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:
Sep. 15, 1992
Filed:
Apr. 08, 1991
Applicant:
Inventor:
John Biale, Anaheim, CA (US);
Assignee:
Union Oil Company of California, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; B32B / ;
U.S. Cl.
CPC ...
525317 ; 525301 ; 525309 ; 525902 ; 10628727 ; 428514 ; 428522 ;
Abstract
A core/shell polymer is capable of increasing a composition's whiteness or opacity. The core and shell polymers have either a crystalline structure or have a T.sub.g of at least about 50.degree. C. The core polymer has a different composition than the composition of the shell polymer. The core polymer comprises vinylidene halide monomers and/or vinyl halide monomers. The core and shell polymers are either homopolymers or copolymers.