Abstract: The compression set values of cured elastomers prepared from finely divided organosiloxane elastomer bases are reduced by treating the base with a silane or disilazane wherein the silicon atoms are bonded to one hydrolyzable group and three hydrocarbon radicals that are free of ethylenic unsaturation. The base is maintained in a fluidized state during this treatment.

Abstract: A modified polyurethane structionally incorporating silica into a polyurethane polymer. The silica is first fluidized with a polyol and then reacted with a linking component having an organo reactive group that is reactive with an isocyanate. Polyisocyanate and additional polyol are added to the reaction mixture such that the isocyanate reacts with the linking component and the polyol to form a polymer wherein the silica is an integral unit in the polymer. The resultant modified polyurethane has good dynamic properties and is surprisingly resilient.

Abstract: The invention relates to a tire with a tread which is reinforced with silica where the tread rubbers are of a blend of emulsion SBR with medium to high styrene content, isoprene/butadiene copolymer rubber, cis 1,4-polybutadiene rubber and natural rubber.

Abstract: A method for producing colored and exactly spherical fine-grains of polymer by carrying out the suspension and polymerization of ethylenic unsaturated monomers containing a pigment in water under the presence of a suspension stabilizer, wherein an inorganic pigment treated with silane-coupling agent is used as said pigment. According to the present invention, the pigments are homogeneously dispersed in said exactly spherical fine-grains of polymer and a loss of color is prevented.

Abstract: Novel contrast media for use in ultrasonic imaging are described. Such contrast media may be comprised of an aqueous solution of one or more biocompatible polymers, wherein said biocompatible polymers are coated with and/or in admixture with at least one silicon containing compound. Alternatively, the contrast media may be comprised of an aqueous solution of one or more biocompatible synthetic polymers, or an aqueous solution of cellulose. The contrast media may be employed, if desired, with anti-gas agents and/or suspending agents.

Abstract: As a tread rubber of a pneumatic tire is used a rubber composition comprising 10-150 parts by weight of a silica filler, 0-150 parts by weight of carbon black and 0.2-10 parts by weight of at least one specified silane coupling agent, based on 100 parts by weight of a particular polymer rubber having a glass transition temperature of not lower than -50.degree. C. through polymerization of 1,3-butadiene or copolymerization of 1,3-butadiene and styrene with an organic alkali metal initiator, or a rubber blend of not less than 30 parts by weight of the above polymer and not more than 70 parts by weight of the other diene series rubber.

Abstract: The present invention relates to a method for the continuous preparation of heat-vulcanizing silicone rubber compounds. The method comprises continuous feeding of (A) 100 weight parts polydiorganosiloxane gum, (B) 5 to 100 weight parts reinforcing filler, and (C) up to 30 weight parts processing aid to a co-rotating twin-screw continuous compounding extruder. The components (A), (B), and (C) are continuously mixed in the extruder at a temperature in a range of about 200.degree. C. to 300.degree. C. The mixed components are then discharged, forming an extrudate. The extrudate is fed continuously to a counter-rotating twin-screw continuous compounding extruder, wherein the extrudate is continuously heat-treated at a temperature in a range of 150.degree. C. to 300.degree. C., forming the silicone rubber compound, which is then discharged from the counter-rotating twin-screw continuous compounding extruder.

Abstract: A process for forming a cured article of consistent shape from a hydrolyzable siloxane composition without the problem of non-uniformity that results from significant die swell upon extrusion and from shrinkage upon curing. The present process comprises extruding a non-self-supporting composition maintained at a temperature greater than 5.degree. C. The composition comprises a polydiorganosiloxane having at least two silicon-bonded hydrolyzable groups per molecule, a hydrolyzable silicon crosslinker, a filler, and optionally a curing catalyst. The composition is extruded at a constant rate through a shaping die to form a shaped extrusion having a cross-sectional area that is substantially uniform throughout the length of the shaped extrusion. The shaped extrusion is fed in a continuous flow into an aqueous curing bath which is maintained at a temperature of at least 20.degree. C. and which has a density substantially the same as or slightly greater than the density of the shaped extrusion.

