Patent · US Expired

Cured particle incorporating a cured copolymer protective colloid

US5422176A · kind A · utility

7Cited by

5References

7Claims

0Family size

Assignee

BASF SE

Inventors

Bernhard Schuler · Austin, US
Rainer Dyllick-Brenzinger · Speyer, DE
Ralf Biastoch · Speyer, DE

Key dates

Filing date	Oct 6, 1993
Grant date	Jun 6, 1995
Priority date	—
Expiry date	Oct 6, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/249997
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to copolymers containing a) 20-90% of 2-acrylamido-2-methylpropanesulfonic acid, sulfoethyl or sulfopropyl (meth) acrylate or vinylsulfonic acid, b) 0-50% of a vinylic acid, c) 0-70% of methyl or ethyl acrylate or methacrylate, C.sub.2 --C.sub.4 -hydroxyalkyl acrylate or N-vinylpyrrolidone and d) 0.1-10% of styrene or C.sub.4 --C.sub.18 -alkyl acrylate or C.sub.4 --C.sub.18 -alkyl methacrylate. The copolymers according to the invention are particularly suitable as protective colloids for microencapsulation.

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