Abstract: A composition comprising an aromatic carbonate polymer end-capped with a group of the structure ##STR1## wherein --+NR.sub.1 R.sub.2 R.sub.3 is meta or para to the O and R.sub.1, R.sub.2 and R.sub.3 are the same or different and are alkyl of one to three carbon atoms; R is alkyl of one to six carbon atoms, perfluoroalkyl of one to eight carbon atoms, inclusive, phenyl or phenyl substituted with one to three substituents. These substituents can be any of the ordinary substituents which are essentially inert to reaction conditions, such as alkyl, cycloalkyl, alkoxy, phenyl, halo, trifluoromethyl and the like. The alkyl or alkyl group of the alkoxy is generally from one to six carbon atoms, inclusive, branched or normal. Generally, electronegative groups such as fluoro, chloro, bromo and trifluoromethyl are preferred.

Abstract: Thermoplastic copolyester-carbonate resins are described, having included in their polymer chains, a moiety of the formula: ##STR1## wherein 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 intermediates for branched or cross-linked molding compositions.

Abstract: A method for the preparation of polycarbonate resins bearing terminal ester groups comprises the interfacial polymerization of a dihydric phenol with a carbonyl halide in the presence of a molecular weight controlling proportion of a compound of the formula: ##STR1## wherein R represents a hydrocarbyl group amenable to beta-elimination upon thermolytic degradation. The product resins are useful as intermediates in the preparation of copolymers with, for example, polyamides.

Abstract: A method for the preparation of polycarbonate resins bearing terminal hydroxy ester groups comprises the interfacial polymerization of a dihydric phenol with a carbonyl halide in the presence of a molecular weight controlling proportion of a compound of the formula: ##STR1## wherein R represents alkylene of 1 to about 12 carbons. The novel product resins are useful as intermediate in the preparation of copolymers with, for example, polyesteramides.

Abstract: Thermoplastic copolyester-carbonate resins are described, having included in their polymer chains, a moiety of the formula: ##STR1## The resins are useful intermediates for branched or cross-linked molding compositions.

Abstract: A composition comprising a cyclic oligomer of the formula ##STR1## wherein X is selected from the group consisting of alkylene of two to twelve carbon atoms, inclusive, alkylidene of one to twelve carbon atoms, inclusive, cycloalkylene of four to twelve carbon atoms, inclusive cycloalkylidene of four to twelve carbon atoms, inclusive, ##STR2## a is zero or 1; n and m are the same or different and are integers of one to about fifteen;R is alkylene of two to eight carbon atoms, inclusive or alkylidene of one to eight carbon atoms, inclusive, phenylene or a single bond.R.sup.1 and R.sup.2 are the same or different and are alkyl or one to four carbon atoms, inclusive or halo;b and c are the same or different and are integers of zero to four; andR.sub.3 and R.sub.4 are the same or different and are alkyl of one to eight carbon atoms, inclusive, phenyl, hydrogen or R.sub.3 and R.sub.4 are taken together to form an alkylene of two to eight carbon atoms inclusive.

Abstract: A composition comprising at least one oligomer of the formula ##STR1## wherein X is selected from the group consisting of alkylene of two to twelve carbon atoms, inclusive, alkylidene of one to twelve carbon atoms, inclusive, cycloalkylene of four to twelve carbon atoms, inclusive, cycloalkylidene of four to twelve carbon atoms, inclusive, ##STR2## a is zero or 1; n is an integer of one to about fifteen;R is alkylene of two to eight carbon atoms, inclusive, or alkylidene of one to eight carbon atoms, inclusive;R.sup.1 and R.sup.2 are the same or different and are alkyl or one to four carbon atoms, inclusive or halo;b and c are the same or different and are an integer of zero to four; andR.sup.3 and R.sup.4 are the same or different and are alkyl of one to eight carbon atoms, inclusive, or phenyl; andd and e are individually integers of 0.1 or 2 with the proviso that d & e is at least one.

Abstract: A composition comprising a cyclic oligomer of the formula ##STR1## wherein X is selected from the group consisting of alkylene of two to twelve carbon atoms, inclusive, alkylidene of one to twelve carbon atoms, inclusive, cycloalkylene of four to twelve carbon atoms, inclusive cycloalkylidene of four to twelve carbon atoms, inclusive, --S--, --O--, --S--S--, ##STR2## a is zero or 1; n and m are the same or different and are integers of one to about fifteen;R is alkylene of two to eight carbon atoms, inclusive or alkylidene of one to eight carbon atoms, inclusive, phenylene or a single bond.R.sub.1 and R.sub.2 are the same or different and are alkyl of one to four carbon atoms, inclusive or halo;b and c are the same or different and are integers of zero to four; andR.sub.3 and R.sub.4 are the same or different and are alkyl of one to eight carbon atoms, inclusive, phenyl, hydrogen or R.sub.3 and R.sub.4 are taken together to form an alkylene of two to eight carbon atoms inclusive.

Abstract: A composition comprising at least one oligomer of the formula ##STR1## wherein X is selected from the group consisting of alkylene of two to twelve carbon atoms, inclusive, alkylidene of one to twelve carbon atoms, inclusive, cycloalkylene of four to twelve carbon atoms, inclusive, cycloalkylidene of four to twelve carbon atoms, inclusive, --S--, --O--, --S--S--, ##STR2## a is zero or 1; n is an integer of one to about fifteen;R is alkylene of two to eight carbon atoms, inclusive, or alkylidene of one to eight carbon atoms, inclusive;R.sup.1 and R.sup.2 are the same or different and are alkyl or one to four carbon atoms, inclusive or halo;b and c are the same or different and are an integer of zero to four; andR.sup.3 and R.sup.4 are the same or different and are alkyl of one to eight carbon atoms, inclusive, or phenyl; andd and e are individually integers of 0, 1 or 2 with the proviso that d+e is at least one.

