absorption (in wt.%) and the water absorption of the anticorrosive composition are measured in grams of absorbed water per square meter (g / m2) using distilled water immersed for 72 hours at a temperature of 23±1°C. 2 As described in the Examples, the water absorption rate (g / m 2 ), w A (g / m 2 The determination of the α-amino acid sequence comprises the steps of: (1) weighing a cup having a known depth in the range of 15-25 mm, and a surface with a known diameter in the range of 30-50 mm (for circular surfaces) or a known length and width (for rectangular or square surfaces) to obtain a mass A (in grams; (g)); (2) filling a plastic cup completely with the composition, avoiding air pockets and smoothing the surface; (3) weighing the filled cup to obtain a mass B (in grams; (g)); (4) placing the filled cup into a container of distilled water maintained at a temperature of 23±1°C so as to completely submerge the cup; (5) placing the cup in a climate cabinet and maintaining the water temperature at 23±1°C for 72 hours; (6) after 72 hours, remove the cup from the container, dry its surface, and weigh the dried cup to obtain its mass C (in grams; (g)); (7) g / m 2 Water absorption rate (g / m 2 ) as follows:

number

[0107] When the thickness of the layer of the anticorrosion composition exceeds a certain minimum thickness, the water absorption rate of the layer is no longer dependent on the mass of the anticorrosion composition, but rather on the surface area of ​​the layer. Thus, the water absorption rate is preferably determined as the amount of water absorbed per surface area of ​​the layer of the anticorrosion composition in a certain time, i.e., the water absorption rate (g / m 2 )

[0108] When determining water absorption, ensure that the layer of the anticorrosive composition has a thickness greater than the minimum thickness and therefore the water absorption rate (g / m 2 Care should be taken to eliminate the effect of layer thickness on Water absorption rate of the anticorrosive composition (g / m 2 If the water absorption rate of the anticorrosion composition is too high, the composition may become weak, begin to lose its consistency, and may peel off easily from the surface.

[0109] In one embodiment, the corrosion protection composition of the present invention has a coating weight of about 100 to about 2,500 g / m 2 , about 100~2,000g / m 2 , about 100~1,600g / m 2 , about 100~1,400g / m 2 , about 100~1,200g / m 2 , or about 100 to about 1,000 g / m 2 In one embodiment, the corrosion protection composition has a water absorption rate of at least about 100 g / m 2 , at least about 150 g / m2 , at least about 200 g / m 2 , at least about 250 g / m 2 , or at least about 300 g / m 2 In one embodiment, the water absorption of the corrosion protection composition is about 1,500 g / m 2 Less than 2,000g / m 2 Less than 2,200g / m 2 Less than or equal to about 2,500 g / m 2 is less than.

[0110] An important characteristic of the anticorrosive composition of the present invention is its increased viscosity. The viscosity of the composition of the present invention is determined as described for the amorphous polymer above. In one embodiment, the viscosity is less than about 15,000. In one embodiment, the viscosity is less than about 10,000. In one embodiment, the viscosity is greater than about 4,300, greater than about 4,500, greater than about 5,000, greater than about 6,000, greater than about 7,000, greater than about 8,000, or greater than about 9,000. In one embodiment, the composition has a viscosity of 2.4 s at 70° C. 1 The composition has a viscosity of about 4,500 to about 15,000, more preferably about 6,000 to about 15,000, and even more preferably about 7,000 to about 15,000 at a shear rate of (Pa.s). In one embodiment, the viscosity of the composition is about 9,000 to about 11,000. In one embodiment, the viscosity of the composition is about 11,000 to 15,000.

[0111] Another advantage of the compositions of the present invention is that they have improved set with respect to the article to be protected, including improved deformability. Also, the compositions of the present invention have very good adhesion, i.e., very good adhesion to the surface of the article, regardless of whether the surface is dry, damp, wet, soaked, or submerged in water. Also, the compositions of the present invention have very high adhesive tack. For example, STOPAQ (登録商標)Not only is the adhesion of the compositions of the present invention to the surface to be protected improved as compared to Subsea Compound, but optimal adhesion of the compositions to the surface is achieved in a shorter time due to the improved adhesive tack of the compositions, especially at low temperatures.

[0112] The compositions of the invention do not harden and therefore remain flexible, are essentially impermeable to water, moisture, salts, etc., and are densely pore-rich. In one embodiment, the compositions are pastes or have a paste-like consistency. An additional very important feature of the anticorrosive compositions of the invention is that if a protective layer of the composition is mechanically deformed to a relatively small extent, for example by wave action, the damage is automatically repaired within a relatively short period of time due to the fluid-like and / or viscoelastic nature of the compositions of the invention. That is, the compositions have self-healing properties, and any deformation or damage is repaired as a result of the flow of the composition into holes or cavities caused by mechanical deformation or other stresses. Thus, a protective layer comprising the compositions of the invention is not only smooth when applied, but also, even if dents, marks, dents, cavities, etc. are caused by mechanical forces, they will disappear in time and the smooth surface of the protective layer will reappear. Due to this fluid-like nature, any protective layer comprising the compositions of the invention will not tear or break and will not accumulate internal stresses. The irregularities on the surface of the article are completely filled or surrounded by the anticorrosive compositions of the invention, whereas state-of-the-art materials often cause problems in such situations. The fluid-like and / or viscoelastic nature of the compositions of the present invention also means that they do not have a pot life, whereas protective coatings and curable resins known in the art need to be applied within a period of time.

[0113] The composition of the invention is (登録商標)Compared to Subsea Compound, improved protection against corrosion is obtained due to the fact that the composition of the invention not only prevents water from reaching the surface to be protected, but also minimizes the voids present between said surface and the layer of the anticorrosive composition. The problem solved by the invention is therefore to provide a means for protection against corrosion. The invention solves the problem, for example, by providing a composition for protection against corrosion of the articles of the invention.

[0114] Other advantages of the corrosion protection compositions of the present invention are their high chemical stability and resistance over a wide pH range, and their essentially absence of cathodic delamination or sub-creep corrosion (eg, caused by subfilm migration of water).

[0115] The composition of the present invention has very good thermal stability. According to the present invention, the composition can be used within an operating temperature range of about -20°C to about 70°C, about -20°C to about 90°C, about -30°C to about 80°C, about -40°C to about 90°C, or about -50°C to about 100°C. In one embodiment, the composition is used within an operating temperature range of about -20°C to about 70°C. In general, the minimum operating temperature depends on the glass transition temperature, while the maximum operating temperature depends on, for example, the T max The performance requirements depend on the adhesiveness at the interface and the adhesive strength.

[0116] When an article is partially submerged, such as a riser on an oil platform, the temperature above the water surface will generally be different than the temperature below the water surface. Due to the wide operating temperature range of the corrosion protection composition of the present invention, it is now possible to use the same corrosion protection composition for both the portion of the article that is submerged and the portion above the water surface.

[0117] The anticorrosive compositions of the present invention have a further important advantage: Most protective systems require the use of a primer before these systems can be applied to an article and obtain sufficient adhesion, especially in moist or wet environments (such as by immersion or submersion). The use of a primer is not required with the compositions of the present invention, which means that the compositions of the present invention can be applied for shorter periods of time, thereby making them cheaper to operate.

