Abstract: A composition comprising a major amount of an aromatic polycarbonate and quantities of both an acrylate elastomeric copolymer with a second order transition temperature, Tg, of less than -10.degree. C. and a phenoxy resin effective to substantially maintain the impact strength and ductility at break after exposing a stressed part to brake fluid comprising alcohols and ethers.

Abstract: A composition comprisinga. a major amount of an aromatic polycarbonate;b. a minor amount of an impact modified comprising(i) an amorphous polyester comprising units derived from 1,4-cyclohexane dimethanol and aromatic dicarboxylic acid or ester forming derivative; and(ii) an olefin acrylate polymeric resin;the components (i) and (ii) in such quantities that said composition has the following properties(a) thick section notched Izod impact resistance better than a,(b) compatibility as measured by Izod impact resistance of a part made from a double gated mold better than that for a+b (i) or a+b (ii); and(c) better resistance against basic organic solution as measured by notched Izod in thin section than a+b (i); and(d) a flexural property and heat strength improving quantity of glass fiber which additionally maintains the ductility of (a) and (b) under notched Izod impact testing before and after aging in a basic organic solution.

Abstract: The compositions of the invention comprise a high molecular weight polycarbonate resin and a hydrogenated AB diblock copolymer wherein A is derived from an alkenyl aromatic compound and B is derived from isoprene. The compositions may also include minor amounts of an acrylic interpolymer.

Abstract: Copolyester-carbonate composition exhibiting improved resistance to organic solvents comprising, in admixture:(i) at least one aromatic copolyester-carbonate resin;(ii) at least one aromatic polycarbonate resin;(iii) at least one selectively hydrogenated block copolymer of a vinyl aromatic compound and an olefinic elastomer; and(iv) at least one polymer selected from an olefin acrylate copolymer, an olefin diene terpolymer, or mixtures thereof. The instant composition also exhibits improved impact properties and relatively high heat resistance.

Abstract: Polycarbonate composition exhibiting improved resistance to organic solvents comprised of, in admixture:(i) at least one high molecular weight thermoplastic aromatic polycarbonate resin;(ii) at least one selectively hydrogenated linear, sequential or radial teleblock copolymer resin of a vinyl aromatic compound (A).sub.n and (A').sub.n and an olefinic elastomer (B), of the A--B--A', A--(B--A--B).sub.n, A(BA).sub.n B, (A).sub.4 B, B(A).sub.4 or B((AB).sub.n B).sub.4 type wherein n is an integer of from 1 to 10; and(iii) at least one olefin-rubbery diene terpolymer; components (ii) and (iii) being present in amounts effective to improve the organic solvent resistance of said composition.The instant composition is useful in the production of extruded sheets and films, and injection or blow molded articles.

Abstract: A modified thermoplastic molding composition having improved compatibility and mold releasability the composition comprising a thermoplastic polyester resin selected from the group consisting of polyethylene terephthalate, poly(1,4-butylene terephthalate), a co-polyester or any combination thereof and from about 0.1 to about 20% by weight based on the total composition of linear low density polyethylene. Optionally, the composition may have added thereto an effective amount of an aromatic polycarbonate for impact strength. The compositions may also contain an effective amount of at least one additive selected from the group consisting of fillers, reinforcing agents, nucleating agents, flow promoters, coloring agents, flame retardants, coupling agents and stabilizers.

Abstract: Thermoplastic molding composition of a polycarbonate and a linear low density polyethylene wherein a C.sub.4 -C.sub.7 alpha-olefin is the comonomer.

Abstract: A resin mixture comprising:(a) an aromatic polycarbonate resin preferably having no more than about 20% of the structural units of the formula ##STR1## wherein R is the same or different and is alkyl of one to four carbon atoms, inclusive and X is C.sub.1 -C.sub.5 alkylene or alkylidene, and(b) a modifier combination therefor comprising(i) a coupled resinous block copolymer having blocks comprising polymerized vinyl aromatic units connected to blocks comprising polymerized diene units; and(ii) a copolymer of an olefin and at least one of a C.sub.1 -C.sub.6 alkyl acrylate, a C.sub.1 -C.sub.6 alkyl methacrylate, acrylic acid, methacrylic acid, or a mixture of any of the foregoing,said modifier being present in said mixture in an amount of at least sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin.

