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:
Feb. 26, 1985
Filed:
Dec. 20, 1983
Applicant:
Inventors:
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08L / ; C08L / ; C08L / ;
U.S. Cl.
CPC ...
527313 ; 527314 ; 527315 ;
Abstract
Anhydride-group- or carboxyl-group-containing graft copolymers of vinyl esters and other suitable monomers on polysaccharide esters of (A) a polysaccharide ester of aliphatic C.sub.1 -C.sub.5 -mono-carboxylic acids as the graft substrate and (B) a grafted-on monomer mixture of (a) a vinyl ester of a C.sub.1 -C.sub.18 -monocarboxylic acid and (b) maleic acid anhydride and/or semiesters of maleic acid and/or fumaric acid with aliphatic C.sub.1 -C.sub.14 -monoalcohols, the ratio by weight of (A) to (B) being from 1:0.1 to 1:2 and the molar ratio of (a) to (b) being from 1:0.5 to 1:3, and a process for producing these graft copolymers.