Composition and film

Abstract

The first problem addressed by the present invention is to provide a composition having excellent in waterproofing characteristics, embedding properties, and maintainability of an embedded state. The second problem addressed by the present invention is to provide a film using this composition.　This composition contains polyurethane formed from a polyoxyalkylene structure-including polyol and a polyisocyanate, and particles, wherein the Asker C hardness is 5 or less, the ratio of the loss elastic modulus G'' to the storage elastic modulus G' at a temperature of 25° C, a frequency of 1 Hz, and a strain of 0.1% is 0.400 or more, and the ratio of the storage elastic modulus G' at a temperature of 25° C, a frequency of 1 Hz, and a strain of 10% to the storage elastic modulus G' at a temperature of 25° C, a frequency of 1 Hz, and a strain of 0.1% is less than 0.900.

Description

Composition, film

[0001] The present invention relates to compositions and films.

[0002] Various water-stopping techniques have been studied to reduce damage caused by flooding or water leakage. Examples of water-stopping techniques include a method of covering a water inlet or outlet with a water-stopping material. Flooding damage to buildings occurs, for example, when water enters through gaps in windows, doors, etc. A method of sealing the gaps and preventing water intrusion using a water-stopping material is effective against such flooding damage. Specifically, for example, a water-stopping material using a water-absorbing composition has been studied, which absorbs water when the water comes into contact with the water-absorbing composition placed in the water intrusion path and stops the water.

[0003] As an example of such a water-stopping material, Patent Document 1 discloses a water-stopping material comprising a water-absorbent resin contained in a closed-cell flexible polyurethane foam body having a closed cell ratio of 15% or more, and having a hardness of 70 or less after applying pressure for 5 minutes as measured by an Asker C-type hardness tester.

[0004] Japanese Unexamined Patent Publication No. 63-036341

[0005] In recent years, there has been an increasing demand for water-stopping materials that can be easily used in locations of various shapes, and compositions used in such water-stopping materials are required to have excellent water-stopping ability and embeddability. In this specification, embeddability refers to the ability to embed a corner without gaps. Furthermore, the composition is also required to be able to maintain its embedded state after being embedded in the corner. The present inventors have studied the composition described in Patent Document 1 and found that there is room for improvement in terms of the balance between water-stopping ability, embeddability, and ability to maintain the embedded state.

[0006] Therefore, an object of the present invention is to provide a composition that is excellent in water-stopping ability, embeddability, and ability to maintain the embedded state. Another object of the present invention is to provide a film using the composition.

[0007] As a result of extensive research into solving the above problems, the present inventors have found that the problems can be solved by the following configuration.

[0008] [1] A composition comprising: a polyurethane formed from a polyol having a polyoxyalkylene structure and a polyisocyanate; and particles, wherein the composition has an Asker C hardness of 5 or less; a ratio of the loss modulus G" to the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% of 0.400 or more; and a ratio of the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 10% to the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% of less than 0.900. [2] The composition according to [1], wherein the equivalent ratio of the isocyanate groups of the polyisocyanate to the hydroxyl groups of the polyol is 0.75 to 0.79. [3] The composition according to [1] or [2], wherein the content of the particles is 41% by mass or more based on the total mass of the composition. [4] The composition according to any one of [1] to [3], wherein the particles have an average particle size of 10 μm or more. [5] The composition according to any one of [1] to [4], wherein the particles have a moisture content of 5 mass% or more. [6] The composition according to any one of [1] to [5], wherein the Asker C hardness is 0. [7] The composition according to any one of [1] to [6], wherein the composition is used for waterproofing. [8] A film having a substrate layer and a composition layer consisting of the composition according to any one of [1] to [7]. [9] The film according to [8], further having an adhesive layer on the side of the composition layer opposite to the substrate layer side.

[0009] According to the present invention, a composition having excellent water-stopping ability, embeddability, and ability to maintain the embedded state can be provided. Furthermore, according to the present invention, a film using the composition can also be provided.

[0010] In this specification, a numerical range expressed using "to" means a range that includes the numerical values ​​written before and after "to" as the lower and upper limits. Furthermore, in this specification, when two or more types of a certain component are present, the "content" of that component means the total content of those two or more components. In this specification, in a numerical range described in stages, the upper or lower limit value described in a certain numerical range may be replaced with the upper or lower limit value of another numerical range described in stages. Furthermore, in a numerical range described in this specification, the upper or lower limit value described in a certain numerical range may be replaced with a value shown in the Examples. In this specification, a combination of two or more preferred embodiments is a more preferred embodiment.

[0011] In this specification, the term "(meth)acrylic" refers to a concept that includes either or both of acrylic and methacrylic, and the term "(meth)acrylate" refers to a concept that includes either or both of acrylate and methacrylate, and the same applies to the terms "(meth)acryloyl" and "(meth)acryloxy."

[0012] In addition, the term "organic group" used herein refers to a group containing at least one carbon atom.

[0013] In this specification, the weight average molecular weight (Mw), number average molecular weight (Mn), and polydispersity (also referred to as "molecular weight distribution") (Mw / Mn) are defined as polystyrene equivalent values ​​measured by GPC (Gel Permeation Chromatography) using a GPC apparatus (HLC-8120GPC, manufactured by Tosoh Corporation) (solvent: tetrahydrofuran, flow rate (sample injection amount): 10 μL, column: TSK gel Multipore HXL-M (manufactured by Tosoh Corporation), column temperature: 40°C, flow rate: 1.0 mL / min, detector: differential refractive index detector). In this specification, unless otherwise specified, measurements of various physical properties are carried out at 25°C. Furthermore, when measuring various physical properties, unless otherwise specified, the measurement object shall be left in the test environment (25°C unless otherwise specified) for 12 hours or more before the measurement is carried out.

