Abstract: The thermoplastic polymeric molding composition of the invention has good moldability in shaping by injection molding, extrusion molding and compression molding and capable of giving shaped articles having good machinability in mechanical working such as cutting, grinding and latching. The composition is compounded from 2 to 70 parts by weight of a thermoplastic polymer such as a polyamide resin and from 98 to 30 parts by weight of a metallic filler such as zinc powder and zinc oxide powder having a surface coated with a water repellent agent such as silane coupling agents, titanate coupling agents and silicone fluids in a specified amount. A part of the above mentioned particulate filler may optionally be replaced with a fibrous filler such as glass fibers and carbon fibers so that the shaped articles of the molding composition may be imparted with increased impact strength.

Abstract: The method of this invention produces a high strength, one-part fluorosilicone sealant which is stable in the absence of moisture and contains an in situ treated reinforcing silica filler. The fluorosilicone sealant is produced by a process which in situ treats the reinforcing filler with a di(trifluoropropyl)tetramethyldisilazane in the presence of a portion of the fluorosilicone polymer. The remainder of the polymer is then added and the reinforced polymer is admixed with a moisture activated curing system to give a sealant which cures upon exposure to moisture to give an elastomer. The sealant is easily extrudable from a storage container. The cured elastomer has improved tensile strength, tear strength, and elongation values. The cured elastomer, being a fluorosilicone, is resistant to non-polar organic hydrocarbon fluids such as aircraft jet engine fuels and gasoline.

Abstract: A fluorosilicone rubber with low compression set and other physical properties which are either are not significantly effected or are improved are made by curing a composition of a polydiorganosiloxane having 3,3,3-trifluoropropylsiloxane units and endblocked with vinyl or silacyclopentenyl groups, a reinforcing silica having dimethyl(3,3,3-trifluoropropyl)siloxy units as the surface treatment, and a vinyl specific organic peroxide. The polydiorganosiloxane endblocking is done by reacting a silanol endblocked polymer with a silazane.

Abstract: Compounds of the formula ##STR1## where R is alkyl, R' is independently selected from alkyl and aryl, and n ranges from 1 to 8 are useful as coupling agents in filled polymer compositions, e.g., in filled, polar polymers such as polybutylene terephthalate.

Abstract: Novel ionomeric silane coupling agents are disclosed and their use in bonding a matrix polymer to a mineral substrate is described. The coupling agents comprise amic acid-functional silanes which are partially neutralized with metal cations and are prepared by reacting a mixture of (I) an amine-functional silane, (II) a stoichiometric excess of a dicarboxylic organic acid and (III) an ionic compound containing a metal cation, wherein 10% to 80% of the excess carboxylic acid functionality is neutralized by the metal cations. The coupling agents greatly improve bonding to the matrix polymer in moist environments and are particularly suitable for use in formulating filled injection molding compositions.

Abstract: A high temperature PVC resin blend is made by blending from 60 to 85 parts PVC with no more than 40 parts of a ("alpha-SAN") copolymer of alpha-methyl styrene ("AMS"), styrene ("S") and acrylonitrile ("AN") and less than 20 parts by wt additives including stabilizers, antioxidants, lubricants, and processing aids. In addition, an impact modifier may be added. The blend with particularly sized glass fibers, may be thermoformed at an elevated processing temperature and pressure, to provide a reinforced composite in which the PVC is covalently bonded to the glass fiber. The composite has a substantially higher HDT and equivalent tensile strength, compared to that of a similarly reinforced, unblended PVC composite, without sacrificing the novel composite's other desirable physical properties.

Abstract: A process for producing a filler-containing polypropylene resin composition is disclosed. The composition comprises (a) from 27 to 87% by weight of a polypropylene resin, (b) from 3 to 15% by weight of a modified polypropylene resin containing from 0.1 to 3 mol% of an unsaturated dicarboxylic acid anhydride repeating unit, (c) from 5 to 30% by weight of an ethylene copolymer composed of from 82 to 98.7 mol% of an ethylene repeating unit, from 1 to 15 mol% of an ester repeating unit selected from alkyl acrylates and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof, and from 0.3 to 3 mol% of an unsaturated dicarboxylic acid anhydride repeating unit, and (d) from 5 to 40% by weight of a filler. The process comprises melt-mixing the components (a), (b), and (d) and then melt-mixing the resulting mixture with the component (c).

