Patent · US Expired

Amphiphilic graft polymers based on graft bases containing n--vinylcarboxylic acid units, process for their preparation and their use

US6248836A · kind A · utility

1Cited by

2References

11Claims

0Family size

Assignee

BASF SE

Inventors

Anton Negele · Deidesheim, DE
Martin Rubenacker · Altrip, DE
Jens Utecht · Neulußheim, DE
Hubert Meixner · Ludwigshafen, DE

Key dates

Filing date	Jun 10, 1999
Grant date	Jun 19, 2001
Priority date	—
Expiry date	Jun 10, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2103/408
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Amphiphilic graft copolymers are prepared by grafting a pre-formed graft base polymer comprising at least 5% by weight of units of formula (I) ##STR1## where R1 and R2 are independently H or C.sub.1 to C.sub.6 alkyl groups. The monomer grafted to the pre-formed graft base polymer is at least one of styrene or a C.sub.1 to C.sub.2 alkylstyrene, and optionally other monoethylenically unsaturated monomers. At least 5 mole % of the groups ##STR2## are cleaved from the grafted copolymer thus formed.

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