[0014] [Composition] The composition of the present invention will be described in detail below. The composition of the present invention (hereinafter also referred to simply as "composition") comprises a polyurethane (hereinafter also referred to as "specific polyurethane") formed from a polyol having a polyoxyalkylene structure (hereinafter also referred to as "specific polyol") and a polyisocyanate, and particles, and has an Asker C hardness of 5 or less, a ratio of the loss modulus G" to the storage modulus G' (G" / G', tan δ) at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% of 0.400 or more, and a ratio of the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 10% (hereinafter also referred to as "G'10%") to the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% (hereinafter also referred to as "G'0.1%") (G'10% / G'0.1%, hereinafter also referred to as "G' ratio") of less than 0.900.

[0015] Although the reason why the composition having the above configuration can solve the problems of the present invention is not entirely clear, the inventors speculate as follows. The following speculation does not limit the mechanism by which the effect is obtained. In other words, even if the effect is obtained by a mechanism other than the one described below, it is still within the scope of the present invention. The composition of the present invention has good water swelling properties due to the inclusion of a specific polyurethane, and as a result, it can rapidly absorb water and swell upon contact with water, and has good water-stopping ability. Furthermore, the composition of the present invention has plastic deformability due to the inclusion of particles, and has an Asker C hardness of 5 or less and a tan δ of 0.400 or more, allowing for flexible deformation during application and excellent embeddability. Furthermore, the composition of the present invention has a G' ratio of less than 0.900, which makes it less likely to generate repulsive force after application and allows for good embeddability maintenance. Hereinafter, a composition that is superior in at least one of water-stopping ability, embeddability, and embeddability maintenance is also referred to as having "excellent effects of the present invention."

[0016] The components that the composition may contain and the properties of the composition will be described in detail below.

[0017] [Specific Polyurethane] The composition contains a specific polyurethane. The specific polyurethane is a polyurethane formed from a polyol (specific polyol) containing a polyoxyalkylene structure and a polyisocyanate. In other words, the specific polyurethane is a reaction product of the specific polyol and the polyisocyanate.

[0018] The equivalent ratio of the isocyanate groups (NCO groups) of the polyisocyanate to the hydroxyl groups (OH groups) of the specific polyol is preferably 0.50 to 1.00, more preferably 0.70 to 0.90, even more preferably 0.75 to 0.80, and particularly preferably 0.75 to 0.79, in terms of making the composition more likely to satisfy predetermined physical properties.

[0019] The specific polyurethane preferably has a crosslinked structure in order to prevent dissolution of the composition. The crosslinked structure may be either a physical crosslink or a chemical crosslink, but a chemical crosslink is preferred in terms of durability. That is, the specific polyurethane preferably has a three-dimensional crosslinked structure formed by covalent bonds.

[0020] (Specific Polyol) The specific polyol is a polyhydric alcohol compound containing a polyoxyalkylene structure. The number of hydroxyl groups possessed by the specific polyol is not limited as long as it is 2 or more, but is preferably 3 or more, more preferably 3 or 4, and even more preferably 3. The molecular weight of the specific polyol is preferably 1,000 to 10,000, more preferably 2,000 to 8,000, and even more preferably 3,000 to 6,000, in terms of excellent flexibility of the composition and better effects of the present invention. When the specific polyol has a molecular weight distribution, it is preferable that the number average molecular weight falls within the above range.

[0021] The polyoxyalkylene structure is -(O-AL) ｎ- is a structural moiety represented by the formula (I). AL represents an alkylene group. The alkylene group may be linear, branched, or cyclic, and is preferably linear or branched, and more preferably linear. The number of carbon atoms in the alkylene group represented by AL is preferably 1 to 6, more preferably 2 to 4, even more preferably 2 or 3, and particularly preferably 2. Specific examples of the alkylene group represented by AL include a methylene group, an ethylene group, and a propylene group (specifically, an n-propylene group and a 2-methylethylene group), and an ethylene group or a 2-methylethylene group is preferred, and an ethylene group is more preferred. n represents the number of repetitions. The number of repetitions represented by n may be any number equal to or greater than 2, and is, for example, preferably 2 to 300, more preferably 10 to 200, even more preferably 15 to 100, and particularly preferably 20 to 50.

[0022] In the polyoxyalkylene structure, AL may be one type or two or more types. The specific polyol may have only one polyoxyalkylene structure in the molecule, or two or more. The polyoxyalkylene structure preferably contains an oxyethylene structural unit, since the specific polyurethane has excellent water swelling properties and excellent water-stopping ability.

[0023] In the specific polyol, the content of oxyethylene structural units in the molecule is preferably 30 mol% or more, more preferably 50 mol% or more, even more preferably 60 mol% or more, particularly preferably 65 mol% or more, and most preferably 70 mol% or more, based on the total oxyalkylene structural units in the molecule, in order to provide the specific polyurethane with excellent water swelling properties and water-stopping ability, with the upper limit being 100 mol% or less.

[0024] The specific polyol is preferably a polyoxyalkylene polyol obtained by polymerizing an oxirane compound containing at least ethylene oxide using a low-molecular-weight polyol as an initiator. Examples of the low-molecular-weight polyol include low-molecular-weight diols such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, and diethylene glycol, and low-molecular-weight triols such as glycerin and trimethylolpropane, with low-molecular-weight triols being preferred. Examples of the oxirane compound include the above-mentioned ethylene oxide, as well as propylene oxide, butylene oxide, and tetrahydrofuran.

[0025] As the specific polyol, a compound represented by the following formula (PO1) is preferred in terms of achieving better effects of the present invention. １ - [(O-AL) ｎ -OH] ｍ Formula (PO1) In formula (PO1), M １ represents an m-valent linking group. AL represents an alkylene group. n is the number of repeating groups and is a number of 2 or more. m represents an integer of 2 or more.

[0026] M １ The m-valent linking group represented by the formula (I) is not particularly limited, and examples thereof include m-valent aliphatic groups and m-valent aromatic groups, with m-valent aliphatic groups being preferred. Examples of the m-valent aliphatic groups include m-valent aliphatic hydrocarbon groups and groups in which one or more carbon atoms of an m-valent aliphatic hydrocarbon group are substituted with heteroatoms, with m-valent aliphatic hydrocarbon groups being preferred. Examples of the heteroatom include an oxygen atom, a nitrogen atom, and a sulfur atom, with an oxygen atom being preferred. The number of carbon atoms in the m-valent linking group is preferably 1 to 20, more preferably 3 to 12, even more preferably 3 to 6, particularly preferably 3 or 4, and most preferably 3.

