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:
May. 04, 1993
Filed:
Dec. 05, 1989
Leonard M Niebylski, Birmingham, MI (US);
Ethyl Corporation, Richmond, VA (US);
Abstract
Coatings compositions, which are useful as buffer layers between ceramic layers derived from polysilazane-containing compositions and ceramic layers derived from organoborosilazane polymer-containing compositions, are obtained by dissolving (A) a Group IIIa metal hydrocarbyloxide, such as aluminum sec-butoxide, (B) a Group IVb metal hydrocarbyloxide, such as zirconium propoxide, (C) a bis-, tris-, or tetrakis(dialkylamino)metal of Group IVb, such as tetrakis(diethylamino)titanium, (D) a polysilazane and/or a bis-, tris-, or tetrakis(dialkylamino)silane, such as tetrakis(dimethylamino)silane, and (E) optionally also a cyclopentadienyl Group IVb metal halide, such as bis(cyclopentadienyl)zirconium dichloride, in an organic solvent, the amounts of ingredients A-D being such that each constitutes 1-50% of their combined weights, and the amount of ingredient E being such that it constitutes 0-20% of the combined weights of the ingredients.