Abstract: A process for preparing a fluororubber graft copolymer, comprising the step of graft-copolymerizing, onto (A) a fluororubber, (B) at least one organosilicon compound having the general formula (I): ##STR1## wherein R.sup.3 represents a monovalent unsaturated aliphatic hydrocarbon group; and R.sup.N represents as nitrogen-containing organic group having the general formula (II): ##STR2## or the general formula (III): ##STR3## where R.sup.4 and R.sup.5 each represent a hydrogen atom or a C.sub.1 -C.sub.15 organic group, and l is an integer of from 0 to 6, R.sup.6 and R.sup.7 have the same meaning as R.sup.3 and R.sup.4 or may form together a divalent hydrocarbon group represented by the formula:--(CH.sub.2).sub.k --where k represents an integer of 4 to 9, n represents an integer of 1 to 3, and m is an integer of from 0 to 10. The fluororubber graft copolymer has good workability in roll milling, and is vulcanizable under normal pressure.

Abstract: The curable silicone composition of this invention contains as essential components, (A) a copolymer comprised of vinylidene fluoride and/or tetrafluoroethylene component(s), (B) an organopolysiloxane having in its molecule aliphatic unsaturated groups and a fluorine-containing substituent, (C) an organohydrogenpolysiloxane, and (D) a catalyst for addition reaction. This composition can be effectively used as a release agent.

Abstract: A surface-segregatable, melt-extrudable thermoplastic composition suitable for processing by melt extrusion to form a fiber or film having a differential, increasing concentration of an additive from the center of the fiber or film to the surface thereof, which differential, increasing concentration imparts to the surface of the fiber or film at least one desired characteristic which otherwise would not be present, which composition includes at least one thermoplastic polymer and at least one defined additive. During formation of the fiber or film, the additive rapidly segregates in a controllable manner toward the newly-formed surface of the fiber or film, thereby resulting in a controllable differential concentration of the polymeric material, which concentration increases with increasing distance from the center of the fiber or film to its surface. The weight ratio of the polymer to the additive is in the range of from about 1 to about 1,000.

Abstract: A multi-stage polyorganosiloxane/polyvinyl-based graft polymer is provided by the co-homopolymerization of organosiloxanes and a vinyl-based monomer (e.g. styrene) and the subsequent graft polymerization of one or more stages of additional (meth)acrylate monomers, vinyl aromatic/(meth)acrylate comonomers or vinyl aromatic/vinyl cyanide/(meth)acrylate termonomers with or without an intermediary stage comprising a polymer.

Abstract: A non-tacky composite resin composition comprises a polyurethane having a group represented by the general formula (I) in the molecule thereof, and a polyvinyl chloride, ##STR1## where Me is a methyl group, n is an integer of 1.ltoreq.n.ltoreq.100, X and Y are respectively an integer provided that 1.ltoreq.X.ltoreq.3, 0.ltoreq.Y.ltoreq.2, and X+Y=3, and R is an alkylene group or alkylene groups which may be linked by one or more alkyleneoxy groups.

Abstract: Linear and cyclic diorganopolysiloxanes containing benzotriazole functional groups are well suited for the coating of optical fibers and for lubricating plastics, e.g., PVC.

Abstract: Thermoplastic molding compositions are provided which comprise polycarbonate resins, polyester resins and polyphenylene ether resins or various combinations thereof modified with a multi-stage polyorganosiloxane/polyvinyl-based graft (meth)acrylate polymer. When the resultant compositions are molded, impact strength, ductility, tendency to agglomerate, rubber dispersion, blend morphology, weld line strength, and thermal stability are improved with no delamination or surface mottling.

Abstract: This invention provides a mold release composition copmrising (1) a compound or a polymer having at least one of perfluoroalkyl groups having 4 to 20 carbon atoms and perfluoroalkenyl groups having 4 to 20 carbon atoms, and (2) a ladder polymer of organosilsesquioxane.

Abstract: Copolymers are formed under pressure, preferably in the presence of a surfactant having an alkylene moiety, and then post reacted with an epoxy silane. The resultant emulsion is usuable e.g. in tile adhesives and paints.

