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US 2004/0019230 A1Published application
Silicon-boron-carbon-nitrogen ceramics and precursor compounds, methods for the production and use thereof
AssigneeMax-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.
InventorsMatthias L. Kroschel, Martin Jansen
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Abstract
The present invention relates to novel processes for preparing borylsilylamines, novel amines, novel borosilazane compounds, novel oligoborosilazane or polyborosilazane compounds which have the structural feature Si—N—B, ceramic material and methods of producing and using them.
Claims28
A process for preparing a compound of the formula (I)
- RxHal3−xSi—NR1—BRyHal2−y,
- where Hal are each, independently of one another,
- Cl, Br or I,
- R are each, independently of one another, a hydrocarbon radical having from 1 to 20 carbon atoms or hydrogen,
- R1 is a hydrocarbon radical having from 1 to 20 carbon atoms or hydrogen,
- x is 0, 1 or 2 and
- y is 0 or 1,
- characterized in that an amine component R1NH2 is reacted successively with a silane component SiHal4−xRx and a borane component BHal3−yRy in any order.
5 more elements
The process as claimed in any of the preceding claims, characterized in that dehydrohalogenation steps are aided by an auxiliary base.
A borylsilylamine of the formula (I)
- RxHal3−xSi—NR1BRyHal2−y,
- where Hal are each, independently of one another,
- Cl, Br or I,
- R are each, independently of one another, a hydrocarbon radical having from 1 to 20 carbon atoms or hydrogen,
- R1 is a hydrocarbon radical having from 1 to 20 carbon atoms or hydrogen,
- x is 0, 1 or 2 and
- y is 0 or 1,
- with the proviso that the borylsilylamine is not trichlorosilylaminodichloroborane, Cl3Si—NH—BCl2, or chlorodimethylsilylmethylaminodichloroborane, (CH3)2ClSi—N (CH3)—BCl2.
5 more elements
A borosilazane compound of the formula (II)
- (R′R″N)qRxHal3−x-qSi—N (R1)—BRyHal2−y-z(NR′R″)z,
- where R′, R″, R and R1 are each, independently of one another, a hydrocarbon radical having from 1 to 20 carbon atoms or hydrogen,
- Hal is Cl, Br or I,
- q is 0, 1, 2 or 3,
- x is 0, 1 or 2,
- y is 0 or 1
- z is 0, 1 or 2 and
- x+q≦3 and y+z≦2,
- with the proviso that the compound is not tris(dimethylamino)silylaminobis(dimethylamino)-borane ((CH3)2N)3Si—NH—B(N(CH3)2)2.
6 more elements
Dependencies are inferred from the claim text.