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. 11, 1991
Filed:
Nov. 20, 1989
Applicant:
Inventors:
Hugh A Fisher, Baton Rouge, both of, LA (US);
Susan D Landry, Baton Rouge, LA (US);
Troy L Smith, Jr, Kennesaw, GA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 85 ; 521 86 ; 521 88 ; 521 89 ; 521 92 ; 521 93 ; 521134 ; 521189 ; 528399 ;
Abstract
An improved process for producing sulfur-cured polyphosphazene foams is disclosed. The process comprises foaming more than one storable, stable accelerator base composition comprising the sulfur curing agent, a phosphazene oil and a polyphosphazene. A masterbatch of the same or similar polyphosphazene is made by mixing together a hydrated filler, processing aids and phosphazene oil. The matchbatch and accelerator base composition are then blended and foamed and cured.