Abstract: Use of an effective amount of a specific combination of silicone compounds comprising the combination: of at least one functionalized polyorganosiloxane (abbreviated as POS) containing, per molecule, at least one functional siloxy unit (abbreviated as UN1) capable of binding chemically and/or physically with the hydroxylated surface sites of the silica particles, and of at least one functionalized organosilane (abbreviated as OS) containing, per molecule, at least one functional group (abbreviated as G1) capable of binding chemically and/or physically with the UN1 units and/or the hydroxylated sites of the silica particles and at least one other functional group (abbreviated as G2) capable of binding chemically and/or physically to the elastomer chains, as silica/elastomer coupling agent in the natural or synthetic elastomer compositions comprising a siliceous material as reinforcing filler intended for the manufacture of an article made of elastomer(s).

Abstract: A method for producing a saturated siloxane polymer is provided. In one aspect, the method comprises hydrogenating an aromatic siloxane monomer by contacting it with hydrogen in a temperature of 100° C. to 200° C. and a hydrogen pressure of 1000 to 2000 psi for 1 to 6 hours in the presence of a hydrogenation catalyst to produce a hydrogenated siloxane monomer, and anionically polymerizing the hydrogenated siloxane monomer.

Abstract: A peroxide-curable fluorine-containing elastomer composition comprising 100 parts by weight of a fluorine-containing block polymer comprising at least one elastomeric polymer chain segment and at least one non-elastomeric polymer chain segment in which the content of said non-elastomeric polymer chain segment is less than 5% by weight, 0.05 to 10 parts by weight, preferably 0.3 to 5 parts by weight, more preferably 1 to 5 parts by weight, of an organic peroxide, and 0.1 to 10 parts by weight, preferably 0.5 to 8 parts by weight, more preferably 0.5 to 5 parts by weight, of a polyfunctional co-crosslinking agent. This composition has improved processing properties during curing and molding, while it has good tensile properties, heat resistance, oil resistance and high temperature sealing properties comparable to those of conventional peroxide-curable fluorine-containing elastomer compositions.

Abstract: This invention is a silicone oil gel composition which is comprised of a silicone block copolymer selected from the group consisting of polyethylene-polydimethylsiloxane block copolymers and polystyrene-polydimethylsiloxane block copolymers wherein the overall number average molecular weight is from 2000 to 251,000, the polystyrene content (PSC) is 40% or less by weight, the polystyrene block number average molecular weight is from 1000 to 30,000, and the polyethylene number average block molecular weight is from 1000 to 20,000, the polydimethylsiloxane number average molecular weight is from 1000 to 250,000, wherein the block copolymer is dissolved in a silicone oil which is a cyclic or linear siloxane monomer. Preferred siloxane monomers for use herein are (Me2SiO)3, (Me2SiO)4, and (Me2SiO)5.

Abstract: An acid-resistant, thermoplastic resin composition which is nonpoisonous and non-halogen and has an acid-resistance for a long period of time, the acid-resistant, thermoplastic resin composition containing a thermoplastic resin, 30 to 70% by weight of magnesium hydroxide which has a specific surface area of 20 m2/g or less and an average secondary particle diameter of 0.2 to 5.0 &mgr;m and is surface-treated with at least one surface-treating agent selected from a water-soluble silane-coupling agent, a phosphoric acid ester, a higher fatty acid or its alkali metal salt, and 1 to 20% by weight of a reaction type compatibilizing agent.

Abstract: The synthesis and characterization of novel multi-arm, polyisobutylene-based star-block polymers comprising a plurality of polyisobutylene-containing, diblock arms radiating from a siloxane core are described. The synthesis has been achieved by cationically polymerizing a monomer, such as styrene, and isobutylene to form diblock prearms and then hydrosilating the unsaturation-functionalized polyisobutylene with siloxanes carrying a plurality of Si—H groups via hydrosilation. The resultant star-block polymers may be thermoplastic elastomers characterized as having superior tensile strength and processing properties as compared to linear triblock polymers of similar hard/soft segments.

