Abstract: Copolycarbonates are prepared by ring-opening cyclic polycarbonate oligomers with various nucleophilic polymers. The latter include "living" anionic vinyl polymers; polymers such as polyphenylene ethers or hydroxyaryl-terminated polyimides which contain deprotonated hydroxy or carboxy groups; polymers containing neutral nucleophilic moieties, such as secondary amine-terminated polyimides, polyethersulfones and polyetherketones; and anionic polymers of ring-opened compounds such as cyclic polysiloxanes, lactams and lactones.

Abstract: Fluid compositions capable of crosslinking in ambient humidity to form elastomeric products are disclosed, comprising:(A) an elastomeric aliphatic polycarbonate;(B) an organic compound containing at least two N.dbd.C< groups, selected from bisketimines, bisketiminoenamines and bisketiminosilazanes;(C) a tertiary amine with stress nitrogen bonded to a ketiminic carbon atom, preferably a bicyclic ketimine.

Abstract: The present invention relates to the preparation of thermoplastic poly-(diorganosiloxane)/polycarbonate block copolymers containing monoalkylphenyl or dialkylphenyl end groups by the phase boundary process, and to the block copolymers which can be obtained by the process.

Abstract: A solvent-based thermosetting coating composition comprising a hydroxy functional epoxy ester resin, and polycaprolactone diol, and blocked polyisocyanate crosslinking agent. The coating composition may be formulated as hot sprayable, high solids coating composition suitable for use as chip resistant automotive vehicle primer adapted for use on body panel areas subject to chipping by stones, gravel and other road debris. Alternatively, the composition may be formulated as a high solids composition sprayable with conventional spraying equipment. The resin is formed by reaction of diepoxide chain extended substantially simultaneously with diphenol and dicarboxylic acid and chain terminated with acid component comprising primary hydroxy functional acid.

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

Abstract: Siloxane-carbonate block copolymers are prepared by reacting (A) at least one siloxane compound with (B) at least one polycarbonate compound, one of reagents A and B being anionic and the other being reactive with nucleophiles. The siloxane compound is preferably a linear chlorosilane-terminated polysiloxane, a cyclic polysiloxane or a "living" polysiloxane anion. The polycarbonate composition may be a cyclic polycarbonate oligomer composition, preferably an oligomer mixture, or may be prepared by the reaction of such an oligomer composition with a polycarbonate formation catalyst such as tetramethylammonium tetraphenylborate.

Abstract: The present invention relates to a process for the preparation of polyphenol derivatives, new derivatives obtained by this process and their use in the preparation of polymers and copolymers.This process consists of reacting a polyphenol with 1-allyloxy-2,3-epoxypropane of formula: ##STR1## in the presence of a catalyst constituted by a tertiary amine or an alkali hydroxide to obtain a polyphenol derivative having two reactive functions, i.e. allyl and hydroxyl at each end.Preferably, the phenols used are bisphenol A, bisphenol A derivatives, such as polysulphones or polycarbonates and phenol-formaldehyde resins.The derivatives obtained in this way having two reactive functions of different types at each end of their chain (hydroxyl and allyl) can participate in polymerization, copolymerization and/or crosslinking reactions.

Abstract: The low temperature impact strength of foam thermoplastic articles is increased with the addition of polysiloxane-polycarbonate block copolymer.

Abstract: The present invention relates to thin-walled UV-stabilized polycarbonate mouldings, especially webbed laminate panels and films, made of polydiorganosiloxane/polycarbonate block copolymers.

Abstract: A method of preparing a polar thermoplastic resin having improved resistance to gas permeability is disclosed wherein a blend of the resin and coarse mica flakes having an average particle size of less than about 100 mesh is prepared, the blend being prepared under mixing conditions which impart a shear force to the mica flakes sufficient to delaminate the flakes into individual platelets, substantially increasing the original aspect ratio of the flakes whereby an increase in the gas barrier properties of the resin is attained greater than that attained with fine mica flakes having an average particle size greater than about 100 mesh.

Abstract: Blends of carbonate polymer, such as a polycarbonate of bisphenol-A, and a rubber-modified copolymer, such as an acrylonitrile/butadiene/styrene (ABS) resin prepared by mass, bulk or mass suspension polymerization techniques, or by agglomerating particles prepared by emulsion polymerization techniques, exhibit good physical properties and a low gloss finish. Such blends are particularly useful in the manufacture of molded parts. Such blends are color stable and exhibit small amounts of yellowing.

Abstract: A melt processable pseudointerpenetrating network of silicones in thermoplastic matrices and a method of producing same is provided by vulcanizing the silicones within the matrices. In a preferred embodiment a two part silicone comprising silicon hydride groups and silicon vinyl-containing groups are reacted in the presence of a platinum complex. Depending on certain parameters chain-extended (thermoplastic) or cross-linked (thermosetting) compositions are produced.

Abstract: Contact lenses are fabricated from a mixture of polymethymethacrylate and polydimethylsiloxane-bisphenol A carbonate block copolymers. The lenses so produced exhibit excellent oxygen permeability.

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

Abstract: A high molecular weight stabilized polymer composition containing p-polyphenylene sulfide and a siloxane.

