Block copolymer and method of producing the same
US5342895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1993 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Jan 28, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G81/028
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a polyamide/polybutadiene/acrylonitrile block copolymer useful in a wide variety of applications, such as an adhesive film, which comprises a polycondensate comprising a polybutadiene/acrylonitrile copolymer having a carboxyl group at each terminal thereof and a polyamide having an aminoaryl group at each terminal, and which is represented by general formula (I) ##STR1## wherein R is a divalent organic group, Ar is a divalent aromatic group, x, y, z, m and n each: represent mean degree of polymerization and are integers in the ranges of x=3 to 7, y=1 to 4, z=5 to 15, n=1 to 30, and nm=2 to 20, respectively. Also, disclosed is a method of producing the polyamide/polybutadiene based block copolymer by polycondensing an aromatic diamine with an aromatic dicarboxylic acid to form a polyamide having an aminoaryl group at each terminal thereof, and then polycondensing it with a poiybutadiene/acrylonitrile copolymer having a carboxyl group at each terminal thereof, preferably in the presence of an aromatic phosphite and a pyridine derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.