Abstract: A process for enhancing the fabrication of thermoplastic polymers entailing the addition of from 0.01 to 1 part, per hundred parts of thermoplastic polymer, of a processing aid, said processing aid comprising a processing additive, such as a silicone or a polyol, and a processing adjuvant, such as a phosphate.

Abstract: High-functionality compositions based on fluorinated and silanized polyisocyanates, prepared by reacting a hydroxy-terminated perfluoropolyether having an average molecular weight ranging from 500 to 7000 and a silico-carbinol having an average molecular weight ranging from 500 to 7000, with an organic diisocyanate and a polyol having a functionality of at least 3. Varnishes containing said compositions based on fluorinated and silanized polyisocyanates, having a high functionality.

Abstract: Thermoplastic compositions and composites are produced which have fewer and smaller voids with more consistent dimensions compared to conventional unreinforced and fiber reinforced thermoplastics. The high modulus thermoplastic contains silicone semi-interpenetrating polymer networks which are formed by vulcanization within the thermoplastic and initiated during melt processing. Parts molded from the compositions are more homogeneous, with evenly distributed voids, thus reducing the possibility of strss fractures. The compositions are particularly useful in the molding in thick cross-section and variable thickness parts and have been found to have increased thermal stability.

Abstract: The extrudability of linear polymers of ethylene such as low density copolymers of ethylene and C.sub.4 -C.sub.10 olefins (LLDPE) into thin films is improved by adding small amounts, e.g. 250 to 1000 ppm of each of a fluorocarbon polymer, e.g. polyvinylidene fluoride, and of a polyalkylsiloxane, e.g. poly(methyl-octyl-siloxane), to reduce melt fracture, head pressure and extruder power.

Abstract: A curable composition comprising (A) an organic polymer containing at least one reactive silicon functional group crosslinkable to produce an elastomer by the formation of a siloxane bond in its molecule and (B) an organic silicon compound having a molecular weight of not less than 140 and represented by the formula (1):[(CH.sub.3).sub.3 SiO].sub.n R.sup.1 (1)wherein R.sup.1 is a residue of an alcohol or a weak acid which has a valency of n, and n is a positive integer. The composition of the invention can give cured product having excellent modulus and elongation as well as has excellent storage stability.

Abstract: Silicone containing paint compositions containing aqueous dispersions of(a) organopolysiloxanes; and(b) an ethylene-vinyl chloride copolymer which does not exceed the weight of the organopolysiloxanes.

Abstract: High modulus thermoplastic compositions and composites are produced which exhibit enhanced melt integrity and strength, allowing the composites to be melt-drawn to smooth surfaced, high tolerance profiles, such as thin-walled tubing, wire, coatings, films, etc. The melt integrity is improved by adding to the thermoplastic prior to or during thermoplastic melt processing a silicone component which will be vulcanized within the thermoplastic to form a silicone semi-interpenetrating polymer network initiated during the melt processing of the thermoplastic. The composition contains about 0.1 to 20, and preferably about 1 to 4 weight percent of the silicone network, and may also contain fibrous reinforcement and/or filler/modifiers.

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 organohydrogenpolysiloxane and the second component comprises the same PSA and a cure agent for the liquid organohydrogenpolysiloxane. The method provides improved adhesive bond strength over the unmodified PSA, which bond strength generally increases with the passage of time.

Abstract: A silicone rubber composition composed of a high-molecular diorganopolysiloxane, a reinforcing silica filler and an organic peroxide as a curing agent is further compounded with a fluorine-containing low-polymeric compound such as poly(chlorotrifluoroethylene) and perfluorinated polyether compound of the formula F--[--CF(CF.sub.3)--CF.sub.2 --O--].sub.v --O--CF.sub.2 --CF.sub.3, in which v is 2 to 100, as well as fluoroalkyl-substituted organopolysiloxanes. The silicone rubber composition can give a cured silicone rubber product having greatly improved resistance against dynamic fatigue as in repeated cycles of stretching and relaxation.