Abstract: The invention relates to special stable dispersions which crosslink at room temperature upon exposure to moisture in the atmosphere. The dispersions comprise polysiloxanes, vinyl-grafted polysiloxanes and condensation products, e.g. by weight approximately comprisingI. 20-90% of at least one diorganopolysiloxane optionally terminated by OH,II. 5-85% of at least one aliphatic or mixed aliphatic/aromatic polycondensation product or polyaddition product, polyether, or vinyl polymer with a glass temperature T.sub.G of up to 40.degree. C. and/or a vinyl monomer-grafted derivative thereof, andIII. 5-85% of at least one organopolysiloxane modified by grafting with at least one vinyl monomer and comprising(A) 10-90% of a diorganopolysiloxane optionally terminated by OH,(B) 10-90% of polymerized units of at least one vinyl compound, and(C) 0-80% of at least one aliphatic or mixed aliphatic/aromatic polycondensation product or polyaddition product, polyether, or vinyl polymer with a glass temperature T.sub.

Abstract: The invention relates to a fire-resistant synthetic resin composition containing a polycarbonate, more specifically a bisphenol A derivative, a phosphorous fireproofing additive derived from phosphonic acid, and possibly other additives and/or fillers.The fireproofing additive is a Li, Na or K hemiester of a phosphonic acid derived from an aromatic or cycloaliphatic hydrocarbon, or from a polynuclear aromatic compound, and is added at the rate of 0.01 to 0.4 weight % in relation to polycarbonate. This small amount of additive improves the fire-resistant properties of the polycarbonate, without affecting its mechanical properties.

Abstract: A composition comprising (a) an aromatic polycarbonate and (b) a minor amount of a oxyalkylene siloxane block copolymer, and, optionally, an organic phosphite or phosphonite and/or epoxy compound provide lower viscosity in the melt without producing brittle molded parts.

Abstract: An improved hydrolytically stable aromatic polyester-carbonate composition comprising in admixture an aromatic polyester-carbonate resin and a hydrolytically stabilizing amount of at least one stabilizing compound selected from epoxy silanes and epoxy siloxanes.

Abstract: High impact, high modulus thermoplastic molding compositions comprise(a) an aromatic carbonate polymer;(b) a polystyrene resin;(c) a fibrous reinforcing agent essentially free of any sizing agent; and(d) a small amount of a polysiloxane having a substantial content of Si--H bonds.

Abstract: An improved hydrolytically stable aromatic polycarbonate composition comprising in admixture an aromatic polycarbonate resin and a stabilizing amount of at least one stabilizing compound selected from epoxy silanes and epoxy siloxanes.

Abstract: Phenyl-containing organopolysiloxane fluids characterized by the formula, ##STR1## wherein Ph is phenyl, R is hydrogen, trimethylsilyl or mixtures thereof and wherein x and y have a value sufficient to provide a phenyl content of from about 7 weight percent to about 80 weight percent are provided. Also provided are polycarbonate compositions comprising these novel phenyl containing organopolysiloxane fluids.

Abstract: Organopolysiloxane modified organic polymers are prepared by reacting organic polymers containing C-bonded hydroxyl groups with organopolysiloxanes containing Si-bonded hydroxyl groups and/or alkyl groups which are bonded to silicon via oxygen in the presence of water in excess of any formed during the reaction.

Abstract: A thermoplastic resin composition excellent in heat cycle property which comprises 100 parts by weight of a polycarbonate resin blended or not with an ABS type resin in an amount of not more than 95% by weight based on the combined weight of the polycarbonate resin and the ABS type resin and 0.05 to 3.0 parts by weight of an organo-silicon compound.

Abstract: Phenyl containing siloxane fluids are added to transparent thermoplastic polymers to give transparent thermoplastics having improved internal lubrication. For example, PhSi(OMe).sub.3 is equilibrated with (Me.sub.2 SiO).sub.x to give a fluid containing 28 percent by weight phenyl radicals, a PhSiO.sub.3 /2 to Me.sub.2 SiO ratio of 0.72 and an OMe to Si ratio of 0.78. This fluid was added to polystyrene in amount of 1 percent by weight to give a transparent plastic which exhibits no bleed and had excellent surface lubricity.

Abstract: Filled thermoplastic resin compositions are provided wherein the filler component is compatible with and does not deleteriously affect the physical properties of the resin. The filler employed is a particulate, solid sphere which can be pre-treated with a surface active agent prior to being incorporated in the resin. The resin composition can also contain other ingredients such as impact modifiers, glass fillers, and the like.

Abstract: A carbonate resin having the phenolic hydrogen end atoms replaced by stress corrodant preventive groups which are halohydrocarbon groups, halocarbon groups or a silane groups or the hydrogen end atoms replaced by a capping group having fluorescent properties to provide ultraviolet light and stress corrosive protection.

Abstract: Filled polycarbonate compositions are disclosed having improved impact properties and which comprise an admixture of a high molecular weight aromatic polycarbonate, a filler, and an organopolysiloxane-polycarbonate block copolymer additive.

Abstract: A thermal oxidative stabilized polycarbonate composition comprises in admixture (a) a high molecular weight aromatic carbonate polymer and (b) a minor amount of an end-blocked polyorganohydrogen siloxane and, optionally, an organic phosphite or phosphonite and/or epoxy compound.

Abstract: Elastomeric high molecular weight alternating and random block copolymers are disclosed which comprise blocks of a soft carborane-siloxane elastomer and blocks of a high performance rigid polymer. Methods for preparing such block copolymers are also disclosed. These copolymers exhibit the advantages of high temperature elastomers while allowing the use of conventional thermoplastic fabrication techniques.

Abstract: A thermal oxidative stabilized polycarbonate composition comprises in admixture (a) a high molecular weight aromatic carbonate polymer and (b) a minor amount of an oligomeric or polymeric hydrocarbonoxy siloxane and, optionally, an organophosphite or organophosphonite and/or an epoxy compound.