Boron-containing organosilane polymers and ceramic materials the

Details Boron-containing organosilane polymers and ceramic materials the Boron-containing organosilane polymers and ceramic materials the

1988-08-11

1989-07-25

Dixon, Jr., William R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From boron reactant having at least one boron to hydrogen or...

528 10, 528 30, 556402, 501 88, 501 91, 501 92, 501 96, C08G 7908, C08G 7700, C04B 3552

Patent

active

048514918

ABSTRACT:
The present invention relates to a polyorganoborosilane ceramic precursor polymer comprising a plurality of repeating units of the formula: ##STR1## with the segments being linked together by second units of the formula: --[(R.sup.2)--Si--R.sup.3)--q, where R.sup.1 is lower alkyl, cycloalkyl, phenyl, or ##STR2## and R.sup.2 and R.sup.3 are each independently selected from hydrogen, lower alkyl, vinyl, cycloalkyl, or aryl, n is an integer between 1 and 100; p is an integer between 1 and 100; and q is an integer between 1 and 100. These materials are prepared by combining an organoborohalide of the formula R.sup.4 --B--(X.sup.1).sub.2 where R.sup.4 is selected from halogen, lower alkyl, cycloalkyl, or aryl, and an organohalosilane of the formula: R.sup.2 (R.sup.3) Si(X.sup.2).sub.2 where R.sup.2 and R.sup.3 are each independently selected from lower alkyl, cycloalkyl, or aryl, and X.sup.1 and X.sup.2 are each independently selected from halogen, in an anhydrous aprotic solvent having a boiling point at ambient pressure of not greater than 160.degree. C. with in excess of four equivalents of an alkali metal, heating the reaction mixture and recovering the polyorganoborosilane. These silicon boron polymers are useful to generate high-temperature ceramic materials, such as SiC, SiB.sub.4, and B.sub.4 C, upon thermal degradation above 600.degree. C.

REFERENCES:
patent: 3154520 (1964-10-01), Dupont et al.
patent: 4482669 (1984-11-01), Seyferth et al.
patent: 4550151 (1985-10-01), Takamizawa et al.
patent: 4604367 (1986-08-01), Takamizawa et al.
patent: 4761458 (1988-08-01), Burns et al.
patent: 4767728 (1988-08-01), Riccitiello et al.
patent: 4783516 (1988-11-01), Schilling, Jr. et al.

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