Abstract: Microporous waterproof and moisture vapor permeable products are described which are formed from a matrix having an internal microstructure which is coated with a hydrophobic material. A process is described including the steps of (1) applying to the surface of the matrix a liquid hydrophobic material, (2) allowing the liquid to penetrate into the microstructure and then (3) drying, vulcanizing or curing the product.

Abstract: A curable resin composition comprising:(A) 100 parts by weight of a rubbery organic polymer having at least one silicon-containing group to the silicon atom of which a hydrolyzable group is bonded and which is cross linkable through formation of a siloxane bond in a molecule.(B) 10 to 500 parts by weight of a vinyl chloride base resin, and(C) 1 to 150 parts by weight of a polymeric plasticizer, which has improved storage stability and is easily cured in the presence of water.

Abstract: The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and an aminoxysilicon compound and the second component comprises the same PSA and an amidosilicon compound. The method provides improved adhesive bond strength over an unmodified PSA construction.

Abstract: Organopolysiloxane compounds represented by the following general formula (I), which can fully achieve their effects as functional group when introduced as cross-linking groups into moisture cross-linkable polymers: ##STR1## (wherein R' represents methyl group or hydrogen atom; R.sup.2 represents methyl group or ethyl group; m represents an integer from 1 to 3; n represents an integer from 3 to 50; k represents 1 or 2 and l represents 2 or 3).

Abstract: The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and a hydroxy-functional diorganopolysiloxane and the second component comprises the same PSA and an acyloxysilane. The method provides improved adhesive bond strength over an unmodified PSA construction.

Abstract: A multi-stage polyorganosiloxane/polyvinyl-based graft polymer is provided by the co-homopolymerization of a silicone polymer and a polyvinyl polymer (e.g. polystyrene) and the subsequent graft polymerization of one or more stages of additional vinyl-type polymers. When the isolated multi-stage graft polymers are combined with thermoplastic resins and are molded, impact strength, weld line strength and thermal stability are markedly improved with no tendency to delaminate.

Abstract: This provides an anti-icing coating composition comprising as vehicle components:(a) a copolymer having hydroxyl, or hydroxyl and a reactive group other than hydroxyl and comprising as essential monomer components a fluoroolefin and a vinyl monomer having hydroxyl and copolymerizable with the fluoroolefin,(b) a silicone compound represented by the formula ##STR1## wherein n is an integer of 6 to 300, k is an integer of 0 to 6, h is 0 or 1, m is an integer of 0 to 6, j is 1 or 2, and Y is a) hydroxyl, or b) a group reactive with the hydroxyl or the reactive group in the copolymer (a) and selected from among (i) carboxyl, (ii) epoxy and (iii) a monovalent or bivalent group containing one or two free isocyanate groups, and(c) a polyisocyanate compound.

Abstract: The present invention relates to a paint composition which contains a silicone resin, a polytetrafluoroethylene polymer, and a polyurethane polymer in combination. The paint composition is useful as a surface coating that can be repeatedly cleaned with strong solvents and which possesses a non-stick surface.

Abstract: A composition comprising:(i) a crosslinkable thermoplastic resin;(ii) an organic peroxide crosslinking agent; and(iii) a linear polyorganosiloxane having the following recurring unit: ##STR1## wherein R is a saturated aliphatic or aromatic group and each R can be alike or different;a is about 5 to about 100;b is about 1 to about 1000; andthe polyorganosiloxane is terminated at the [CH.sub.2 ].sub.a end with --CH.dbd.CH.sub.2 or hydrogen and at the ##STR2## end with--[CH.sub.2 ].sub.a --CH.dbd.CH.sub.2 or hydrogen provided that at least one --CH.dbd.CH.sub.2 is present.

Abstract: The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and a liquid copolymeric organopolysiloxane and the second component comprises the PSA and a cure agent for the liquid copolymeric organopolysiloxane. The method provides improved adhesion over the unmodified PSA as measured by bond strength and/or the percentage of cohesive failure of the construction, which bond strength generally increases with the passage of time.

