Patent · US Expired

Process for the preparation of block copolymers

US6417272B1 · kind B1 · utility

0Cited by
10References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 23, 2000
Grant dateJul 9, 2002
Priority date—
Expiry dateAug 23, 2020

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08F297/044
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A process is disclosed for manufacturing coupled radial block copolymers of the S—B—Li type having improved optical properties, which process utilizes coupling agents having from about 3 to about 7 epoxy groups per mole.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.