[0027] AL represents an alkylene group. The alkylene group may be linear, branched, or cyclic, preferably linear or branched, and more preferably linear. The number of carbon atoms in the alkylene group represented by AL is preferably 1 to 6, more preferably 2 to 4, even more preferably 2 or 3, and particularly preferably 2. Specific examples of the alkylene group represented by AL include a methylene group, an ethylene group, and a propylene group (specifically, an n-propylene group and a 2-methylethylene group), with an ethylene group or a 2-methylethylene group being preferred, and an ethylene group being more preferred. AL may be one type, or two or more types.

[0028] n represents the number of repetitions. The number of repetitions represented by n may be any number as long as it is 2 or more, and is, for example, preferably 2 to 300, more preferably 10 to 200, still more preferably 15 to 100, and particularly preferably 20 to 50.

[0029] The structure represented by -(O-AL)n- in formula (PO1) includes -(O-C ２ H ４ ) n Ａ -(O-C ３ H ６ ) n Ｂ It is also preferable that the structure is represented by n Ａ and n Ｂ represents the number of repetitions, each independently representing a number of 2 or more. Ａ and Ｂ The total number is, for example, preferably 2 to 300, more preferably 10 to 200, even more preferably 15 to 100, and particularly preferably 20 to 50.

[0030] m represents an integer of 2 or more, preferably an integer of 2 to 8, more preferably 3 or 4, and even more preferably 3.

[0031] In the compound represented by formula (PO1), the oxyethylene structural unit in the molecule (—O—C ２ H ４The content of the oxyalkylene structural units represented by -O-AL-) relative to the total oxyalkylene structural units in the molecule (the sum of the oxyalkylene structural units represented by -O-AL- in the molecule) is preferably 30 mol % or more, more preferably 50 mol % or more, even more preferably 60 mol % or more, particularly preferably 65 mol % or more, and most preferably 70 mol % or more, in order to provide the specific polyurethane with excellent water swelling properties and water stopping ability. The upper limit is 100 mol % or less.

[0032] Examples of the specific polyol that can be used include Sannix FA103 (manufactured by Sanyo Chemical Industries, Ltd.; a trifunctional polyol containing a polyoxyalkylene structure and in which the content of oxyethylene structural units in the molecule is 70 mol% relative to all oxyalkylene structural units in the molecule), Newpol 80-4000 (manufactured by Sanyo Chemical Industries, Ltd.; a bifunctional polyol containing a polyoxyalkylene structure and in which the content of oxyethylene structural units in the molecule is 80 mol% relative to all oxyalkylene structural units in the molecule), Newpol PE-64 (manufactured by Sanyo Chemical Industries, Ltd.; a bifunctional polyol containing a polyoxyalkylene structure and in which the content of oxyethylene structural units in the molecule is 40 mol% relative to all oxyalkylene structural units in the molecule), and Sannix FA195 (manufactured by Sanyo Chemical Industries, Ltd.; a trifunctional polyol containing a polyoxyalkylene structure and in which the content of oxyethylene structural units in the molecule is 70 mol% relative to all oxyalkylene structural units in the molecule).

[0033] The specific polyol may be used alone or in combination of two or more. The content of the structure derived from the specific polyol in the specific polyurethane is preferably 20 to 45% by mass, more preferably 20 to 40% by mass, and still more preferably 25 to 40% by mass, based on the total mass of the composition.

[0034] (Polyisocyanate) Polyisocyanate is a compound having two or more isocyanate groups (NCO groups). The number of isocyanate groups in the polyisocyanate is not particularly limited as long as it is two or more, but is preferably 3 to 6, and more preferably 3. The molecular weight of the polyisocyanate is preferably 100 to 1,000, more preferably 150 to 500, and even more preferably 200 to 300. When the polyisocyanate has a molecular weight distribution, it is preferable that the number average molecular weight falls within the above range.

[0035] The polyisocyanate may be any known polyisocyanate, such as a chain aliphatic polyisocyanate, an alicyclic polyisocyanate, an aromatic polyisocyanate, or a complex thereof, such as an isocyanurate, a biuret, an allophanate, or an adduct.

[0036] Examples of the linear aliphatic polyisocyanates include linear aliphatic diisocyanates such as methylene diisocyanate, ethylene diisocyanate, propylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate (HDI), heptamethylene diisocyanate, octamethylene diisocyanate, nonamethylene diisocyanate, and decamethylene diisocyanate, and branched aliphatic diisocyanates such as trimethylhexamethylene diisocyanate. Examples of the alicyclic polyisocyanates include isophorone diisocyanate (IPDI), 4,4-dicyclohexylmethane diisocyanate, 1,4-cyclohexylene diisocyanate, and hydrogenated tolylene diisocyanate. Examples of the aromatic polyisocyanate include 4,4'-diphenylmethane diisocyanate (MDI), 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,5-naphthalene diisocyanate, p- or m-phenylene diisocyanate, xylylene diisocyanate, m-tetramethylxylylene diisocyanate, toluene diisocyanate (TDI), phenylene diisocyanate, toluidine diisocyanate, xylylene diisocyanate, naphthylene diisocyanate, triisocyanate toluene, triisocyanate benzene, dianisidine diisocyanate, 4,4'-diphenyl ether diisocyanate, and 4,4',4"-triphenylmethane triisocyanate.

[0037] The polyisocyanate is preferably a complex of a linear aliphatic diisocyanate or a triisocyanate, more preferably a complex of HDI.

[0038] Examples of polyisocyanates that can be used include Duranate D101, Duranate D201, Duranate TKA-100, Duranate E402-100, Duranate AE700-100, and Duranate TUL-100 (all manufactured by Asahi Kasei Corporation).