Abstract: A novel polyurethane based prepolymer useful in biomedical devices which provides high oxygen permeability and superior physical properties.

Abstract: Polycarbonate and polyester blends are prepared with a combination of modifiers comprising a multi-stage polyorganosiloxane-based graft polymer composition and a diene rubber-based graft polymer composition imparting a wide range of excellent physical properties on the PC and PE blends.

Abstract: A rubber composition obtained by compounding (B) from 0.005 to 50 parts by weight of an polyorganohydrogensiloxane and (C) from 0.00001 to 1 part by weight of a compound of a transition metal belonging to the group VIII with (A) 100 parts by weight of a rubber-forming polymer mainly comprising (I) from 3 to 70% by weight of a polyorganosiloxane represented by the formula: ##EQU1## wherein R represents a substituted or unsubstituted monovalent organic group, 0.02 to 10 mole % of which being a vinyl group; and a represents a number of from 1.900 to 2.004,and having a degree of polymerization of from 500 to 10,000 and (II) from 30 to 97% by weight of organic rubber, and subjecting the resulting compound to hydrosilylation while effecting shear deformation. The rubber composition is excellent in roll processing properties, mechanical strength, heat resistance, and low-temperature property and is suitable as oil seal and rubber hose.

Abstract: A synthetic resin composition, having a high toughness and a wear resistance, comprises a synthetic resin with solubility parameter .delta.9.5 cal1/2 cm.sup.31 3/2 or higher and a modifier with solubility parameter .delta.8.5 cal.sup.1/2 cm.sup.-3/2 or lower and dispersed therein, characterized in that a silicon containing copolyester, being a block copolymer consisting of 1.about.90% by weight of siloxane segment represented by the undermentioned general formula (A) and 99.about.1% by weight of polyester segment represented by the undermentioned general formula (B), the degree of polymerization of siloxane segment being 1.about.2,000, and that of polyester segment 1.about.1,000, is added to be mixed therewith as a dispersibility improver: ##STR1## (In this formula, m denotes a number of 1.about.2,000.) ##STR2## (In this formula, R.sub.1 designates one or two or more members selected from among aromatic divalent radicals having 6.about.12 carbon atoms or aliphatic divalent radicals having 4.about.

Abstract: Shaped articles of a crosslinked poly(vinylidene fluoride) resin can be prepared in a relatively simple process to be imparted with greatly improved resistance against heat, water, and chemicals in a much higher productivity than in the conventional electron-beam irradiation method. The method comprises the steps of (a) compounding the resin with an organosilane compound having an ethylenically unsaturated group, e.g., vinyl, and at least one alkoxy group in a molecule and a free-radical generator, e.g., organic peroxides, (b) heating the resin compound to effect graft-polymerization of the organosilane compound to the polymer molecules, (c) shaping the resin compound into a desired form, and (d) heating the shaped body in water containing a silanol-condensation catalyst dissolved or dispersed therein.

Abstract: There is provided a polymer alloy composition comprising:A. a silicone or organic polymer reactive with an unsaturated radical;B. a silicone or organic polymer that is not reactive with an unsaturated radical; andC. a compatibilizer having at least one functional group that is reactive with component (B) yet not reactive with component (A) and also having at least one unsaturated functional group.

Abstract: This invention provides cured silicone rubber or gel particles exhibiting an average size of from 0.1 to 20,000 micrometers and containing from 0.5 to 70 weight percent, based on the weight of the particle, of entrapped mineral oil. When the particles are incorporated into a liquid or solid matrix material the oil is released from the particles into the matrix at a controlled rate and serves as a lubricating agent.

Abstract: A vulcanizable rubber composition comprising (1) 100 parts by weight of a polymer composition comprising(I) a vinylidene fluoride resin,(II) at least one rubber selected from the group consisting of acrylic rubbers, .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubbers and hydrides of .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubbers, said acrylic rubber consisting of (A) 30 to 99.9% by weight of an alkyl acrylate and/or an alkoxy-substituted alkyl acrylate, (B) 0.1 to 10% by weight of a crosslinkable monomer and (C) 0 to 70% by weight of another ethylenically unsaturated compound copolymerizable with (A) and (B) (the sum of (A), (B) and (C) is 100% by weight) and said .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubber consisting of (D) 10 to 60% by weight of an .alpha.,.beta.

