Abstract: A composition comprising an aromatic polycarbonate branched or crosslinked with a residue of a compound of the formula ##STR1## wherein X, Y, X' and Y' are the same or different and are hydrogen or alkyl of one to about six carbon atoms, inclusive; W, W', Z and Z' are the same or different and are alkyl of one to about six carbon atoms, inclusive, and E is alkylene or alkylidene of two to about twelve carbon atoms, inclusive.

Abstract: Novel bis(cyclic carbonates) are useful as cross-linking agents for polycarbonate compositions (including cyclic polycarbonate oligomers), and, in combination with flame retardant agents, as anti-drip agents for polycarbonate resins. This bis(cyclic carbonates) may be prepared by the reaction of phosgene with novel tetraphenols, which in turn may be prepared by the condensation of aliphatic dialdehydes with phenols.

Abstract: A composition comprising an aromatic copolyester-carbonate having flexural modulus, flexural yield and secondary transition temperature improvement over a corresponding aromatic polycarbonate effective amount of ester units of the structure ##STR1## or mixtures of the above two structures wherein R.sub.1 and R.sub.2 are the same or different and are alkyl of one to six carbon atoms, inclusive, cycloalkyl of four to seven carbon atoms, inclusive, phenyl, one to three alkyl substituted phenyl each alkyl having one to three carbon atoms, inclusive, and R.sub.1 and R.sub.2 taken together with the nitrogen to which they are attached form a ring of four to six carbon atoms, inclusive, or carbazole.

Abstract: Thermoplastic copolyester-carbonate resins are described, having included in their polymer chains, moieties of the formula: ##STR1## wherein R represents alkyl of from about 10 to 36 carbon atoms, inclusive, a and b are each whole number integers of from 0 to 1; and the sum of a+b is 1.The resins are useful as molding compositions and as mold release additives for polycarbonate and copolyester-carbonate molding compositions.

Abstract: A composition comprising an aromatic polycarbonate branched or crosslinked with a residue of a compound of the formula ##STR1## wherein X, Y, X' and Y' are the same or different and are hydrogen or alkyl of one to about six carbon atoms, inclusive; W, W', Z and Z' are the same or different and are alkyl of one to about six carbon atoms, inclusive, and E is alkylene or alkylidene of two to about twelve carbon atoms, inclusive.

Abstract: Carbonate polymer comprised of the reaction products of:(i) at least one dihydric phenol;(ii) a carbonate precursor; and(iii) an optical property improving amount of at least one cyclic anhydride represented by the general formula ##STR1## wherein: X represents a divalent nonaromatic cyclic hydrocarbon radical;R is independently selected from monovalent hydrocarbon radicals; andn is a positive integer having a value of from 0 up to the number of replaceable hydrogen atoms present on X.

Abstract: Flame retardant and drip retardant polycarbonate composition comprised of:(i) at least one aromatic carbonate resin;(ii) a flame retardant amount of at least one flame retardant compound; and(iii) a drip retardant amount of at least one bis cyclic carbonate represented by the general formula ##STR1## wherein X, Y, X' and Y' are the same or different and are hydrogen or alkyl of one to about six carbon atoms, inclusive; W, W', Z and Z' are the same or different and are alkyl of one to about six carbon atoms, inclusive, and E is alkylene or alkylidene of two to about twelve carbon atoms, inclusive.

Abstract: A composition comprising an end-capped aromatic carbonate polymer wherein the end-cap is of the structure ##STR1## wherein R is ##STR2## wherein R.sub.1 and R.sub.2 are the same or different and are alkyl of one to six carbon atoms, inclusive; cycloalkyl of four to seven carbon atoms, inclusive; phenyl; one to three alkyl substituted phenyl each alkyl having one to three carbon atoms, inclusive; and R.sub.1 and R.sub.2 taken together with the nitrogen to which they are attached form a ring of four to six carbon atoms; and wherein R.sub.3 is alkyl of one to ten carbon atoms, inclusive; or cycloalkyl of four to eight carbon atoms, inclusive.