[0039] The polyisocyanate may be used alone or in combination of two or more. The content of the polyisocyanate-derived structure in the specific polyurethane is preferably 1 to 10 mass%, more preferably 1 to 5 mass%, and even more preferably 2 to 4 mass%, relative to the total mass of the composition. The mass ratio of the polyisocyanate-derived structure to the specific polyol-derived structure in the specific polyurethane is preferably 0.01 to 0.20, more preferably 0.05 to 0.15, and even more preferably 0.05 to 0.11.

[0040] The specific polyurethane may be used alone or in combination of two or more. The content of the specific polyurethane is preferably 20 to 50 mass %, more preferably 20 to 40 mass %, still more preferably 20 to 35 mass %, and particularly preferably 20 to 32 mass %, relative to the total mass of the composition.

[0041] [Particles] The composition contains particles. The composition has plastic deformability due to the inclusion of particles. The shape of the particles is not particularly limited, and examples thereof include spherical, polygonal, scaly, tabular, and irregular shapes. The average particle size of the particles is preferably 1 μm or more, more preferably 5 μm or more, and even more preferably 10 μm or more, in that the composition is more likely to satisfy predetermined physical properties. The upper limit is not particularly limited, and is, for example, preferably 100 μm or less, more preferably 50 μm or less. The average particle size of the particles can be determined by measuring the particle sizes of any 10 particles within the field of view during SEM (Scanning Electron Microscope) observation of the particles, and calculating the arithmetic mean of the measured values.

[0042] Furthermore, the particles are preferably water-containing particles, since this makes it easier for the composition to satisfy the desired physical properties. The moisture content of the particles is preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, and particularly preferably 10% by mass or more. The upper limit is preferably 15% by mass or less, more preferably 12% by mass or less. The moisture content (%) of the particles can be calculated from the change in mass before and after heating when 1 g of the particles is weighed into an aluminum cup and heated in an oven at 105°C for 4 hours.

[0043] When the particles are starch particles, the higher the moisture content, the lower the Asker C hardness of the composition tends to be. When the particles are starch particles, the moisture content is preferably 10% by mass or more.

[0044] The particles may be either organic or inorganic, with organic particles being preferred. Resin particles are particularly preferred as organic particles, with polysaccharide particles being more preferred. An example of a polysaccharide particle is starch particles. Examples of starch particles include corn starch, potato starch, wheat starch, tapioca starch, waxy corn starch, rice starch, and sweet potato starch. The starch particles may also be chemically modified. Modification methods for obtaining modified starch particles include esterification such as acetylation, etherification such as carboxyalkylation, phosphorylation, oxidation, sulfation, phosphate cross-linking, adipic acid cross-linking, enzyme treatment, moist heat treatment, and combinations thereof. Among these, phosphate cross-linking and / or moist heat treatment are preferred. The starch particles may also be cross-linked. The cross-linking method is not particularly limited, and examples include cross-linking methods using a cross-linking agent, and cross-linking methods using radiation (e.g., gamma rays, X-rays, electron beams, etc.) and / or heat.

[0045] The particles may be used alone or in combination of two or more types. The lower limit of the particle content is preferably 25% by mass or more, more preferably 30% by mass or more, and even more preferably 41% by mass or more, relative to the total mass of the composition, from the viewpoint of easily achieving the predetermined physical properties of the composition. The upper limit of the particle content is preferably 70% by mass or less, more preferably 60% by mass or less, and even more preferably 55% by mass or less, relative to the total mass of the composition, from the viewpoint of easily achieving the predetermined physical properties of the composition. Among these, a preferred numerical range for the particle content is preferably 25 to 70% by mass, more preferably 25 to 60% by mass, even more preferably 30 to 55% by mass, and particularly preferably 41 to 55% by mass, relative to the total mass of the composition, from the viewpoint of easily achieving the predetermined physical properties of the composition.

[0046] [Catalyst] The composition may contain a catalyst (preferably a polyaddition catalyst) for synthesizing the specific polyurethane. Known catalysts can be used as the catalyst, including organometallic compounds and tertiary amine compounds. Specific examples include organotin catalysts such as dibutyltin dilaurate and dibutyltin dioctoate, organolead catalysts such as lead octoate, and tertiary amine compounds such as triethylenediamine, N,N'-dimethylhexamethylenediamine, and N,N'-dimethylbutanediamine.

[0047] The catalyst may be used alone or in combination of two or more. The content of the catalyst is preferably 0.01 to 1.0 mass %, more preferably 0.05 to 0.3 mass %, based on the total mass of the composition.

[0048] [Plasticizer] The composition preferably contains a plasticizer, which makes it easier to obtain desired physical properties of the composition. It is also preferable that the plasticizer does not have a crosslinked structure.

[0049] There are no particular restrictions on the plasticizer as long as it is compatible with the specific polyurethane, but polyether ester plasticizers are preferred because they make it easier to obtain the desired physical properties of the composition.

[0050] Examples of polyether ester plasticizers include organic acid esters of polyalkylene glycols and compounds represented by the following formula (PP1). Examples of the polyalkylene glycols include polyethylene glycol, polypropylene glycol, polybutylene glycol, poly(ethylene oxide-propylene oxide) block copolymers, poly(ethylene oxide-propylene oxide) random copolymers, and polytetramethylene glycol. The polyether chain may contain an aromatic unit such as a bisphenol. Examples of the organic acids include monocarboxylic acids (e.g., benzoic acid, butanoic acid, isobutanoic acid, 2-ethylbutyric acid, 2-ethylhexyl acid, and decanoic acid).

[0051] R １ -(O-AL) ｐ -O-CO-R２ Formula (PP1) In formula (PP1), R １ represents a hydrogen atom or a monovalent organic group. ２ represents a monovalent organic group. AL represents an alkylene group. p represents an integer of 2 or more. R １ Examples of the monovalent organic group represented by the formula (I) include an alkyl group, an aryl group, an aralkyl group, and an acyl group. The alkyl group may be linear, branched, or cyclic. The number of carbon atoms in the alkyl group is preferably 1 to 20, more preferably 1 to 18, and even more preferably 1 to 10. The aryl group includes an aryl group having 6 to 18 carbon atoms. The aryl group may be either monocyclic or polycyclic. The aralkyl group includes the above-mentioned alkyl group in which one hydrogen atom is substituted with the above-mentioned aryl group. The number of carbon atoms in the aralkyl group is preferably 7 to 18. Examples of aralkyl groups include a benzyl group and a phenethyl group. Examples of acyl groups include an alkylcarbonyl group and an arylcarbonyl group. The alkyl group portion in the alkylcarbonyl group may be linear, branched, or cyclic. The number of carbon atoms in the alkylcarbonyl group is preferably 2 to 20, more preferably 2 to 18, and even more preferably 2 to 10. The aryl group moiety in the arylcarbonyl group may be either a monocyclic or polycyclic aryl group, and examples thereof include aryl groups having 6 to 18 carbon atoms.

