Patent · US Expired

Multistage process for preparing an aqueous dispersion of polymer particles having a soft core and hard shell

US6262144A · kind A · utility

26Cited by

0References

26Claims

0Family size

Assignee

BASF SE

Inventors

Cheng-Le Zhao · Charlotte, US
Joachim Roser · Dessel, BE
Eckehardt Wistuba · Bad Dürkheim, DE
Bernhard Schuler · Austin, US
Klemens Mathauer · Ludwigshafen, DE

Key dates

Filing date	Dec 1, 2000
Grant date	Jul 17, 2001
Priority date	—
Expiry date	Dec 1, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/902
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for preparing aqueous polymer dispersions comprises first of all subjecting ethylenically unsaturated monomers to free-radical aqueous emulsion polymerization to prepare an aqueous dispersion of a polymer 1 having a glass transition temperature Tg.sup.1, then dissolving further, comparatively hard monomers in the dispersed particles of the polymer 1, and subsequently carrying out free-radical polymerization of the monomers dissolved in the particles.

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