Abstract: A chemically modified and activated, hydroxyl-group-containing, natural or synthetic, polymeric solid body surface is disclosed, as well as a process for the activation of such solid body surfaces by means of organo-silanes and, if necessary, homo- or heterobifunctional reagent. The surfaces are used for the stable, simple and economical binding of proteins, nucleic acids, low-molecular ligands, cells, microorganisms and other biological materials, in biology, biotechnology and medicine.

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: The modification of thermoplastic polymers with a combination of azidosilanes and monolefinically unsaturated monomers and subsequent crosslinking by moisture.

Abstract: Amorphous moisture-curable, halosilane-substituted polymers having a saturated carbon backbone and a viscosity average molecular weight of between about 500 and about 20,000 provide desirable protection for weatherable substrates upon curing. Also disclosed are coating compositions containing such halosilane-substituted polymers; a method of protecting weatherable substrates employing such compositions; and composites produced by the method disclosed herein.

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.

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: Silane-crosslinkable halogenated polymer composition and process of crosslinking the same.The silane-crosslinkable halogenated polymer composition contains a mixture including: 100 parts by weight of a halogenated polymer and about 0.1-20 parts by weight of an amino group-containing organic silane compound. The halogenated polymer composition silane-crosslinked is useful for the sheath and insulation of electric wires and cables and other moldings such as a hose.

Abstract: A membrane for selectively separating gases having high and selective permeability for oxygen and sufficient strength which is capable of extracting and concentrating oxygen in a mixed gases, especially in the air, and is produced from a novel poly(disubstituted acetylene)/polyorganosiloxane graft copolymer where the main chain is composed of poly(disubstituted acetylene) and the side chain is composed of polyorganosiloxane, and the copolymer.

Abstract: Storage stable, water-free, RTV organopolysiloxane adhesives curable in the presence of water or atmospheric moisture, and comprising a dihydroxydiorganopolysiloxane polymer, fillers, an amine fraction and a curing catalyst, are characterized by incorporation therein of a polyalkoxylated organosilane having the formula:R'.sub.x Si[(OCH.sub.2 CH.sub.2).sub.p OCH.sub.3 ].sub.4-xwherein R' is methyl, vinyl, allyl, methallyl or phenyl, and p and x are each one or two.

Abstract: An organosiliconic fluid composition, suitable for use in sealants, formed by a liquid phase and by a solid and insoluble polymeric phase, dispersed in said liquid phase, is obtained by polymerizing, under the influence of free-radical initiators, styrene, or a mixture of styrene with at least one other vinyl-containing monomer, the polymerization being carried out in the presence of a liquid polyoxypropylenediol-.alpha.,.omega.-bis-allyl silylate having formula (I): ##STR1## or in the presence of a liquid polycarbonate of polyoxypropylenediol-.alpha.,.omega.-bis-allyl silylate having formula (II): ##STR2## wherein: R is an alkyl radical,X is a hydrolyzable radical selected from alkoxy, aminooxy and acyloxy radicals,y is 0, 1 or 2,p is a number ranging from about 10 to about 100,m and n are numbers such as to give to compounds (I) and (II) a molecular weight value, or an average molecular weight value, of from 2000 to 20,000.

Abstract: A process for preparing a pressure sensitive adhesive comprising:(A) an organic polymer having in its molecule at least one reactive silicon-containing group represented by the formula (I): ##STR1## wherein R.sup.2 is a monovalent hydrocarbon group having 1 to 20 carbon atoms or a triorganosiloxy group having the formula (II):(R').sub.3 SiO-- (II)in which R' is a monovalent hydrocarbon group having 1 to 20 carbon atoms and may be the same or different, X is hydroxyl group or a hydrolyzable group, and may be the same or different when 2 or more X groups are attached, a is 0 or an integer of 1 to 3, b is 0, 1 or 2, and m is 0 or an integer of 1 to 18, and(B) 0.1 to 20 parts by weight of, per 100 parts by weight of the organic polymer, at least one curing catalyst selected from the group consisting of an organic aluminium and an organic zirconium. The composition has excellent heat resistance and releasability from substrates, e.g. a release paper coated with a silicone release agent.