Abstract: A process for the production of plastic and rubber compositions filled with carbon black in which an organosilicon compound is used and is reacted in situ with the carbon black. The organosilicon compound is selected from the following formulae:(R.sup.1.sub.n --(RO).sub.3-n Si-(Alk).sub.m --(Ar).sub.p).sub.q (B)(I)R.sup.1.sub.n --(RO).sub.3-n Si-(Alkyl) (II)orR.sup.1.sub.n --(RO).sub.3-n Si-(Alkenyl) (III)in whichB=--SCN, --SH, --Cl--NH.sub.2 (where q=1) or --S.sub.x -- (where q=2),R=a C.sub.1-4 alkyl or C.sub.1-4 alkoxy group or a phenyl group,R.sup.1 =a C.sub.1-4 alkyl group or a phenyl group,n=0, 1 or 2,Alk=a difunctional, linear or branched C.sub.1-6 hydrocarbon radical,m=0 or 1,Ar=a C.sub.6-12 preferably C.sub.6 arylene radical,p=0 or 1, with the proviso that p and n cannot both be 0,x=a number from 2 to 8,Alkyl=a monofunctional, linear or branched unsaturated C.sub.1-20 and preferably C.sub.2-8 hydrocarbon radical,Alkenyl=a monofunctional, linear or branched unsaturated C.sub.2-20 and preferably C.sub.

Abstract: A sliding member comprising a fluorine resin and carbon fibers treated with a fluorine-containing silane modifying agent represented by the formula R.sup.1 -SiX.sub.3 wherein R.sup.1 represents an alkyl group having from 1 to 10 carbon atoms, a part or the whole of the hydrogen atoms of which are replaced with fluorine atoms and X represents a hydrolyzable group or a chlorine atom.

Abstract: Silicone mold compositions are provided which exhibit low durometer and high tear strength properties and comprise a main filler of precipitated silica and a reinforcing co-filler selected from acicular CaSiO.sub.3 fillers, fumed aluminum oxide fillers, and spherical ceramic fillers. The co-fillers have large surface areas and small particle sizes. The co-fillers are used with alkoxy silane cross-linking agents of the formula (RO).sub.4 Si, particularly n-propylsilicate. Two-part silicone cure systems are provided which enable the rapid achievement of full die B tear strengths without the need for prolonged aging of these materials.

Abstract: Resin compositions comprising (A) polyethylene ether resins, (B) polyamide resins, (C) elastomeric substances, and (D) needle-shaped titanium oxide are disclosed. The disclosed resins exhibit an excellent balance of stiffness and impact resistance, low linear coefficient of expansion, and good heat resistance, oil resistance, forming processability and molding surface appearance.

Abstract: An organic phosphite composition is provided comprising organic phosphite particles having organic phosphite cores coated with an aminofunctional organic polysiloxane. Blends of the phosphite and the aminofunctional organic polysiloxane are also provided. The phosphite particles exhibit high levels of resistance to hydrolysis and are useful as antioxidant additives for thermoplastic compositions.

Abstract: The composition of the present invention comprises a oil-resistant silicone rubber composition that undergoes little swelling even when used in regular or continuous contact with mineral oil-based lubricating oil such as engine oil and so forth. The oil-resistant silicone rubber composition comprises:(A) a dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum that contains 0.001 to 5 mole percent methylvinylsiloxane unit,(B) a hydrocarbon oil or diorganopolysiloxane oil wherein the total in each diorganopolysiloxane oil molecule of the number of silicon-bonded hydrogen atoms and the number of functional groups reactive with component (A) or (C) is less than two,(C) a reinforcing filler, and(D) a curing agent in a quantity sufficient to cure the composition.