[0052] R ２ Examples of the monovalent organic group represented by the formula (I) include an alkyl group, an aryl group, and an aralkyl group. The alkyl group, the aryl group, and the aralkyl group include the above-mentioned R ２ Examples of the alkyl group, aryl group, and aralkyl group include those similar to those represented by the following formula:

[0053] AL represents an alkylene group. The alkylene group may be linear, branched, or cyclic, preferably linear or branched, and more preferably linear. The number of carbon atoms in the alkylene group represented by AL is preferably 1 to 6, more preferably 2 to 4, still more preferably 2 or 3, and particularly preferably 2. Specific examples of the alkylene group represented by AL include a methylene group, an ethylene group, and a propylene group (specifically, an n-propylene group and a 2-methylethylene group), with an ethylene group or a 2-methylethylene group being preferred, and an ethylene group being more preferred.

[0054] AL may be one type or two or more types.

[0055] p represents the number of repetitions. The number of repetitions represented by p may be any number as long as it is 2 or more, and is, for example, preferably 2 to 50, more preferably 3 to 10, and even more preferably 4 or 5.

[0056] Examples of commercially available polyether ester plasticizers include Sunflex EB-200 and Sunflex EB-400 manufactured by Sanyo Chemical Industry Co., Ltd., and Adeka Cizer RS-1000, RS-735, and RS-700 manufactured by ADEKA Corporation.

[0057] The plasticizer may be used alone or in combination of two or more. The content of the plasticizer is preferably 15 to 40% by mass, more preferably 15 to 35% by mass, and even more preferably 20 to 35% by mass, based on the total mass of the composition.

[0058] [Other Components] The composition may contain other components in addition to the components described above. Examples of other components include an adhesive component that may be contained in the adhesive layer described below, a resin other than the specific polyurethane, a polymerization initiator, a dye, and a crosslinking agent.

[0059] [Properties of Composition] <Asker C Hardness> The Asker C hardness of the composition is 5 or less, and is preferably 3 or less, more preferably 2 or less, and even more preferably 1 or less, in that the effects of the present invention are more excellent. The lower limit is 0. The Asker C hardness can be measured using an Asker C-type testing machine (Asker Rubber Hardness Tester Type C, manufactured by Kobunshi Keiki Co., Ltd.) at a test temperature of 25°C according to a method in accordance with JIS K 7312. The Asker C hardness is measured after the measurement object has been left in the test environment (25°C) for 12 hours or more.

[0060] <Viscoelastic Properties> The tan δ of the composition at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% is 0.400 or more, and is preferably 0.500 or more, more preferably 0.550 or more, and even more preferably 0.600 or more, in terms of providing better effects of the present invention. The upper limit is not particularly limited, but is often 1.000 or less, and preferably 0.800 or less. The tan δ of the composition at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% can be calculated from the values ​​of the storage modulus G' and loss modulus G'' at a strain of 0.1%, obtained by performing strain dispersion measurements at a temperature of 25°C, a measurement frequency of 1 Hz, and a strain of 0.001 to 100%, using a rheometer (MCR302, manufactured by Anton Paar). The strain dispersion measurements are performed after the measurement object has been left in a test environment (25°C) for 12 hours or more.

[0061] The storage modulus G' of the composition at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% is preferably 500 to 50,000 Pa, more preferably 1,000 to 30,000 Pa, and even more preferably 1,000 to 20,000 Pa. The loss modulus G'' of the composition at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% is preferably 500 to 50,000 Pa, more preferably 1,000 to 30,000 Pa, even more preferably 1,000 to 20,000 Pa, and particularly preferably 1,000 to 12,000 Pa. The storage modulus G' and loss modulus G'' are determined by the same method as for tan δ described above.

[0062] The ratio (G' ratio) of the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 10% to the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% of the composition is less than 0.900, and is preferably 0.700 or less, more preferably 0.600 or less, in order to obtain better effects of the present invention. The lower limit is not particularly limited, but is often 0.100 or more, preferably 0.200 or more, and more preferably 0.400 or more. The storage modulus G' at 0.1% strain is determined in the same manner as tan δ described above. The storage modulus G' at 10% strain is determined from the value of the storage modulus G' at 10% strain in the same manner as tan δ described above.

[0063] From the viewpoint of water-stopping ability and durability, the water absorption rate of the composition is preferably 1.1 to 5.0, more preferably 2.0 to 4.0, and even more preferably 2.0 to 3.0. The water absorption rate is the water absorption rate after 1 hour, and can be calculated by dividing the mass of the composition immersed in water adjusted to 25°C for 1 hour by the mass of the composition before immersion.

[0064] [Method for Producing Composition] The method for producing the composition is not particularly limited, and the composition can be produced by a known method. For example, a method can be used in which raw materials for the specific polyurethane (specific polyol and polyisocyanate), particles, a plasticizer, and, if necessary, other optional components (e.g., catalyst, dye) are mixed together, and the composition is produced while polymerizing the specific polyurethane. The mixing can be carried out in the air or in an inert gas atmosphere. The mixing can also be carried out under normal pressure or reduced pressure. During the polymerization of the specific polyurethane, polymerization treatments such as heating and light irradiation can be carried out as necessary. One or more selected from the raw materials before mixing, the mixture, and the composition after formation can be dried as necessary.