[0118] For example, a problem that arises when prior art coating systems are applied is that air bubbles can form in the coating, which easily burst, thereby resulting in pinholes and insufficient protection in the coating layer. The inventors have found that when the composition of the present invention is used, air bubbles present between the surface of the article and the protective layer of the composition of the present invention move away from the surface of the article and into the protective layer of the composition. Where the article is in contact with salt, e.g. sea water, salt crystals form on the surface of the metal article, which requires extensive cleaning, e.g. before the coating system is applied to said surface. In contrast, the composition of the present invention encapsulates the salt crystals, and removal of these crystals is not required. In the prior art protective systems, the need to have to remove the salt crystals is that these crystals are hygroscopic and absorb water that penetrates the protective layer. As a result, the salt crystals swell, thereby causing cracks in the protective layer, ultimately resulting in a deterioration of protection and corrosion. In fact, these salt crystals cause significant problems in the operation of the article, requiring state-of-the-art protective systems to be replaced periodically. However, the composition of the present invention does not suffer from such problems and is therefore much more economical for the end user.

[0119] The article protected by the composition of the present invention can be easily inspected, since the protective layer of the composition of the present invention can be easily removed and reapplied after inspection. Most materials according to the state of the art are more difficult to remove. Moreover, when removed, the surface of the metal article must be thoroughly cleaned, if possible, before such prior art materials are reapplied, since it is clear to those skilled in the art that the cured system applied in an uncured state cannot be reapplied. As a result, the protective layer of the composition of the present invention is also more easily tested.

[0120] 4.4 Fillers The composition of the present invention comprises one or more fillers. In one embodiment, the composition of the present invention comprises one or more water-absorbing fillers. In one embodiment, the composition of the present invention comprises one or more water-absorbing fillers and one or more inert fillers. The water-absorbing fillers may comprise two or more water-absorbing fillers and may be of organic and / or inorganic nature. The organic and / or inorganic water-absorbing fillers may be one or more polymeric water-absorbing fillers and / or one or more non-polymeric water-absorbing fillers. The composition of the present invention comprises any combination of one or more water-absorbing fillers, i.e. any combination of non-polymeric water-absorbing fillers, any combination of polymeric water-absorbing fillers, and any combination of non-polymeric and polymeric water-absorbing fillers.

[0121] The water absorption of the fillers is determined according to the procedure described in the standard EN-ISO10769:2011. The same procedure is applied here to measure the water absorption of different fillers. According to EN-ISO10769:2011, the water absorption of water-absorbing fillers is measured at ambient temperature, the test period is 24 hours.

[0122] The amount of water-absorbing filler present in the composition is determined, inter alia, by the water absorption rate w A When a water-absorbing filler with a lower water absorption rate is applied in the anticorrosion composition, the amount of said filler in the composition is generally higher than when a filler with a high water absorption rate is applied, in order to ensure sufficient water absorption of the anticorrosion composition. The water absorption rate of the filler depends, among other things, on the specific surface area, particle size and surface activity of the filler.

[0123] A wide variety of inorganic and organic water-absorbing fillers are known in the art, including silica, calcium oxide, clay minerals such as vermiculite and smectite, and water-absorbing polymers such as polyacrylamides, e.g., polymethyl acrylate. Water-absorbing polymers known in the art are described in more detail in, e.g., "Modern Superabsorbent Polymer Technology", F.L. Buchholtz and A.T. Graham, Wiley VCH, 1998, pp. 71-103.

[0124] In one embodiment, the non-polymeric water-absorbing filler comprises a mineral clay. Clay minerals are hydrous phyllosilicates, i.e., hydrous silicates of aluminum (Al), magnesium (Mg), potassium (K) or iron (Fe), and other less common elements. Clay minerals are known in the art and are described in Kirk-Othmer, "Encyclopedia of Chemical Technology", 4 thEd., John Wiley & Sons, New York 1993, Volume 6, pp. 383-423. Examples of clay minerals include vermiculite, kaolinite, and smectites such as montmorillonite and bentonite. In one embodiment, the water-absorbing filler comprises a hydrated aluminum silicate crystalline mineral, preferably kaolinite or kaolin (kaolin clay). The clay mineral may further comprise sodium bentonite clay, sodium montmorillonite clay, potassium bentonite clay, potassium montmorillonite clay, calcium bentonite clay, calcium montmorillonite clay, aluminum bentonite clay, a combination of two or more bentonite clays, a combination of two or more montmorillonite clays, or a combination of one or more bentonite clays and one or more montmorillonite clays. Additionally, the bentonite clay and / or montmorillonite clay may comprise a surface-modified bentonite clay. Preferably, the mineral clay comprises a bentonite clay, more preferably a sodium bentonite clay, for example, sodium bentonite has a water absorption rate in the range of about 330 wt.% to about 400 wt.%, and kaolin has a water absorption rate in the range of about 188 wt.% to about 212 wt.%, as determined by EN-ISO 10769:2011.

[0125] In one embodiment, the water-absorbing filler comprises a filler that binds water by chemical reaction, i.e., cement. In one embodiment, the cement is a sulfoaluminate cement. For example, the sulfoaluminate cement has a water absorption rate in the range of about 280 to about 298 wt.% as determined by EN-ISO 10769:2011. In one embodiment, the water-absorbing filler comprises a hydraulic cement. A hydraulic cement is a cement that hardens by reaction with water. Examples of hydraulic cements are Portland cement and Portland cement blends (e.g., Portland blast furnace cement or Portland fly ash cement), supersulfated cement, calcium aluminate cement, and calcium sulfoaluminate cement.

[0126] In one embodiment, the water-absorbing filler comprises silicon dioxide. In one embodiment, the water-absorbing filler comprises both a filler that binds water through a chemical reaction and silicon dioxide.

[0127] In one embodiment, the water-absorbing filler has a water absorption rate of about 20 wt.% or more, more preferably about 25 wt.% or more, even more preferably about 30 wt.% or more. In one embodiment, the water absorption rate of the water-absorbing filler is about 40 wt.% or more, about 50 wt.% or more, or about 70 wt.% or more. In one embodiment, the water absorption rate of the water-absorbing filler is about 100 wt.% or more. In one embodiment, the water absorption rate of the water-absorbing filler is about 150 wt.% or more, or about 200 wt.% or more. In one embodiment, the water-absorbing filler has a water absorption rate of about 20 wt.% to 400 wt.%, about 50 wt.% to 300 wt.%, about 100 wt.% to 300 wt.%, or about 100 wt.% to 400 wt.%.

[0128] Preferably, the anticorrosion composition comprises the non-polymeric water-absorbing filler in an amount of at least 30 wt.%, at least 40 wt.%, or at least 50 wt.%, based on the total weight of the composition. In one embodiment, the composition comprises the non-polymeric water-absorbing filler in an amount of about 30-60 wt.%, more preferably about 30-55 wt.%, even more preferably about 35-55 wt.%, and most preferably about 40-53 wt.%, all based on the total weight of the anticorrosion composition.

[0129] In one embodiment, the filler comprises an organic filler. The organic filler may be, but is not limited to, cellulose, polystyrene, polyvinyl chloride, polyethylene, polypropene, polyisoprene, rubber, polyamide and polyester or a mixture thereof. Polyethylene and polypropene may be present in the amorphous polymer composition that is part of the anticorrosive composition. In one embodiment, the organic filler is a polymeric filler. When the polymer is applied as a filler material, it does not have to meet, for example, the glass transition temperature or molecular weight requirements specified for the amorphous polymer composition. Syndiotactic polypropene with a glass transition temperature above -20°C can be used as a filler.

[0130] In one embodiment, the composition comprises a polymeric filler in an amount of at least about 0.1 wt.%, at least about 0.2 wt.%, at least about 0.3 wt.%, at least about 0.4 wt.%, at least about 0.5 wt.%, at least about 0.6 wt.%, at least about 0.7 wt.%, at least about 0.8 wt.%, at least about 0.9 wt.%, wt.%, at least about 1 wt.%, at least about 1.5 wt.%, or at least about 2.0 wt.%, based on the total weight of the composition. In one embodiment, the composition comprises a polymeric filler in an amount of about 0.1-10.0 wt.%, about 0.2-8.0 wt.%, about 0.3-6.0 wt.%, about 0.4-5.0 wt.%, or about 0.5-2.5 wt.%, based on the total weight of the composition.

