Polyester-grafted polyamide, process for preparing the same, and thermoplastic resin composition containing the same
AssigneeDaicel Chemical Industries, Ltd.
InventorsKazushi Watanabe, Katsuhiko Sumida
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Abstract
The polyester-grafted polyamide of the present invention comprises a polyamide as the backbone and a thermoplastic polyester as the graft and has a number-average molecular weight in terms of standard polymethyl methacrylate of 50,000 to 500,000 as determined by gel permeation chromatography using 1,1,1,3,3,3-hexafluoro-2-propanol. The polyester-grafted polyamide is useful as a modifier for polyesters and polyamides.
Claims4
A polyester-grafted polyamide comprising a polyamide as the backbone and a thermoplastic polyester as the graft, said polyester-grafted polyamide having a number-average molecular weight of 50,000 to 500,000 as determined by gel permeation chromatography using polymethyl methacrylate as a standard and using 1,1,1,3,3,3-hexafluoro-2-propanol as an eluent.
A process for preparing a polyester-grafted polyamide which comprises polycondensing at least one member selected from the group consisting of dibasic acids and ring alkylated, halogenated, ester and acid halide derivatives of said dibasic acids with at least one member selected from the group consisting of glycols and dihydric phenols in the presence of a hydroxylated polyamide.
A process for preparing a polyester-grafted polyamide comprising, polymerizing at least one polyester prepolymer represented by the following formula III or IV:
- ##STR8## wherein X stands for a hydrogen atom, a hydrocarbon group or a halogen atom;
- R stands for an alkylene group having 2 to 6 carbon atoms;
- and n is a positive number of 1 to 200,
- in the presence of a hydroxylated polyamide through transesterification.
Dependencies are inferred from the claim text.