Abstract: An oligomer of the formula: [R3SiO1/2]m[O1/2Si(R2)O1/2]n[SiO3/2R]o[SiO4/2]p  (I) wherein each R is selected individually from the group consisting of R1, —OR2 and —OR3; each R1 is independently a substituted or unsubstituted hydrocarbon group; each R2 is a C1-C6 alkyl group or an acyl group; and each R3 is a independently an alkyl or alkenyl group having at least 8 carbon atoms; with the provisos that if R3 is alkenyl, there is no unsaturation within two carbon atoms adjacent to the oxygen atom of the —OR3 group; at least one R group is —OR3; at least one quarter of all R groups are —OR2 or —OR3; m=2 to 20; n=0 to 50; o=0 to 20; and p=0 to 10. The oligomer is a useful component of in insulation formulations for wire and cable used in underground locations.

Abstract: A polysiloxane-polybutylene copolymer having polybutylene chains grafted onto a polysiloxane backbone which has a variety of properties which render it valuable for applications in personal care.

Abstract: Crosslinked rubber particles comprising an isobutylene polymer component, an organosiloxane polymer component and optionally a vinyl polymer component, or graft copolymer particles comprising the crosslinked rubber particles and a vinyl polymer grafted onto the crosslinked rubber particles, which are useful particularly for improving the low temperature impact resistance of thermoplastic resins without impairing weatherability and heat stability thereof.

Abstract: Solid blends of rubbery polymers and amorphous or crystalline polymers, said blends being free-flowing at temperatures lower than the glass transition temperature or crystalline melting temperature of the amorphous or crystalline polymer, are prepared by intimate mixing procedures. In general, said mixing conditions include high shear conditions sufficient to convert polymer A to dispersed particles coated with polymer B and produce a free-flowing blend.

Abstract: A composition is comprised of the following: a) a hydrolyzed or partially hydrolyzed alkoxysilane; b) a solvent consisting of an organic liquid or mixture of two or more organic liquids in which component (a) and component (c) are soluble and c) a cross linking prepolymer, oligomer, resin or mixtures thereof that forms a low dielectric constant crosslinked polymer. Preferred crosslinked polymers are of a arylcyclobutene or polyphenylene prepolymer, oligomer, resin or mixtures thereof. A coating may be made using the composition wherein the coating is comprised of a crosslinked polymer of a low dielectric crosslinking prepolymer, oligomer, resin or mixture thereof and a hydrolyzed or partially hydrolyzed alkoxysilane, said coating being adhered to a surface of a substrate wherein said surface is comprised of a first material that is a metal, ceramic or polymer and a second material that is (i) a metal, ceramic, or polymer and (ii) different than the first material.

Abstract: A process for the attachment of aromatic or heteroaromatic rings to a polymeric support via a silyl ether linkage is described. Such process involves the synthesis of a chlorodialkyl aryl or heteroarylsilane which is then coupled to a polymeric support via a hydroxyl functionality to form a polymer-bound silyl ether. Further modification provides a polymer-bound small organic molecule that is cleaved from the polymeric support under mild conditions to give an aryl or heteroaryl silanol or a compound in which the aryl or heteroaryl carbon-silicon bond is replaced with a carbon-hydrogen, carbon-halogen, carbon-hydroxyl, carbon-sulfur, or carbon—carbon bond. Such methods are useful for the preparation of a library of diverse aromatic and heteroaromatic compounds by both manual and automated synthesis.

Abstract: The present invention relates to a high temperature resistant coating composition and a method of using thereof. More particularly, the invention relates to a coating composition comprising a resin containing functional hydroxyl groups (A), a polyfunctional epoxy resin (B), and an anhydride compound.(C).

Abstract: A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a polysiloxane having the following alkoxysilyl group (I) and/or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000: ≡Si—OR1  (I) ≡Si—OCOR2  (II) wherein, R1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms.

Abstract: A method is disclosed for making a heat dissipation arrangement for a circuit board on which are mounted bare silicon chips having an exposed face. A heat spreader has a planar portion, on whose inner face (facing the circuit board) are applied one or more pads of a gel composition. The pad(s) are positioned opposite the bare silicon chips when the heat spreader is attached to the circuit board and completely cover the exposed faces of the chips. The gel composition has a cohesive strength greater than its adhesive strength, has a compression modulus of less than 1.38 MPa, and has a thermal conductivity greater than 1.0 W/m-.degree. C., and a thickness of between about 0.08 mm and about 1.0 mm. The low compression modulus of the gel material protects the chips from the transmission of mechanical stresses thereto.

