336 results about "Partial hydrolysis" patented technology

A curable composition comprising (A) an organopolysiloxane having functional groups capable of condensation reaction at both molecular terminals thereof and (B-1) a hydrophobic silica and a hydrophilic silica. A curable composition comprising (A) an organopolysiloxane having functional groups capable of condensation reaction at both molecular terminals thereof and (B-2) a hydrophobic silica, wherein the hydrophobic silica (B-2) is thermally treated together with the organopolysiloxane (A). The organopolysiloxane (A) is preferably represented by the formula: W3-a(R1a)Si(R2)O-(Si(R2)O)n-Si(R1a)W3-a [alpha] (wherein W represents a hydroxyl group or a hydrolyzable group; each of R1 and R independently represents an unsubstituted or substituted monovalent hydrocarbon group having 1 to 12 carbon atoms, provided that the hydrocarbon groups R1 as well as the hydrocarbon groups R may be identical with or different from each other; n is an integer of 5 or greater; and a is 0, 1 or 2). When, in the formula [alpha], W represents a hydroxyl group and a is 2, the curable composition preferably comprises, in addition to the components (A) and either (B-1) or (B-2), (C) an organosilane represented by the formula: R1bSiX4-b [I] (wherein R1 represents an unsubstituted or substituted monovalent hydrocarbon group having 1 to 8 carbon atoms; X represents a hydrolyzable group; and b is 0 or 1), or a partial hydrolyzate of the organosilane. Thus, a curable composition, especially a curable paint composition and an antifouling paint composition, and an antifouling coating film of the following characteristics can be provided. The curable composition, in particular when used as a coating material or a paint, is excellent in sprayability and enables forming a thick coating film by one-time application. The curable composition enables shortening the operating period for coating, and a coating film of uniform thickness can be obtained by the application thereof. The obtained coating film is excellent in film strength and film hardness and, when used for antifouling purposes, exerts excellent antifouling capability for a prolonged period of time. Further, the curable composition ensures excellent storage stability before application thereof.

The polyimide metal laminate has at least one resin layer produced from a silica-dispersed polyimide composition obtained by reacting (A) alkoxysilane and / or its partial hydrolysis polycondensate with (B) an amino-containing compound having a functional group capable of forming a bond with silica, in the presence of water in a polyimide solution and / or a polyamic acid solution.

Described is a coating composition adapted to enhance the adhesion of a polymeric coating or film applied to a substrate. The coating composition is interposed between the substrate and the polymeric coating and comprises (a) at least one coupling agent, partial hydrolysates thereof or mixtures thereof in a concentration greater than 25 weight percent, based on the weight of the total composition, and (b) an adhesion enhancing amount of an epoxy-containing material having at least two epoxy groups. The coating composition is substantially free of photochromic materials and colloidal particles chosen from silica, alumina or mixtures thereof. Also described is a process for using the coating composition and articles coated with the composition and additional coatings and films which can be photochromic.

A room-temperature curable organopolysiloxane composition is provided, which includes (A) an organopolysiloxane with the terminals blocked with a hydroxyl group, a hydrolysable group, or both these types of groups, and (B) an organosilicon compound containing a hydrolysable group, a partial hydrolysis-condensation product thereof, or a mixture of the two, and (C) a polysiloxane containing an oxyalkylene group bonded to a silicon atom via, for example, a C—C—Si linkage. Application of this composition to an underwater structure is able to generate an antifouling coating that is effective in preventing the adhesion and growth of aquatic organisms on the surface of the underwater structure, and displays superior long term endurance of this antifouling effect.

There is disclosed a fluorine-based surface treating agent for vapor deposition comprising (A) a hydrolyzable group-containing silane modified with a polymer containing a fluorooxyalkylene group and / or a partial hydrolytic condensate, and (B) a polymer containing a fluorooxyalkylene group having a higher weight average molecular weight than component (A), wherein components (A) and (B) are mixed in a weight ratio of from 6:4 to 9:1.

