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. 16, 1991
Filed:
Nov. 27, 1989
Applicant:
Inventor:
Joanne M Schwark, Wilmington, DE (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525474 ; 501 92 ; 528 26 ; 528 28 ;
Abstract
Silazane polymers are prepared by (1) reacting ammonia with one or more halogenated organic silicon compounds containing an Si-H bond to produce a silazane ammonolysis product, (2) mixing the ammonolysis product with 0.1% to 30% by weight of an organic amide or thioamide, and (3) heating to a temperature of 30.degree. to 300.degree. C. Silazane polymers containing alkenyl or alkynyl groups can be cured by supplying energy to generate free radicals. The cured or uncured polymers can be pyrolyzed to produce silicon nitride-containing ceramic materials.