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:
Oct. 02, 1984
Filed:
Apr. 05, 1982
Applicant:
Inventors:
Elsa S Polatajko-Lobos, Sarnia, CA;
Zbigniew J Lobos, Sarnia, CA;
Assignee:
Polysar Limited, Sarnia, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ; C08K / ;
U.S. Cl.
CPC ...
524377 ; 252407 ; 427391 ;
Abstract
The upward drift in viscosity which is characteristic of paper coating compositions prepared from alkali-swellable latices to which alkali has been added can be arrested at any desired level by including in the coating composition 0.1-10 parts by weight, per 100 parts by weight of dry solids in the uncompounded alkali-swellable latex, of a poly- C.sub.2-4 alkylene glycol having an average molecular weight of about 100-5,000. Polyethylene and polypropylene glycols having molecular weights of about 1,200 are shown to produce excellent results with latices of carboxylic copolymers of butadiene and styrene.