Patent · US Active

Process for continuous emulsion polymerization

US8822572B2 · kind B2 · utility

2Cited by

8References

15Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Jessica Hain · Zangberg, DE
Udo Kotschi · Burghausen, DE
Hans-Peter Weitzel · Reischach, DE

Key dates

Filing date	Jul 7, 2011
Grant date	Sep 2, 2014
Priority date	—
Expiry date	Jul 7, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D131/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for aqueous, free-radically initiated, continuous emulsion polymerization of A) at least one vinyl ester and optionally at least one (meth)acrylic ester, B) ethylene, and C) 0 to 10% by weight of one or more ethylenically unsaturated, functionalized comonomers, in the presence of 3.0 to 12.5% by weight of one or more emulsifiers, where at least 50% by weight are nonionic emulsifiers, and 0 to 10% by weight of one or more protective colloids, in a stirred tank cascade with at least two pressure reactors connected in series and with at least one low-pressure reactor connected downstream.

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