Patent · US Active

Process for the preparation of aqueous polymer dispersions from a aromatic compound, a conjugated aliphatic diene and an ethylenically unsaturated carbonitrile

US8329803B2 · kind B2 · utility

3Cited by

5References

13Claims

0Family size

Assignee

BASF SE

Inventors

Elitsa Evstatieva · Mannheim, DE
Juergen Schmidt-Thuemmes · Schifferstadt, DE
Dirk Lawrenz · Ludwigshafen am Rhein, DE

Key dates

Filing date	Nov 20, 2009
Grant date	Dec 11, 2012
Priority date	—
Expiry date	Nov 20, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31906
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the preparation of aqueous polymer dispersions is described, a vinylaromatic compound, such as, for example, styrene, a conjugated aliphatic diene, such as, for example, butadiene, and an ethylenically unsaturated carbonitrile, such as, for example, acrylonitrile, being copolymerized in an aqueous medium. The copolymerization is effected in the presence of a degraded starch and of free radical initiators. At least part of the monomers differing from ethylenically unsaturated carbonitriles are polymerized before the ethylenically unsaturated carbonitriles are added to the polymerization mixture.

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