Abstract: A novel ionomeric silane coupling agent is disclosed and its use in bonding a matrix polymer to a mineral substrate is described. The coupling agent is prepared by partially neutralizing the combined acid functionality present in a mixture of an acid-functional silane (or metal salt thereof) and an acid-functional film former with a metal ion. The coupling agent greatly improves bond strength in moist environments and is particularly suitable for use in formulating filled injection molding compositions.

Abstract: A polyester composition which comprises a polyester being processable in the melt state and being capable of forming the anisotropic phase in the melt state and an inorganic filler having been surface treated with an epoxysilane compound.

Abstract: An aromatic polysulfone resin composition with excellent plating characteristics comprising:(A) 50 to 90% by weight of an aromatic polysulfone,(B) 3 to 40% by weight of wollastonite of which 90% by weight or more of the total amount have a particle size smaller than 300 meshes, and(C) 3 to 30% by weight of an alkaline earth metal carbonate is disclosed.This aromatic polysulfone resin composition has excellent mechanical properties, thermal properties (in terms of thermal deformation temperature and linear thermal expansion coefficient), dimensional stability, thermal stability during processing and surface smoothness and also shows excellent plating characteristics in a wide range of plating conditions (etching conditions). By using this aromatic polysulfone resin composition, it is possible to easily obtain a printed circuit board having a desired configuration by means of injection molding, and it becomes possible to form the circuits with a fine line width.

Abstract: Organopolysiloxanes having improved electrical properties, which comprises mixing an organopolysiloxane having reactive groups with an amine-containing organosilicon compound, which is capable of crosslinking with the organopolysiloxane and a treated alumina trihydrate and thereafter exposing the resultant composition to atmospheric moisture. The resultant composition may be dispersed in an organic solvent and applied to electrical insulators.

Abstract: Composite material based on a polymeric or copolymeric substance which may be a thermoplastic or thermosetting material or rubber, and an organic material which is cellulosic or starch. The cellulosic material is grafted with a silylating agent. Processes for preparing this composite are also disclosed.

Abstract: The cohesion, creep resistance and yield strength of pigmented chlorinated polyvinyl chloride resin, polyvinyl chloride resin, or blends thereof is improved by coating the pigment with an amino silane coupling agent prior to blending the resin and the pigment.

Abstract: A rubber composition for tires having improved heat build-up and high temperature reinforcibility comprises specified amounts of particular surface-treated carbon black, silica and particular silane coupling agent based on 100 parts by weight of rubber ingredient.

Abstract: Vinyl chloride (VC) resins, particularly poly(vinyl chloride) (PVC) and chlorinated poly(vinyl chloride) (CPVC) are reinforced with glass fibers which have been sized with a particular aminosilane coupling agent and a particularly characterized basic film former. At the processing temperature of VC resin, containing a stabilizer against degradation during thermoforming, for example in an extruder, or on a mixing mill used to blend the resin with sized glass fibers, a reaction occurs between an aminosilane coupling agent and the VC resin which reaction involves C.dbd.C bonds in the homopolymer, provided the polymer film former in the size is more basic than poly(vinyl acetate) ("PVA"). The film former catalyzes the thermal dehydrohalogenation of the VC homopolymer at the fiber-resin interface so as to generate allylic Cl moieties in chains of the homopolymer, which moieties react with the amine groups of the aminosilane.

Abstract: A modified powder or particulate material having a silicone polymer film coated on substantially the entire surface thereof, this powder or particulate material being produced by bringing at least one silicone compound, in the form of a vapor, having the general formula (I):(R.sup.1 HSiO).sub.a (R.sup.2 R.sup.3 SiO).sub.b (R.sup.4 R.sup.5 R.sup.6 SiO.sub.1/2).sub.c (I)wherein R.sup.1, R.sup.2, and R.sup.3 represent, independently, hydrogen or a hydrocarbon residue having 1 to 10 carbon atoms, which may be substituted with at least one halogen atom, provided that R.sup.1, R.sup.2, and R.sup.3 are not hydrogen at the same time, R.sup.4, R.sup.5, and R.sup.

