Research/Patents/US 5201947
US 5201947

PRECERAMIC COMPOSITIONS AND CERAMIC PRODUCTS

Assignee

ETHYL CORPORATION

Filed

Sep 29, 1989

Granted

Apr 13, 1993

Location

BIRMINGHAM MI US

Abstract

Preceramic compositions which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by dispersing about 0.4-1 part by weight of a metal boride in an organic solvent solution containing one part by weight of an organoborosilazane polymer prepared by mixing about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with a solution of one part by weight of a polysilazane in an organic solvent.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Dec 7, 1990

Rescinded

May 27, 1992

Duration

1 year, 5 months

Inventor

  • 1LEONARD M. NIEBYLSKI
Back to patent indexSource: USPTO 35 USC §181 secrecy order records