Water-soluble organic silicon compounds are prepared by effecting co-hydrolysis of (A) 1-30 parts of an alkyltrialkoxysilane of R1Si(OR2)3 or a partial hydrolyzate thereof, (B) 70-90 parts of an alkoxy-containing siloxane of R3a(OR2)bSiO(4-a-b) / 2, and (C) 1-20 parts of an amino-containing alkoxysilane of R4R5NR6-SiR7n(OR2)3-n or a partial hydrolyzate thereof in the presence of an organic or inorganic acid. R1 is a C7-C18 alkyl group, R2 is a C1-C4 alkyl group, R3 is a C1-C6 alkyl group, R4 and R5 are a hydrogen atom, C1-C15 alkyl or aminoalkyl group, R6 is a divalent C1-C18 hydrocarbon group, and R7 is a C1-C4 alkyl group. Letters a and b are 0.75< / =a< / =1.5, 0.2< / =b< / =2, and 0.95<a+b<3.4. These water-soluble organic silicon compounds are fully water soluble and shelf stable and can be used as an agent for preventing porous materials from water absorption simply after dilution with water. Porous materials are coated or impregnated with the compounds so that they are given excellent water repellency and water absorption-preventing effect.

A silicone coating composition comprising (A) a silicone resin resulting from (co)hydrolytic condensation of an alkoxysilane or a partial hydrolytic condensate thereof, (B) an aromatic-free compound for curing the silicone resin, and (C) a solvent remains stable during shelf storage. It is applied and heat cured to a plastic substrate to form a protective coat having a high hardness, mar resistance, adhesion, toughness and crack resistance.

Alkoxy RTV-1 compositions comprise the product of the reaction of(A) an HO-terminated organopolysiloxane,(B1) an alkoxysilane which has at least three alkoxy groups and / or its partial hydrolysates, and(B2) an alkoxysilane which has two alkoxy groups and / or its partial hydrolysates, in the presence of(C) an acid phosphoric ester of the general formula (I)wherea is 1 or 2,R1 and R2 are a hydrogen radical, methyl radical or hydroxyl radical,b and d are 2 or 3,c is an integer from 2 to 15,e is 0 or 1L comprises a radical -O-, -COO-, -OOC-, -CONR3-, -NR4CO- or -CO-,R3 and R4 are a hydrogen radical or C1-C10-alkyl radical, andM is a monovalent, unsubstituted or hydroxyl-, fluorine-, chlorine-, bromine-,C1-C10-alkoxyalkyl- or cyano-substituted C1-C20-hydrocarbon radical, with the proviso that on any given carbon atom not more than one radical R1 and R2 may be a hydroxyl radical.

Hydrophobic spherical silica microparticles are provided. The microparticles are obtained by subjecting hydrophilic spherical silica microparticles obtained by subjecting a tetrafunctional silane compound and / or a partial hydrolysis-condensation product thereof to hydrolysis and condensation, to a two stage hydrophobic treatment introducing R1SiO3 / 2 units wherein R1 is a monovalent hydrocarbon group and then introducing R23SiO1 / 2 units wherein R2 represents monovalent hydrocarbon groups. The hydrophobic spherical silica microparticles have basic flowability energy of not more than 500 mJ, and a particle size within a range from 0.005 to 0.09 μm. The silica microparticles have excellent flowability and dispersibility, and minimal aggregability, and are useful as a toner external additive.

A room temperature-curable polyorganosiloxane composition is provided. The composition comprises(A) 100 parts by weight of a polyorganosiloxane represented by the following general formula (1):wherein R is a monovalent hydrocarbon group containing 1 to 5 carbon atoms, R1 is independently a substituted or unsubstituted monovalent hydrocarbon group containing 1 to 10 carbon atoms; n is an integer of at least 10; X is oxygen atom or an alkylene group containing 2 to 5 carbon atoms, and m is independently an integer of 0 or 1; or a mixture of such polyorganosiloxane,(B) 0.1 to 50 parts by weight of a partial hydrolysate of an organosilicon compound having at least 3 hydrolyzable groups bonded to silicon atom in one molecule;(C) 1 to 500 parts by weight of at least one filler,(D) 0.01 to 10 parts by weight of a curing catalyst, and(E) 0.1 to 10 parts by weight of a silane coupling agent.The present invention is capable of forming a rubber elastomer which exhibits excellent adhesion to resins whose adhesion has been difficult, for example, polyimide resin.