Abstract: Nonmetallic bearing compositions contain a polyetherimide resin and, as a modifier, a fluoropolymer, such as polytetrafluoroethylene. The present compositions can be fabricated into a variety of shapes by injection molding, and have excellent wear resistance, load-bearing capabilities, and low coefficients of friction without the use of external lubrication.

Abstract: Rubber compounds comprising a specific type of polyorganosiloxane of the following formula ##STR1## in which R and R' independently represent a hydrocarbon substituent and n is an integer of not smaller than 3 provided that at least 6 mole % of the substituents R and R' consists of a hydrocarbon group having Small's molecular attraction constant not smaller than 350. Carbon black is added to the polyorganosiloxane whereby various physical properties are improved including breaking strength, water and hot water resistances. The rubber compound may further comprise at least one organic rubber other than the above polyorganosiloxane.

Abstract: An improved process for molding and vulcanizing rubber products using a curing bladder, characterized in that the bladder is one which is made of a rubber compound containing (A) organic rubber and (B) polyorganosiloxane, the ratio of (A)/(B) being 95/5 to 5/95, or the bladder is one which is produced by surface treating (A) organic rubber with a silicone composition containing (A) organic rubber and (B) polyorganosiloxane, said polyorganosiloxane comprising at least two monovalent substituted or unsubstituted hydrocarbon groups having five or more carbon atoms and a C.dbd.C double bond connected to the silicon atom through at least one carbon atom, and having a degree of polymerization greater than 20.

Abstract: A crosslinkable thermoplastic polymeric composition comprising a component inherently adapted for crosslinking by thermal or chemical treatment e.g. a peroxide-containing polyolefin component or a silane-modified polyolefin and a fluorocarbon polymer. The composition can be thermoformed to produce useful articles e.g. cable insulation and the presence of the fluorocarbon polymer (e.g. a copolymer of vinylidene fluoride and hexafluoropropylene) results in the articles having improved surface finish.

Abstract: The room temperature-curable organopolysiloxane composition of the invention capable of giving a cured rubber can be used advantageously as an insulating material in electric and electronic instruments without causing troubles in contact points which is unavoidable with conventional compositions. The inventive composition is formulated with (a) a diorganopolysiloxane terminated at the molecule molecular chain ends each with a silanolic hydroxy group, (b) an alkenyloxy, e.g. isopropenyloxy, containing silane and (c) a guanidino-substituted organosilicon compound and these components are specified either by the upper limit of the content of low molecular constituents having a specified vapor pressure or higher or the upper limit of the vapor pressure of the compound per se so that the electric contact points near the insulation with the composition are free from exposure to the vapor of organosilicon compounds which may be deposited as an oxide of silicon by sparks.

Abstract: The detrimental effects of reinforcing fibers on the differential shrinkage and warpage characteristics of thermoplastic resins are substantially reduced by the incorporation of a silicone interpenetrating polymer network in fiber reinforced thermoplastic composites. High modulus (flexural modulus greater than 90,000 psi) thermoplastic matrices containing about 5 to 60 weight percent reinforcing fibers and 1 to 20 weight percent of a silicone IPN have reduced shrinkage and warpage and more isotropic mold shrinkage than conventional fiber reinforced thermoplastics, and are particularly useful in the melt forming of high tolerance parts, such as gears, as well as thin walled, variable thickness and thick cross section parts.

Abstract: Compounds of formula I or II ##STR1## wherein R.sup.1 and R.sup.2 are hydrogen, alkyl, cyclohexyl, phenyl, benzyl or tolyl, or are a --CH.sub.2 --CHR.sup.3 --CH.sub.2 --S--CO--R.sup.4 radical, R.sup.3 is hydrogen or methyl, R.varies.is alkyl, cyclohexyl, phenyl, benzyl or tolyl, X is alkylene, --S--, --SO--, --SO.sub.2 -- or substituted alkylene, in which R.sup.5 and R.sup.6 are hydrogen or alkyl, and n is an integer from 1 to 10, can be used as latent hardeners for epoxy resins.The compositions containing epoxy resins and these hardeners are particularly suitable for use as single component adhesive formulations. The cured products have good hot water resistance.