Abstract: This invention is a silicone oil gel composition which is comprised of a silicone block copolymer selected from the group consisting of polyethylene-polydimethylsiloxane block copolymers and polyethylene-polydimethylsiloxane-polydiphenylsiloxane block copolymers wherein the overall number average molecular weight ranges from 1000 to 21,000, preferably 1000 to 6000. The polyethylene blocks have a number average molecular weight of 400 to 3000, preferably 400 to 1500, the polydimethylsiloxane blocks have a number average molecular weight of 600 to 20,000, preferably 600 to 10,000, and the polydiphenylsiloxane blocks have a number average molecular weight of 200 to 2000, preferably 600 to 1200, wherein the block copolymer is dissolved in a silicone oil which is a polydimethylsiloxane polymer having a number average molecular weight of from 1000 to 1,000,000, preferably 4000 to 30,000.

Abstract: A curable composition, comprising a siloxane grafted vinyl polymer as its main component, reacts with an organic silicon compound having silicon-bonded hydrogen atoms in the presence of a hydrosilylation catalyst to form a peelable cured coating film. The siloxane grafted vinyl polymer has two unique grafted siloxane chains represented by the following general formulae (A) and (B): ##STR1## where R.sup.1 is a divalent organic group, R.sup.2 is a monovalent hydrocarbon group which is free of aliphatic bonds, R.sup.3 is a monovalent hydrocarbon group, Y is a monovalent organic group having unsaturated aliphatic bonds, a is 0 or 1, m is an integer between 0 and 20, n is an integer which is I or greater, and p is an integer of 1, 2 or 3.

Abstract: There is disclosed a method for preparing a thermoplastic elastomer, said method comprising:(I) first mixing(A) a thermoplastic resin selected from polyolefins, polyamides, thermoplastic polyurethanes or styrenic block copolymers,(B) at least one silanol-terminated diorganopolysiloxane having a viscosity of at least 10 Pa-s at 25.degree. C.,(C) optionally, up to 300 parts by weight of a filler for each 100 parts by weight of said diorganopolysiloxane, said filler being selected from the group consisting of(i) a reinforcing filler for said diorganopolysiloxane and(ii) a silicone resin,(D) an organohydrido silicon compound which contains an average of at least 2 silicon-bonded hydrogen groups in its molecule and(E) a condensation catalyst, components (D) and (E) being present in an amount sufficient to cure said diorganopolysiloxane; and(II) dynamically curing said diorganopolysiloxane (B).

Abstract: A modified styrene-based resin composition in which silicone powder is added to styrene-based resin.One can obtain styrene-based resin compositions remarkably improved in impact resistance and sliding properties, particularly in permanence during sliding. In particular, when the base material is transparent polystyrene-based resin, it was found that the present invention can provide styrene-based resin compositions having excellent impact strength, sliding properties, and transparency without spoiling their fluidity and thermostability. In addition, use of rubber modified polystyrene as styrene-based resin permits styrene-based resin compositions exhibiting well-balanced impact resistance, sliding properties, heat distortion resistance, molding properties, workability, and surface appearance of molded articles.

Abstract: An improved process for the preparation of thermoplastic elastomers by hydrosilylation crosslinking, in which a hydrosilylation crosslinking agent with a low degree of polymerization and/or a hydrosilylation crosslinking agent diluted in oil is used.

Abstract: A modified solid support for use in solid phase synthesis which comprises:a solid support having a linker group extending therefrom having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are each independently selected from the group consisting of alkyl, cycloalkyl, aryl, alkoxy, aryloxy, fluorine, chlorine, iodine and bromine.

