High impact strength polycarbonate resin composition

Claim 2

A thermoplastic molding composition exhibiting excellent room temperature impact strength in the form of high 1/8" notched Izod impact strength, high 1/4" notched Izod impact strength and high double gate impact strength and excellent ductility in comparison with polycarbonate alone consisting essentially of: a. from 80 to 99 parts by weight of a high molecular weight aromatic polycarbonate resin, the aromatic groups of said resin being unsubstituted; and b. from 1 to 20 parts by weight of a thermoplastic hydrogenated AB diblock copolymer wherein A is derived from an alkenyl aromatic compound and B is derived from isoprene or butadiene per 100 parts of the polycarbonate plus the diblock copolymer.

Claim 3

A thermoplastic molding composition as defined in claim 1 wherein the high molecular weight aromatic polycarbonate resin is of the formula: ##STR3## wherein A is a divalent aromatic radical of a dihydric phenol.

Claim 4

A thermoplastic molding composition as defined in claim 2 wherein the aromatic polycarbonate resin is of the formula: ##STR4## wherein R 1 and R 2 are hydrogen, (lower) alkyl or phenyl and n is at least 30.

Claim 5

A thermoplastic molding composition as defined in claim 3 wherein the B block of the copolymer is derived from isoprene.

Claim 6

A thermoplastic molding composition as defined in claim 3 wherein the copolymer is a styreneisoprene block copolymer.

Claim 7

A thermoplastic molding composition as defined in claim 4 wherein the polycarbonate is derived from 2,2-bis(4-hydroxyphenyl)propane.

Claim 8

A thermoplastic molding composition as defined in claim 1 which also includes (c) from 1 to 12% by weight of a multiphase composite interpolymer which comprises a C 1-5 acrylate and a C 1-5 methacrylate per 100 parts of the polycarbonate plus the diblock copolymer.

Claim 9

A thermoplastic molding composition as defined in claim 7 wherein the multiphase composite interpolymer comprises methyl methacrylate and n-butyl acrylate.

Claim 10

A thermoplastic molding composition as defined in claim 1 which also includes a reinforcing amount of a reinforcing filler.

Claim 11

A thermoplastic molding composition as defined in claim 9 wherein the reinforcing filler is filamentous glass.

Claim 12

A thermoplastic molding composition as defined in claim 1 which includes a flame retardant amount of a flame retardant.

Claim 13

A thermoplastic molding composition as defined in claim 9 which includes a flame retardant amount of a flame retardant.

Claim 14

A thermoplastic molding composition as defined in claim 7 wherein said interpolymer (c) comprises a first elastomeric phase polymerized from a monomer system comprising a C 1- C 5 alkyl acrylate, a crosslinking monomer and a graft-linking monomer and a rigid thermoplastic phase comprising C 1- C 5 methacrylate.

Claim 15

A thermoplastic molding composition exhibiting high ductility and high impact resistance, said composition comprising: (a) from about 80.0 to 99.0 parts by weight of a high molecular weight aromatic polycarbonate resin; (b) from about 20.0 to 1.0 parts by weight of a thermoplastic hydrogenated AB diblock copolymer wherein A is derived from an alkenyl aromatic compound and B is derived from isoprene, per 100 parts by weight of the polycarbonate plus the diblock copolymer; and (c) from about 1 to 12 parts by weight per 100 parts by weight of polycarbonate plus diblock copolymer, of a multiphase composite interpolymer which comprises a first elastomeric phase polymerized from a monomer system comprising a C 1 -C 5 alkyl acrylate, a crosslinking monomer and a graft-linking monomer and a rigid thermoplastic phase comprising C 1 -C 5 methacrylate.

Claim 16

A thermoplastic molding composition exhibiting high ductility and high impact resistance, said composition comprising: (a) from about 80.0 to 99.0 parts by weight of a high molecular weight aromatic polycarbonate resin; (b) from about 20.0 to 1.0 parts by weight of a thermoplastic hydrogenated AB diblock copolymer wherein A is derived from an alkenyl aromatic compound and B is derived from isoprene, per 100 parts by weight of the polycarbonate plus the diblock copolymer; and (c) from about 1 to 12 parts by weight per 100 parts by weight of polycarbonate plus diblock copolymer, of a multiphase composite interpolymer which comprises a first elastomeric phase polymerized from a monomer system comprising a C 1 -C 5 alkyl acrylate, a crosslinking monomer and a graft-linking monomer and a rigid thermoplastic phase comprising C 1 -C 5 methacrylate.

Claim 17

A thermoplastic molding composition exhibiting high ductility and high impact resistance, said composition comprising: (a) from about 80.0 to 99.0 parts by weight of a high molecular weight aromatic polycarbonate resin having a number average molecular weight of about 80,000 to more than 200,000 and an intrinsic viscosity (I.V.) of 0.30 to 1.0 dl/g as measured in methylene chloride at 25° C.; (b) from about 20.0 to 1.0 parts by weight of a thermoplastic hydrogenated AB diblock copolymer wherein A is derived from an alkenyl aromatic compound and B is derived from isoprene, per 100 parts of the polycarbonate plus the diblock copolymer; and (c) from about 1 to 12 parts by weight per 100 parts by weight of polycarbonate plus diblock copolymer, of a multiphase composite interpolymer comprising: (i) from about 25 to 95% by weight of a first elastomeric phase polymerized from a monomer system comprising about 75% to 99,8% by weight of a C 1 -C 5 alkyl acrylate, 0.1 to 5% by weight of a crosslinking monomer, said crosslinking monomer, being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups all of which polymerize at substantially the same rate of reaction, and 0.1 to to 5% by weight of a graft-linking monomer, said graft-linking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups, at least one of which polymerizes at a substantially different rate of polymerization from at least one other of said reactive groups; and (ii) from about 75% to 5% by weight of a rigid thermoplastic phase comprising a C 1 -C 5 methacrylate.

Claim 18

A thermoplastic molding composition exhibiting high ductility and high impact resistance, said composition comprising: (a) from about 80.0 to 99.0 parts by weight of a high molecular weight aromatic polycarbonate resin having a number average molecular weight of about 80,000 to more than 200,000 and an intrinsic viscosity (I.V.) of 0.30 to 1.0 dl/g as measured in methylene chloride at 25° C.; (b) from about 20.0 to 1.0 parts by weight of a thermoplastic hydrogenated AB diblock copolymer wherein A is derived from an alkenyl aromatic compound and B is derived from isoprene, per 100 parts of the polycarbonate plus the diblock copolymer; and (c) from about 1 to 12 parts by weight per 100 parts by weight of polycarbonate plus diblock copolymer, of a multiphase composite interpolymer comprising: (i) from about 25 to 95% by weight of a first elastomeric phase polymerized from a monomer system comprising about 75% to 99,8% by weight of a C 1 -C 5 alkyl acrylate, 0.1 to 5% by weight of a crosslinking monomer, said crosslinking monomer, being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups all of which polymerize at substantially the same rate of reaction, and 0.1 to to 5% by weight of a graft-linking monomer, said graft-linking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups, at least one of which polymerizes at a substantially different rate of polymerization from at least one other of said reactive groups; and (ii) from about 75% to 5% by weight of a rigid thermoplastic phase comprising a C 1 -C 5 methacrylate.