[0131] In one embodiment, the composition comprises both at least one non-polymeric absorbent filler in the amount described above, and at least one polymeric water-absorbing filler in the amount described above.

[0132] In one embodiment, the filler comprises an inorganic filler. Examples of inorganic fillers are inorganic minerals, salts and / or oxides, such as calcium carbonate, calcium sulfate, aluminum hydroxide, aluminum oxide, magnesium oxide, silicon dioxide, titanium dioxide, ground quartz, glass, talc, slate and kaolin. In one embodiment, the filler comprises calcium carbonate. In one embodiment, the filler comprises kaolin. In one embodiment, the filler comprises calcium carbonate and kaolin. In one embodiment, the filler comprises calcium carbonate, kaolin and aluminate sulfocement.

[0133] The composition of the present invention may include one or more additional fillers, which may be organic, inorganic, or inert. In one embodiment, the additional filler is an organic filler. In one embodiment, the additional filler is an inorganic filler. In one embodiment, the additional filler is an inert filler, i.e., calcium carbonate. The one or more additional inert fillers may be present in an amount of 0 to about 10 wt.%, preferably about 0.5 to about 8 wt.%, more preferably about 1 to about 6 wt.%, all based on the total weight of the anticorrosive composition. In one embodiment, the additional inert filler is present in an amount of 0.5 wt.% or more, 1 wt.% or more, or 2 wt.% or more.

[0134] The total amount of fillers present in the anticorrosion composition, i.e. the total amount of the water-absorbing filler(s) and the optional additional filler(s), is in the range of 35-60 wt.%, preferably 40-59 wt.%, more preferably 45-58 wt.%, most preferably 50-58 wt.%, all relative to the total weight of the anticorrosion composition. In one embodiment, the total amount of fillers present in the anticorrosion composition is at least 30 wt.%, at least 40 wt.%, or at least 50 wt.%, all relative to the total weight of the anticorrosion composition.

[0135] The anticorrosion composition of the present invention preferably comprises about 30 to about 60 wt.% non-polymeric water-absorbing filler and about 0 wt.% additional filler, more preferably about 35 to 53 wt.% non-polymeric water-absorbing filler and about 2 to about 7 wt.% additional filler, even more preferably about 40 to 53 wt.% non-polymeric water-absorbing filler and about 3 to about 6 wt.% additional filler, and most preferably about 45 to 53 wt.% non-polymeric water-absorbing filler and about 4 to about 6 wt.% additional filler, all based on the total weight of the anticorrosion composition.

[0136] In one embodiment, the anticorrosive composition comprises about 0.1 to about 10.0 wt.% of the polymeric water-absorbing filler and about 0 wt.% of the additional filler, more preferably about 0.2 to about 8.0 wt.% of the polymeric water-absorbing filler and about 2 to about 7 wt.% of the additional filler, even more preferably about 0.3 to about 6.0 wt.% of the polymeric water-absorbing filler, about 3 to about 6 wt.% of the additional filler, most preferably about 0.4 to about 5.0 wt.% of the polymeric water-absorbing filler, and about 4.0 to about 6.0 wt.% of the additional filler, all based on the total weight of the anticorrosive composition. In one embodiment, the composition comprises about 0.1 to 10.0 wt.% of the polymeric water-absorbing filler, preferably 0.1 to 8 wt.% of the polymeric water-absorbing filler, more preferably 0.1 to 5 wt.% of the polymeric water-absorbing filler.

[0137] In one embodiment, mixtures of two or more of any of the above-mentioned fillers in any of the amounts described above are encompassed by the present invention.

[0138] 4.5 Antioxidants In one embodiment, the anticorrosive composition of the present invention comprises an antioxidant (iii). The antioxidant may be a primary or secondary antioxidant, a multifunctional antioxidant (i.e., an antioxidant combining primary and secondary antioxidant functionality) or a lactone. The antioxidant may comprise a combination of two or more antioxidants. In one embodiment, the anticorrosive composition comprises two antioxidants. In one embodiment, the anticorrosive composition comprises three antioxidants.

[0139] The optional antioxidant(s) may be present in an amount of about 0.05 to about 5 wt.%, preferably about 0.1 to about 4 wt.%, more preferably about 0.2 to about 3 wt.%, and most preferably about 0.3 to about 2 wt.%, based on the total weight of all compositions of the present invention. In one embodiment, the antioxidant(s) are present in an amount of about 0.1 wt.%, 0.2 wt.%, 0.3 wt.%, 0.4 wt.%, 0.5 wt.%, 0.6 wt.%, 0.7 wt.%, 0.8 wt.%, 0.9 wt.%, or 1 wt.%, based on the total weight of the compositions of the present invention. In one embodiment, the antioxidant(s) are present in an amount of about 0.3 wt.%.

[0140] According to the present invention, the primary antioxidant is preferably selected from the group consisting of sterically hindered phenolic compounds, sterically hindered alkylthiomethylphenol or arylthiomethylphenol compounds, and secondary aromatic amines. Such compounds are well known in the art and include the sterically hindered phenolic compound 2,6-di-t-butyl-4-methylphenol, Irganox (登録商標) 1330, Irganox (登録商標) 1010, Irganox (登録商標) 1098, Irganox (登録商標) 1076, Irganox (登録商標) 245, Irganox (登録商標) 259, Irganox (登録商標) 1035, Irganox (登録商標) 2246, Irganox (登録商標) 3114 and Irganox (登録商標) 3125, Sterically hindered alkylthiomethylphenols Irganox (登録商標) 1520, i.e. 2,4-di-octylthiomethyl-6-methylphenol, and (polymerized) 1,2-dihydro-2,2,4-trimethylquinoline, e.g. Agerite (登録商標) Contains secondary aromatic antioxidants including MA.

[0141] According to the invention, the secondary antioxidant is preferably selected from the group consisting of phosphites and thioesters. Suitable secondary antioxidants are, for example, Irgafos(登録商標) 168, Irgafos (登録商標) 12 and Irgafos (登録商標) P-EPQ (all phosphites), and Lowinox (登録商標) TBM-6, BNX (登録商標) DLTDP (CAS number 123-28-4) and Morstille 18 DSTDP (all thioesters).

[0142] The multifunctional antioxidant preferably contains primary and secondary antioxidant functions. An example of a multifunctional antioxidant is Irganox (登録商標) L 115 and Irganox (登録商標) The number is 565.

[0143] An example of a lactone that can be used as an antioxidant is Irganox (登録商標) It's the HP-136.

[0144] According to the present invention, the composition preferably comprises a primary antioxidant, which is preferably selected from the group of sterically hindered phenolic compounds and secondary aromatic amines, most preferably from the group of sterically hindered phenolic compounds.

[0145] The composition may comprise a secondary antioxidant, which is preferably selected from the group of the phosphites.

[0146] In one embodiment, the composition comprises a combination of a primary antioxidant and a secondary antioxidant, preferably a combination of a primary antioxidant and a secondary antioxidant having a synergistic effect. Suitable combinations include Irganox (登録商標) 1010 and Irgafos (登録商標) The number is 168.

[0147] In one embodiment, the composition comprises a combination of a primary antioxidant, a secondary antioxidant, and a lactone. In one embodiment, the lactone is Irganox (登録商標) It's the HP-136.

[0148] Further examples of primary antioxidants, secondary antioxidants, polyfunctional antioxidants and lactones are disclosed, for example, in WO 2005 / 005528.