Abstract: A rubber composition in which highly hard particles formed with a rubber-philic coating layer by a fluidized coating treatment are dispersed in a rubber material.

Abstract: Compositions suitable for producing mineral fibre reinforced thermoplastic composite materials by the wet-laid process comprise mineral fibres, matrix polymer and a coupling agent. The fibres are silanized with reactive silane groups capable of reacting with the coupling agent, for example a maleic anhydride grafted polyolefin, to improve adhesion between the fibres and matrix polymer in the final composite product. The composition excludes components which hinder the reaction between the silane groups and the coupling agent.

Abstract: An adhesive composition comprising an alpha-cyanoacrylate and a hydrophobic silica surface-treated with dimethyldichlorosilane, the composition being characterized in that the composition has incorporated therein at least one of a polyether-modified silicone or alcohol-modified silicone in an amount of 0.05 to 5.0% based on the weight of the composition.

Abstract: A method of increasing the hydrophobicity of solid materials. The inventive method comprises the steps of: (a) metal ion activating the surface of a solid substrate material to provide reactive metal sites on the surface and (b) chemically bonding a surfactant to the surface at the reactive metal sites. Titanium dioxide pigments and other particulate property modifiers treated in accordance with the inventive method are more readily dispersed in polymer compositions.

Abstract: A water-in-oil type emulsified solid composition containing (a) an oil component such as a silicone oil, (b) a solid wax and/or an oil-gelling agent, (c) water, and (d) (i) a polyoxyalkylene modified organopolysiloxane or (ii) a lipophilic surfactant and a hydrophobically treated powder, wherein the water content is 5% by weight or more, based upon the total amount of the composition.

Abstract: The invention provides a silicone rubber composition which is efficiently curable by exposure to microwaves but, different from conventional microwave-curable silicone rubber compositions compounded with a deep-colored energy-absorbing agent, is still capable of being colored in any desired color because the energy-absorbing agent compounded therein is not colored. The energy-absorbing agent used here is a silica or polyorganosilsesquioxane powder having cyanoalkyl or fluoroalkyl groups bonded to the silicon atoms.

Abstract: A melt-extrudable thermoplastic composition is provided which includes a thermoplastic polyolefin and an additive system made up of a first component and a second component, in which (A) the first component is a defined polysiloxane polyether having a molecular weight of from about 350 to about 18,000 and which is present in an amount of from about 0.1 to about 3 percent by weight, based on the amount of thermoplastic polyolefin; and (B) the second component is a hydrophobic fumed silica, in which the weight ratio of the first component to the second component is in the range of from about 20 to about 300. Such composition yields, upon melt-extrusion, either nonwoven webs having significantly increased tensile strengths when compared to nonwoven webs prepared from the thermoplastic polyolefin alone, or wettable webs requiring an amount of first component which is significantly less than that required in the absence of the second component.

Abstract: A fiber-reinforced molding composition, comprising:a) 97 to 50% by weight, relative to the sum of (a) and (b), of a mixture of 30 to 100 parts by weight of a polyphenylene ether, 0 to 70 parts by weight of a styrene polymer, 0 to 10 parts by weight of a polyoctenylene and 0.1 to 2.5 parts by weight of an .alpha.,.beta.-unsaturated carboxylic acid derivative or a precursor thereof;b) 3 to 50% by weight of carbon fibers and/or glass fibers whose surfaces bear functional groups which are capable of entering into chemical coupling reactions with the .alpha.,.beta.-unsaturated carboxylic acid derivatives; and optionallyc) dyes, pigments, plasticizers, flame retardant additives, processing auxiliaries, other customary additives or combinations thereof.

Abstract: A process for preparing a filler-containing PTFE granular powder, which comprises mixing uniformly a PTFE powder having an average particle size of not more than 100 .mu.m and a (semi-)hydrophilic filler which is surface-treated with an organosilane of the formula: ##STR1## in a two-phase liquid medium comprising water and a water-insoluble organic liquid having a surface tension of not more than 35 dynes/cm at 25.degree. C. Accordingly to the process, the separation of filler can be avoided, and a colorless molded article can be provided.

