The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2003
Filed:
May. 15, 2001
Applicant:
Inventors:
Cheng-Le Zhao, Charlotte, NC (US);
Joachim Roser, Brussels, BE;
Eckehardt Wistuba, Bad Duerkheim, DE;
Bernhard Schuler, Mannheim, DE;
Klemens Mathauer, Ludwigshafen, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/24 ; C08F / ; C08F / ; C09D / ; C09J / ;
U.S. Cl.
CPC ...
C08F 2/24 ; C08F / ; C08F / ; C09D / ; C09J / ;
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 , then dissolving further, comparatively hard monomers in the dispersed particles of the polymer 1, and subsequently carrying out free-radical polymerization of said monomers dissolved in said particles.