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:
May. 01, 2001
Filed:
Jul. 01, 1999
Applicant:
Inventors:
Jui-Chang Chuang, Wayne, NJ (US);
Michael A. Drzewinski, Long Valley, NJ (US);
Assignee:
ISP Investments Inc., Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J 2/608 ; C08J 2/054 ;
U.S. Cl.
CPC ...
C08J 2/608 ; C08J 2/054 ;
Abstract
A process of making a vinyl caprolactam (VCL)-based polymer which comprises suspension polymerizing the monomers in aqueous medium in the absence of an added protective colloid, wherein polymer formed at an early stage of the polymerization functions as a dispersing agent to maintain polymer particles suspended in water throughout the polymerization.