Abstract: The compatibility between high consistency fluorinated and non-fluorinated polydiorganosiloxanes is increased, with a resultant increase in the physical-properties of elastomers prepared from mixtures of these polymers, by blending the polymers together with a reinforcing silica filler that is reacted with both fluorinated and non-fluorinated liquid polydiorganosiloxanes as filler treating agents. The high consistency polydiorganosiloxanes contain at least two alkenyl radicals per molecule and are cured by a hydrosilation reaction.

Abstract: Continuous, woven and non-woven glass fibers are impregnated with certain silanes before use of the fibers to make reinforced thermoplastic composites using pultrusion or compression molding. Continuous, woven and non-woven glass fiber reinforced composites are also made by concurrently combining the fibers with certain silanes and a thermoplastic matrix material using pultrusion or compression molding.

Abstract: A room temperature vulcanizable organopolysiloxane composition comprises (A) a diorganopolysiloxane which is blocked with an alkoxy group at both ends of a molecular chain thereof, (B) a tri or tetraalkoxysilane, (C) a titanium curing catalyst, (D) a silica filler, and (E) an alkoxysilane which is less hydrolyzable than the alkoxysilane of (B). The composition yields a cured product having high strength and high elongation and is low in viscosity and extrusion rate. A method for preparing the composition is also provided in which the ingredients (A) to (D) are first mixed together, to which the ingredient (E) is added.

Abstract: Disclosed is a heat-resistant rubber composition comprising (A) 100 parts by weight of an ethylene/.alpha.-olefin copolymer or a modified ethylene/.alpha.-olefin copolymer formed by graft-copolymerization with at least one compound selected from the group consisting of unsaturated carboxylic acids and anhydrides and esters thereof, and (B) (i) 10 to 100 parts by weight of a silica type filler which has been treated with a silane compound represented by the following formula: ##STR1## wherein R.sup.1 stands for an alkenyl group, a chloroalkenyl group or a chloroalkyl group, and R.sup.2 stands for a lower alkyl group, or (ii) a combination of 10 to 100 parts by weight of said silane-treated silica type filler or an untreated silica type filler and 0.5 to 30 parts by weight of a polyorganosiloxane having an average composition represented by the following formula:(R.sup.3).sub.a (R.sup.4).sub.b SiO.sub.(4-a-b)/2 (II)wherein R.sup.3 stands for a monovalent saturated or unsaturated hydrocarbon group, R.sup.

Abstract: Compounds useful for improving the dispersibility of micaceous particulates in aqueous-based coating compositions comprise urethanes or ureas which are the reaction products of silylalkyl or silylaryl isocyanates with alcohols, amines, polyether alcohols or amine-terminated polyethers. The compounds may also be the reaction products of silylalkyl- or silylarylamines with half-blocked diisocyanates which are themselves the reaction products of a diisocyanate with an alcohol, amine, polyether alcohol or amine-terminated polyether.Micaceous particulates which have been surface modified by reaction with these compounds, as well as coating compositions comprising such surface-modified micaceous particulates, and coated substrates are also disclosed.

Abstract: Disclosed is a resin composition which comprises (a) 5 to 95% by weight of a styrene-based polymer having a syndiotactic configuration, (b) 95 to 9% by weight of a thermoplastic resin having at least one polar group selected from a carboxyl group, a hydroxyl group and an amino group at the terminal; and (c) 0.01 to 15 parts by weight of a styrene-based copolymer obtained by copolymerizing a styrene compound with a vinyl compound having an epoxy group or a styrene-based copolymer obtained by copolymerizing a styrene compound with an .alpha.,.beta.-unsaturated carboxylic acid anhydride based on 100 parts by weight of the aobve components (a) and (b). The composition exhibits no laminar peeling and has an excellent appearance because affinity and dispersibility of the styrene-based polymer and the thermoplastic resin are improved, and a polystyrene-based resin composition improved in mechanical strength can also be obtained without using a complicated process.