[0149] 4.6 Method The present invention also relates to a method for the protection against corrosion of an article, in which the anticorrosive composition of the present invention is applied to the surface of the article. The present invention solves the problem by, for example, further providing a method for the protection against corrosion of the article to be protected.

[0150] The anticorrosive composition can be applied as a film, coating or cover. In one embodiment, the anticorrosive composition is applied in the form of a layer. The article can be in a dry, moist, wet, submerged or flooded environment during application of the layer of anticorrosive composition. In one embodiment, the article is in a wet environment during application of the layer of anticorrosive composition.

[0151] The present invention relates to a method for the protection against corrosion of an article, comprising the steps of: (a) (i) a vitreous silica having a glass transition temperature of −20° C. or less as determined by DSC and a molecular weight of 1,000 to 3,050,000 g mol-1, as determined by gel permeation chromatography; -1 and (ii) a water-absorbing filler having a water absorption percentage of 20 wt.% or more, as determined according to the procedure set forth in the EN-ISO 10769:2011 standard, the filler binding water by chemical reaction, wherein the composition comprises at least 30 wt.% amorphous polymer composition, based on the total weight of the composition, and the composition comprises (a) at least 30 wt.% non-polymeric water-absorbing filler, and / or (b) at least 0.1 wt.% polymeric water-absorbing filler, based on the total weight of all compositions; and (b) applying a mechanical protection layer over the layer of the corrosion protection composition.

[0152] The amorphous polymer may have a number average molecular weight M as described above for the amorphous polymer.n , viscosity average molecular weight (M v) or weight average molecular weight (M w) Similarly, the molecular weight distribution of an amorphous polymer is M w / M n is as stated above.

[0153] The present invention provides a method for protection against corrosion of an article, comprising, in the following order: (a) application of a layer of the corrosion protection composition of the present invention; and (b) application of a mechanical protective layer over the layer of corrosion protection composition; wherein the article is in a dry, moist, wet, submerged or water-filled environment during application of the layer of corrosion protection composition of the present invention.

[0154] In one embodiment, the article is in a moist or wet environment during step (a) of the method, i.e., during application of the layer of the corrosion protection composition to the surface of the article. In one embodiment, the article is in a dry environment during step (a) of the method. In one embodiment, the article is in an immersed or submerged environment. The layer of corrosion protection composition may be applied to the entire surface of the article, or to a portion of the surface.

[0155] Due to the improved setting of the corrosion protection composition of the present invention on the protected article, including improved deformation, very good adhesive tack and adhesion to the surface of the article, the method can be carried out while the article is in a wet environment, i.e., underwater, in the splash zone, etc. According to "Corrosion Control of Steel-Fixed Offshore Platforms Associated with Petroleum Production," NACE Standard RP 0176-03, NACE International, Houston, 2003, "splash zone" is defined as a zone (e.g., a zone of an offshore platform) that is alternately subjected to the influences of tides, waves, wind, and sea.

[0156] The invention is particularly concerned with the protection of said articles against corrosion. As a result, the article is preferably essentially composed of metal, in particular steel. Alternatively, the surface of the article may be essentially composed of metal, in particular steel, or concrete, while the interior of the article may comprise a different material. The method of the invention is particularly suitable for the protection against corrosion of lines or pipes for oil or gas, and risers of oil drilling and production rigs or platforms. However, the method of the invention also protects articles against mechanical external influences, such as vibrations and shocks caused by wave motions, for example.

[0157] The article protected by the method of the present invention may be in a wet or moist environment, for example a marine environment. In this specification, an article in a wet environment is defined as an article whose surface, or a part thereof, is wet, i.e., water is present on the surface, or a part thereof, or the surface of the article is located below the water level. An article in a wet environment is defined as an article whose surface, or a part thereof, is slightly or moderately wet.

[0158] The article may be fully or partially submerged in water, for example a pipeline for oil or gas underwater, a riser of a drilling or production rig or platform, or an article located in a so-called splash zone which is (partially) above the water surface but may be wetted due to wave or tidal action, etc. In one embodiment, the article in a wet environment is an underwater article, such as a pipe or line for oil or gas located below the water surface. In one embodiment, the article in a wet environment is a partially submerged article, such as a riser of an oil drilling or production rig or platform located at sea, or a pipe or line for oil which is partially below the water surface. In another embodiment, the article in a wet environment is an article located in a splash zone.

[0159] Alternatively, the article may be in a wet environment due to condensation from the environment on the surface of the article, resulting in the presence of water on the surface of the article or a portion thereof. An example of such an article is a sweating pipeline, i.e. a pipeline or gutter on a surface on which water is present due to condensation from the environment. In one embodiment, the article in a wet environment is a sweating pipeline or gutter.

[0160] The article protected by the method of the present invention may be in a dry environment, which is defined herein as an article, the surface of which or any part of which is not under or under water, free or relatively free of liquids, in particular water.

[0161] The first step (a) of the method of the present invention comprises applying a layer of the anticorrosive composition of the present invention to a surface of an article. In one embodiment, the anticorrosive composition is applied to the surface, or a part thereof, while it is wet or moist, i.e. while water is present on the surface, or a part thereof, during the performance of step (a) of the method. In one embodiment, the anticorrosive composition is applied to the surface, or a part thereof, while it is dry, i.e. while water is not present on the surface, or a part thereof, during the performance of step (a) of the method. In one embodiment, the anticorrosive composition is applied to the surface, or a part thereof, while the humidity of the surface, or a part thereof, is different in different parts of the surface, i.e. some parts of the surface may be dry and other parts of the surface may be wet and / or moist. For example, the anticorrosive composition of the present invention can be used on an oil rig or oil rig. Parts of such rigs are exposed to different environmental conditions.

[0162] In contrast to the methods known from the prior art, the anticorrosive composition of the present invention can be applied directly to the surface of the article.

[0163] The method of the present invention can be carried out on an article without the need to isolate the article from a moist or wet environment when the article is actually located in the moist or wet environment. In one embodiment, the method is carried out underwater to protect the submerged article. Drying of the surface of the article before application of the composition of the present invention in step (a) of the method is not required. In one embodiment, the method is carried out above water. In one embodiment, the method is carried out on a dry surface of the article.

[0164] Extensive pretreatment of the surface of the article is generally not necessary in the method of the present invention. For example, when protecting an article, such as a water-submerged article, the methods known in the art often require constructing a casing around the article and removing the water present in the casing. The surface of the article must then be subjected to extensive pretreatment, for example by sandblasting, in order to prepare the surface of the article. These time-consuming and expensive steps are not necessary in the method of the present invention, and surface pretreatment is minimized or not required at all.

[0165] The second step (b) of the method of the present invention involves the application of a compressible and flexible mechanical protection layer. The mechanical protection layer is applied over the layer of the anticorrosive composition of the present invention, completely covering said layer. Applying a mechanical protection layer "over" a layer of anticorrosive composition means that the mechanical protection layer is located on the side of the layer of anticorrosive composition opposite the side of said layer of anticorrosive composition that is in contact with the surface of the article to be protected. In one embodiment, the mechanical protection layer is in direct contact with the layer of anticorrosive composition. In one embodiment, there may be additional intermittent layers between the layer of anticorrosive composition and the mechanical protection layer. The function of the mechanical protection layer is to protect the layer of the composition of the present invention applied in step (a) of the method. Moreover, said mechanical protection layer minimizes voids that are eventually present under the corrosion protection layer, allows a self-healing effect by generating prestress in the material, and prevents the anticorrosive composition from being overexposed to water, which may result in degradation of the composition over time.