[0065] [Uses] The use of the composition of the present invention is not particularly limited, but it is preferably used for water blocking. As a water blocking method, it may be used to prevent or reduce water leakage. The manner in which the composition is used for water blocking is not particularly limited, and the composition may be placed directly at the water blocking location, or may be used in the form of a film described below. The composition of the present invention can also be used as an agricultural water retention material. For example, by directly spraying the composition on a field or covering the soil with a film described below, it is possible to reduce the frequency of watering agricultural crops.

[0066] [Film] The film of the present invention includes a substrate layer and a composition layer which is a layer of the above-described composition.

[0067] [Substrate Layer] The material of the substrate constituting the substrate layer is not particularly limited, but examples thereof include resins, such as cellulose, polyester, rayon, polyolefin, poly(meth)acrylate, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), cycloolefin polymer (COP), and acrylonitrile / butadiene / styrene copolymer (ABS).

[0068] The substrate preferably has flexibility in terms of workability. The substrate may contain fibers. Examples of the fibers include cellulose fibers, rayon fibers, polyolefin fibers, and polyester fibers. The substrate containing fibers is preferably nonwoven fabric, cloth, or paper, and more preferably nonwoven fabric.

[0069] The thickness of the substrate layer is not particularly limited and is, for example, 15 to 200 μm. The substrate may also function as an adhesive layer having adhesiveness or bonding properties.

[0070] [Composition Layer] The film includes a composition layer, which is a layer of the above-described composition. The method for forming the composition layer is not particularly limited, and examples thereof include a method of attaching a composition to a substrate and a method of applying a composition layer-forming composition to a substrate to form a composition. The composition for forming the composition layer is not particularly limited, and examples thereof include a composition containing specific polyurethane raw materials (specific polyol and polyisocyanate), particles, a plasticizer, and, if necessary, other optional components (e.g., catalyst, pigment). After disposing the composition layer-forming composition on the substrate, it may be subjected to a polymerization treatment (e.g., a heating treatment, a light irradiation treatment, etc.) if necessary.

[0071] The thickness of the composition layer is preferably from 100 to 5000 μm, more preferably from 1000 to 2000 μm.

[0072] [Adhesive Layer] The film preferably further has an adhesive layer on the side of the composition layer opposite to the substrate layer. The adhesive layer is a layer that has at least one of the functions of adhesion and cohesion to members (e.g., glass, resin, metal, and ceramics). By having the adhesive layer in the film, the film can be easily maintained in a water-stopping location. The adhesive layer is preferably a water-absorbing adhesive layer. A water-absorbing adhesive layer is a layer that absorbs water when in contact with water and thereby exhibits or increases adhesiveness or cohesion. By using the adhesive layer as a water-absorbing adhesive layer, excellent adhesiveness can be exhibited even in water-wet locations, making the film highly convenient when used as a water-stopping film.

[0073] As the component of the adhesive layer, known adhesives and pressure sensitive adhesives can be used, such as vinyl resins, silicones, poly(meth)acrylates, polyurethanes, polyamides, polyesters, polyolefins, and rubbers.

[0074] Examples of vinyl resins include polyvinyl alcohol and polyvinylpyrrolidone.

[0075] Examples of silicones include addition reaction type silicones, peroxide curing type silicones, and condensation type silicones.

[0076] Examples of poly(meth)acrylates include homopolymers of (meth)acrylic acid ester monomers and copolymers of acrylic acid ester monomers with other monomers. Examples of acrylic acid ester monomers include methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, dimethylaminoethyl methacrylate, and glycidyl methacrylate. Examples of other monomers include vinyl acetate, (meth)acrylonitrile, (meth)acrylamide, styrene, methacrylic acid, acrylic acid, itaconic acid, methylol acrylamide, and maleic anhydride.

[0077] Polyurethanes include, for example, polyester polyurethanes and polycarbonate polyurethanes.

[0078] Examples of polyamides include polyamide (amide 11) obtained by ring-opening polycondensation of undecane lactam and polyamide (amide 12) obtained by ring-opening polycondensation of lauryllactam.

[0079] Examples of polyesters include condensation polymers of polycarboxylic acids and polyhydric alcohols, and specific examples thereof include polyethylene terephthalate and polybutylene terephthalate.

[0080] Examples of polyolefins include olefin homopolymers and copolymers of olefins with other monomers. The olefin is preferably an olefin having 2 to 6 carbon atoms. Examples of olefins include ethylene, propylene, butene, methylpentene, and hexene. Examples of copolymers of olefins with other monomers include EVA (ethylene-vinyl acetate copolymer), EAA (ethylene-acrylic acid copolymer), EEA (ethylene-ethyl acrylate copolymer), and EMMA (ethylene-methyl methacrylate copolymer).

[0081] Examples of rubbers include styrene / butadiene copolymers (SBR, SBS), styrene / isoprene copolymers (SIS), acrylonitrile-butadiene copolymers (NBR), chloroprene polymers, and isobutylene / isoprene copolymers (butyl rubber).

[0082] In terms of excellent water-absorbing adhesiveness, the adhesive layer preferably contains a vinyl resin, and more preferably contains polyvinyl alcohol.

[0083] The method for forming the adhesive layer is not particularly limited, and the adhesive layer can be formed, for example, by applying an adhesive layer-forming composition onto the composition layer. After applying the adhesive layer-forming composition, drying treatment and heat treatment may be performed as necessary. The adhesive layer-forming composition may contain other components in addition to those described above. Examples of other components include solvents, ultraviolet absorbers, antioxidants, crosslinking agents, surfactants, fillers, colorants, light stabilizers, thickeners, and polymerization initiators.

[0084] The thickness of the adhesive layer is, for example, 10 to 500 μm.

[0085] The film is preferably used as a waterproof film. A film having an adhesive layer may also be used as a waterproof tape.

[0086] The method of using the film is not particularly limited, and examples thereof include a method in which the film is placed on an object with the composition layer side of the film facing the object. The object is not particularly limited, and examples thereof include buildings, more specifically, areas containing gaps such as windows and doors. By placing the film in the area where the gap exists, the composition swells when it comes into contact with water that has entered through the gap, thereby sealing the gap and preventing water leakage.

[0087] The present invention will be described in more detail below with reference to examples. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited by the examples shown below.