Abstract: A uniform mixture of a polytetrafluoroethylene molding powder and an organic filler, which can provide moldings having improved properties without lowering the appearance and mechanical property, is obtained without sticking the filler to the wall of a mixer by mixing the molding powder and the filler in the presence of a silane coupling agent and a polar solvent, or by previously treating the organic filler with the silane coupling agent and mixing the treated filler with the molding powder.

Abstract: A method of increasing the hydrophobicity of solid materials. The inventive method comprises the steps of: (a) metal ion activating the surface of a solid substrate material to provide reactive metal sites on the surface and (b) chemically bonding a surfactant to the surface at the reactive metal sites. Titanium dioxide pigments and other particulate property modifiers treated in accordance with the inventive method are more readily dispersed in polymer compositions.

Abstract: Disclosed is a novel polypropylene resin composition which is outstandingly free from surface tackiness and still has good transparency so as to be useful as a material of resin films used for wrapping. The resin composition comprises, as a uniform blend, (a) 100 parts by weight of a polypropylene resin, and (b) from 0.01 to 10 parts by weight of an inorganic oxide powder which is a product obtained by the deflagration of an inorganic oxidizable powder, e.g., an elementary silicon powder, in an oxidizing atmosphere such as air. By virtue of the unique method for the preparation of the silicon dioxide powder, the particles have high surface activity so that the surface properties of the resin composition or, in particular, resin films prepared therefrom can be greatly improved even with a relatively small amount of the inorganic oxide powder compounded as an anti-blocking agent not to badly affect the transparency.

Abstract: Compounds useful for improving the intra-film binding of micaceous particulates in films formed from coating compositions which contain such micaceous particulates comprise urethanes or ureas which are the reaction products of silylalkyl- or silylaryl isocyanates with blocked or unblocked alcohols, aminoalcohols, or polydiol alcohols. The compounds may also be the reaction products of silylalkyl- or silylarylamines with half-blocked diisocyanates which are themselves the reaction products of a diisocyanate with a blocked or unblocked alcohol, aminoalcohol, or polydiol alcohol.Micaceous particulates which have been surface modified by reaction with these compounds, as well as coating compositions comprising such surface-modified micaceous particulates, and coated substrates are also disclosed.

Abstract: A resin composition comprising a polyarylene sulfide resin and at least one metal hydroxide containing 50% by weight or more of magnesium hydroxide, wherein the metal hydroxide is subjected to a surface treatment with a fatty acid or a silane coupling agent prior to addition with the polyarylene sulfide resin; or the composition further comprises glass fibers and talc.

Abstract: A control cable including a conduit having flexibility, the inside surface of which is fitted with a liner, and an inner cable having an inner coat, which is inserted into the conduit so that the inner cable slides slidden in the conduit. The liner is made of a thermoplastic resin dispersively containing 13 to 20% by weight of organopolysiloxane which in turn is made of 45 to 85% by weight of an organopolysiloxane having an ultra-high viscosity of which kinematic viscosity is 1,000,000 to 50,000,000 cSt at 25.degree. C. and 55 to 15% by weight of an organopolysiloxane having a lower viscosity of which kinematic viscosity is 25 to 10,000 cSt at 25.degree. C. The inner coat is made of a thermoplastic resin. The control cable shows excellent load efficiency and can be smoothly operated for a long period of time.

Abstract: Polyamides reinforced with glass fibers and produced by means of the activated anionic polymerization of lactams. In order to improve the adhesion between plastic and glass fibers, the surface of the glass fiber is modified with organosilicon compounds.