The invention relates to a composite profile control and oil displacement extraction method for a thickened oil reservoir through water injection and exploitation. The method provided by the invention comprises the following steps: preparing a polymer and water into a polymer solution with the concentration of 500-5000mg / L; preparing a cross-linking agent and water into a cross-linking agent solution with the concentration of 500-5000mg / L; mixing the polymer solution and the cross-linking agent solution according to the mass ratio of (1:1)-(10:1) to obtain a polymer gel solution; preparing a movable micro-gel and water into a movable micro-gel solution with the concentration of 1000-5000mg / L; respectively injecting the polymer gel solution and the movable micro-gel solution into a well to form an oil displacement segmentation plug, wherein the polymer is partial hydrolysis polyacrylamide; the cross-linking agent is an organic chromium cross-linking agent; and the movable micro-gel is a copolymer of acrylamide and N-N methylene bisacrylamide. The method provided by the invention can obviously improve the anisotropism in storage layers, among the layers and on planes, relieves the water injection and exploitation contradictions of the oil reservoir, solves the problems of tonguing and fingering and obviously enlarges the swept volume of a displacing solution, thereby greatly improving the recovery ratio of crude oil.

The invention relates to an antistatic coating composition comprising a hydrolyzate resulting from the at least partial hydrolysis of: a component A consisting of one or more compounds containing at least one polyalkylene oxide segment and at least one —Si(X)n hydrolyzable group, in which n is an integer ranging from 1 to 3 and the X groups are precursors of OH groups; at least one inorganic metal salt; and optionally, at least one component B, consisting of one or more compounds of formula Rn,Si(Z)4-n′ or formula R1n1Ym1Si(Z1)4-n1-m1, in which the R groups are monovalent alkyl groups, the Z and Z1 groups are hydrolyzable groups or hydrogen atoms, the R1 groups are monovalent organic groups linked to the silicon atom through a carbon atom, the Y groups are monovalent organic groups linked to the silicon atom and containing at least one epoxy function, n′ is an integer equal to O, 1 or 2, m1 and n1 are integers such that m1 is equal to 1 or 2 and n1+m1=1 or 2, component A and optional compo nent B being chosen such that a cross-linked structure is generated upon polymerization of said composition, the dry extract of said composition containing less than 5% by weight of free polyalkylene oxide polymers.

The invention relates to a partial hydrolysate of whey protein which contains bioactive peptides but does not have a bitter flavor. The hydrolysate is carried out using selective enzymes which produce the active peptides and is terminated at a degree of hydrolysis before substantial bitter flavors are created. There are also described novel peptides and a method of reducing systolic blood pressure through the administration of the peptides.

A flame retardant additive comprises (A) a gassing agent which is a compound containing both phosphorus and nitrogen, typically ammonium polyphosphate, which is surface coated with (B) a silicone-base water repellent treating agent comprising a co-hydrolytic condensate obtained through co-hydrolytic condensation of (i) an organosilicon compound and (ii) an amino group-containing alkoxysilane or a partial hydrolyzate thereof in the presence of an organic or inorganic acid. The additive is improved in moisture absorption resistance and dispersion and suited for use in resins or elastomers.

The present invention relates to a process for solubilizing keratins from a keratin containing starting material such as poultry feathers. The keratins are may be solubilized using a sulphide under alkaline conditions. In the process the cysteine residues of solubilized keratins and are partially modified, e.g. by alkylation. The conditions of solubilisation and partial modification are chosen such that the keratins are also partially hydrolyzed. The partially modified and partially hydrolyzed keratin may be used as stable dispersions e.g. for the production of films and coatings by casting.

A primer composition for silicone rubbers, in particular for addition-crosslinking silicone rubbers, comprises a tetraalkoxysilane and / or partial hydrolysate thereof, a metal salt, alkoxide, or chelate and / or partial hydrolysate thereof, a silicone resin, and from 50-95% by weight of solvent. The primer provides excellent adhesion between silicone rubber and numerous substrates.

A RTV heat conductive silicone rubber composition comprising (A) an organopolysiloxane having hydrolyzable groups at both ends, (B) an organopolysiloxane having at least one hydrolyzable group at one end, (C) a heat conductive filler, and (D) an organosilicon compound having a hydrolyzable group or a partial hydrolytic condensate thereof experiences a minimized viscosity increase even when loaded with a large amount of heat conductive filler (C), has good potting, coating and sealing properties, and is suited for use in one package form.