Abstract: A process of molding a polymer admixture with improved compatability which comprises, preparing an admixture of (i) an aromatic carbonate polymer, (ii) a polyolefin or modified polyolefin in sufficient quantity to impact modify the aromatic carbonate polymer, and (iii) an amount of catalyst sufficient to compatibilize (i) and (ii) selected from the group consisting of basic compounds of alkali or alkaline earth metals and molding said admixture.

Abstract: Novel compounds of the metal salts of certain phenol ester sulfonic acids are useful as a flame retardant additive in polycarbonate composition.

Abstract: A composition comprising an admixture of an aromatic polycarbonate and a flame retardant effective amount of a compound of the formula ##STR1## wherein M is an alkali or alkaline earth metal;R is alkyl, halo, nitro, trihalomethyl or cyano;m is an integer of one to about ten;n is an integer of zero, one, two, three or four; andp is an integer of two, three, four, five or six.

Abstract: A polycarbonate composition having improved melt flow and improved impact strength after aging at elevated temperatures, comprising polycarbonate resin with polyolefins and a paraffin derivative. A preferred composition comprises, in admixture, a high molecular weight aromatic carbonate polymer and a minor amount of a polyolefin and pentaerythritol tetrastearate.

Abstract: A composition comprising an admixture ofa. an aromatic carbonate polymer,b. a polyolefin or modified polyolefin in sufficient quantity to impact modify the aromatic carbonate polymer, andc. an amount of catalyst sufficient to compatibilize a and b selected from the group consisting of basic compounds of alkali or alkaline earth metals.

Abstract: Non-Newtonian flow characteristics are achieved by partially end-capping a polycarbonate with a sulfonated compound. The novel polymers are used in blow molding applications.

Abstract: A composition of an aromatic of an aromatic carbon polymer, an acrylate impact modifier and an aliphatic hydrocarbon low temperature impact modifier.

Abstract: An improved flame retardant polyester-carbonate composition comprised of an admixture of (i) an aromatic polyester-carbonate, (ii) an organic alkali metal salt of sulfonic acid or an organic alkaline earth metal salt of sulfonic acid or mixtures thereof, and (iii) a fluorinated polyolefin.

Abstract: A process for preparing an aromatic polycarbonate of controlled molecular weight which comprises interfacially reacting in water and an organic solvent, a dihydric phenol, a carbonate precursor and a molecular weight controlling effective amount of a compound of the formula ##STR1## wherein n is an integer having a value of from 0 to 5 inclusive; Y is a halide or hydroxyl; and each R is independently selected from the group consisting of alkyl radicals, aryl radicals, alkaryl radicals, aralkyl radicals, alkoxy radicals, aryloxy radicals, halides, ##STR2## radicals wherein R.sup.2 is selected from hydrogen, alkyl radicals or acyl radicals or R.sup.3 is an acyl radical or --C.tbd.N. The polymers are useful in injection molded articles.

Abstract: Aromatic polycarbonate resins exhibiting improved heat resistance chain terminated with a residue represented by the general formula ##STR1## wherein: each R is independently selected from monovalent hydrocarbon radicals, substituted monovalent hydrocarbon radicals, or halogen radicals;a represents a whole number having a value of from 1 to 3 inclusive;n represents a whole number having a value of from 0 up to the number of replaceable hydrogen atoms present on the ring carbon atoms of the aromatic nucleus; andeach Z is independently selected from radicals represented by the general formulae ##STR2## wherein R.sup.1 is selected from rigid or bulky monovalent hydrocarbon radicals or rigid or bulky substituted monovalent hydrocarbonradicals. The instant resins may be fabricated into molded articles, films, and sheets.

Abstract: A composition comprising a thermoplastic resin and a mold release effective amount of a vinyl ether.

Abstract: There are provided novel copolyester-carbonate resins exhibiting improved thermal resistance which contain aromatic acyloxy terminal groups.