Abstract: In preparing bioabsorbable polyesters containing glycolic acid unit and/or lactic acid unit by the polymerization of glycolide and/or lactide, compositions comprising polyester-silicone copolymers obtained by conducting polymerization in the presence of silicones and the effect of merely mixing the above bioabsorbable polyesters with certain kind of silicones upon the modification, thereby attaining flexibility in particular, of the bioabsorbable polyesters, are disclosed.

Abstract: Novel compositions for stabilizing chlorinated polymers, copolymers and homopolymers comprising dawsonite, an organotin .beta.-diketonate, an organic zinc compound, and an organic calcium, magnesium, barium or lanthanide compound are disclosed. The compositions of the present invention enable the content of epoxidized oils to be decreased in chlorinated polymers while preserving thermal stability.

Abstract: The invention relates to improved flame retardant crosslinkable compositions useful as insulation coatings for wire and cable based on ethylene-vinyl ester and ethylene-alkyl acrylate copolymers. The compositions contain a hydrated inorganic filler, an alkoxysilane, an antioxidant and a hydrocarbon processing oil. Organic peroxides are preferably employed to facilitate crosslinking. A method for providing the improved flame retardant crosslinkable compositions and electrical conductors coated therewith are also provided.

Abstract: A coating composition is disclosed comprising an organosilane polymer, a polyester or a copolymer thereof, an amino resin crosslinking agent, and a silsesquioxane compound. Such a composition is especially useful for providing a flexible finish on non-metallic parts of automobiles and trucks. This finish has the advantage of superior etch resistance and outstanding weatherability and durability characteristics.

Abstract: A silicone rubber composition having excellent workability and extrusion-moldability and capable of giving cured silicone rubber articles having good mechanical properties is proposed, which is prepared by admixing, in addition to the conventional ingredients of an organopolysiloxane gum, a finely divided reinforcing silica filler and a curing agent such as an organic peroxide, a low molecular-weight organopolysiloxane having, in a molecule, at least three silanolic hydroxy groups which serves as a wetting agent of the silica filler so as to improve the compatibility of the silica filler with the organopolysiloxane gum giving a possibility of increasing the amount of the silica filler without adverse influences such as a decrease in the plasticity of the composition.

Abstract: The present invention relates to glass filled poly(arylene sulfide) molding compositions which upon being molded result in products having improved mechanical properties. Methods of preparing the compositions, methods of using the compositions to form molded products and the molded products so produced are also provided. The compositions are comprised of poly(arylene sulfide) resin, glass reinforcement material, an epoxysilane and an organic phosphite.

Abstract: Improved flame retardance and smoke/heat reduction has been imparted to polyphenylene ethers by blending the polyphenylene ethers with organopolysiloxane fluids having a critical mole % range of chemically combined phenylsiloxane units.

Abstract: The incorporation of silicone treated filler selected from carbon black, titanium dioxide or clay into polycarbonates or polyester carbonates has been found to provide polycarbonate compositions having improved flame retardant properties.

Abstract: The polyarylene sulfide resin composition is improved in impact strength and rigidity and useful as engineering plastics. It is prepred by mixing 100 parts by weight of a resin component comprising(A) 99 to 20 parts by weight of a polyarylene sulfide resin and(B) 1 to 80 parts by weight of a polyamide resin with(C) 0.5 to 50 parts by weight of an olefin copolymer comprising an .alpha.-olefin and a glycidyl ester of an .alpha., .beta.-unsaturated acid,(D) 0.01 to 5 parts by weight of an alkoxysilane compound and(E) 0 to 400 parts by weight of one or more fillers selected from among fibrous, powdery and flaky ones.

Abstract: Aqueous polymer composition for application to synthetic polymeric materials to improve wettability of same by polymer matrices and bond strength therebetween, which includes a polymer containing vinyl groups, in at least one and preferably two fluorocarbon surfactants and water. The composition also optionally, and preferably includes a copolymerizable surfactant and ethoxy silicone. Synthetic polymeric materials treated with the aqueous polymer composition are disclosed primarily as reinforcing materials in structural composites, either alone or in conjuction with other reinforcing materials. Composites utilizing the pretreated reinforcing materials are also included.

Abstract: A composite having third order non-linear optical activity comprising, an organic polymer and an inorganic material. The organic polymer has third order nonlinear optical activity and the inorganic material is a sol-gel glass. The organic polymer or a precursor of the organic polymer is mutually soluble with a precursor of the sol-gel glass. The invention also includes photonic media having the above composite and a method of making the composite.