Abstract: A surface-modified wholly aromatic polyamide fiber having an enhanced bonding property, surface tenacity and durability and a reduced friction, comprises a fiber matrix of a wholly aromatic polyamide material, fine particles of a cation-exchanging inorganic material distributed on and in a surface portion of the matrix and an additive comprising a cationic organic compound or a multi-functional organic silicone compounds, and attached to the fine organic particles.

Abstract: The present invention provides methods for treating reclaimed sand obtained from dismantled foundry molds and cores which contain a cured binder derived from an ester cured alkaline phenolic resin. Treatment of the reclaimed sand with a silane solution, particularly an aqueous solution, enhances the tensile strengths of foundry molds and cores produced therefrom beyond those obtained with untreated reclaimed sand. Methods for producing foundry cores and molds which incorporate such a treatment process are also provided by this invention as are raw batch formulations.

Abstract: Optically clear, reinforced cross-linked silicone elastomers of the invention contain 12 to 18 mol percent of aryl substituted siloxane units of the formula R.sub.4 R.sub.5 -SiO, end blockers containing silioxane units of the formula R.sub.1 R.sub.2 R.sub.3 -SiO..sub.5, and dialkyl siloxane units of the formula R.sub.6 R.sub.7 -SiO. R.sub.1 and R.sub.2 are alkyl, aryl or substituted alkyl or substituted aryl groups, and R.sub.3 is an alkenyl group. R.sub.4 and R.sub.5 are phenyl or mono lower alkyl substituted phenyl groups. R.sub.6 and R.sub.7 are methyl or ethyl groups. The polymer has a degree of polymerization between 100 to 2000, and preferably approximately 250. The polymer also contains trimethyl silyl treated silica as a reinforcer in the weight ratio of approximately 15 to 45 parts of reinforcer to 100 parts of the polymer. After cross-linking, the polymer has properties of an optical refractive index which is at least 1.

Abstract: A treatment for finely divided silica reinforcing fillers is provided which comprises heating the silica filler in the presence of a fluoroalkyl-functional diorganopolysiloxane. The treated fillers are especially compatible with fluorosilicone gums, and fluorosilicone rubbers made using said fillers exhibit improved mechanical properties, especially tear strength and compression set.

Abstract: The present invention relates to silicone elastomers based on platinum-catalyzed, hot-curing organopolysiloxane compositions which are characterized by particularly low compression set after crosslinking and to a process for the production of these elastomers.

Abstract: A thermoplastic resin containing a graft copolymer obtained by graft-copolymerizing at least one vinyl monomer onto colloidal silica-core silicone-shell particles, and a process for producing the thermoplastic resin.A colloidal silica-core silicone-shell particles comprising(A) from 99.9 to 5% by weight of cores which are colloidal silica particles, and(B) from 0.1 to 95% by weight of shells comprising an organosiloxy group represented by the formula ##STR1## wherein R.sup.1 which may be the same or different each represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, Q represents hydrogen atom or an alkyl group having 1 to 6 carbon atoms, p is an integer of 1 to 3, and q is an integer of 0 to 2, with proviso that (p+q) is an integer of 1 to 3, and/or a polyorganosiloxane represented by the average composition formula ##EQU1## wherein R.sup.

Abstract: A multipurpose additive system comprising(a) an alkali metal zeolite, an alkaline earth metal zeolite, zinc zeolite, or mixtures thereof;(b)(i) an aliphatic compound containing at least six carbon atoms substituted with one or more polar functional groups sufficient to provide a polar group frequency factor of at least about 0.01; or(ii) a polydimethylsiloxane compound containing from 4 to about 500 siloxane units, substituted with one or more polar functional groups sufficient to provide a polar group frequency factor of at least about 0.01; or(iii) mixtures thereof in any proportion; and(c) optionally, zinc oxide.