[0166] The mechanical protection layer may be applied in the form of a tape. Examples of mechanical protection layers include polymer (multilayer) films, including, for example, polyethylene, polypropene, polyvinyl chloride, polyester, epoxy, polyurethane or aramid. The polymer film may be laminated with reinforcing fibers, such as, for example, glass fibers or carbon fibers. A suitable protection layer is provided, for example, by high-shear tape. High-shear tape is well known in the art and is disclosed, for example, in US Pat. No. 5,817,413 and US Pat. No. 6,033,776.

[0167] When mechanical protective layer is stressed on the substrate containing the protective layer of the composition of the present invention, or when mechanical protective layer is contracted around the substrate, for example, a pipe, a self-repairing effect can be obtained, whereby the defects of the protective layer are repaired over time.The protective layer then exerts a continuous stress on the layer of the composition of the present invention.When the protective layer is slightly damaged, this stress ensures the flow of the composition of the present invention toward the damaged site, resulting in the covering of any exposed surface of the underlying substrate.

[0168] An example of a suitable mechanical protection layer is a fiberglass-reinforced polyurea layer. Such a protection layer acts as a rigid mechanical reinforcement for the layer of anticorrosive composition, protecting it from impacts and dents, for example from driftwood, boat landings, etc. In a preferred embodiment, a watertight layer is applied on top of the mechanical protection layer. In another preferred embodiment, the mechanical protection layer is itself a watertight layer. In another preferred embodiment, two different layers are applied on top of the layer of anticorrosive composition, the first layer, i.e. the layer that is in direct contact with the layer of anticorrosive composition, is a flexible tape, and the second layer, i.e. the layer that is in direct contact with the flexible tape, is an additional rigid mechanical layer, for example of fiberglass-reinforced polyurea.

[0169] The method may also be carried out by applying a tape of the invention comprising a layer of the anticorrosive composition of the invention to the surface of the article. The invention therefore further relates to a method of the invention, in which in step (a) a tape is applied to the surface of the article, the tape comprising a layer comprising the anticorrosive composition of the invention. The anticorrosive composition of the invention is described in detail above.

[0170] In one embodiment, the method comprises, in the following order: (a) applying a tape of the present invention; and (b) applying a mechanical protective layer over the layer of anticorrosive composition. In another embodiment, the method comprises, in the following order: (a) applying a tape of the present invention; and (b) applying a mechanical protective layer over the layer of anticorrosive composition, the article being in a dry or wet environment during application of the tape (a) or layer (b).

[0171] A mechanical protection layer for protecting the layer of the composition of the invention may be included in the tape, in which case step (b) of the method of the invention is also carried out by application of said tape to the surface of the article, and thus steps (a) and (b) of the method of the invention are then carried out simultaneously.

[0172] 4.7 Tape The present invention also relates to a tape for the protection of articles against corrosion, comprising a layer comprising the anticorrosive composition of the present invention.The present invention therefore also solves a problem by providing a tape for the protection of articles against corrosion.

[0173] 1. A tape comprising a layer comprising a corrosion protection composition, the tape having (i) a glass transition temperature of −20° C. or less as determined by DSC and a glass transition temperature of 1,000 to 3,050,000 g mol as determined by gel permeation chromatography. -1and (ii) a water-absorbing filler having a water absorption rate of 20 wt.% or more, as determined according to the procedure set forth in the EN-ISO 10769:2011 standard, comprising a filler that binds water by a chemical reaction, wherein the composition comprises at least 30 wt.% amorphous polymer composition, based on the total weight of the composition, and wherein the composition comprises a) at least 30 wt.% non-polymeric water-absorbing filler, and / or (b) at least 0.1 wt.% polymeric water-absorbing filler, based on the total weight of the composition.

[0174] In a preferred embodiment of the tape of the present invention, the amorphous polymer is (a) from about 50.0% by weight to about 98% by weight of isobutene and from about 2% to about 50.0% of C2 to C3 other than isobutene, based on the total weight of the polymer 12 Alkenes, C4-C 12 Polymers containing alkadienes, or mixtures thereof; (b) a polymer comprising greater than about 98% by weight to about 100% by weight of isobutene, based on the total weight of the polymer; (c) about 50.0% by weight to about 99.9% by weight of propene and about 0.1% by weight to about 50.0% by weight of C2 to C3 other than propene, based on the total weight of the polymer 12 Alkenes, C4-C 12 an alkadiene, or a mixture thereof, or a polymer containing about 100 wt.% propene; (d) from about 0.1% by weight to about 50.0% by weight of ethene and from about 50.0% by weight to about 99.9% by weight of C2 to C3 other than ethene, based on the total weight of the polymer 12 Alkenes, C4-C 12 Polymers containing alkadienes, or mixtures thereof; (e) about 0.1% by weight to about 50.0% by weight of 2-methyl-1-pentene and about 50.0% by weight to about 99.9% by weight of C2-C3-C4-C6-methyl-1-pentene other than 2-methyl-1-pentene, based on the total weight of the polymer 12 Alkenes, C4-C 12alkadienes, or mixtures thereof, or polymers containing about 100 wt.% 2-methyl-1-pentene; and (f) a mixture of (a), (b), (c), (d) and / or (e). is selected from the group consisting of:

[0175] In a preferred embodiment, the amorphous polymer is selected from the group consisting of (a) and (b), and mixtures thereof.

[0176] The amorphous polymers have a number average molecular weight (M) as described above for the amorphous polymers. n ), viscosity average molecular weight M v or weight average molecular weight M w Similarly, the molecular weight distribution of an amorphous polymer is M w / M n is as stated above.

[0177] In one embodiment, the tape is applied to the article to be protected while the article is in a dry environment. In one embodiment, the tape is applied to the article while the article is in a wet or moist environment. In other words, the tape can be applied to the surface of the article while the surface or a part of the article is wet or moist during the application of the tape, i.e. while water is present on the surface or a part of the article. Therefore, it is not necessary to dry the surface of the article before the application of the tape. The tape can be applied directly to (partially) submerged articles, articles in splash zones, or articles having a wet surface due to condensation of moisture on the surface of the article, such as a sweating pipeline. The surface of the article to be protected generally does not require extensive pretreatment. The tape can be easily applied to the article to be protected against corrosion, since the layer of the composition of the present invention can be easily deformed. Moreover, after being applied, the tape can be easily removed. Although the cohesive failure leaves some residue on the surface of the metal article, these residues can be easily removed by scraping. The tape of the invention can be used to repair damaged or corroded metal articles that have already been provided with some state-of-the-art protective material, provided that the surface of the metal article has been cleaned to the St-2 level according to ISO standard 8501-1. Finally, as mentioned above, the tape has self-healing properties due to the fluid and / or viscoelastic nature of the layer of the anticorrosive composition of the invention.

[0178] In one embodiment, the tape may be applied while portions of the article are in a wet or moist environment and other portions of the article are in a dry environment.

[0179] In one embodiment, the tape comprises an additional layer (b) for protecting layer (a). The additional layer (b) may be a mechanical protection layer. When such a protection layer (b) is transported, the tape can be easily wound on a bobbin or spool or other suitable means, and the layers of the tape can be prevented from adhering to each other. The protection layer accelerates the completion of the adhesion of the composition to the substrate of the tubular object, because such a mechanical protection layer is wrapped in tension.

