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:
Apr. 23, 1991
Filed:
Jun. 30, 1989
Applicant:
Inventors:
Mannarsamy Balasubramanian, Baton Rouge, LA (US);
Pranab Choudhury, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 14 ; 528 10 ; 528 31 ; 528 38 ;
Abstract
Organosilazanes having higher prepolymerization molecular weights are prepared by subjecting to elevated temperatures in a dry atmosphere the total reaction mixture resulting from the ammonolysis of an organohalosilane in an organic solvent. Their higher molecular weights expedite the polymerization of the organosilazanes to preceramic polysilazanes.