Abstract: Previously cross-linked silicone elastomer particles with an organic-polymer shell are used as constituents for formulating aqueous coating compositions based on water-soluble or water-dilutable binders. The silicone elastomer particles contain: (a) 5 to 95% by weight, with respect to the total weight of the copolymer, of a nuclear polymer of general formula (R.sub.2 SiO.sub.2/2).sub.x (RSiO.sub.3/2).sub.y (SiO.sub.4/2).sub.z, in which x=5 to 99.5% by mole, y=0.5 to 95% by mole, z=0 to 30% by mole, and (b) 5 to 95% by weight, with respect to the total weight of the copolymer of a shell made of an organopolymer from mono- or poly-ethylenically unsaturated monomers; and R stands for the same or different monovalent alkyl or alkenyl radicals with 1 to 6 carbon atoms, aryl radicals or substituted hydrocarbon radicals.

Abstract: An improved process for the preparation of thermoplastic elastomers by hydrosilylation crosslinking of a butyl rubber component, in which a platinum containing hydrosilylation catalyst is used. The butyl rubber component includes a copolymer of at least isobutylene and an aromatic divinyl compound such as divinylbenzene. The copolymer of at least isobutylene and divinylbenzene is significantly easier to crosslink into a substantially insoluble rubber in a thermoplastic vulcanizate than isobutylene copolymers with only unsaturated repeating units from conjugated dienes. A crosslinked rubber component is obtained in the thermoplastic elastomer composition.

Abstract: A polysiloxane having a siloxane structure of the following formulas (1) and (2): ##STR1## wherein, R.sup.1 is a C.sub.1 to C.sub.6 alkyl group or C.sub.1 to C.sub.21 acyl group, a is 1 to 200, b is 1 to 200, t is 2 or 3 and r is 1 to 100, and a rubber composition containing the same.

Abstract: The present invention is a freeze-dried polystyrene-polysiloxane foam having a density of 0.05 to 0.8 grams per cubic centimeter and a void volume of 20 to 99 percent. These foams exhibit good compressibility and rebound and are useful in insulation and sound-deadening applications.

Abstract: A branched polyolefin additive for use in fuel and/or lubricating oil in the form of a comb, star, nanogel and structural combinations thereof in which a plurity of polyolefin arms are attached to a backbone having repeating units containing aliphatic groups, aromatic groups, heteroatom-containing groups and combinations thereof, to provide a branched polymeric additive in which the properties of the additive can be conveniently tailored to a single or multi-functional performance criteria of a fuel and/or lubricating oil composition.

Abstract: A process for producing organic polymers having silicon containing groups in high yields comprises hydrosilylating a polymer having unsaturated groups with a hydrosilicon compound. This process includes keeping the polymer and a solvent in an inert gas environment and introducing oxygen into the reactor just before starting the hydrosilylation reaction.

Abstract: The hydrosilylation of terminal double bonds in polypropylene (PP) or other polymers is effected in the melt phase. The double bonds were created by peroxide initiated degradation of PP in an extruder or a batch mixer. A hydride terminated polydimethylsiloxane is employed as a model substance to investigate the feasibility of hydrosilylating the terminal double bonds of the degraded polypropylene. The reaction may be carried out in three different reactors, namely a hot press, a batch mixer and a screw extruder. Two different reaction mechanisms may be used to effect the hydrosilylation reaction, namely a radical chain addition mechanism and a platinum catalysed mechanism with a colloid forming catalyst, platinum divinyltetramethyldisiloxane (Karstedt's catalyst). Catalytic amounts of a peroxide initiator are able to initiate the addition of silanes to the double bonds of the degraded polypropylene. Both reactions, namely degradation and hydrosilylation, may be performed simultanously.

Abstract: Radio frequency-transmissive compositions having reduced dissipation factors, microelectronic devices, and in particular, wireless radio frequency communication devices which utilize such compositions, and methods of forming the same are described. In one implementation, a liquid resin is provided and a solid organic polymer filler material is provided within the resin to impart a degree of radio frequency transmissivity which is greater than that of the resin alone, i.e. the composition has a reduced dissipation factor. An exemplary resin comprises epoxy and an exemplary filler material is a polytetrafluoroethylene powder. In another implementation, such composition is formed or applied over a substrate which includes an antenna formed thereon and cured to provide a solid coating. The substrate can also have integrated circuitry and a battery mounted thereon to provide a wireless communication device. In such a case, the composition can be formed over and cured atop the integrated circuitry and the battery.