Abstract: The present invention relates to a process for producing a plastic lens having a high refractive index and profile regularity comprising forming a mixture of one or more of sulfur-containing aromatic polyisocyanate compounds, one or more of active hydrogen compounds selected from the group consisting of polyol compounds and polythiol compounds, and at least one internal mold releasing agent, and subjecting the resulting mixture to casting polymerization, and a plastic lens obtained according to the process.

Abstract: This invention discloses an adhesive organopolysiloxane compositions which cure in the presence of addition reaction catalysts and adhere firmly to various materials when they harden comprising;(1) 100 parts by weight of an organopolysiloxane containing at least alkenyl groups bonded to silicon atoms in 1 molecule,(2) an organohydrogenpolysiloxane containing at least 3 hydrogen atoms bonded to silicon atoms in 1 molecule, in sufficient quantity to donate 0.5-10 hydrogen atoms bonded to silicon atoms to 1 alkenyl group in said 1st constituent,(3) 0.1-20 parts by weight of an organosilicone compound containing at least 1 hydrogen atom bonded to silicon atoms, at least 1 fluoroalkyl group or fluoroalkylether group bonded to silicon atoms via carbon atoms and at least 1 epoxy group and/or trialkoxysilyl group bonded to silicon atoms via carbon atoms in 1 molecule, and(4) platinum or a platinum compound in suitable quantity to act as a catalyst.

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

Abstract: A polycarbonate resin composition for radiation sterilization, comprising an aromatic polycarbonate resin having structural units derived from a halogenated bisphenol, and a polyalkylene compound selected from poly(alkylene glycol), its ether, silyl ether or ester. Molded articles produced from the composition do not substantially undergo yellowing when exposed to radiation in air or under a substantially oxygen-free atmosphere, and can be advantageously employed in medical appliances.

Abstract: Provided is an elastic polyurethane fiber having excellent hot water resistance, elastic recovery at low temperatures and elongation, prepared from a polyurethane obtained by copolymerization of a high polymer diol obtained from 3-methyl-1,5-pentanediol and an aliphatic dicarboxylic acid, an organic diisocyanate and a chain extender.

Abstract: An addition reaction-type adhesive silicone composition comprising (A) an alkenyl group-containing polyorganosiloxane; (B) a polyorganohydrogensiloxane; (C) at least two members selected from the group consisting of (1) (meth)acryloxy group-containing alkoxysilanes or siloxanes, (2) epoxy ring-containing alkoxysilanes or siloxanes and (3) isocyanurate compounds; and (D) Pt, Pd, or Rh compounds. The composition exhibits excellent adhesiveness for plastic materials, and its cured products have excellent heat-resistant and moisture-resistant properties.

Abstract: A polymethylsilsesquioxane powder surface-treated with an organosilicone compound represented by the formula:(R.sup.1.sub.a R.sup.2.sub.3-a Si).sub.b Zwherein R.sup.1 represents an alkyl group substituted by a perfluoroalkyl group; R.sup.2 represents an unsubstituted monovalent hydrocarbon group; a is an integer of from 1 to 3; b is 1 or 2; and when b is 1, Z is selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxyl group, --OR.sup.3, --NR.sup.3 X, --ON(R.sup.3).sub.2 and --OCOR.sup.3, and when b is 2, Z is selected from the group consisting of --O--, --N(X)-- and --S--, in which R.sup.3 represents an alkyl group having 1 to 4 carbon atoms and X is selected from the group consisting of a hydrogen atom and an alkyl group having 1 to 4 carbon atoms.

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

Abstract: The combination of (1) long term storage stability, (2) a relative short cure time at temperatures below about 150.degree. C. and (3) cohesive bonding of the cured elastomer to a variety of substrates is achieved in a one-part organosiloxane composition that cures by a platinum-catalyzed hydrosilylation when the composition includes an acetylenic alcohol containing at least eight carbon atoms as the catalyst inhibitor and, as the adhesion promoter, an alkoxysilane containing an epoxy group and a polyorganosiloxane containing an average of at least one silicon-bonded hydroxyl group and at least one silicon-bonded vinyl radical per molecule. The concentrations of catalyst and adhesion promoter are within specified limits.

Abstract: A liquid composition for protecting a positively charged surface, the composition comprising: negatively charged polytetrafluoroethylene polymer resin particles and at least one member of the group consisting of methyltrimethoxysilane and an amino functional polysiloxane; whereby the negatively charged polytetrafluoroethylene molecules fuse to the surface upon exposure to ambient temperatures above about 68 degrees Fahrenheit.

