Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of certain sterically hindered secondary amines or their salts.

Abstract: A novel process is disclosed for the preparation of copolyesters containing both carboxylate and carbonate groups. The process comprises reacting a carbonyl halide with a difunctional carboxylic acid and a dihydroxy compound in a reaction media which comprises water and a water immmiscible solvent in the presence of a tertiary amine.

Abstract: A shaped, non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having disposed on the surface thereof a non-opaque primer layer of controlled thickness comprised of a thermoset acrylic polymer and disposed on said primer layer a non-opaque top coat comprised of a colloidal silica filled thermoset organopolysiloxane.

Abstract: An improved process for obtaining halogenated diphenols which can be pure dihalodiphenols or predetermined, statistical mixtures comprising unreacted diphenol, monohalodiphenols and dihalodiphenols.

Abstract: A continuous process for obtaining highly pure, high molecular weight aromatic polycarbonates from highly pure, halogenated diphenols.

Abstract: A method for preparing a resinous condensation product of an allylated phenol and an ethoxyline resin comprising reacting an allylated phenol with an ethoxyline resin in the presence of an acid catalyst and a compound selected from certain ketones and esters.

Abstract: A plasticized polycarbonate composition comprising in admixture a high molecular weight aromatic carbonate polymer and a minor amount of an organic plasticizer, said organic plasticizer being represented by the following general formula: ##STR1## wherein R and R.sub.1 are independently selected from the group consisting of C.sub.1 to C.sub.30 alkyl, aryl of 6 to 14 carbon atoms and substituted aryl wherein the substituents on said substituted aryl are C.sub.1 to C.sub.30 alkyl, halogen, C.sub.1 to C.sub.30 alkoxy, aryloxy of 6 to 14 carbon atoms, alkylthio of 1 to 30 carbon atoms and arylthio of 6 to 14 carbon atoms; R.sub.2 is C.sub.1 to C.sub.30 alkylene, arylene of 6 to 14 carbon atoms, alkarylene of 7 to 30 carbon atoms, aralkylene of 7 to 30 carbon atoms and ##STR2## wherein W is selected from the group consisting of: (a) --O--;(b) --S--; ##STR3## wherein X and Y are independently selected from the group consisting of halogen and C.sub.1 to C.sub.12 alkyl.

Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a compound selected from pyrroles and pyrrole salts.

Abstract: An interfacial polymerization process for preparing high molecular weight polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a sterically hindered heterocycloaliphatic secondary amine or a salt thereof.

Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a cyclic amidine.

Abstract: Novel tetraphenolic compounds are disclosed. These compounds have utility as branching agents in the production of novel, randomly branched polycarbonates.

Abstract: Thermally stable polycarbonate compositions are obtained by admixing with a high molecular weight aromatic polycarbonate resin a stabilizing amount of a hindered phenol phosphite.

Abstract: An improved process for obtaining halogenated diphenols which can be pure dihalodiphenols or predetermined, statistical mixtures comprising unreacted diphenol, monohalodiphenols and dihalodiphenols.

Abstract: A continuous process for obtaining highly pure, high molecular weight aromatic polycarbonates from highly pure, halogenated diphenols.

Abstract: A plasticized polycarbonate composition comprising in admixture a high molecular weight aromatic carbonate polymer and a minor amount of an organic plasticizer.

Abstract: Binary compositions are disclosed which comprise a mixture of a high molecular weight thermoplastic, aromatic polycarbonate and a styrene/butadiene/caprolactone block copolymer.

Abstract: Thermally stable translucent polycarbonate compositions comprising an admixture of an aromatic polycarbonate and a minor amount of a partially fluorinated polyolefin.

Abstract: An improved flame retardant polycarbonate composition of an aromatic carbonate polymer in admixture with an organic alkali metal salt or an organic alkaline earth metal salt which composition has in admixture therewith other organic alkali metal salt or organic alkaline earth metal salt such that the salt mixture contains at least two different cationic components.

Abstract: Ternary compositions are disclosed which comprise a mixture of a high molecular weight thermoplastic, aromatic polycarbonate, a styrene/butadiene/caprolactone block copolymer, and either an acrylate copolymer or an olefin-acrylate copolymer.

Abstract: Thermally stable polycarbonate compositions are obtained by admixing with a high molecular weight aromatic polycarbonate resin a stabilizing amount of a phosphonite oxetane.