The invention relates to a preparation method of an efficient organic silicon emulsion water-proofing agent for reinforcing cement mortar concrete. The preparation method comprises the following steps: firstly adding octene and isopropanol in a three-necked flask, filling the flask with nitrogen, heating in water bath, reacting under a reflux condition, and depressurizing to steam out octyl triethoxysilane; adding methyl triethoxysilane and a dimethyl siloxane ring body in the three-necked flask, using a catalyst to balance the solution, performing hydrolysis on the solution, reacting to obtain a partial hydrolysis prepolymer of methyl silicone resin; at last, weighing octyl triethoxysilane and a methyl silicone resin prepolymer, adding a non-ionic surfactant alkyl alcohol polyoxyethylene ether, fully stirring the solution uniformly, adding water to emulsify the solution, and adding a buffer solution to obtain a waterproof emulsion; or, adding water in a emulsification kettle, adding the non-ionic surfactant and the buffer solution in the kettle, starting a high-speed shearing machine, slowly adding octyl triethoxysilane and the silicon resin prepolymer in the kettle, and emulsifying the substances to obtain the same waterproof emulsion. The efficient organic silicon emulsion water-proofing agent has the characteristics of high water seepage pressure resistance and the like.

The invention discloses an oil refining method. The oil refining method comprises a degumming process, a first refining process, a secondary refining process and a deacidification and deodorization process. The degumming effect of an enzymic degumming method is better, and the phosphorus content after the enzymic degumming can be reduced to an ideal index less than 5ppm; the oil refining can be completed under the conditions of high vacuum degree (0.1 to 10Pa) and short-time heat treatment (less than or equal to 3 seconds), and the oxidization and partial hydrolysis of the oil and generation of harmful substances (such as trans-acid, polymerized glyceride and the like) can be avoided; the core sections (refining and deacidification and deodorization) of the method belong to physical methods, no chemical additive is added in the operation process of the two sections, no waste water pollution is produced, and reference can be provided for improving an existing vegetable oil refining process.

A fluorochemical surface treating agent comprising a hydrolyzable group-containing silane modified with a fluorooxyalkylene-containing polymer and / or a partial hydrolytic condensate thereof forms a water / oil repellent layer having chemical resistance and mar resistance.

The invention provides a polymer modification silane containing fluoro oxidation alkylene and having a waterproof oilproof layer of excellent heat proof property, a surface treating agent having the silane and / or partial hydrolytic condensation product, and an object processed by the surface treating agent. The polymer modification silane containing fluoro oxidation alkylene is indicated by a following formula (1) (wherein, Rf refers to univalent or divalent linear link polymer residue containing fluoro oxidation alkylene, b is averagely 0-10, Z is a single 2-6valent group containing siloxane bond, R is singly alkyl or phenyl of 1-4 carbon atoms, X is a single hydrolytic group, a is a single 2 or 3, y is an integer between1-5 of each unit, alpha is an integer of 1-5, and beta is 1 or 2).

This invention relates to a silane-resin composition that can be obtained by at least partial hydrolytic condensation of at least the following components: (1) one or more sulfonic acid group-containing silane(s) with at least one group that can be cleaved under hydrolytic conditions, (2) one or more styryl-functionalized silane(s) and (3) one or more silane(s) that carry a nitrogen-containing heterocyclic compound, an amine group or a sulfonamide group with at least one group that can be cleaved under hydrolytic conditions, and mixing of the components before, during or after the hydrolytic condensation, as well as a process for the production of this composition. With the silane resin that is obtained, proton-conductive, organically cross-linked heteropolysiloxanes can be produced that are suitable for PEMFC in a layer or membrane form as proton-conductive systems. Their proton conductivity can be further increased by the addition of suitable liquids.

This room-temperature-curable polyorganosiloxane composition contains: (A) 100 parts by mass of polyorganosiloxane consisting of: (A1) 10 to 80 parts by mass of a both ends alkoxysilyl group-terminated polyorganosiloxane and (A2) 90 to 20 parts by mass of a partial hydrolysis condensate (the number of Si atoms is 10 to 200) of a silane compound expressed by a general formula: R4bSi(OR)4-b; (B) 0.1 to 15 parts by mass of a silane compound or a partial hydrolysis condensate thereof (the number of Si atoms is 1 or more and less than 10) as a cross-linking agent; and (C) 0.1 to 15 parts by mass of an organic titanium compound as a curing catalyst. It has low viscosity and good coatability without a solvent, and forms a cured coating film excellent in scratch resistance.