Abstract: Disclosed is a casting resin based on acrylic acid esters having a high content of finely dispersed fillers and containing a mixture of organosilicon compounds having functional groups and metallic acid esters of metals of Groups IVB and VB of the Periodic Table of the Elements. The functional group of the organosilicon compound is ethylenically unsaturated and bound to the silicon atom either directly or through alkylene groups. The addition of this mixture to the casing resins produces a desirable reduction of the viscosity of these resins, which are used, for example, for the manufacture of sanitary articles.The filler content is at least 20% and can be as high as 95% with the proviso that when the filler content is in excess of 80 wt. -%, the filler contains 10 to 30 wt. -%, based on the total weight of filler, of fines having a particle size less than 0.1 mm and the remainder of the filler being coarse up to 4 mm.

Abstract: An aqueous solution of suspension of glycidoxypropyl silanol and polydimethyl siloxanes having a number average molecular wieght of more than 100,000 and their use as mold release agents with good release values over a relatively large number of molding cycles in the molding of rubber and plastics.

Abstract: Certain crystallization accelerators, such as 1,3-dixylenoxy-1,1,3,3-tetramethyl-disiloxane have been found effective for greatly enhancing the crystallization rate and broadening the temperature region in which crystallization of biphenol-organosilicon reaction products can occur from the melt during cooling.

Abstract: A polyimide coating composition comprising an homogeneous liquid solution of (a) a polyimide or polyimide precursor, (b) a substituted silane compound and (c) aprotic solvent.

Abstract: The invention features in synergistic combination a new chemistry for fabricating wire and cable insulation and heat-shrinkable tubing and an irradiation process for providing the insulation with both increased tensile strength and increased elongation.The chemistry utilizes a polycondensation-type process wherein a hydrophobic olefinic terpolymer base material having 3% or less carboxyl groups and a hydrophilic flame retardant filler material containing hydroxyl groups is linked to a silicone material containing silanol groups.The insulation is further characterized by an oxygen index in excess of 50.0, resulting from high loadings of the fire retardant filler material, generally in excess of 200 parts by weight of the total material weight.

Abstract: Novel polyphenylene ether-polyamide compositions having improved compatibility, elongation and impact properties as well as improved processability are prepared comprising one or more polyphenylene ethers, one or more polyamides and a property improving silane derivative compound having in the molecule both (a) at least one silicon bonded to a carbon through an oxygen link and (b) at least one ethylenic carbon-carbon double bond or carbon-carbon triple bond and/or functional group selected from the group consisting of an amine group or a mercapto group, with the proviso that the functional group is not directly bonded to a silicon atom. These compositions may further comprise a polymeric impact modifier therefore and/or an inorganic reinforcing additive and/or other polymers including alkenyl aromatic polymers.

Abstract: A silicon rubber composition comprising (I) a vinyl-containing diorganopolysiloxane, (II) an organohydrogenpolysiloxane, and (III) platinum or a platinum compound is improved in adhesive bond to various substrates under low-temperature curing conditions by blending (IV) an ester siloxane compound free of a silicon-to-carbon bond and (V) an epoxy-containing polysiloxane compound.

Abstract: Straight oil compositions for fibrous materials, which provide excellent smoothness and antistatic properties and also have excellent spearation resistance, even without compatibilizers, comprise (A) 100 parts by weight of dimethyl polysiloxane having a viscosity of from 3 to 30 cSt at 25.degree. C. and (B) 0.5 to 50 parts by weight of a polyoxyalkylene group-terminated organopolysiloxane. The polyoxyalkylene groups of Component (B) have a block structure of polyoxypropylene and polyoxyethylene units, with the former being bonded to the siloxane moiety. Component (A) is preferably a trimethylsiloxy-terminated polydimethylsiloxane.

Abstract: Organopolysiloxane fluids, thiofunctional polysiloxane fluids, or blends of organopolysiloxane fluids and thiofunctional polysiloxane fluids are stabilized against degradation in the presence of kaolin clays at elevated temperatures by adding an epoxy containing compound.

Abstract: 1. A composition comprising:(a) a homopolymer of ethylene having a density in the range of about 0.915 to about 0.925 gram per cubic centimeter and a melt index in the range of 0.1 to about 5 grams per 10 minutes or a copolymer of ethylene and one or more alpha-olefins, each having 3 to 8 carbon atoms, said copolymer having a density in the range of about 0.880 to about 0.915 grams per cubic centimeter and a melt index in the range of about 0.1 to about 10 grams per 10 minutes; and p1 (b) a polysiloxane having the formula: ##STR1## wherein: R=alkyl having 1 to 4 carbon atoms, acyl having 1 to 4 carbon atoms, or trimethyl silyl, and each R is alike or differentR'=alkyleneoxy having 3 to 11 carbon atomsR"=hydrogen or alkylhydroxy having 3 carbon atoms and 2 hydroxyl groups.x=about 2 to about 20y=about 2 to about 20, andthe hydroxyl content of the composition is at least about 0.15 percent by weight based on the total weight of the composition.

