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:
Dec. 30, 2013
Filed:
May. 06, 2012
Qionghua Shen, Latham, NY (US);
Qionghua Shen, Latham, NY (US);
Starfire Systems Inc., Schenectady, NY (US);
Abstract
The invention provides branched copolymers as precursors for preparing silicon carbide (SiC) ceramics represented by the general formulae:[Si(˜)RC(˜)H][SiRRCH],  Formula Type-Iwherein n is the degree of polymerization, 0.1≦x<0.8, 0.2≦y<0.9 and x+y=1; and R=methyl or H, Rand Rare randomly composed of hydrogen (H), allyl, methyl (Me), phenyl (Ph), propargyl or vinyl. Another branched copolymer is represented by the general formula:[Si(˜)RC(˜)H][SiRRCH][SiRRCH]  Formula Type-IIwherein n is the degree of polymerization, 0.1≦x<0.8, 0≦y<0.8, 0.2≦z<0.8 and x+y+z=1; and R=methyl or H, Rand Rare randomly composed of hydrogen (H), methyl (Me) and phenyl; Rand Rare randomly composed of H, allyl, methyl, phenyl (Ph), propargyl, and vinyl. The invention also provides methods for the preparation of such branched copolymers.