Abstract: An adhesive composition which is particularly suitable for use as a die-attach adhesive. The adhesive composition comprises the reaction product of an admixture of an effective amount of a phenoxy resin, at least one epoxy resin and a fluorene curative.

Abstract: A process for preparing an .alpha.-cyanoacrylate compound characterized by the steps of thermally depolymerizing a condensation product obtained from a cyanoacetic acid ester, and formaldehyde or a polymer thereof using as a catalyst a polymerizable imine represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and are each CH.sub.3 or H to obtain a crude monomer, and rectifying the crude monomer and an adhesive composition comprising as its main component an .alpha.-cyanoacrylate compound prepared by the above process.

Abstract: A filler-containing polypropylene resin composition and a process for producing the same are disclosed. The composition comprises (a) from 27 to 87% by weight of a polypropylene resin, (b) from 3 to 15% by weight of a modified polypropylene resin containing from 0.1 to 3 mol % of an unsaturated dicarboxylic acid anhydride repeating unit, (c) from 5 to 30% by weight of an ethylene copolymer composed of from 82 to 98.7 mol % of an ethylene repeating unit, from 1 to 15 mol % of an ester repeating unit selected from alkyl acrylates and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof, and from 0.3 to 3 mol % of an unsaturated dicarboxylic acid anhydride repeating unit, and (d) from 5 to 40% by weight of a filler. The process comprises melt-mixing the components (a), (b) and (d) and then melt-mixing the resulting mixture with the component (c).

Abstract: The rubber composition without formulating a carbon black filler has a remarkably low Mooney viscosity and still is capable of giving a rubber vulcanizate having excellent mechanical properties. The rubber composition comprises, in addition to natural rubber or a diene-based synthetic rubber and a non-carbon inorganic filler, a specific poly(dialkoxysiloxane) terminated at each molecular chain end with a polysulfide linkage-containing group of the formula (RO).sub.3 Si--R.sup.1 --S.sub.x -- R.sup.1 --bonded to the terminal silicon atom, in which R is an alkyl group, e.g. methyl and ethyl, R.sup.1 is a divalent hydrocarbon group, e.g. --CH.sub.2 CH.sub.2 CH.sub.2 13 , and x is a positive integer of 2 to 6 or, typically, 4.

Abstract: A filled engineering plastic is provided with improved impact strength by pretreating the filler to provide separate coating deposits of a coupling agent and an impact modifier for the plastic matrix. For a nylon plastic composite, a kaolin filler coated with separate deposits of an amino functional silane coupling agent and a phenol or triethanolamine impact modifier has resulted in an improved impact strength without sacrificing tensile and elastic properties of the nylon.

Abstract: Silica fume subject to a mechanical reduction in size by a milling process such as a fluid energy mill or jet mill is disclosed. The overall size reduction is at least 10%. The milled silica fume product should have not more than 0.5% by weight unable to pass through a 325 mesh screen. The milled silica fume can be used in thermoplastic resins, cementitious material and refactory material. The use of the milled silica fume with UPVC or PVC to make conduit with improved elastic modulus, improved impact resistance, decreased wall thickness and increased calcium carbonate content is specifically disclosed.

Abstract: The present invention relates to an instantaneous adhesive composition which is satisfactorily made thixotropic or gelled and has a rapid setting time and an excellent adhesive strength, said composition being obtained by adding to an .alpha.-cyanoacrylate a silica gel treated with a silyl isocyanate.

Abstract: A coupling agent composition comprised of the reaction product of (a) about two mole parts of maleic anhydride with (b) about one mole part of a diamine functional silane compound of the general formula ##STR1## where R denotes an alkyl radical, R' denotes an alkyl radical, R" and R'" denote alkylene radicals and x is 0 or 1; and (c) sufficient solvent to solubilize (a) and (b).

