Patent · US Expired

Use of polymers as assistants in the drying of aqueous polymer dispersions

US5962554A · kind A · utility

5Cited by

6References

31Claims

0Family size

Assignee

BASF SE

Inventors

Joachim Pakusch · Ludwigshafen, DE
Bernhard Schuler · Austin, US
Walter Machtle · Ludwigshafen, DE
Roland Baumstark · Neustadt, DE

Key dates

Filing date	Oct 18, 1996
Grant date	Oct 5, 1999
Priority date	—
Expiry date	Oct 18, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L41/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polymers composed of at least >80% by weight of monomers of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each C.sub.1 -C.sub.3 -alkyl, R.sup.4 is C.sub.1 -C.sub.5 -alkyl and X is 0 or NH, are used as assistants in the drying of aqueous polymer dispersions and, in the case of a weight average relative molecular weight of from 5000 to 35,000, additionally as protective colloid for the preparation of aqueous polymer dispersions by the free radical aqueous emulsion polymerization method.

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