Abstract: Curable fluororubber compositions exhibit excellent processability on roll mills and can be molded without sticking to or staining the mold surfaces when the composition contains from 0.1 to 30 weight parts per 100 weight parts of fluororubber of a finely divided cured silicone material in the form of a rubber, gel or resin. An epoxy-substituted alkoxysilane or a partial hydrolysis product thereof is present as an ingredient of the curable composition when it is desired to cohesively bond the cured fluororubber to a metal or plastic substrate.

Abstract: A curable composition at room temperature comprising (A) 100 parts by weight of a hydrolyzable silyl group-containing vinyl polymer, (B) 0.1 to 100 parts by weight of a specific silane compound and (C) 0 to 20 parts by weight of a curing catalyst, the silane compound (B) being a silane compound selected from ##STR1## The composition is excellent in not only adhesion to melamine alkyd or malamine acrylic resin coatings but also hardness, solvent resistance and staining resistance.

Abstract: Polybend interdispersions of two or more different polymers formed at least partially in the presence of an interdispersing aid which can be polytetrafluoroethylene or ultra high molecular weight polyethylene; said blend can be chemically cross-linked with peroxides.

Abstract: This invention relates to films made from vinylidene chloride copolymers. Specifically, this invention relates to a method and compositions for lowering the oxygen permeability and enhancing the thermal stability and enhancing the melt shear stability of monolayer and multilayer packaging films having a layer of vinylidene chloride copolymer film by adding an organic silicon polymer to the vinylidene chloride copolymer. The conventional stabilizer/plasticizer combination of epoxy resin and 2-ethyl-hexyl diphenyl phosphate may be eliminated from the vinylidene chloride copolymer.

Abstract: The primer composition of the invention is particularly useful as an undercoating composition for a protective overcoating formed with a silicone-based coating composition containing a colloidal silica powder in respect of the excellent adhesion, heat resistance, resistance against hot water and weatherability of the overcoating layer.

Abstract: A thermoplastic resin composition comprises a resin dispersion which includes a thermoplastic resin component having a solubility parameter .delta. of at least 9.5 cal.sup.1/2 cm.sup.-3/2, a modifier component having a solubility parameter .delta. of not higher than 8.5 cal.sup.1/2 cm.sup.-3/2, and a dispersibility improver comprising a silicon-containing polyacetal copolymer having (i) a siloxane segment derived from 0.01 to 30 wt. % of a terminal-reactive silicone oil of the following general formula I: ##STR1## wherein R.sub.1 represents an alkyl or phenyl group, R.sub.2 represents a divalent organic group, X represents a group selected from the group consisting of --NH.sub.2, --OH, ##STR2## --R.sub.4 OH, --R.sub.5 COOH, --R.sub.6 COOR.sub.7, --R.sub.8 and --OR.sub.9, R.sub.3 represents a divalent organic group, R.sub.4 to R.sub.6 each represent an alkylene group having 1 to 10 carbon atoms, R.sub.7 to R.sub.

Abstract: A curable polymer composition comprising:(A) an organic elastomeric polymer having, in a molecule, at least one silicon-containing group which is cross linkable through formation of a siloxane bond and(B) an epoxy resin which has been cured which is easily handled and affords a cured product having improved strength.

Abstract: Curable fluororubber compositions comprising an organic fluororubber, an organopolysiloxane gum and an epoxy-containing organoalkoxysilane or partial hydrolyzate thereof, a reinforcing filler and an organoperoxide are characterized by excellent roll workability during roll milling and can be cured to yield a fluororubber which undergoes little deterioration in its mechanical properties at low temperatures.

