Patent · US Expired

Process for preparing pulverulent polymers by drying aqueous polymer dispersions

US6133345A · kind A · utility

14Cited by

8References

14Claims

0Family size

Assignee

BASF SE

Inventors

Joachim Pakusch · Ludwigshafen, DE
Maximilian Angel · Mutterstadt, DE
Peter Claassen · Ludwigshafen, DE
Andree Dragon · Speyer, DE

Key dates

Filing date	Feb 12, 1998
Grant date	Oct 17, 2000
Priority date	—
Expiry date	Feb 12, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2103/0057
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention provides for a process for preparing pulverulent polymers by drying aqueous polymer dispersions in the presence of copolymers based on ethylenically unsaturated C.sub.3 -C.sub.6 carboxylic acids and their hydroxyalkyl esters as assistants; polymer powders obtainable by this process; aqueous polymer dispersions obtainable by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of the novel copolymers, and the powders obtainable therefrom, and a polymeric binder as well as and mineral building materials which comprise the novel polymer powders.

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