Abstract: Resinous compositions are prepared by the reaction of a composition comprising cyclic polycarbonate oligomers with at least one polyepoxide compound, in the presence of a polycarbonate formation catalyst. The cyclic polycarbonate oligomer composition is preferably a mixture of oligomers of varying degrees of polymerization, and the polyepoxy compound is preferably triglycidyl isocyanurate or a bis-epoxy-terminated bisphenol A-epichlorohydrin concentrate. There may also be present a polycarbonate crosslinking agent. The product of the reaction is a crosslinked polycarbonate network. The method is particularly useful in reactive processing operations such as reaction injection molding.

Abstract: Cyclic polycarbonate (or thiol analog) oligomer mixtures are prepared by the reaction of bishaloformates or their thio analogs, or mixtures thereof with dihydroxy or dimercapto compounds, with alkali metal hydroxides and various amines. The oligomer mixtures may be converted to polycarbonates or their thiol analogs by a method which is particularly adaptable to integration with polycarbonate processing operations. Polymerization may be conducted simultaneously with molding, extrusion and the like. The oligomer mixtures are adaptable to the preparation of filled prepregs.

Abstract: A method for producing a high molecular weight polycarbonate admixed with carbon materials which comprises(a) adding a polymerizing effective amount of an acidic metallic catalyst system to aromatic cyclic carbonate oligomers admixed with a carbon material, and(b) polymerizing the mixture of carbon material and aromatic cyclic carbonate oligomers to a high molecular weight aromatic polycarbonate.

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: A composition comprising a cyclic oligomer of the formula ##STR1## wherein X is selected from the group consisting of alkylene of two to twelve carbon atoms, inclusive, alkylidene of one to twelve carbon atoms, inclusive, cycloalkylene of four to twelve carbon atoms, inclusive cycloalkylidene of four to twelve carbon atoms, inclusive, --S--, --O--, --S--S--, ##STR2## a is zero or 1; n and m are the same or different and are integers of one to about fifteen;R is alkylene of two to eight carbon atoms, inclusive or alkylidene of one to eight carbon atoms, inclusive, phenylene or a single bond.R.sup.1 and R.sup.2 are the same or different and are alkyl or one to four carbon atoms, inclusive or halo;b and c are the same or different and are integers of zero to four; andR.sub.3 and R.sub.4 are the same or different and are alkyl of one to eight carbon atoms, inclusive, phenyl, hydrogen or R.sub.3 and R.sub.4 are taken together to form an alkylene of two to eight carbon atoms inclusive.

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: A thermoplastic polyester-carbonate resin containing in the polymer chain, divalent moieties of the formula: ##STR1## wherein R represents aliphatic hydrocarbyl of from 1 to 9 carbon atoms, inclusive, halogen substituted aliphatic hydrocarbyl of 1 to 9 carbon atoms, inclusive, aralkyl of 7 to 10 carbon atoms, inclusive and halogen substituted aralkyl of 7 to 10 carbon atoms, inclusive; a and b are each whole number integers of from 0 to 1; and the sum of a+b is 1 and wherein there are sufficient linkages of formula I to lower the glass transition temperature of the polymer.

Abstract: A composition comprising at least one oligomer of the formula ##STR1## wherein X is selected from the group consisting of alkylene of two to twelve carbon atoms, inclusive, alkylidene of one to twelve carbon atoms, inclusive, cycloalkylene of four to twelve carbon atoms, inclusive, cycloalkylidene of four to twelve carbon atoms, inclusive, --S--, --O--, --S--S--, ##STR2## a is zero or 1; n is an integer of one to about fifteen;R is alkylene of two to eight carbon atoms, inclusive, or alkylidene of one to eight carbon atoms, inclusive;R.sup.1 and R.sup.2 are the same or different and are alkyl or one to four carbon atoms, inclusive or halo;b and c are the same or different and are an integer of zero to four; andR.sup.3 and R.sup.4 are the same or different and are alkyl of one to eight carbon atoms, inclusive, or phenyl; andd and e are individually integers of 0, 1 or 2 with the proviso that d+e is at least one.

Abstract: A process for separating solid cyclic oligomeric dihydric phenol carbonate from solid high molecular weight linear aromatic polycarbonate which comprises admixing an organic solvent with a composition comprising major quantities of solid high molecular weight linear aromatic polycarbonate and minor quantities of solid cyclic oligomeric dihydric phenol carbonate and separating the cyclic oligomeric dihydric phenol carbonate soluble in the organic solvent from the high molecular weight linear aromatic polycarbonate insoluble in the organic solvent, said organic solvent selected so that a very large fraction of the said solid cyclic oligomer is separated from a very large fraction of the said polycarbonate which remains as a solid in the organic solvent.

Abstract: A composition comprising an aromatic copolyestercarbonate 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: Chloroformate compositions, particularly bischloroformate compositions, are prepared by the reaction of phosgene with a hydroxy compound, preferably a dihydroxy compound such as bisphenol A, in a heterogeneous mixture, while adding a hydrogen chloride scavenger comprising aqueous base as necessary and maintaining a pH of 0.5-8 during the phosgene addition. When a polyhydroxy compound is employed and the temperature is above 30.degree. C., the phosgene addition rate is maintained at a level high enough to effect rapid and complete reaction with dissolved hydroxy compound. This method uses substantially less phosgene than methods involving a higher pH.