Abstract: Articles made from a thermoplastic resin composition comprising a high modulus fiber and a resorcinol polyester or resorcinol polyester carbonate resin showing high strength and stiffness along with surprisingly good retention of gloss and color when exposed to weathering.

Abstract: There is provided herein an optical storage media which has low VBR. In a preferred embodiment, there is provided an optical disk comprising a genus of copolycarbonates, including copolyestercarbonates, which have excellent physical and optical properties. Said copolycarbonates have proportions of structural units which fall within a specific composition range, and said range defines certain materials, a large percentage of which can be molded into optical disks having the desired optical properties, including low VBR.

Abstract: An improved method for the preparation of tris(4-hydroxyphenyl) compounds is provided. In particular, an improved method for preparing 1, 1, 1-tris(4'-hydroxyphenyl)ethane is provided which comprises heating a mixture comprising phenol and 4-hydroxy acetophenone in the presence of effective amounts of an ion exchange catalyst and a mercaptan as a copromoter such that the resulting 1, 1, 1-tris(4'-hydroxyphenyl)ethane is substantially free of various reaction impurities.

Abstract: Terpolymers suitable as molding resins are provided having aromatic polyester segments polycarbonate segments and polysiloxane segments of the structure ##STR1## where R.sup.1, R.sup.2, Y and D are as defined herein, and where the weight percentage of polyester and polycarbonate segments is from 50 to 99%, preferably 92 to 96%, and the weight percentage of polysiloxane segments is from 50 to 1%, preferably from 8 to 4%. Also provided is a one-step process to prepare the new terpolymers by reacting together a siloxane, a bisphenol and an aromatic dicarboxylic acid halide.

Abstract: A composition and method is provided for making polycarbonate utilizing an effective amount of a binary catalyst system, comprising a phase transfer catalyst and a tertiary organic amine, as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. for improved phosgene utiliziation.

Abstract: A method is provided for making polycarbonates utilizing an effective amount of a binary phase transfer catalyst, such as tetrabutylammonium bromide and a methyl tertiary amine as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization is achieved.

Abstract: A composition and method is provided for making polycarbonate utilizing an effective amount of a binary catalyst system, comprising a phase transfer catalyst selected from the group consisting of methyltributylammonium halide and hexabutylbutylenediammonium halide and a tertiary organic amine, as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization and the substantial elimination of emulsion formation in the interfacial polymerization reactor and the processing units downstream thereof results.

Abstract: Polycarbonate-polysiloxane block copolymers are prepared by interfacial polymerization technique in the presence or a phase transfer catalyst.

Abstract: A composition and method is provided for making polycarbonate utilizing an effective amount of a binary catalyst system, comprising a phase transfer catalyst and a tertiary organic amine, as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. for improved phosgene utilization.

Abstract: A method is provided for making polycarbonates utilizing an effective amount of a binary phase transfer catalyst, such as tetrabutylammonium bromide and a methyl tertiary amine as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization is achieved.

Abstract: A thermoplastic composition which comprises a siloxane polycarbonate block copolymer wherein the polysiloxane segments of the copolymer are of the formula: ##STR1## where R.sup.1, R.sup.2, Y, D, A, X, A' and E are as defined herein, and high heat polycarbonates containing recurring or repeating polycarbonate units of the formula: ##STR2## wherein Z is --O--, --N(R.sup.3)-- or a mixture thereof and R.sup.3 is selected from hydrogen, hydrocarbyl and halogen-substituted hydrocarbyl.

Abstract: A method is provided for making polycarbonate utilizing an effective amount of a phase transfer catalyst, such as tetrabutylammonium bromide as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization is achieved.

Abstract: Blends of polyester-carbonates and/or polyarylate resins with polyetherimide resins are thermoplastically molded to obtain ductile, high distortion temperature articles. The polyester-carbonate resin or polyarylate resin is selected from a particular class prepared by polymerization of a dihydric phenol, and an ester precursor which is terephthalic acid, optionally with a proportion of isophthalic acid.

Abstract: Novel compositions comprising a high concentration of one or more extended chain homopolymer, copolymer, or block polymer and certain polyphosphoric acids are prepared. Such compositions are optically anisotropic (liquid crystalline), capable of exhibiting excellent cohesive strength, and are especially suited to the production of high molecular weight ordered polymer fibers by dry-jet wet spinning. These liquid crystalline compositions are capable of being drawn through long air gap distances and spun at exceptionally high spin draw ratios. Fibers, films and other articles formed from these liquid crystalline compositions exhibit exceptionally high physical and heat resistant properties.

Abstract: Polycarbonate resins containing repeating or recurring polymer chain units of the formula: ##STR1## wherein R represents alkyl are useful in high temperature applications, when thermoplastically molded into articles.

Abstract: Improved blends of polyetherimide/liquid crystalline polymer are provided. The blends are obtained by melt blending amine terminated polyetherimide resin with liquid crystalline polyester resins and exhibit improved levels of tensile strength compared to blends of phthalic anhydride capped polyetherimide resin with liquid crystalline polyester resin. The blends are useful as molding compositions.

Abstract: An aromatic polyphthalatecarbonate resin having a small percentage of phthalate units therein exhibits improved resistance to hazing and yellowing upon exposure to ultraviolet radiation. The polyphthalate carbonate resin is derived from the reaction products of a phthalate compound, a dihydric phenol and a carbonate precursor.

Abstract: Copolymers are prepared by the interaction of a melt mix comprising a high molecular weight poly(alkylene arylate) resin with a high molecular weight polycarbonate or polyester carbonate and a catalyst, such as diphenyl phosphate. The copolymers are tough and are useful as molding compounds and are capable of maintaining dimensional stability at temperatures approaching their singale glass transition temperature. The copolymers are characterized by having substantially no content of polyester homopolymer and a ratio of arylate linkages to dihydric phenol arylate linkages of not substantially less than 20:1.

Abstract: Compositions containing polyphenylene ether-poly(alkylene dicarboxylate) copolymers are prepared by a reaction between the two polymers and, optionally, at least one functionalizing agent therefor. The functionalizing agent may first be reacted with the polyphenylene ether and the resulting functionalized polyphenylene ether in turn reacted with a functionalized or unfunctionalized poly(alkylene dicarboxylate). Alternatively, an unfunctionalized or hydroxyalkyl-functionalized polyphenylene ether may be incorporated in a conventional polyester-forming reaction. The copolymer-containing compositions are characterized by a number of desirable properties including high impact strength and solvent resistance.

Abstract: Polysulfonecarbonate-siloxane block copolymers provide ductile resins having high heat distortion temperatures and high glass transition temperatures. The polysulfonecarbonate-siloxane block copolymers are useful as molding compounds.