Abstract: The invention relates to a composition, to a process for its preparation and to a method of coating shaped articles or elastomeric materials, where the composition can be prepared using(1) polymer components selected from the group consisting of(A1) polyorganosiloxanes comprising units (T units) of the formula (R.sub.1 Si--O.sub.3/2) and optionally, units (M units) of the formula (R.sub.3 Si--O.sub.1/2)(A2) polyorganosiloxanes comprising units (Q units) of the formula (Si--O.sub.4/2) and, optionally, units (M units) of the formula (R.sub.3 Si--O.sub.1/2)in whichR is identical or different and represents unhalogenated or halogenated hydrocarbon radicals having 1 to 18 carbon atom(s) per radical or OR.sup.1, whereR.sup.1 is identical or different and represents hydrogen or a monovalent, unsubstituted or substituted hydrocarbon radical having 1 to 8 carbon atom(s),with the proviso that there are from 0.01% to 3.0% by weight, preferably from 0.01% to 1% by weight, of Si-bonded radicals OR.sup.

Abstract: Disclosed is a curable resin which comprises at least one polymer selected from polymers each independently having a polymer chain represented by the following formula (I): ##STR1## wherein A to F are monomer units constituting a main chain of the polymer and are arranged in any order, and a to f are, respectively, wt % of A to F, based on the total weight of A to F; wherein each A is independently selected from cyclic olefin monomer units having no reactive group, each B is independently selected cyclic conjugated diene monomer units having no reactive group, each C to F is independently selected from comonomer units having no reactive group, and copolymerizable with A and B, wherein Q.sub.1 to Q.sub.6 are reactive groups, and wherein the average total number (J) of Q.sub.1 to Q.sub.6 of the at least one polymer satisfies: 1.ltoreq.(J).ltoreq.4, the polymer having an ME of from 1,000 to 5,000,000. A resin composition containing the curable resin is also disclosed.

Abstract: A highly branched polymer in the form of a comb, star, nanogel and structural combinations thereof in which a plurality of polyolefin arms formed of polymers of 1-alkenes are attached to a backbone having repeating units containing aliphatic groups, aromatic groups, heteroatom-containing groups and combinations thereof.

Abstract: The present invention therefore relates to a composition comprising:(A) 100 parts by weight of a thermoplastic resin (A); and(B) at least 0.5 part by weight of a siloxane blend (B) consisting essentially of 50-99% by weight of the siloxane blend of a high molecular weight siloxane having a viscosity of greater than 60 Pa.s and 1-50% by weight of the siloxane blend of a low molecular weight siloxane having a viscosity of 10 to 330 Pa.s, wherein said high molecular weight siloxane has a viscosity greater than the viscosity of said low molecular weight siloxane.These compositions exhibit surprisingly improved properties, such as having reduced coefficient of friction, consistent coefficient of friction over time, increased hydrophobicity and improved abrasion resistance.

Abstract: The presence in curable polyolefin compositions of a moisture curable organosilicon compound containing at least one alkenyloxy group bonded to the silicon atoms improves the adhesion to a variety of substrates that is developed during the curing reaction of polyolefin compositions cured by a hydrosilation reaction. The organosilicon compound is preferably a reaction product of ingredients comprising 1) a silane or bis-silylalkane containing at least three silicon-bonded moisture-reactive groups per molecule and 2) an organic compound containing at least one carbinol group and at least one ethylenically unsaturated group.

Abstract: Foamed polymeric materials exhibiting improved heat resistant properties and improved mechanical properties, as compared with known foamed styrene polymer materials, are obtained by expanding a polymer blend including a syndiotactic styrene polymer and an amount of an amorphous polymeric material which will impart enhanced heat resistant properties to the blend.

Abstract: Curable, silane-grafted substantially linear ethylene polymers are described which are useful as wire and cable coatings, weatherstripping, fibers and the like. These silane-grafted polymers can be either filled or unfilled and cure quickly relative to many commercial coatings.

