Process for the production of polyester-polyamide block polymers

Details Process for the production of polyester-polyamide block polymers Process for the production of polyester-polyamide block polymers

1989-04-11

1991-01-15

Short, Patricia

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525425, 5282953, C08G 8100

Patent

active

049855085

ABSTRACT:
A process for the production of polyester-polyamide block polymers by precondensing a polyamide-forming starting mixture until a relative viscosity of at least 1.2 is attained, and adding a polyester, the dicarboxylic acid units of which are derived to at least 50% from dicarboxylic acids having at least 17 carbon atoms.

REFERENCES:
patent: 3383343 (1968-05-01), Mohajer
patent: 3464975 (1969-09-01), Duxbury
patent: 3650999 (1972-03-01), Martins
patent: 3849514 (1974-11-01), Gray et al.
patent: 3907733 (1975-09-01), Jackson, Jr. et al.
patent: 4115475 (1978-09-01), Foy
patent: 4145372 (1979-03-01), Murray
patent: 4165303 (1979-08-01), Schlossman

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