Abstract: A vinylidene fluoride-based polymer-containing coating composition provides coatings having weather resistance, chemical stability, surface lubricity, and enhanced adhesion to substrates. The composition comprises:(a) a vinylidene fluoride-based polymer;(b) an acrylic polymer containing hydrolyzable silyl groups and isocyanate groups; and(c) at least one organic solvent.

Abstract: A process for producing a semi-interpenetrating polymer network of polytetrafluoroethylene and silicone elastomers is described which comprises the steps of (1) intimately blending a mixture of a major amount of unsintered and unfibrillated particulate polytetrafluoroethylene dispersion resin and minor amounts of (A) a hydrocarbon liquid and (B) an addition curable silicone composition consisting essentially of a polydiorganosiloxane having alkenyl unsaturation, an organohydrogenpoly-siloxane crosslinking agent, a catalyst for promoting crosslinking of said polysiloxane, and an inhibitor for the catalytic reaction; (2) forming said blend into an extrudable shape; (3) biaxially extruding said blend through a die into a shaped extrudate product having a randomly fibrillated structure; (4) evaporating said hydrocarbon liquid, and activating said catalyst so as to generate a cured silicone elastomer and polytetrafluoroethylene semi-interpenetrating polymer network comprising said fibrillated extrudate structure.

Abstract: A rubber composition that is prepared by reacting an organic peroxide, under shear deformation, with 3-70 parts by weight of silicone rubber (I), 30-97 parts by weight of a saturated elastomer (II) that substantially fails to be crosslinked with an organic peroxide when it is used alone, and 0-20 parts by weight of another elastomer (III) that is co-crosslinkable with component (I) in the presence of an organic peroxide and which is also co-crosslinkable or highly miscible with component (II) [where (I)+(II)+(III)=100 parts by weight].

Abstract: A surface-segregatable, melt-extrudable thermoplastic composition suitable for processing by melt extrusion to form a fiber or film having a differential, increasing concentration of an additive from the center of the fiber or film to the surface thereof, which differential, increasing concentration imparts to the surface of the fiber or film at least one desired characteristic which otherwise would not be present, which composition includes at least one thermoplastic polymer and at least one defined additive. During formation of the fiber or film, the additive rapidly segregates in a controllable manner toward the newly-formed surface of the fiber or film, thereby resulting in a controllable differential concentration of the polymeric material, which concentration increases with increasing distance from the center of the fiber or film to its surface. The weight ratio of the polymer to the additive is in the range of from about 1 to about 1,000.

Abstract: A stabilized surface-segregatable, melt-extrudable thermoplastic composition suitable for processing by melt extrusion to form a fiber or film having a differential, increasing concentration of a siloxane-containing primary additive from the center of the fiber or film to the surface thereof, which differential, increasing concentration imparts hydrophilicity to the surface of the fiber or film, which composition includes at least one thermoplastic polymer, at least one siloxane-containing primary additive, and at least one siloxane-containing stabilizing additive. During formation of the fiber or film, the primary additive rapidly segregates in a controllable manner toward the newly-formed surface of the fiber or film, thereby resulting in a controllable differential concentration of the primary additive, which concentration increases with increasing distance from the center of the fiber or film to its surface. The weight ratio of the polymer to the additive is in the range of from about 1 to about 1,000.

Abstract: A curable composition. The composition contain(A) a copolymer that has silicon-containing functional groups capable of crosslinking by forming siloxane bonds and whose molecular chain consists substantially of:(1) an alkyl acrylate ester monomeric unit and/or an alkyl methacrylate ester monomeric unit, the alkyl of each being 1 to 8 carbon atoms; and(2) an alkyl acrylate ester monomeric unit and/or an alkyl methacrylate ester monomeric unit, the alkyl of each being at least 10 carbon atoms;(B) an oxyalkylene polymer having silicon-containing functional groups that are capable of crosslinking by forming siloxane bonds; and(C) at least one compound selected from(i) a hydrolyzable organic silane monomer represented by the formula (I):R.sup.1.sub.4-n SiX.sub.nwherein X is a hydrolyzable group, R.sup.1 is a monovalent organic group having 1 to 18 carbon atoms, n is an integer of 1 to 4, and each R.sup.1 or X can be the same or different when two or more R.sup.