[0180] Provided herein is a tape comprising the corrosion protection composition of the present invention. According to the present invention, the tape has (i) a glass transition temperature of −20° C. or less as determined by DSC, and a viscosity of 1,000 to 3,050,000 g mol-1 as determined by gel permeation chromatography. -1 and (ii) a water-absorbing filler having a water absorption rate of 20 wt.% or more, as determined according to the procedure described in the EN-ISO10769:2011 standard, the filler binding water by chemical reaction, the first layer comprising a corrosion protection composition comprising a water-absorbing filler, the water-absorbing filler having a water absorption rate of 20 wt.% or more, as determined according to the procedure described in the EN-ISO10769:2011 standard, the first layer comprising a water-absorbing filler, the water-absorbing filler having a water absorption rate of 20 wt.% or more, as determined according to the procedure described in the EN-ISO10769:2011 standard, the first layer comprising a water-absorbing filler, the water-absorbing filler having a water absorption rate of 20 wt.% or more, the water-absorbing filler binding water by chemical reaction, the first layer comprising a water-absorbing filler having a water absorption rate of 20 wt.% or more, as determined according to the procedure described in the EN-ISO10769:2011 standard, the first layer comprising a ... the water-absorbing filler binding water by chemical reaction, the first layer comprising a water-absorbing filler having a water absorption rate of 20 wt.% or more, the water-absorbing filler binding water by chemical reaction, the first layer comprising a water-absorbing filler having a water absorption rate of 20 wt.% or more, the water-absorbing fill In one embodiment, the composition comprises about 30 to about 70 wt.%, about 30 to about 60 wt.%, about 40 to about 50 wt.%, about 40 to about 60 wt.%, or about 40 to about 70 wt.% of the amorphous polymer composition, based on the total weight of the composition.

[0181] The amorphous polymer may have a number average molecular weight as described above for the amorphous polymer. (Mn) , viscosity average molecular weight (M v) or weight average molecular weight (M w) Similarly, the molecular weight distribution of an amorphous polymer is M w / M n is as stated above.

[0182] Layer (b) may have the function of a release liner that is removed from the tape during application of the tape. Layer (b) is then removed from the tape by any suitable material for release liner, such as paper, C2-C 20Layer (b) may comprise an alkene polymer or copolymer, or the like. Alternatively, layer (b) may comprise a polyvinyl chloride film with a siliconized outer surface. When such layer (b) is present, the presence of an additional release liner is not necessary. Moreover, said layer also functions as a separation layer to enhance ease of application and as a layer that allows proper adhesion of the subsequently applied mechanical protection layer.

[0183] In a specific embodiment, the tape comprises a further layer (c), which preferably comprises one or more of C2 to C4, as described in more detail below. 20 These include films comprising polymers or copolymers of alpha-alkenes and / or alkadienes, polyvinyl chloride (PVC), polyurethane, or nonwoven polyester cloth.

[0184] Layer (c), if present, is located on the other side of layer (a) than the side on which layer (b) is located. The order of layers in the tape is (b)-(a)-(c), with layer (a) disposed between (b) and (c) and layer (b) facing the environment. The invention also relates to a polymeric material having (i) a glass transition temperature of -20°C or less as determined by DSC and a molecular weight of 1,000 to 3,050,000 g mol as determined by gel permeation chromatography. -1 and (ii) a corrosion protection composition comprising a water-absorbing filler, the water-absorbing filler having a water absorption rate of 20 wt.% or more, as determined according to the procedure described in the EN-ISO 10769:2011 standard, the filler binding water by chemical reaction, the composition comprising at least 30 wt.% amorphous polymer composition, based on the total weight of the composition, the composition comprising a) at least 30 wt.% non-polymeric water-absorbing filler, and / or (b) at least 0.1 wt.% polymeric water-absorbing filler, based on the total weight of the composition, and (b) a second layer for protecting layer (a), and (c) one or more C2-C 20The tape includes a layer including a film including a polymer or copolymer of α-alkenes and / or alkadiene, polyvinyl chloride (PVC), polyurethane, or nonwoven polyester cloth. The layer (c) functions as a separation layer to enhance ease of application, but also as a layer that allows proper adhesion of a subsequently applied mechanical protection layer. In one embodiment, the composition includes at least 40 wt.%, at least 50 wt.%, at least 60 wt.%, or at least 70 wt.% of the amorphous polymer composition, based on the total weight of the composition. In one embodiment, the composition includes about 30 to about 70 wt.%, about 30 to about 60 wt.%, about 40 to about 50 wt.%, about 40 to about 60 wt.%, or about 40 to about 70 wt.% of the amorphous polymer composition, based on the total weight of the composition.

[0185] Preferably, the tape has a component (d) that includes a reinforcing net-like structure embedded in layer (a) and preferably having a woven, knitted or spool knit structure that can be deformed in two orthogonal directions. The reinforcing net-like structure can be made, for example, from polyester or from polyolefin fibers, for example, fibers composed of ethane homopolymers or copolymers or propene homopolymers or copolymers, as is well known in the art. The invention also relates to a reinforcing net-like structure having (i) a glass transition temperature of -20°C or less, as determined by DSC, and a molecular weight of 1,000 to 3,050,000 g mol, as determined by gel permeation chromatography. -1and (ii) a water-absorbing filler having a water absorption percentage of 20 wt.% or more, as determined according to the procedure set forth in the EN-ISO 10769:2011 standard, the filler binding water by chemical reaction, wherein the corrosion protection composition comprises at least 30 wt.% amorphous polymer composition, based on the total weight of the corrosion protection composition, and the corrosion protection composition comprises: a) at least 30 wt.% non-polymeric water-absorbing filler, and / or (b) at least 0.1 wt.% polymeric water-absorbing filler, based on the total weight of the corrosion protection composition; (b) a second layer for protecting layer (a); and (c) optionally one or more C2-C 20 The tape includes a layer including a film including a polymer or copolymer of α-alkene and / or alkadiene, polyvinyl chloride (PVC), polyurethane, or non-woven polyester cloth, and (d) a reinforcing net-like structure embedded in layer (a). Thus, in the tape, the layers are arranged in the order (b)-[(a)+(d)], with layer (b) facing the environment. Thus, when layer (c) is present, the order of layers in the tape is (b)-[(a)+(d)]-(c), with layer (b) facing the environment. In one embodiment, the composition includes at least 40 wt.%, at least 50 wt.%, at least 60 wt.%, or at least 70 wt.% of the amorphous polymer composition based on the total weight of the composition. In one embodiment, the composition comprises about 30 to about 70 wt.%, about 30 to about 60 wt.%, about 40 to about 50 wt.%, about 40 to about 60 wt.%, or about 40 to about 70 wt.% of the amorphous polymer composition, based on the total weight of the composition.

[0186] The layer (c) of the tape is preferably one or more of C2 to C 20-Alkenes and / or dialkenes polymers or copolymers, polyvinyl chloride (PVC), polyurethane, or films comprising nonwoven polyester cloth. Examples of such polymers and copolymers are EP(D)M elastomers, ethylene homopolymers, ethylene-α-alkene copolymers, propylene homopolymers and propylene-α-alkene copolymers, especially propylene-ethylene copolymers which may contain a large amount of propylene, e.g., 80 wt.% propylene based on the total weight of the copolymer, or a small amount of propylene, e.g., less than 20 wt.% propylene based on the total weight of the copolymer. When the copolymer is an ethylene copolymer, which is a preferred embodiment of the present invention, the C2-C 20 The α-alkene is preferably a C3-C 12 The α-alkenes are preferably α-alkenes, in particular C3-C8 α-alkenes. Examples of suitable α-alkenes are propene, 1-butene, 1-hexene and 1-octene. The ethylene copolymers preferably contain 0.1 to 30 wt.%, in particular 0.1 to 20 wt.%, of α-alkenes. The density of the ethylene homopolymers or ethylene polymers (measured according to ASTM D 1248) is preferably 0.800 to 0.975 g / cm. 3 , especially 0.850~0.950g / cm 3 The melt index (measured according to ASTM D 1238) of the ethylene homopolymer or ethylene copolymer is preferably between 0.1 and 50 g / min, in particular between 0.2 and 20 g / min. Layer (c) of the tape preferably comprises one or more of the following polymers: low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), ethene propene copolymer, ethene propene diene copolymer. According to a preferred embodiment of the invention, layer (c) of the tape comprises LDPE, HDPE or LLDPE or a combination thereof. It is further preferred that the material used for layer (c) is produced in a metallocene catalyzed polymerization process.