Abstract: Disclosed are moisture-curable compositions based on (A) ungelled, partial hydrolyzates or organosilicon-containing materials in combination with (B) acrylic addition interpolymers containing hydrolyzable silyl groups.The organosilicon-containing material for preparation of the ungelled partial hydrolysis product has an average functionality based on easily hydrolyzable Y groups attached to silicon atoms of greater than or equal to 2.4 and contains greater than or equal to 10 mole percent of at least one organosilane compound corresponding to the formula R-Si-Y.sub.3. The partial hydrolysis product is prepared using a controlled amount of water.The acrylic addition interpolymer is not particularly limited provided that it contains at least one silicon atom directly bonded to a hydrolyzable group and is compatible with the ungelled partial hydrolysis product.

Abstract: Room temperature vulcanizable organopolysiloxane compositions are provided based on the use of a silanol or alkoxy terminated organopolysiloxane and an effective amount of a diorganotin dicarboxylate and an amine accelerator.

Abstract: Novel organopolysiloxanes are described in which the organopolysiloxanes are terminated by units of the formula R.sub.3 SiO.sub.1/2 and comprise units of the formulas RR.sup.1 SiO, RR.sup.2 SiO, RR.sup.3 SiO, RHSiO and R.sub.2 SiO, where R represents the same or different alkyl radicals having from 1 to 4 carbon atoms per radical, or phenyl radicals, R.sup.1 represents the same or different alkyl radicals having at least 6 carbon atoms per radical, R.sup.2 represents the same or different aralkyl radicals and R.sup.3 represents the same or different, SiC-bonded, monovalent organic radicals having at least one vicinal epoxy group per radical. These organopolysiloxanes are preferably prepared by reacting organopolysiloxanes which contain units of the formulas R.sub.3 SiO.sub.1/2 and RHSiO and optionally units of the formula R.sub.2 SiO, wherein R is the same as above, with an organic compound that has a terminal C.dbd.

Abstract: A pressure sensitive adhesive composition comprising:(A) an organic polymer having in its molecule at least one reactive silicon-containing group represented by the formula (I): ##STR1## wherein R.sup.2 is a monovalent hydrocarbon group having 1 to 20 carbon atoms or a triorganosiloxy group having the formula (II):(R').sub.3 SiO-- (II)in which R' is a monovalent hydrocarbon group having 1 to 20 carbon atoms and may be the same or different, X is hydroxyl group or a hydrolyzable group, and may be the same or different when 2 or more X groups are attached, a is O or an integer of 1 to 3, b is 0, 1 or 2, and m is O or an integer of 1 to 18, and(B) 0.1 to 20 parts by weight of, per 100 parts by weight of the organic polymer, at least one curing catalyst selected from the group consisting of an organic aluminum and an organic zirconium. The composition has excellent heat resistance and releasability from substrates, e.g. a release paper coated with a silicone release agent.

Abstract: A composite polymeric material having a high permeability to oxygen is proposed comprising a vinyl chloride moiety, an organosilicon moiety and, optionally, a third polymeric moiety. Such a composite polymeric material can be prepared in several ways including copolymerization of vinyl chloride monomer, a polymerizable organosilicon compound and, optionally, a third monomer, graft-polymerization of a polymerizable organosilicon compound on to a polyvinyl chloride resin, graft-polymerization of vinyl chloride on to an organopolysiloxane, graft-copolymerization of vinyl chloride and a polymerizable organosilicon compound on to a third polymer and blending of the respective polymeric components.

Abstract: Novel block copolymers are provided, comprising poly(oxazoline) blocks and polysiloxane blocks. Novel polysiloxane intermediates for preparing such block copolymers are also provided which contain benzyl halide terminal groups. The block copolymers are useful as surface-modifying additives for base polymers.