Abstract: A composition comprises (A) a syndiotactic styrene-based resin and (C) rubber polymer particles such as graft copolymers, butadiene or isoprene block copolymers optionally hydrogenated and/or modified with maleic anhydride, and other rubbers, and, optionally, (B) a thermoplastic resin such as a polycarbonate, and/or (D) a filler such as glass fibers.

Abstract: The present invention provides adhesion promoters for curable polyolefin compositions wherein said adhesion promoters are selected from a specified group of hydrocarbyloxy-substituted organosilicon compounds and condensation products of these compounds. At least one hydrocarbyloxy group on each silicon atom of the adhesion promoter is derived from a polyhydric alcohol containing at least two hydroxyl groups per molecule and substantially no ethylenic unsaturation.

Abstract: A coating powder for producing a high temperature resistant coating has a resin system which comprises (A) between about 50 and about 93 wt % based on total of (A) plus (B) of a silicone resin and (B) between about 7 and about 50 wt % based on total weight of (A) plus (B) of a polyhydroxyl component. The silicone resin (A) of the coating powder has organic substitutents selected from the group consisting of phenyl, methyl, C.sub.2 through C.sub.6 alkyl and mixtures thereof. The silicone resin has a viscosity of between about 500 and about 10,000 cps at 150.degree. C., a condensable hydroxyl content of between about 2 and about 4.5 wt %, and a glass transition temperature (T.sub.g) of about 55.degree. C. or above. The silicone resin preferably contains about 0.2% or less of organic solvents.

Abstract: It is an object of the invention to improve the adhesive property of a curable composition mainly comprising a reactive silyl group-containing saturated hydrocarbon polymer when applied to various adherends and to improve the weathering-resistant adhesive property of said composition when applied to various glass products, in particular heat ray-reflecting glass products.The present invention relates to a curable composition which comprises (A) a saturated hydrocarbon polymer containing at least one silicon-containing group having a hydroxyl group or hydrolyzable group bound to the silicon atom and capable of crosslinking by forming a siloxane bond, (B) a silane coupling agent and (C) a compound containing, within the molecule thereof, an unsaturated group capable of polymerizing upon reaction with atmospheric oxygen and/or a photopolymerizing substance.

Abstract: Terminally functionalized silicone copolymers prepared using protected functionalized initiators and processes for preparing the same. The silicone copolymers includes protected, functionalized silicone diene and/or alkenylsubstituted aromatic copolymers, such as mono-functional, homotelechelic, heterotelechelic, macromonomer, and radial copolymers. The protected functionalized copolymers can be optionally deprotected to afford functionalized silicone diene and/or alkenylsubstituted aromatic copolymers.

Abstract: The present invention relates to a method for processing a thermoplastic resin composition by extruding the composition through a nickel die to provide an extrudate having a low degree of surface roughness, said composition comprising(A) 100 parts by weight of a thermoplastic resin;(B) 0.01 to 1 part by weight of a hydroxy-functional diorganopolysiloxane having a number average molecular weight of at least 10,000; and(C) 0.001 to 1 part by weight of an organophosphorous compound.

Abstract: Various polymeric compositions, including bicomponent networks and multiblock copolymers, containing polyisobutylene are synthesized by linking a plurality of polyisobutylene polymer chains with siloxane compounds having at least two SiH moieties. Specifically, bicomponent networks are synthesized by linking multifunctional polyisobutylenes, preferably tri-telechelic allyl-terminated polyisobutylenes, with multifunctional linear polysiloxanes, such as di-telechelic linear SiH-terminated polydimethylsiloxane, by hydrosilation. Similarly, multiblock copolymers are synthesized by endlinking difunctional allyl-terminated polyisobutylenes with difunctional SiH-terminated linear polysiloxanes, such as polydimethylsiloxanes, by hydrosilation.

Abstract: A propylene-ethylene copolymer composition is obtained which has good moldability and an excellent balance of rigidity, toughness, and impact-strength. The composition has a melt flow rate of 10 to 300 g/10 minutes and is obtained by producing 60 to 95% by weight, based on the weight of whole polymer, of a propylene polymer having a melt flow rate (ASTM D1238) in the range of 100 to 1,000 g/10 minutes and having a ratio (Cf) of integrated values of the propylene polymer dissolved in o-dichlorobenzene at a temperature of lower than 112.degree. C., and a temperature of 112.degree. C. or higher, respectively, of 0.5 or less, by carrying out polymerization of propylene in the presence of a highly stereoregular catalyst and hydrogen in a polymerization step (I), and then producing 5 to 40% by weight, based on the weight of whole polymer, of an ethylene-propylene copolymer by feeding ethylene and propylene to the propylene polymer to react so that the content of ethylene becomes 30 to 80% by weight.

