Injection moldable polymers containing phthalic anhydride

Claim 2

An injection moldable polyamide copolymer comprising about 1 to about 10 percent phthalic anhydride moieties and comprising recurring polyamide A units of ##STR6## capable of undergoing imidization wherein → denotes isomerization and polyamide B units of ##STR7## wherein the molar ratio of A units to B units is about 80 to 20 to 20 to 80, and wherein R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 --, and --S-- radicals and X is a divalent aromatic radical.

Claim 3

The copolymer of claim 1 wherein the molar ratio of A units to B units is about 1 to 1.

Claim 4

A polyamide molding composition comprising about 1 to about 10 percent phthalic anhydride moieties suitable for injection molding comprising recurring polamide A units of ##STR8## capable of undergoing imidization wherein → denotes isomerization and polyamide B units of ##STR9## wherein the molar ratio of A units to B units is about 80 to 20 to 20 to 80 and the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof and R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to about 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.

Claim 5

A polyamide molding composition comprising about 1 to about 10 percent phthalic anhydride moieties suitable for injection molding comprising recurring polamide A units of ##STR8## capable of undergoing imidization wherein → denotes isomerization and polyamide B units of ##STR9## wherein the molar ratio of A units to B units is about 80 to 20 to 20 to 80 and the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof and R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to about 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.

Claim 6

The composition of claim 3 wherein R is ##STR10## and X is ##STR11##

Claim 7

Shaped article comprising reinforced polyamide copolymer as claimed in claim 3.

Claim 8

The polyamide molding composition of claim 3 wherein the molding composition contains from about 30 to about 60 weight percent of fibers, glass beads or a mixture thereof.

Claim 9

A shaped article comprising reinforced polyamide copolymer as claimed in claim 6.

Claim 10

An injection moldable polyamide copolymer comprising about 1 to about 10 percent phthalic anhydride moieties and comprising recurring polyamide-imide A' units of ##STR12## and polyamide B units of ##STR13## wherein the molar ratio of A' units to B units is about 80 to 20 to 20 to 80, and wherein R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.

Claim 11

An injection moldable polyamide copolymer comprising about 1 to about 10 percent phthalic anhydride moieties and comprising recurring polyamide-imide A' units of ##STR12## and polyamide B units of ##STR13## wherein the molar ratio of A' units to B units is about 80 to 20 to 20 to 80, and wherein R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.

Claim 12

The composition of claim 8 wherein the molar ratio of A and A' to B units is about 1 to 1.

Claim 13

A polyamide-imide molding composition comprising about 1 to about 10 percent by weight of phthalic anhydride moieties suitable for injection molding and forming shaped articles comprising recurring A' units of ##STR14## and polyamide B units of ##STR15## wherein the molar ratio of A' units to B units is about 80 to 20 to 20 to 80, and the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof and R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.

Claim 14

A polyamide-imide molding composition comprising about 1 to about 10 percent by weight of phthalic anhydride moieties suitable for injection molding and forming shaped articles comprising recurring A' units of ##STR14## and polyamide B units of ##STR15## wherein the molar ratio of A' units to B units is about 80 to 20 to 20 to 80, and the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof and R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.

Claim 15

The composition of claim 10 wherein the molding composition contains from about 30 to about 50 weight percent of glass fibers, glass beads or a mixture thereof.

Claim 16

The composition of claim 10 wherein R is ##STR16## and X is ##STR17##

Claim 17

A shaped article comprising reinforced polyamide copolymer as claimed in claim 10.

Claim 18

A molding composition suitable for injection molding comprising about 1 to about 10 percent phthalic anhydride and at least about 70 weight percent of a polymer prepared by polymerizing the 4 acyl chloride derivative of trimellitic acid anhydride, the acyl chloride derivative of isophthalic acid and meta-phenylene diamine, and wherein the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof.

Claim 19

A molding composition suitable for injection molding comprising about 1 to about 10 percent phthalic anhydride and at least about 70 weight percent of a polymer prepared by polymerizing the 4 acyl chloride derivative of trimellitic acid anhydride, the acyl chloride derivative of isophthalic acid and meta-phenylene diamine, and wherein the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof.

Claim 20

Shaped article comprising reinforced polymer as claimed in claim 14.

Claim 21

A process for improving the flow properties of polyamide copolymer comprising about 1 to about 10 percent phthalic anhydride moieties, and comprising recurring polyamide A units of ##STR18## capable of undergoing imidization wherein → denotes isomerization, and polyamide B units of ##STR19## wherein the molar ratio of A units to B units is about 80 to 20 to about 20 to 80, and wherein R is a divalent aromatic hydrocarbon radical of from about 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to about 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals, and X is a divalent aromatic radical.

Claim 22

A process for improving the flow properties of polyamide copolymer comprising about 1 to about 10 percent phthalic anhydride moieties, and comprising recurring polyamide A units of ##STR18## capable of undergoing imidization wherein → denotes isomerization, and polyamide B units of ##STR19## wherein the molar ratio of A units to B units is about 80 to 20 to about 20 to 80, and wherein R is a divalent aromatic hydrocarbon radical of from about 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to about 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals, and X is a divalent aromatic radical.

Claim 23

The process of claim 16, wherein the anhydride halide is 4-trimellitoyl anhydride chloride and the acid halide is isophthaloyl dichloride.

Claim 24

The process of claim 16, wherein a nitrogen containing organic polar solvent is employed.

Claim 25

The process of claim 17, wherein a nitrogen containing organic polar solvent is employed.