[0187] Layer (c) may comprise more than one layer, for example a multi-layer film comprising an outer LLDPE layer and an inner HDPE layer. Such multi-layer films are well known in the art. Layer (c) may further comprise different additives such as pigments and fillers.

[0188] In addition to the layers discussed above, the tapes of the present invention may include one or more additional layers that may provide additional properties to the tapes of the present invention.

[0189] The tape of the present invention preferably has a total thickness of about 1 to about 20 mm, more preferably about 1 to about 15 mm, even more preferably about 1 to about 10 mm, and most preferably about 1 to about 7 mm. The width of the tape can obviously be adjusted as desired or appropriate, but is preferably about 2.0 to about 100.0 cm, more preferably about 2.5 to about 75.0 cm, even more preferably about 3.0 to about 70.0 cm, even more preferably about 4.0 to about 65.0 cm, and most preferably about 5.0 to about 60.0 cm. The length of the tape can obviously also be adjusted as desired or appropriate. Before use, the tape may be wound, for example, to a length of several meters, on a bobbin or spool. However, the tape may be in the form of a sheet. The length and width of the sheet can be adjusted as desired or appropriate.

[0190] The thickness of the layer (c) is preferably from about 10 μm to about 500 μm, more preferably from about 20 μm to about 300 μm.

[0191] The present invention also relates to a method for protecting an article against corrosion comprising applying the tape of the present invention to a surface of the article. In one embodiment, the tape is applied to the article in a moist or wet environment. In one embodiment, the tape is applied to the article in a dry environment. In one embodiment, the tape is applied to the article in a dry moist or wet environment.

[0192] The present invention further relates to a tape according to the invention, in which the composition of the present invention is laminated onto a film, said film preferably comprising one or more of the layers C2 to C4 defined above for layer (c) of the tape of the present invention. 20 The present invention relates to a method for making a tape for protecting an article against corrosion comprising a polymer or copolymer of an alpha-alkene and / or alkadiene, polyvinyl chloride (PVC), polyurethane, or non-woven polyester cloth.

[0193] After the lamination step, the surface of layer (a) not in contact with layer (c) is preferably protected by layer (b), which may be any suitable material including, for example, an alkene polymer or copolymer, paper, etc. Optionally, component (d) is present embedded in layer (a) as described above.

[0194] After the tape is manufactured, it is preferably wound around a bobbin, spool, or similar suitable means for easy transportation to the location where the tape is to be used.

[0195] Finally, the inventors have noted that in tapes known in the art, corrosion occurs in the overlap areas between different windings ("spiral corrosion"), due to the fact that in these overlap areas the rather stiff windings are not in close contact and water blockage occurs. However, such a problem does not occur in the tapes of the present invention, due to the fluid and / or viscoelastic nature of layer (a) and because the composition is capable of absorbing water.

[0196] 4.8 Protective articles The present invention further relates to an article obtainable by the method of the present invention. Provided herein is an article comprising (a) (i) a layer of the anticorrosive composition of the present invention, and (ii) a mechanical protection layer for protecting said layer of said composition, or (b) a tape of the present invention. In one embodiment, the article comprises an additional layer. In one embodiment, one or more layers are water-permeable. In one embodiment, one or more layers are water-tight. In one embodiment, the mechanical protection layer (b) is water-tight.

[0197] The mechanical protection layer (b) is applied on top of the layer of the anticorrosive layer (a) and completely covers it. The mechanical protection layer (b) may be applied separately to the article of the present invention. A suitable protection layer is provided, for example, by a high-shear tape, which is well known in the art. High-shear tapes are disclosed, for example, in US Pat. No. 5,817,413 and US Pat. No. 6,033,776.

[0198] A layer (a) of the anticorrosive composition of the invention may be included in the tape of the invention. A mechanical protection layer (b) may also be included in the tape. In one embodiment, an article comprises one or more tapes of the invention, in which a surface of the article is covered by the tape.

[0199] In a preferred embodiment, the article consists essentially of metal, particularly steel, or concrete. Alternatively, the surface of the article may consist essentially of metal, particularly steel, or concrete, while the interior of the article comprises a different material. The article may be, for example, a tubular article, such as a pipe or line for gas or oil. The article may also be a riser of an oil drilling or production rig or platform, for example a pillar foundation or pier of a bridge, a buttress foundation of a dam, a concrete wall, etc. Particular embodiments of the invention are more fully described by the following examples. EXAMPLES

[0200] 5. Working Example 5.1 Anticorrosive composition A composition according to the invention (Table 1) was prepared by mixing the ingredients in a paddle mixer at 90°C. [Table 1]

[0201] 5.2 Water absorption rate of anticorrosive composition The water absorption of the anticorrosion composition is determined using a procedure according to ASTM D 570 adapted for the anticorrosion composition.

[0202] A plastic cup with a known depth in the range of 15-25 mm and a known diameter in the range of 30-50 mm (for circular surfaces) or a surface with a known length and width (for rectangular or square surfaces) is weighed (mass A). Here, a round-bottomed cup with a depth of 20 mm and a diameter of 44 mm was used. The cup is completely filled with the anticorrosive composition, avoiding air entrapment. The surface is smoothed using a putty knife. The cup filled with the anticorrosive composition is weighed (mass B).

[0203] The filled cup is then placed in a container of distilled water maintained at a temperature of 23±1° C. The filled cup should be completely submerged. The container containing the cup is then placed in a climate cabinet and the water temperature is maintained at 23±1° C. for 72 hours. After 72 hours of immersion, the cup is removed from the container, its surface is dried with tissue paper and the dry cup is weighed (mass C).

[0204] Water absorption is expressed in wt.% and is calculated as follows:

number

[0205] Water absorption rate (g / m 2 ) is calculated as follows:

number

[0206] As known to those skilled in the art, the method of calculating the surface of the cup depends on the shape of the surface. A circular surface is calculated by πr 2 where r is the radius of the circle and the square surface is equal to l*w, where l is the length of the surface and w is the width of the surface.

[0207] Water absorption rate (g / m 2 As long as the cup depth used to determine the water absorption rate (g / m) is greater than the minimum depth as described above, the water absorption rate (g / m) determined in this manner will be 2 ) is the water absorption rate (g / m 2The mass of corrosion inhibitor composition (BA) used in determining the corrosion inhibitor mass (BA) is irrelevant.

[0208] The water absorption (g / m) of an exemplary composition (B) of the present invention, which comprises 42 wt.% polyisobutene, 6 wt.% non-water-absorbing filler (calcium carbonate), 20 wt.% reversibly water-absorbing filler, 31 wt.% irreversibly water-binding filler, 0.3 wt.% antioxidant A, 0.3 wt.% antioxidant B, and 0.3 wt.% pigment, is shown in Table 1. 2 ), w A (g / m 2 ) was determined according to the procedure described above. The water absorption rate (g / m2) of the composition of the present invention determined after immersion in distilled water at 23±1° C. for 72 hours 2 ) is about 150 to 400 g / m 2 (See Table 2).

[0209] 5.3 Viscosity of the anticorrosive composition The composition of the present invention, which contains 42 wt.% polyisobutene, 6 wt.% non-water-absorbing filler (calcium carbonate), 20 wt.% reversibly water-binding filler, 31 wt.% irreversibly water-absorbing filler, 0.3 wt.% antioxidant A, 0.3 wt.% antioxidant B, and 0.3 wt.% pigment, has a melting point of 2.4 s at 70°C. -1 The viscosity at shear rate in (Pa.s) was determined as described in ISO 3219.