Abstract: A silicone elastomer composition which has novel crosslinking points comprises (A) 100 parts by weight of a polyorganosiloxane of a polymerization degree of at least 20, wherein the organic groups are selected from monovalent substituted and unsubstituted hydrocarbon groups and are attached to silicon atom, and at least two of the organic groups are monovalent hydrocarbon groups possessing at least five carbon astoms and a carbon-carbon double bond bonded to a silicon atom via at least one carbon atom, (B) 5 to 200 parts by weight of an inorganic filler having a specific surface area of at least 50 m.sup.2 /g, and (C) 0.1 to 25 parts by weight of a vulcanizer selected from the group consisting of sulfur, sulfur donor, substituted or unsubstituted alkylphenol resins, and quinoids.

Abstract: A curable resinous composition comprising:(A) an organic elastomeric polymer having at least one silicon-containing reactive group in a molecule,(B) an epoxy resin,(C) a silicone compound having a silicon-containing group and a functional group reactive with an epoxy group, and(D) a curing agent for the epoxy resin, wherein said silicon-containing reactive group is a group of the formula: ##STR1## wherein X is a hydroxyl group or a hydrolyzable group, R.sup.1 is a monovalent hydrocarbon group having 1 to 20 carbon atoms or an organosiloxy group, "a" is 0, 1, 2, or 3, "b" is 0, 1 or 2 provided that the total of "a" and "b" is at least 1, and "m" is 0 or an integer of 1 to 18, a weight ratio of (A) to (B) being from 1:100 to 100:1 and a weight ratio of (A)+(B) to (C) being from 100:0.1 to 100:20.

Abstract: A curable composition comprising an organic polymer containing at least one silicon-containing hydrolyzable group in the polymer molecule, an acid phosphoric acid compound and an organozirconium compound. The curable composition can be rapidly cured and has an improved pot life both in open system and in closed system.

Abstract: The room temperature-curable organopolysiloxane composition of the invention is characteristic in the remarkably increased adhesive bonding strength of the rubber of the composition to the surface of a substrate of metals, plastics and others on which the composition has been cured. The composition is also advantageous in the improved thixotropy despite the admixture of an adhesion improver mentioned below. Thus, the composition comprises, in addition to conventional components in a deacidification type room temperature curable organopolysiloxane composition, a specific organic silicon compound represented by the general formula(R.sup.3 O).sub.b (MeCOO).sub.3-b Si--O--R.sup.4 --O--Si(OCOMe).sub.3-b (OR.sup.3).sub.b,in which R.sup.3 is a monovalent hydrocarbon group, R.sup.4 is a divalent hydrocarbon group or a polyoxyalkylene group of the formula --C.sub.x H.sub.2x --O).sub.n C.sub.x H.sub.2x --, x being 2 to 4 and n being a positive integer, and b is 1 or 2.

Abstract: The room temperature-curable (RTV) organopolysiloxane composition of the invention comprises, in addition to the conventional components of a diorganopolysiloxane terminated at both molecular chain ends each with a silanolic hydroxy group, a hydrolyzable organosilicon compound having two or more hydrolyzable groups in a molecule and a filler, an organosilicon-modified polyoxyalkylene compound, of which the organosilicon-containing terminal groups have at least one hydrolyzable group so as to pertain to the crosslinking reaction in its part. By virtue of this unique additive component, the composition is quite free from the disadvantage of sagging when the composition is applied to building works and the like and still retains excellent adhesive properties to the substrate surface in contrast to the difficulty in the conventional RTV compositions in which reducing of the phenomenon of sagging and retention of the strong adhesive strength are hardly compatible.

Abstract: Disclosed is a curable composition containing (1) a resin containing at least one air-oxidizable group and at least one epoxy group, and (2) a compound having in a molecule thereof at least one epoxy-reactive moiety and at least one silicon atom directly bonded to a group Y wherein Y represents a hydrolyzable group.

Abstract: There is provided a graft copolymer comprising poly(vinyl chloride) polymer having grafted thereto a silicone polymer. Methods for making such graft copolymers are also provided.