[0088] Example 1 Preparation of Composition and Film Fabrication The components listed in Table 1 were mixed in a 300 mL stirring vessel (product name "002 Stirring Vessel", manufactured by Kinki Yoki Co., Ltd.) to obtain the composition listed in Table 1, yielding 100 g of a mixture. The mixture was placed in a mixer (product name "ARV-310", manufactured by Thinky Corporation) and subjected to reduced pressure stirring for 1 minute at a rotation speed of 900 rpm (revolutions per minute) and a pressure of 3 kPa. 18 g of the mixture after reduced pressure stirring was poured into a flat glass petri dish (inner diameter 7 cmφ) and allowed to stand at 25°C for 24 hours. The composition was then removed from the flat glass petri dish, yielding a cylindrical composition sample A with a diameter of approximately 7 cm and a height of approximately 4 mm. Separately, the mixture after the reduced pressure stirring treatment was poured into an acrylic resin container measuring 50 mm in length, 100 mm in width, and 2 mm in height, and left to stand at 25° C. for 2 hours. After that, a nonwoven fabric (substrate, Kuraseal M) cut to a size of 50 mm in length and 100 mm in width was attached to the mixture, and the mixture was left to stand for 22 hours or more at 25° C. Thereafter, a laminate having a composition layer on a substrate layer was removed from the acrylic resin container, and a PVA film (Solbron PT40, manufactured by Aicello Co., Ltd.) cut to a size of approximately 50 mm in length and approximately 100 mm in width was attached to the surface of the composition layer opposite the substrate, thereby obtaining a film sample B having a size of approximately 50 mm in length, approximately 100 mm in width, and approximately 2 mm in height, and having a substrate layer, a composition layer, and an adhesive layer in this order.

[0089] [Measurement of Physical Properties] <Measurement of Asker C Hardness> The Asker C hardness of the prepared composition sample A was measured at 25°C using an Asker Rubber Hardness Tester Type C (manufactured by Kobunshi Keiki Co., Ltd.) The measurement of the Asker C hardness was carried out after the prepared composition sample A was left in a test environment of 25°C for 12 hours or more.

[0090] <Measurement of storage modulus G', storage modulus G'', and tan δ> For the prepared composition sample A, strain dispersion measurements were carried out at strains of 0.001 to 100% using a rheometer (MCR302, manufactured by Anton Paar) under conditions of a temperature of 25°C, a frequency of 1 Hz, Nf = 1 N, and a measurement plate of PP25. From the obtained values ​​of the storage modulus G' and loss modulus G'' at a strain of 0.1%, tan δ at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% was calculated. The strain dispersion measurements were carried out after the prepared composition sample A was placed in a test environment of 25°C for 12 hours or more.

[0091] <Measurement of G' Ratio> For the prepared composition sample A, strain dispersion measurement was performed at strains of 0.001 to 100% using a rheometer (MCR302, manufactured by Anton Paar) under conditions of a temperature of 25°C, a frequency of 1 Hz, Nf = 1 N, and a measurement plate of PP25. The strain dispersion measurement was performed after the prepared composition sample A was placed in a test environment of 25°C for 12 hours or more. From the obtained values ​​of the storage modulus G' at a strain of 0.1% and the storage modulus G' at a strain of 10%, the G' ratio (storage modulus G' at a strain of 10% / storage modulus G' at a strain of 0.1%) at a temperature of 25°C and a frequency of 1 Hz was calculated.

[0092] [Examples 2 to 4, 7, and 8, Comparative Examples 1 to 7] Compositions were prepared, films were produced, and physical properties were measured in the same manner as in Example 1, except that the compositions and blending amounts were adjusted to be as shown in Table 1.

[0093] [Example 5] The composition was prepared, the film was produced, and the physical properties were measured in the same manner as in Example 1, except that the step of attaching a PVA film (Solbron PT40, manufactured by Aicello) to the side of the composition layer opposite the substrate was not performed in producing film sample B. [Example 6] The composition was prepared, the film was produced, and the physical properties were measured in the same manner as in Example 1, except that the step of attaching a nonwoven fabric (substrate, Kuraseal M) to the mixture was not performed in producing film sample B.

[0094] [Various Components] Each component shown in Table 1 will now be described. [Polyol] - "EXCENOL 840" (manufactured by AGC Inc. A trifunctional polyol containing a polyoxyalkylene structure and in which the content of oxyethylene structural units in the molecule is 15 mol% relative to all oxyalkylene structural units in the molecule) - "SANNICS FA-103" (manufactured by Sanyo Chemical Industry Co., Ltd. A trifunctional polyol containing a polyoxyalkylene structure and in which the content of oxyethylene structural units in the molecule is 70 mol% relative to all oxyalkylene structural units in the molecule)

[0095] [Polyisocyanate] "Duranate TKA-100" (manufactured by Asahi Kasei Corporation, trifunctional polyisocyanate)

[0096] [Plasticizers] "Sunflex EB-200" (manufactured by Sanyo Chemical Industries, Ltd., plasticizer having a polyoxyethylene structure) Diisononyl phthalate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.)

[0097] [Catalyst] Dibutyltin dilaurate (Fujifilm Wako Pure Chemical Industries, Ltd.)

[0098] [Particles] Corn starch (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.; corn starch, average particle size 15 μm, moisture content 12% by mass) Fine Snow (manufactured by Joetsu Starch Co., Ltd.; rice starch, average particle size 5 μm, moisture content 10% by mass) Calcium carbonate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.; average particle size 4 μm, moisture content 0% by mass)

[0099] <Measurement of particle diameter> The particles were observed under an SEM, and the particle diameters of 10 particles selected from the field of view were measured. The arithmetic mean value of the obtained measurements was calculated and used as the average particle diameter.