Pre-coating of a metal surface prior to further coating or other treatment uses an aqueous composition wholly or mainly free of chromium (VI) compounds and is such that (a) the composition contains (i) an at least partially hydrolyzable silane and (ii) a metal chelate; and (b) the cleaned, etched or pretreated metal is contacted with the composition and the formed film is dried (and optionally hardened) to a thickness of 0.01-10 mu . Independent claims are also included for (1) the process in which the aqueous composition also contains (iii) an organic film-former comprising a water-soluble or -dispersible (co)polymer of acid number 3-250 and (iv) a long-chain alcohol film-forming aid.; and (2) compositions containing (i) and (ii) at 0.1-10 : 1 ratio and optionally also (iii) and (iv) .

The invention relates to a temperature-resistant salt-resistant HPAM / Cr<3+> / phenolic aldehyde compound crosslinked weak gel profile adjusting and water plugging agent and a preparation method thereof, and belongs to the technical field of oilfield profile adjusting and water plugging. The profile adjusting and water plugging agent is prepared from the following raw materials in percentage by weight: 0.10-0.20 percent of partial hydrolysis polyacrylamide, 0.001-0.008 percent of metal cross-linking agent, 0.02-0.08 percent of organic cross-linking agent, 0.05-0.6 percent of pH regulator and the balance of water. The profile adjusting and water plugging agent is low in initial viscosity and high in injectivity and has high strength after formation gelling, and the plugging property of common weak gel is greatly improved. Moreover, the gelling time is adjustable, plugging at immediate vicinity of wellbore is avoided, the most permeable zone and pore channels are effectively blocked on a target layer, the water injection profile is effectively adjusted, deep profile control can be effectively performed, and the crude oil recovery rate is improved.

A room temperature curable organopolysiloxane composition comprising (A) an organopolysiloxane having organooxysilyl groups on side chains or on side chains and ends of the polymer, (B) fumed silica, (C) an organooxysilane or a partial hydrolytic condensate thereof, and (D) a condensation catalyst is improved in stability during storage under sealed conditions and cures into an elastomeric product whose physical properties change little even when used under rigorous conditions as encountered in proximity to automotive engines.

A process for producing a room temperature vulcanizable organopolysiloxane composition comprising:(A) 100 parts by weight of a diorganopolysiloxane having in one molecule at least two hydroxyl groups and / or hydrolyzable groups connecting to silicon atoms;(B) 0.2 to 10 parts by weight of an alkylene oxide compound having silicon atoms in a molecule;(C) 0.5 to 100 parts by weight of a silica; and(D) 0.5 to 30 parts by weight of a silane and / or condensate of partial hydrolyzate thereof,wherein said process comprises steps of hot-mixing component (A), component (B), and component (C) together, and subsequently mixing component (D) thereto.

The present invention relates to a process for recovering lactide from polylactide (PLA) or glycolide from polyglycolide (PGA), in which, in a first step, PLA or PGA is contacted with a hydrolysing medium and hydrolytically degraded to oligomers. In a further step, a cyclising depolymerisation of the oligomers obtained in the first step is effected to give lactide or glycolide. In addition, the present invention relates to an apparatus based on the combination of a hydrolysis apparatus with a depolymerisation reactor, with which the above-described process can be performed. The core of the process according to the invention is a partial hydrolysis of the polymeric materials originally used in combination with a cyclising depolymerisation.

The invention discloses a modifier for cement concrete and a method for improving performance of the cement concrete. The modifier is silicon dioxide sol obtained by partial hydrolysis of orthosilicate. The modifier can be coated on the surface of a cement concrete material after molding, thereby modifying and curing the cement concrete. According to the modifier disclosed by the invention, a weak acid is used as a catalyst, thereby realizing partial hydrolysis of orthosilicate to form the network-like transparent sol with a very small size, being very easy to infiltrate into cement, mortar and concrete, simultaneously preventing a strong acid from damaging the cement and the concrete and finally forming a protective layer capable of inhibiting an external corrosive medium from entering and eroding. The sol is simple in preparation process, few in raw materials for composition, convenient to operate, low in cost and significant in effects, can be widely applied to modification of cement, mortar and concrete materials, and has important significance for early prevention and later maintenance of the cement, mortar and concrete.