Abstract: The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA modified with an alkoxy-functional silicon compound and the second component comprises the same PSA modified with a cure agent for the alkoxy-functional silicon compound. The method provides improved adhesive bond strength over the unmodified PSA which generally increases with time.

Abstract: A heat and oil resistant insulating composition for use as an insulating layer of an electric insulating wire, a material for an extrusion mold and an insulating layer of a cord-shaped heater, comprising an ethylene tetrafluoride-propylene copolymer, a methacrylic ester or acrylie ester as a cross-linking auxiliary and an organic peroxide as a cross-linking agent.The composition is cross-linked under the atmospheric pressure.

Abstract: There is provided a composition having interpenetrating matrices comprising (a) a first polymer network characterized by nodes interconnected by fibrils and (b) a second polymer network comprising diorganosiloxy units. In another aspect, there are provided compositions comprising an interpenetrating polymer network of polytetrafluoroethylene and polydiorganosiloxane. Methods for making the foregoing compositions are also provided.

Abstract: A process for the manufacturing of plastisol based synthetic coverings (e.g. floor or wall coverings) having improved resistance to soiling; and the product produced from the process is presented. The synthetic covering utilizes a wear layer formed from a mixture comprising at least one silicone polymer and a cross-linking agent. Preferably, this mixture also includes a catalyst. The mixture is deposited onto a conventional support as a wear layer. The silicone polymer is then cross-linked and the wear layer undergoes pre-gelling and gelling.

Abstract: A coating composition, containing a fluoropolymer, a film-forming adjuvant resin which is different from the fluoropolymer and adapted to react with the group represented by F in the functional organosilane of formula I and which is selected from the group consisting of acrylic resins, polyepoxide resins, polyester resins, aminoplast resins and mixtures thereof; and an amount effective to promote adhesion of a functional organosilane represented by formula I: ##STR1## wherein A represents an organo group containing from 1 to 18 carbon atoms,G represents an organo group containing from 2 to 10 carbon atoms,X represents a hydrolyzable group; andb is an integer from 0 to 2, andF represents amino, polyamino, glycidoxy, mercapto, cyano, allyl, vinyl, urethano, halo, isocyanato, ureido, imidazolinyl, acrylato or methacrylato.

Abstract: Particulate, multiphase polymers which have a core (A) and an overlying shell (B) wherein the core (A) is an organic, resinous polymer comprising polymerized olefinically unsaturated monomer units having softening point temperatures of at least 30.degree. C. and wherein the shell (B) is an organopolysiloxane are obtained by producing in a first stage an organic resinous polymer in latex form by emulsion polymerization and, in a second stage, the latex particles of the first stage are surrounded with a shell (B) organopolysiloxane by polymerizing low molecular weight organosiloxanes in the presence of the latex particles of the first stage.

Abstract: A coating composition comprising a fluorine-containing copolymer containing at least 10% by weight of fluorine based on fluoroolefin units, being soluble in a solvent and having curable reactive sites, and a polyfunctional organic silicon compound having at least one isocyanate group directly bonded to a silicon atom.

Abstract: Particulate, multiphase polymers which have a core (A) and an overlying shell (B) wherein the core (A) is an organic, rubber-like polymer comprising polymerized olefinically unsaturated monomer units having softening point temperatures below 0.degree. C. and wherein the shell (B) is an organopolysiloxane are obtained by producing in a first stage an organic rubber-like polymer in latex form by emulsion polymerization and, in a second stage, the latex particles of the first stage are surrounded with a shell (B) or organopolysiloxane by polymerizing low molecular weight organosiloxanes in the presence of the latex particles of the first stage.

Abstract: Storage stable, one part organosiloxane compositions that cure upon heating by a platinum-catalyzed hydrosilation reaction comprise, in addition to the organosiloxane reactants, a platinum-containing hydrosilation catalyst that is microencapsulated within one or two layers of thermoplastic organic polymers. The microcapsules are formed using known techniques.