Abstract: Organopolysiloxane fluids, thiofunctional polysiloxane fluids, or blends of organopolysiloxane fluids and thiofunctional polysiloxane fluids are stabilized against degradation in the presence of kaolin clays at elevated temperatures by adding an epoxy containing compound.

Abstract: Organosilicon compounds of a novel class are disclosed including .alpha.,.omega.-bis(alkoxy silyl)-substituted alkane compounds represented by the general formula(RO).sub.m (CH.sub.3).sub.3-m Si--CH.sub.2).sub.n Si(CH.sub.3).sub.3-m (OR).sub.m,in which R is a monovalent hydrocarbon group having 1 to 4 carbon atoms, e.g., methyl and ethyl, the subscript n is a positive integer in the range from 10 to 18 and the subscript m is 1, 2 or 3. The compound is useful as an additive in various kinds of synthetic resin-based compositions for the purpose of improving the properties such as flexibility, weatherability, cold resistance and mechanical strengths.

Abstract: Novel polyphenylene ether-polyamide compositions having improved compatibility, elongation and impact properties as well as improved processability are prepared comprising one or more polyphenylene ethers, one or more polyamides and a property improving silane derivative compound having in the molecule both (a) at least one silicon bonded to a carbon through an oxygen link and (b) at least one ethylenic carbon-carbon double bond or carbon-carbon triple bond and/or functional group selected from the group consisting of an amine group or a mercepto group, with the proviso that the functional group is not directly bonded to a silicon atom. These compositions may further comprise a polymeric impact modifier therefore and/or an inorganic reinforcing additive and/or other polymers including alkenyl aromatic polymers.

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

Abstract: An improved self-bonding curable organopolysiloxane composition which contains (A) an organopolysiloxane having at least 2 silicon-bonded alkenyl groups in each molecule, (B) an organopolysiloxane having at least 2 silicone-bonded hydrogen atoms in each molecule, (C) a catalytic quantity of a platinum-type catalyst, (D) a carbonyl complex of a Group VIB element, and (E) a compound containing a silicon-bonded alkoxy group which is selected from the group consisting of silanes or siloxane oligomers. Examples of the carbonyl complex are molybdenum hexacarbonyl, tungsten hexacarbonyl, and chromium hexacarbonyl.

Abstract: A thermosetting polymide resin composition having an excellent molding processing property, heat resistance, low mold shrinkage, and good external appearance of its manufacture which comprises a modified bismaleimide resin prepared by reacting the Michael addition reaction of bismaleimides with aromatic primary diamines and aromatic secondary diamines, an inorganic filler, silicone oil, and a mixed catalyst composed of organic peroxides and imidazoles.

Abstract: A polyorganosilsesquioxane fine powder which is surface-treated with an organosilicon comound containing a quaternary ammonium group, represented by the formula (I) or (II): ##STR1## wherein R.sup.1 represents an alkyl group, a substituted or unsubstituted aralkyl group, or a group represented by (C.sub.n H.sub.2n O).sub.m Z wherein Z represents a hydrogen atom or an alkyl group, symbol n is an integer of 2 to 4, and symbol m is an integer of 1 to 20; R.sup.2 and R.sup.3 each independently represents a hydrogen atom, an alkyl group or a hydroxyalkyl group; Q.sup.1 and Q.sup.2 each independently represents an alkylene group; R.sup.4 represents an alkyl group or a phenyl group; R.sup.5 represents an alkyl group having 1 to 4 carbon atoms; X.sup.- represents an anion; and symbol a is an integer of 0 to 3.

Abstract: Organopolysiloxane compositions that are storage-stable under anhydrous conditions, but curable into elastomeric state in the presence of moisture and, thus, are well suited as sealants and coatings and which particularly strongly adhere to substrates used in the construction industry, contain at least one .alpha., .omega.-dihydroxydiorganopolysiloxane polymer; at least one ketiminoxysilane crosslinking agent therefor; a bonding agent including admixture, or reaction product of, (i) an aminoorganosilicon compound containing a primary amine group, with (ii) an organosilicon compound containing an epoxy functional group; and, advantageously, a filler material and a curing catalyst.