[0210] The viscosity of the compositions of the present invention ranged from about 9000 to about 11000 Pa.s (see Table 2). [Table 2] The compositions of the present invention exhibited improved viscosity and water absorption properties at 70°C.

[0211] 5.4 Adhesion of anticorrosive compositions The adhesion of the coatings applied to the surfaces of dry and wet pipes was tested according to the peel strength test as described in ISO21809-3 (2016) Annex H, M.3 and I. The peel strength was measured and the specimens were then inspected for the occurrence of cohesive failure (desired property), the absence of adhesive failure and the remaining of the film on the substrate. The products were applied to dry derusted carbon steel St2 / St3 cleanliness grade (see Table 3) or wet derusted carbon steel St2 / St3 cleanliness grade immersed in a 3% NaCl solution (see Table 4). [Table 3] [Table 4] The results in Tables 3 and 4 show the improved adhesion properties of the anticorrosive composition of the present invention to dry and wet surfaces compared to composition (A).

[0212] The adhesion of the coatings applied to dry and wet existing neoprene surfaces was tested according to the peel strength test described above. The peel strength was measured and the specimens were then inspected as described above. The products were applied to dry existing neoprene coatings (see Table 5) or wet existing neoprene coatings and immersed in a 3% NaCl solution (see Table 6). [Table 5] [Table 6] The results in Tables 5 and 6 show the improved adhesion properties of the corrosion protection compositions to existing dry and wet neoprene coatings.

[0213] 5.5 Drip resistance of anticorrosive compositions The drip resistance test was performed at various elevated temperatures in accordance with ISO 201809-3 (2016) Annex K. The data show that the drip resistance of the anticorrosive composition of the present invention is T max The results show that no thermal expansion was observed at +20° C. (minimum 80° C.) The performance parameters of the compositions in tape form were tested and the results of the comparative testing with Compound A are summarized in Table 7. [Table 7] The results in Table 7 show that the corrosion protection compositions of the present invention exhibit improved drip resistance.

[0214] 5.6 Specific Electrical Insulation Resistance and Cathodic Disbondment Resistance of Anticorrosive Compositions The specific electrical insulation resistance and cathodic disbondment resistance were determined for the anticorrosive compositions as shown below. The anticorrosive compositions were compared to a state of the art composition (A). The results are summarized in Table 8. [Table 8] The results in Table 8 show that the corrosion protection composition of the present invention has sufficient specific electrical insulation resistance and cathodic disbondment resistance.

Claims

1. A composition for the protection of an article against corrosion, (i) When determined by differential scanning calorimetry (DSC), it has a glass transition temperature of -20 °C or lower, and when determined by gel permeation chromatography, it has an average molecular weight in the range of 1,000 to 3,050,000 g / mol －１ An amorphous polymer composition containing an amorphous polymer having an average molecular weight in the range of, and wherein when determined according to the procedure described in EN-ISO 10769:2011 standard, it contains a water-absorbing filler having a water absorption rate of 20 wt.% or more, and the filler that combines with water by chemical reaction, wherein it contains at least 30 wt.% of the amorphous polymer composition, based on the total weight of the composition, based on the total weight of all the compositions, (a) at least 30 wt.% of a non-polymer water-absorbing filler, and / or (b) at least 0.1 wt.% of a polymer water-absorbing filler,

2. The composition for the protection against corrosion according to claim 1, wherein it contains 30 to 70 wt.% of the amorphous polymer composition, based on the total weight of the composition.

3. Based on the total weight of all the compositions, about (a) 30 to 60 wt.% of the non-polymer water-absorbing filler, and / or (b) 0.1 to 10 wt.% of the polymer water-absorbing filler The composition for the protection against corrosion according to claim 1.

4. Water absorption rate (g / m) at 23°C for 72 hours is ２ ), w ２ (g / m Ａ ), is less than 2000, and w ２ (g / m Ａ ), is ２ ​ (1) Weighing a cup having a surface with a known depth in the range of 15 to 25 mm and a known diameter (circular surface) in the range of 30 to 50 mm or a known length and width (rectangular or square surface) to obtain a mass A (g); (2) Completely filling the plastic cup with the composition, avoiding air pockets and smoothing the surface; (3) Weighing the filled cup to obtain a mass B (g); (4) Placing the filled cup into a container of distilled water maintained at a temperature of 23 ± 1 °C and completely submerging the cup; (5) Placing the cup in a climate cabinet and maintaining the water temperature at 23 ± 1 °C for 72 hours; (6) After 72 hours, taking the cup out of the container, drying its surface, and weighing the dried cup to obtain a mass C (g); (7) The water absorption rate (g / m2) expressed in g / m2 is as follows: 【Number 1】 Calculating as such,

5. At 70 °C for 2.4 s －１ The composition according to claim 1, wherein the viscosity at a shear rate of －１ (Pa·s) is between 6000 and 15000, and the viscosity is determined according to the procedure described in standard EN-ISO 3219.

6. The amorphous polymer is (a) Based on the total weight of the polymer, about 50.0 wt% to about 98 wt% of isobutene and about 2 wt% to about 50.0 wt% of C other than isobutene ２ ~C １２ alkene, C ４ ~C １２ alkadiene, or a polymer containing a mixture thereof (b) a polymer containing about more than 98 wt.% to about 100 wt.% of isobutene, based on the total weight of the polymer, (c) About 50.0 wt% to about 99.9 wt% propene and about 0.1% to about 50.0% C other than propene, based on the total weight of the polymer ２ -C １２ -alkene, C ４ -C １２ -alkadiene, or a mixture thereof, or a polymer containing about 100 wt.% propene (d) About 0.1 wt% to about 50.0 wt% of ethene and about 50.0% to about 99.9% of C other than ethene, based on the total weight of the polymer ２ ~C １２ alkene, C ４ ~C １２ a polymer containing an alkadiene, or a mixture thereof (e) From about 0.1 wt% to about 50.0 wt% of 2-methyl-1-pentene and from about 50.0% to about 99.9% of C other than 2-methyl-1-pentene based on the total weight of the polymer ２ to C １２ alkene, C ４ to C １２ alkadiene, or a mixture thereof, or a polymer containing about 100 wt.% of 2-methyl-1-pentene; and (f) a mixture of (a), (b), (c), (d) and / or (e) The composition according to claim 1, which is selected from the group consisting of.

7. The composition according to claim 6, wherein the amorphous polymer is selected from the group consisting of (a) and (b), and mixtures thereof.

8. The composition according to claim 1, wherein the non-polymeric water-absorbing filler contains a clay mineral, and preferably the water-absorbing filler contains cement.

9. The composition according to claim 1, wherein the polymeric water-absorbing filler contains polyacrylamide, preferably polymethyl acrylate.

10. The composition according to claim 1, which contains an antioxidant.

11. A tape comprising a layer containing the anticorrosive composition according to claim 1.

12. An article, comprising: (a) (i) a layer of the anticorrosive composition according to claim 1 on the surface of the article, and (ii) a mechanical protective layer for protecting the layer of the anticorrosive composition, or (b) the tape according to claim 11.

13. A method for protecting an article against corrosion, comprising, in the following order: (a) a step of applying a layer of the anticorrosive composition according to claim 1, and (b) a step of applying a mechanical protective layer on the layer of the anticorrosive composition or the tape, wherein the article is in a dry environment, a wet environment, a moist environment, an immersion environment, and a submersion environment during the application of the layer of the anticorrosive composition according to claim 1.

14. The method according to claim 13, wherein the application of the composition according to claim 1 is carried out in a dry environment, a wet environment, a moist environment, an immersion environment, and a submersion environment.

15. The method according to claim 13, wherein the operating temperature range is from about -50 °C to about +100 °C.

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