Abstract: Fast curing resin coating compositions for coating metal surfaces and a one-step method are described. The coatings comprise a high molecular weight epoxy resin, although a portion thereof may be low molecular weight, an effective amount of a cross-linking agent for the epoxy resin, a polysiloxane resin system, an effective amount of a curing agent for the polysiloxane fluid system, a fluorocarbon polymer, and the balance being suitable solvents. The coatings are applied in one-step and dry in less than one minute and may be formed into various shapes and forms useful for stovetop cookware.

Abstract: A rubber composition capable of giving a non-tacky vulcanized rubber can be obtained by mixing 98 to 80% by weight of at least one organic rubber selected from natural rubber and organic synthetic rubbers and 2 to 20% by weight of a silicone raw rubber having a molecular weight of 100,000 to 1,000,000. A conveyor belt in which at least the surface layer is composed of a vulcanizate of this rubber composition is suitable for carrying highly tacky substances such as oil sand.

Abstract: Adhesive compositions, which comprise (A) a polyester polyol, polyester polyurethane polyol or their mixture, (B) a silane coupling agent, (C) a vinyl-chloride copolymerization resin, (D) a diene synthetic rubber and (E) an organic polyisocyanate.The adhesive compositions can be used as adhesives for plastic films, such as nylon, tetron and polyolefins, aluminum foil, etc., and offers particularly excellent adhesion toward metallized films, whereby the resultant bonded films, even when boiled in an alkali or acid atmosphere, remain free from discoloration or disappearance in the metallized layers.

Abstract: There is provided a one package RTV composition which is convertible to a tack-free elastomer comprising:(A) a polydiorganosiloxane base polymer,(B) an effective amount of a condensation catalyst, and(C) a stabilizing amount of organic scavenger for hydroxy groups which has the formula:R--N.dbd.C.dbd.O).sub.xwhere R is a linear or cyclic aliphatic compound or an aromatic compound, and x equals at least 1.

Abstract: Water-curable, silane modified chlorosulfonated olefinic polymers, particularly desirable for use as coverings about wires and cables, produced by reacting a mixture containing a chlorosulfonated olefinic polymer and a hydrolyzable silane having cyclic oxygen, sulfur or nitrogen functionality.

Abstract: A method is disclosed for enhancing at least one of the mechanical properties of a partially crystalline thermoplastic by forming a dispersion of a polydiorganosiloxane within the thermoplastic, and extending the resultant dispersion. Ultimate tensile strength, modulus, and ultimate elongation can be enhanced in comparison with the same thermoplastic with no added polydiorganosiloxane and no extension.

Abstract: Molding compositions which are based on vinyl chloride polymers and give shaped articles, for example sheeting, with a pronounced white fracture effect which occurs in clear contours are described. The molding compositions essentially consist of vinyl chloride polymers as the main component and a relatively small amount of solid and/or liquid polyorganosiloxanes.

Abstract: This invention relates to water-curable, silane modified copolymers of an alkyl acrylate and a monomer having the formula: ##STR1## wherein X is hydrogen or chlorine and Y is chlorine, a phenyl radical or cyano. The water-curable, silane modified copolymers have enhanced properties which makes them suitable for use as extrudates, serving as jacketing and insulation about wire and cables.

Abstract: Homogeneous compositions comprising certain liquid silicone resins, certain silicon-free, film-forming organic polymers and a compatibilizing liquid and a method for preparing preferred homogeneous compositions wherein the compatibilizing liquid is water are disclosed. The homogeneous compositions are useful for coating a substrate to provide a water-resistant coating on the substrate which can function, for example, as a protective coating or as an adhesive-release coating and; accordingly, a method for coating a substrate, such as paper, is also disclosed.

Abstract: The invention provides a novel resin composition based on a polyphenylenesulfide resin which can be molded into shaped articles imparted with remarkably improved impact strength, cracking resistance and heat shock resistance. The inventive resin composition comprises 100 parts by weight of a polyphenylenesulfide resin, from 10 to 300 parts by weight of an inorganic filler and from 1 to 100 parts by weight of a fluorine-containing rubber such as a copolymer of vinylidene fluoride and hexafluoropropylene having specified Mooney viscosity.