[0100] <Measurement of Moisture Content of Particles> 1 g of particles was weighed into an aluminum cup and heated in an oven at 105°C for 4 hours, and the moisture content (%) was calculated from the change in mass before and after heating. Specifically, the moisture content was calculated according to the following formula: Moisture content (%) = (mass of particles before heating - mass of particles after heating) / mass of particles before heating

[0101] [Evaluation] [Water-stopping ability] Composition sample C, 60 mm long, 60 mm wide, and 2 mm thick, was prepared according to the preparation procedure for sample A. Composition sample C was immersed in distilled water adjusted to 25°C, and the mass before immersion and the mass after immersion for 1 hour were measured, and the water absorption rate was calculated according to the following formula: Water absorption rate = Mass of composition sample C after immersion for 1 hour / Mass of composition sample C before immersion From the obtained water absorption rate, the water-stopping ability was evaluated according to the following evaluation criteria. The faster the water absorption rate, the more quickly the composition swells and the more excellent the water-stopping ability. For practical purposes, a rating of B or higher is preferable for water-stopping ability.

[0102] <Evaluation criteria> A: Water absorption rate of 2.0 or more B: Water absorption rate of 1.1 or more but less than 2.0 C: Water absorption rate less than 1.1

[0103] [Embeddability] An acrylic resin test tank measuring 300 mm wide, 300 mm deep, and 700 mm high, with a 90° angle between the wall and bottom, was prepared. A 50 mm wide, 10 mm high through-hole was provided in the lower part of one of the inner walls of the test tank, at a position where it abutted the inner bottom. Film sample B, which had been wetted with water by immersion in water for 1 second, was attached to the inner wall and inner bottom of the test tank, covering the entire surface of the hole, with the longitudinal direction of film sample B (the 100 mm length direction) approximately parallel to the width direction of the hole (the 50 mm direction). At this time, film sample B was attached so that the surface removed from the acrylic resin container faced the inner wall of the test tank. The intersection of the inner wall and the inner bottom of the test tank was visually inspected, and the embeddability was evaluated according to the following evaluation criteria based on the presence or absence and extent of a gap between the test tank and film sample B. In practice, embeddability is preferably evaluated as B or higher.

[0104] <Evaluation criteria> A: No gap occurs between the test water tank and the film. B: A gap of less than 1 mm occurs between the test water tank and the film. C: A gap of 1 mm or more occurs between the test water tank and the film.

[0105] [Embedding Retention] After the evaluation of embeddability described above was carried out, the gap was rechecked one hour later, and the gap retention was visually confirmed and evaluated according to the following criteria. In practice, it is preferable that the embeddability be rated B or higher.

[0106] <Evaluation criteria> A: No gap occurs between the test water tank and the film. B: A gap of less than 1 mm occurs between the test water tank and the film. C: A gap of 1 mm or more occurs between the test water tank and the film.

[0107] [Wet surface application] An acrylic resin test tank measuring 300 mm wide, 300 mm deep, and 700 mm high, with the wall and bottom surfaces forming a 90° angle, was prepared. After filling the tank with water, film sample B was attached to the inner surface of the tank in the water, and the wet surface application was evaluated according to the following evaluation criteria. From the viewpoint of handling, it is preferable that the film has wet surface application properties. A: Applicable B: Cannot be attached

[0108] [Tackiness] The surface of the substrate side of film sample B was evaluated by touch, and tackiness was evaluated according to the following evaluation criteria. When the film sample did not have a substrate, the surface of the composition layer opposite the adhesive layer was used as the surface of the substrate side. From the viewpoint of handling, it is preferable that the surface of the film on the substrate side does not have tackiness. A: No tackiness B: Tackiness

[0109] [Results] Table 1 below shows the composition, physical properties, and evaluation results of the composition. In Table 1, "G' (Pa)" represents the storage modulus G' (Pa) at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1%, "G" (Pa) represents the loss modulus G" (Pa) at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1%, and "tan δ (G" / G')" represents the ratio (tan δ) of the loss modulus G" to the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1%. In Table 1, "G' ratio (G'10% / G'0.1%)" represents the ratio of the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 10% to the storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1%. In Table 1, "NCO / OH" indicates the equivalent ratio of the isocyanate group (NCO) of the polyisocyanate to the hydroxyl group (OH) of the polyol. In Table 1, the value shown in the column for each component is the content (parts by mass) in the composition.

[0110]

[0111]

[0112] Table 1 confirms that the composition of the present invention has excellent water-stopping ability, embeddability, and embeddability retention. Furthermore, a comparison of Examples 1 and 2 with Examples 3 and 4 confirmed that when the particle content was 41% by mass or more relative to the total mass of the composition, the embeddability retention was better. Furthermore, a comparison of Example 2 with Example 7 confirmed that when the average particle diameter of the particles was 10 μm or more, the embeddability was better. Furthermore, a comparison of Example 2 with Example 8 confirmed that when the equivalent ratio (NCO / OH) of polyol to isocyanate was 0.75 to 0.79, the embeddability was better. Furthermore, a comparison of Example 3 with Example 5 confirmed that when the film had an adhesive layer, wet surface application was better. Furthermore, a comparison of Example 3 with Example 6 confirmed that when the film had a substrate, stickiness on the back surface was further suppressed.

Claims

1. A composition comprising: a polyurethane formed from a polyol containing a polyoxyalkylene structure and a polyisocyanate; and particles; having an Asker C hardness of 5 or less; a ratio of a loss modulus G'' to a storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% of 0.400 or more; and a ratio of a storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 10% to a storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% of less than 0.

900.

2. The composition according to claim 1, wherein the equivalent ratio of the isocyanate groups of said polyisocyanate to the hydroxyl groups of said polyol is 0.75 to 0.

79.

3. The composition according to claim 1 or 2, wherein the content of the particles is 41% by mass or more based on the total mass of the composition.

4. The composition according to claim 1 or 2, wherein the particles have an average particle size of 10 μm or more.

5. The composition according to claim 1 or 2, wherein the moisture content of the particles is 5% by mass or more.

6. The composition according to claim 1 or 2, having an Asker C hardness of 0.

7. The composition according to claim 1 or 2, which is used for waterproofing.

8. A film having a substrate layer and a composition layer comprising the composition according to claim 1 or 2.

9. The film according to claim 8, further comprising an adhesive layer on the side of said composition layer opposite said substrate layer.

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