Patent · US Active

Anionic water-in-water polymer dispersion, method for the production thereof and its use

US8476391B2 · kind B2 · utility

0Cited by

10References

20Claims

0Family size

Assignee

Ashland Licensing and Intellectual Property LLC · US

Inventors

Susanne Bellmann · Ratingen, DE
Norbert Steiner · Alzenau, DE
Michael Busch · Greensboro, US
Dev Steuck · Haselau, DE
Johann Schulte · Krefeld, DE
Wolfgang Woebel · Willich, DE

Key dates

Filing date	Mar 7, 2005
Grant date	Jul 2, 2013
Priority date	—
Expiry date	Aug 18, 2028

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/33
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a method for producing anionic water-in-water polymer dispersions containing at least one finely dispersed, water-soluble and/or water-swellable polymer A and a continuous aqueous phase. This phase has a partial quantity of at least one polymeric dispersing agent B in which monomers dispersed in this aqueous phase are subjected to a radical polymerization, and after the polymerization is completed, the reaction mixture is subsequently diluted with the remaining amount of dispersing agent B. The invention also relates to the polymer dispersions obtained according to the method and to their use, particularly in the paper industry.

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