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:
Apr. 11, 1989
Filed:
Nov. 23, 1984
Applicant:
Inventor:
Tse C Wu, Morristown, NJ (US);
Assignee:
Allied-Signal Inc., Morris Township, NJ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525 62 ; 525 56 ; 5262181 ; 526219 ; 526319 ; 526330 ;
Abstract
This invention relates to a process for the production of poly(vinyl alcohol) having a weight average molecular weight of at least about 0.4.times.10.sup.6 by polymerizing vinyl acetate at a temperature of from about 0.degree. C. to about 40.degree. C. in the presence of an azo free radical polymerization initiator essentially in the absence of ultraviolet radiation to form an essentially linear poly(vinyl acetate) having a weight average molecular weight of at least about 1.0.times.10.sup.6 and thereafter hydrolyzing the poly(vinyl acetate) to form the desired poly(vinyl alcohol).