Abstract: Copolyester-carbonate resin containing composition comprising, in physical admixture:(i) at least one aromatic copolyester-carbonate resin;(ii) at least one aromatic polycarbonate resin;(iii) at least one amorphous polyester resin; and(iv) at least one polymer selected from(a) an olefin acrylate copolymer,(b) a polyolefin, and(c) an olefin diene trepolymer.This composition contains amounts of components (ii)-(iv) effective to improve the resistance to mild organic solvents and the impact properties of the copolyester-carbonate resin.

Abstract: Ternary compositions are disclosed which comprise a mixture of a high molecular weight thermoplastic, aromatic polycarbonate, an acrylate copolymer, and an organic, ester-type plasticizer.

Abstract: A composition comprising(a) a major amount of an aromatic polycarbonate;(b) a minor amount of an impact modifier comprising(i) an amorphous polyester comprising units derived from 1,4-cyclohexane dimethanol and aromatic dicarboxylic acid or ester forming derivative thereof and(ii) an olefin-acrylate copolymeric resin, the components b(i) and b(ii) in such quantities that the said composition had the following properties(a) thick section notched Izod impact resistance better than a,(b) double gate Izod impact resistance of a weld line better than a+b(i) and a+b(ii),(c) better resistance against basic organic solution than a+b(i) as measured by notched Izod in thin section.

Abstract: Thermoplastic molding compositions are described which comprise an admixture of (a) an aromatic polycarbonate resin, (b) an olefinic polymer or copolymer and (c) a third component which is a copolymer of an olefin and an acrylate, methacrylate, acrylic acid or methacrylic acid. The presence of the third component enhances impact strength in thicker sections and improves weld line strength.

Abstract: A composition with increased resistance to environmental stress cracking and crazing comprising a blend of (a) an aromatic carbonate polymer resin and (b) an effective amount of a coupled resin block copolymer of polymerized vinyl aromatic units connected to polymerized diene units.

Abstract: Thermoplastic molding compositions are described which comprise a miscible admixture of (a) an aromatic polycarbonate resin, (b) an olefinic polymer or copolymer and a minor amount of (c) a third component which is an acrylic polymer. The presence of the acrylic polymer permits the incorporation of amounts of component (b) in excess of 10 parts by weight per 100 parts by weight of (a) and (b) together to improve the stress cracking resistance without normally attendant loss in ductility.

Abstract: Novel compositions with high resistance environmental stress cracking and crazing comprise:(a) an aromatic carbonate polymer; and(b) a modifier combination therefor comprising:(i) a coupled resinous block copolymer of polymerized vinyl aromatic compound and a polymerized diene;(ii) an olefin-acrylate or methacrylate copolymer; and(iii) a precompounded homogeneous resin composition, compatible under working conditions, comprising an olefinic resin and an elastomeric polyisobutylene resin.

Abstract: Novel compositions with improved resistance to environmental stress cracking and crazing comprising(a) an aromatic carbonate polymer; and(b) a modifier combination therefor comprising(i) a thermoplastic olefin polymer insoluble therein; and(ii) a linear low density polyolefin.

Abstract: This application discloses novel thermoplastic polycarbonate molding compositions which include a multiphase composite interpolymer; a copolymer of acrylonitrile, butadiene and an alkenyl aromatic compound; and an olefin-acrylate copolymer.

Abstract: Novel compositions with high resistance to environmental stress cracking and crazing comprise:(a) an aromatic carbonate polymer; and(b) a modifer combination therefor comprising:(i) a selectively hydrogenated linear, sequential, or radial teleblock copolymer resin of a vinyl aromatic compound (A).sub.n and (A').sub.n and an olefinic elastomer (B) of of the A--B--A'; A--(B--A--B).sub.n --A; A(BA).sub.n B; (A).sub.4 B; B(A).sub.4 ; or B((AB).sub.n B).sub.4 type, wherein n is an integer from 1 to 10;(ii) an olefin-acrylate or methacrylate copolymer, alone, or in further combination with(iii) a polyolefin.

Abstract: A process for the manufacture of a crystallized polycarbonate resin prepared via the transesterification of a diaryl carbonate and a dihydric phenol comprising adding to the polycarbonate resin a minor amount of a lithium compound nucleating agent.

Abstract: Novel thermoplastic molding compositions that are stabilized against hydrolytic degradation comprising an aromatic polyester-carbonate resin and a linear low density polyolefin resin having a density of about 0.89 to 0.96 gm/cc.