Abstract: A flame retardant resin composition comprises a silicone resin having specific structure and weight-average molecular weight and a non-silicone resin having aromatic-ring. The silicone resin has R.sub.2 SiO.sub.1.0 units and RSiO.sub.1.5 units. The weight-average molecular weight of the silicone resin is in the range of not less than 10,000 to not more than 270,000. R is hydrocarbon group.

Abstract: A nonaqueous sizing for glass fibers useful for reinforcement of polymers. The sizing composition comprises one or more film formers miscible with the polymer to be reinforced and one or more coupling agents. The sizing composition of the invention provides a glass fiber which may be wirecoated with the polymer to be reinforced, eliminating the need for extrusion or pultrusion processing to make glass/polymer composite fibers, compound or pellets.

Abstract: The invention relates to the use of precrosslinked silicone elastomer particles with an organopolymer shell as the formulation constituent in powder coating material compositions based on thermoplastic or thermosetting binding agents, the silicone elastomer particles containing (a) 5 to 95% by weight, in relation the total weight of the copolymerisate, of a nucleus polymer of the general formula (R.sub.w SiO.sub.2/2).sub.x.(RSiO.sub.3/2).sub.y.(SiO.sub.4/2).sub.z with x=5 to 99.5 mol %, y=0.5 to 95 mol %, z=0 to 30 mol %, and (b) 5 to 95% by weight, in relation to the total weight of the copolymer, of a shell made of an organopolymer of ethylenically mono or multi-unsaturated monomers, R standing for identical or different monovalent C.sub.1 -C.sub.6 alkyl or alkenyl residues or substituted hydrocarbon residues.

Abstract: The subject invention provides a thermoset elastomer comprising a crosslinked pseudorandom or substantially random interpolymer of: (a) from 15 to 70 weight percent of at least one .alpha.-olefin, (b) from 30 to 70 weight percent of at least one vinylidene aromatic compound, and (c) from 0 to 15 weight percent of at least one diene. The subject invention further provides a thermoplastic vulcanizate comprising the thermoset elastomers of the invention as provided in a thermoplastic polyolefin matrix. The subject invention further provides processes for preparing the inventive thermoset elastomers and thermoplastic vulcanizates, as well as parts fabricated therefrom. The inventive materials have a superior balance of properties, as compared to EPM and EPDM based materials. The subject invention also pertains to foams and methods for their preparation.

Abstract: A silicone release composition having a non-gloss, i.e., matte finished, surface and a linerless label incorporating the silicone release composition. The release composition includes a crosslinked silicone-based polymer having microparticles of a polymeric wax at least partially embedded therein. The polymeric wax may be polytetrafluoroethylene, polypropylene or other polyolefin, or a hydrocarbon-based wax. The microparticles of polymeric wax cause incidental light to scatter upon reflection, giving the release composition surface matte appearance. This makes the release composition particularly useful for linerless labels on which bar coded information will be printed. Also, a method for producing linerless label stock. The method includes mixing an uncured silicone material with microparticles of a polymeric wax. The mixture is coated onto a substrate and exposed to UV radiation to cure or crosslink the silicone around the microparticles of wax.

Abstract: An acyclic alkane soluble anionic polymerization initiator includes a mixture of from about 90 to about 10 parts by weight of a lithio amine having the general formula A.sub.1 Li and from about 10 to about 90 parts by weight of at least one other lithio amine having the general formula A.sub.2 Li. A.sub.1 and A.sub.2 are selected from the dialkyl, alkyl, cycloalkyl and dicycloalkyl amine radicals and cyclic amine radicals. There is also provided a method of forming a mixture of anionic polymerization initiators, a functionalized polymer and a method of forming a functionalized polymer.