Abstract: Silanes grafted onto celluloses and lignocelluloses' fibers, in presence of free radical initiator, reinforced thermoplastic composites, which replace the inorganic fillers. Polyethylene composites are prepared by a hot melt mixing process, wherein the cellulosic molecules graft with silanes, and part of the thermoplastic polymer, can be initiated to attach with the maleic anhydride present. The grafted cellulose molecules with aminosilanes combine easily and strongly with that maleiated polymer to give the superior composite properties. The silanes grafted onto organic fillers proved to be higher in energy, secant modulus, tensile strength and strain compared to inorganic fillers such as glass fibers or mica composites. Noting that the cost of silanes grafted onto cellulosic or lignocellulosic fibers are several times lower than that of treated glass fibers or mica.

Abstract: The rubber composition is formulated with (A) a combination of an ethylene-propylene copolymeric rubber and an organopolysiloxane having at least two alkenyl groups per molecule as the polymeric base, (B) a reinforcing silica filler, (C) an alkoxysilane compound and (D) a thiocarbamyl-containing organosilane compound. The rubber composition can be vulcanized with an organic sulfur compound or organic peroxide as the vulcanizing agent to give a vulcanizate having quite satisfactory mechanical properties including, in particular, greatly improved heat resistance and greatly decreased permanent compression set even without using carbon black as the reinforcing filler. The omission of carbon black in the formulation gives an advantage that the rubber may be colored in any light color.

Abstract: A filler composition containing at least two surface modifiers and comprising a powdered inorganic filler, a carboxylic acid or mixture of carboxylic acids and an organosilane. A preferred filler composition comprises alumina trihydrate, isostearic acid and vinyl-tris (2-methoxyethoxy) silane. When filler compositions containing both the carboxylic acid and organosilane surface modifiers are blended with thermoplastic resins to form thermoplastic compounds, the resulting filled compounds display improved physical properties compared with controls.

Abstract: A glass fiber reinforced resin composition suitable as an injection molding material for automobile instrument panels. Essentially the resin composition is a blend of 55-77 wt % of a propylene-ethylene block copolymer at least partially modified by graft copolymerization with an unsaturated carboxylic acid or its derivative, 5-15 wt % of an ethylene-propylene rubber in which the content of ethylene is 60-85 wt % and 18-30 wt % of glass fiber having a filament diameter of 8-15 .mu.m. The melt flow index of the modified propylene-ethylene block copolymer and the Mooney viscosity of the ethylene-propylene rubber are strictly specified. The resin composition is pelletized from a melted state such that the glass fiber dispersed in the pellets is not smaller than 550 .mu.m and, preferably, not greater than 1100 .mu.m in mean filament length. This resin composition is good in moldability and provides instrument panels high in rigidity, in heat distortion resistance and also in impact resistance.

Abstract: The invention is directed to the modification of synthetic, silicatic fillers with water insoluble sulfur containing organosilicon compounds. For this purpose, the fillers are converted into an aqueous suspension and treated with the organosilicon compounds, optionally in the presence of an emulsifier. The thus modified filler in vulcanized rubber mixtures results in a clear improvement in the industrial properties of the rubber.

Abstract: Compositions which are particularly useful as coupling agents and primers for polyolefin composites. The compositions comprise fumaric acid and diaminefunctional silanes in mole ratios from 1.0 to 1.4 in nonreactive solvent, particularly water. These compositions are particularly effective in polyethylene composite materials.

Abstract: An adhesive composition characterized in that the composition is prepared by subjecting finely divided hydrophobic silica surface-treated with hexamethyldisilazane to a heat treatment under a reduced pressure, subsequently treating the silica with an acid gas, and admixing the resulting silica with an .alpha.-cyanoacrylate.

Abstract: A novel class of fatty ethenoid acylaminorganosilicon compounds are provided which are useful as coupling agents for fiber glass reinforced resin composites.

Abstract: A novel polyurethane can be used to form asymmetrical laminates with glass and plastics such as polycarbonate at temperatures below 150.degree. F. The polyurethane is a reaction product of a diisocyanate, a high molecular weight polyether glycol or polyester glycol, and at least two different diols.