Abstract: Long fiber-reinforced normally solid polyamide resin compositions and molded articles formed thereof include a polyamide base resin, between 5 to 80% by weight of reinforcing fibers having a length of at least 3 mm, and between 0.01 to 3% by weight of a processing aid. The processing aid is a lithium salt of a fatty acid or a metal salt of a fatty acid having 22 to 32 carbon atoms. The compositions are preferably in the form of a generally cylindrical pellet having a length of 3 to 50 mm such that the reinforcing fibers are substantially as long as the pellet in which they are incorporated, and are oriented parallel to one another along the longitudinal axis of the pellet.

Abstract: An organosilicone-treated silica obtained by treating(A) a silica powder having a specific surface area of at least 50 m.sup.2 /g with(B) a triorgano(1-alkoxyvinyloxy)silane having the formula (I): ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group or an ether linkage-containing organic group, and R.sup.2 are each a substituted or unsubstituted monovalent hydrocarbon group or an ether linkage-containing organic group. The invention also discloses an organopolysiloxane composition containing the organosilicone-treated silica and a process preparing the composition. The organosilicone-treated silica is of high quality, containing no substance with disagreeable smell or corrosiveness which has been by-produced heretofore. Hence, the composition containing the silica is free from pseudocrosslinking such as structuring or crepe hardening.

Abstract: A surface modified filler comprises sodium aluminocarbonate particles having a surface coating comprising an organofunctional silane or an organofunctional titanate. The surface modified filler is useful as a fire retardant material in thermoplastic and thermoset compositions.

Abstract: Provided is a dental restorative material having high mechanical strength, abrasion resistance, hardness and excellent aesthetic appearance because it contains a large amount of an ultrafine filler having a particle size of 0.1 .mu.m or less, and can hence be used for restoring molars as well as foreteeth. The dental restorative material comprises an inorganic filler with a size of 0.1 .mu.m or less which is insoluble in water and surface-treated with a silane coupling agent represented by the following general formula: ##STR1## and a (meth)acrylate monomer composition containing at least 50% by weight based on the weight of the composition of at least one hydrophobic multifunctional (meth)acrylate represented by the following general formula: ##STR2## said surface-treated inorganic filler being incorporated in an amount of at least 100 parts by weight based on 100 parts by weight of said monomer composition.

Abstract: The present invention provides methods for treating reclaimed sand obtained from dismantled foundry molds and cores which contain a cured binder derived from an ester cured alkaline phenolic resin. Treatment of the reclaimed sand with a silane solution, particularly an aqueous solution, enhances the tensile strengths of foundry molds and cores produced therefrom beyond those obtained with untreated reclaimed sand. Methods for producing foundry cores and molds which incorporate such a treatment process are also provided by this invention as are raw batch formulations.

Abstract: Disclosed is a self-lubricating composite material prepared from polymers, used for the fabrication of bearing members. The composite material is characterized by the fillers or solid lubricants contained therein which have been treated with titanates or silane compounds and by the liquid lubricant contained therein which include polar compounds. Bearing members made by this self-lubricating composite material have a lower friction coefficient than commercial self-lubricating bearing members, can use thermoset plastics as a matrix and can be made into colored products.

Abstract: A heat-resistant, high-impact polystyrene composition is disclosed, comprising:(A) 100 parts by weight of high-impact polystyrene,(B) from 1.5 to 5 parts by weight of glass fibers,(C) from 2.5 to 10 parts by weight of a styrene-butadiene-styrene copolymer, and(D) from 0.05 to 5 parts by weight of a metal salt of a higher fatty acid,the high-impact polystyrene (A) having a polybutadiene content of from 4.5 to 8.0% by weight and an average rubber particle diameter of from 0.5 to 2.0 .mu.m and containing no plasticizer;the glass fibers (B) having an average fiber length of from 0.5 to 2 mm and an average aspect ratio of 20 or more and having undergone surface treatment with a silane coupling agent; andthe styrene-butadiene-styrene copolymer (C) having a butadiene unit content of from 40 to 80% by weight.