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:
Jun. 15, 1976
Filed:
Oct. 30, 1974
Applicant:
Inventor:
Nan S Chu, Hartsdale, NY (US);
Assignee:
Union Carbide Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260874 ; 260 / ; 260 / ;
Abstract
A process for producing water swellable poly(alkylene oxide) which comprises introducing into a reaction zone an admixture of poly(alkylene oxide) having a molecular weight of at least 100,000 and an inert hydrocarbon solvent containing a free radical catalyst; adding to said reaction zone acrylic acid, heating said reaction zone at a temperature within the range of about 40.degree.C to about 100.degree.C for a time sufficient to produce said water swellable poly(alkylene oxide), and thereafter recovering said water swellable poly(alkylene oxide) from said reaction zone.