Abstract: An epoxy resin powder coating composition is described, comprising an epoxy resin and at least a hardener and a filler compounded thereto, wherein the filler is a mixture of from 30 to 180 parts by weight of a needle-like glass powder having an average length of at least 40 .mu.m and an aspect ratio of at least 4:1 and at least 30 parts by weight of a granular inorganic filler having an average particle diameter of 1.0 .mu.m or less, both being based on 100 parts by weight of the epoxy resin. This powder coating composition can provide a coating exhibiting excellent impact resistance not only at room temperature but also at lower temperatures, and further having good flexibility. A steel member with the coating of the present powder coating composition has a high practical value.

Abstract: An acrylic copolymer latex sealant composition, which comprises an acrylic copolymer having a glass transition temperature not exceeding about -0.degree. C., a hydrolyzed organoaminosilane, an anionic, non-ionic or amphoteric surfactant, water, and at least about 0.5% by weight silica, based on the total amount of the composition.

Abstract: Binding agent compositions for inorganic fillers or oxides containing a curable binder such as a hardenable resin, and a ureido-functional organosilicon compound as described. Foundry sand compositions including binding agent compositions as described, sand and a catalyst for the hardenable resin. Shaped products comprising inorganic oxide particles, e.g., sand, a binding agent composition as described and catalyst for the hardenable resin wherein the hardenable resin is in its hardened form. Novel ureido-functional organosilicon compounds having two hydrolyzable or hydroxy groups to the molecule and at least one ureido-functional group in which the ureido group is connected to silicon by means of a group containing at least five carbon atoms.

Abstract: A glass fiber reinforced resin composition is described, comprising the following components: (a) 30 to 98 parts by weight of a crystalline propylene polymer; (b) 2 to 30 parts by weight of a glass fiber having an average diameter of 10.mu. or less, the amount of a binder deposited being from 0.01 to 0.3% by weight; (c) 0 to 35 parts by weight of an ethylene-based rubber; (d) 0 to 30 parts by weight of at least one inorganic filler selected from talc, mica, calcium silicate and glass powder; and (e) 0 to 10 parts by weight per 100 parts by weight of the sum of the components (a) to (d) of a pigment comprising a coloring component and a dispersing component, the proportion of a coloring matter or matters having a Mohs hardness of 3.5 or more in the coloring component being less than 30% by weight. This composition is superior in high temperature stiffness, appearance, and pelletizability, and is satisfactory in an amount of warp of article or re-heating warp, and impact strength.

Abstract: A novel optically clear combination which is a composition of matter is disclosed. The disclosed composition is an EPDM vulcanizate of remarkable clarity, the formulation of which involves a synergistic combination of EPDM elastomer, fumed silica, coupling agent, antioxidant, at least one and preferably two curing coagents, and preferably an antistatic agent.

Abstract: Solvent resistant, vulcanizable silicone rubber compositions are improved by using a class of hydrosiloxy (silicon hydride) polymer cross-linking agents in a blend of a vinyl-containing polymer, a suitable catalyst and a siloxane resin. One hydrosiloxy polymer cross-linking agent is a copolymer having about 0.75 to about 3.0 moles of R.sub.2 HSiO.sub.0.5, about 0.37 to about 1.5 moles of R"SiO.sub.1.5, and about 0.5 to about 1.5 moles of SiO.sub.2, wherein R is selected from the group consisting of alkyl radicals of 1 to about 8 carbon atoms and phenyl; and R" is a (--CH.sub.2 --).sub.a R' radical where R' is perfluoroalkyl of 1 to about 8 carbon atoms, a is at least 2 but less than 10, and (--CH.sub.2 --) is straight or branched chain; and the copolymer has a viscosity of about 30 to about 4,000 centipoise at 25.degree. C.

Abstract: The presence of immiscible silica treating agents in high viscosity, pumpable polyorganosiloxane compositions alters the rheology of these compositions sufficiently to permit fabrication of unsupported profiles that retain their initial configuration during heat curing. The immiscible treating agent constitutes from 20 to 100 percent by weight of the total treating agent present in the composition.