Abstract: The present invention relates to glass filled poly(arylene sulfide) molding compositions which upon being molded result in products having improved mechanical properties. Methods of preparing the compositions, methods of using the compositions to form molded products and the molded products so produced are also provided. The compositions are comprised of poly(arylene sulfide) resin, glass reinforcement material, an epoxysilane and an organic phosphite.

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

Abstract: Organopolysiloxane compositions curable by a hydrosilylation reaction contain a novel adhesion promoter consisting essentially of (1) a carboxylic acid ester containing an acryloyloxy or methacryloyloxy group and an alcoholic functional group and (2) an organosilicon compound containing a silicon-bonded vinyloxy or substituted vinyloxy group. The compositions exhibit excellent adhesion to both organic and inorganic substrates that are in contact with the compositions during curing. The adhesion on plastics is especially good.

Abstract: Diorganopolysiloxanes containing itaconate functional groups include at least one recurring structural unit of the formula (1): ##EQU1## in which a is 1 or 2; the symbol Z is one of the radicals --CH.sub.2 CH(COOR')CH.sub.2 COOR' and --C(CH.sub.3)(COOR')CH.sub.2 COOR'; the symbols R, which may be identical or different, are each a C.sub.1 -C.sub.20 alkyl, vinyl, phenyl or 3,3,3-trifluoropropyl radical, and, in the case where a=2, one of the radicals R may be a hydroxyl group; and the symbols R', which may be identical or different, are each a C.sub.1 -C.sub.12 monovalent hydrocarbon radical or a C.sub.2 -C.sub.12 monovalent alkoxyalkyl radical, and are useful, e.g., as PVC lubricants and hydraulic fluids; they are facilely prepared by hydrolysis/polycondensation or by hydrosilylation.

Abstract: Molded articles such as gaskets for container caps are made from a thermoplastic composition at high speed, for instance above 100 per minute, by continuously cutting a continuous supply of molten thermoplastic composition into molten pieces and transferring the molten pieces to a molding position at which they are molded into the gaskets or other desired articles, and the composition includes a melt-release material that continuously replenishes a melt-release layer on the surfaces by which the molten composition is cut and transferred to the molding position.

Abstract: Primer composition for glass comprising a silane coupling agent, a reaction product of a polyisocyanate and a silane compound, a film-forming agent, and an acidic carbon black having pH 2.5 to 4. Said primer composition has extremely high weatherability and is useful as a primer for glass, particularly for applying to window glass of automobiles.

Abstract: The invention relates to thermoplastic polycarbonate molding compositions which are rendered resistant to gamma-radiation by incorporating therewith about 0.1 to about 10 percent by weight of a stabilizing agent conforming to ##STR1## wherein R.sub.1 denotes a hydrogen atom or a C.sub.1 -C.sub.4 alkyl, R.sub.2 denotes a hydrogen atom, a C.sub.1 -C.sub.30 alkyl or acyl radical, silyl or pyranyl where said alkyl and acyl radicals may be either branched or linear, n is an integer of from 0 to 70, p is 0 or 1 and m is 1 to 4.

Abstract: Fluorosilicone heat cured rubber compositions are prepared using a chain modifier mixture comprising vinyl terminated polysiloxanes and silanol terminated siloxanes which allow vinyl-on-chain-ends functionality to easily crosslink unhindered by perfluoroalkyl groups.

Abstract: The present invention relates to olefin polymers stabilized with polydialkylsiloxanes containing pendant sterically hindered phenol moieties. The compounds are represented by the general formula MD.sub.x D*.sub.y M.sub.A 2 wherein M=R"R.sub.2 SiO.sub.

Abstract: An encapsulating composition for electronic devices comprises a curable material such as a silicone resin and an ion scavenger compound selected from certain calixarene or oxacalixarene compounds in which at least half of the phenolic groups have been substituted by specific groups and certain silacrown compounds. Exemplary ion scavenger compounds include ##STR1## the tetraethyl acetate of 7, 13, 19, 25-tetra-tertbutyl-27, 28, 29, 30-tetrahydroxy-2,3-dihomo-3-oxacalix-4-arene and 1,1-dimethasila-17-crown-6.

Abstract: Flame retardant aromatic polycarbonate blends are provided which are capable of being tested V-O under UL-94 test conditions. A triarylsilicon material such as triphenylsilanol is incorporated into the aromatic polycarbonate to provide transparent, flame retardant compression moldable thermo-plastics capable of satisfying the UL-94 V-O requirement at 1/16".