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:
Mar. 07, 1978
Filed:
Mar. 08, 1976
Applicant:
Inventors:
Eberhard Tzschoppe, Burgkirchen, Alz, DT;
Jurgen Weinlich, Burgkirchen, Alz, DT;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F26B / ;
U.S. Cl.
CPC ...
34 5 / ; 34 5 / ; 34 60 ;
Abstract
The present invention provides vinyl chloride polymers having a reduced content of residual monomer. They are obtained by treating with steam a product moist with water at a temperature of from 90.degree. to 125.degree. C under a pressure of from 400 to 1,600 mm Hg. The invention also provides an apparatus to carry out the steam treatment of the moist polymer. The treated polymers have a residual vinyl chloride content down to less than 0.001% by weight.