Abstract: A noncuring transparent organopolysiloxane composition obtained from a mixture of phenyl containing organopolysiloxane with at least 50% methyl radicals and 5 to 20% phenyl radicals and a finely divided silica treated with a phenyl containing silane or polysiloxane and a hydroxyl or hydrolyzable group is used in optical communications components, such as filler or a coupling agent.

Abstract: The impact strength of thermoplastic poly(ethylene terephthalate) molding compositions containing a reinforcing filler (preferably glass fiber), an epoxidized crystallization promoter (e.g., an epoxidized vegetable oil) and a nucleating agent (e.g., sodium stearate) is markedly improved by including in the composition a small amount of an organofunctional silane, i.e., a compound characterized by having a functional substituent at the end of a methylene chain bound to a silicon atom to which are also bonded a plurality of readily hydrolyzable groups. A few such compounds are gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma-aminopropyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane. The formulations may also contain a warp-reducing filler such as mica. Organofunctional silanes typically have application in thermoplastic polymers only as coupling agents, i.e.

Abstract: Vinyl chloride (VC) resins, particularly poly(vinyl chloride) (PVC) and chlorinated poly(vinyl chloride) (CPVC) are reinforced with glass fibers which have been sized with a particular aminosilane coupling agent and an alkylene oxide-containing film former. This combination of sizing components, among all others, generates allylic Cl atoms in the VC chain of the polymer. Though the VC resin contains an adequate amount of stabilizer to counter the formation of such allylic Cl atoms in the mass of the resin, enough are generated near the surface of the glass to cause a reaction with the aminosilane so as to bond the glass fibers to the VC resin so strongly that a composite only fails in coherent failure. The sizing consists essentially of (i) an aminosilane coupling agent having a reactive amine moiety which upon reaction with the VC resin results in a compound having a peak in a proton magnetic resonance spectra at 5.

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 treating agent. 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: Molding compositions for the fabrication of shaped articles having enhanced mechanical properties are comprised of (i) a polymeric matrix, (ii) an inorganic reinforcing filler material therefor, and, advantageously, (iii) a polymer/filler coupling agent, said reinforcing filler material consisting essentially of intimate admixture of enstatite and silica advantageously prepared by calcination of a precursor clay at a temperature of at least 800.degree. C.

Abstract: The invention relates to mixtures essentially composed of a polyoxymethylene, a polyurethane and a filler, the polyurethane having a Shore hardness A of not more than 90 and the filler having an average particle size less than 10 .mu.m.The shaped articles produced from the mixture according to the invention are distinguished, above all, by improved notched impact strength.

Abstract: The invention is directed to the modification of natural oxidic or silicate fillers with water insoluble sulfur containing organosilicon compounds. For this purpose, the fillers are converted into an aqueous suspension and treated with the organosilicon compounds, in a given case in the presence of an emulsifier.

Abstract: The processibility of high viscosity, marginally extrudable polyorganosiloxane compositions containing a reinforcing silica filler and a filler treating agent to prevent crepe hardening of the compositions is improved by the presence in said treating agent of at least one component that is incompatible with the polydimethylsiloxane portion of the curable composition prior to the reaction of said component with the filler.

Abstract: A primer composition for fluorocarbon polymer coatings which cures at ambient temperatures and contains a fluorocarbon polymer of vinylidene fluoride and hexafluoropropylene and has a weight average molecular weight of about 50,000-300,000;a metallic oxide such as magnesium oxide which is an acid acceptor andan amino alkyl alkoxy silane; preferably, the primer contains a reinforcing pigment such as titanium dioxide;The primer is used in combination with fluorocarbon polymer coatings to provide corrosion and abrasion resistant coatings for equipment used in chemical plants, oil refineries, oil drilling platforms, and for the interior of smoke stacks of large utility companies.

Abstract: The water resistance exhibited during the curing of certain moisture curable RTV polyorganosiloxane compositions containing calcium carbonate fillers is significantly increased by treating the calcium carbonate with a hydrophobicizing agent selected from cationic surfactants, nonionic surfactants having HLB values of 10 or less, and organosilanes.