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:
Nov. 07, 1978
Filed:
Oct. 20, 1977
Applicant:
Inventor:
Philippe J Camerman, Wezembeek-Oppem, BE;
Assignee:
Cosden Technology, Inc., Big Spring, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
2608 / ; 526346 ; 528487 ; 528492 ;
Abstract
A process for removing residual monomer from styrene based polymers is disclosed which comprises adding a sulfonylhydrazide having the general formula: ##STR1## where: R.sub.1 is H or an alkyl radical containing 1 to 4 carbon atoms; R.sub.2 is H or a --SO.sub.2 --NH--NH.sub.2, in which case R.sub.1 is H; and symmetric sulfonylhydrazides of the general formulae: ##STR2## where: X is --O--, --S--, --CH.sub.2 -- or --SO.sub.2 -- and mixtures thereof to the polymer resin. Products made by adding the hydrazides to the resins are also disclosed.