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. 25, 1992
Filed:
Jul. 30, 1991
Applicant:
Inventors:
Hans-Joachim Holle, Rodenbach, DE;
Peter Reinhard, Kleinostheim, DE;
Assignee:
Degussa AG, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526193 ; 526233 ; 5263184 ; 526325 ;
Abstract
In the suspension polymerization of (meth)acrylic acid esters or of vinyl aromatics or of mixtures of such monomers, the formation of undesired, very fine 'emulsion polymer', which reduces the yield, is reduced if the polymerization is carried out in the presence of polyvalent phosphonic acids or their alkali metal salts or ammonium salts or of alkali metal salts or ammonium salts of condensed inorganic phosphates, e.g. of Graham's salt.