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:
Jul. 10, 1984
Filed:
Dec. 14, 1982
Applicant:
Inventor:
Raban Grundmann, Marl, DE;
Assignee:
Chemische Werke Huels Aktiengesellschaft, Marl, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525157 ; 525158 ; 525164 ; 525206 ; 525233 ; 5253291 ; 5253292 ; 525340 ;
Abstract
For the production of acrylonitrile polymers containing phosphonic acid groups and having phosphorus contents of 1-17% by weight, homo- or copolymers of acrylonitrile having molecular weights of 1,000-200,000 are reacted at temperatures of 120.degree.-220.degree. C. with 0.2-8 moles of phosphorous acid per mole of nitrile group. Preferably, a melt is prepared from phosphorous acid, and the acrylonitrile polymer is added thereto in metered quantities.