Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method for converting Si-H containing polysiloxanes to new and useful preceramic polymers and ceramic materials










Image Number 3 for United States Patent #4705837.

A method of forming preceramic polymers using a polysiloxane having repeat units of the formula [RSi(H)O].sub.n (where R is a lower alkyl group having from 1 to about 6 carbon atoms, a cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, n is an integer 1 or greater), by reacting it with a (poly)silylamide is disclosed. Preferably, the poly(silylamide) is a polymeric alkali metal silylamide of the formula [(R.sup.1 SiHNH).sub.a (R.sup.1 SiN).sub.b (R.sup.1 SiHNM).sub.c ].sub.m where a+b+c=1; R.sup.1 is a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having from 2 to about 6 carbon atoms, a substituted or unsubstituted alkenyl group having from 2 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, a tri(lower)alkyl- or di(lower)alkylsilyl group or a di(lower)alkylamino group; M is an alkali metal or one-half equivalent of an alkaline earth metal; and m is an integer greater than 1. Preferably, a weight ratio of polysiloxane:silylamide of 15:1 to 1:15 is used. Novel preceramic polymers formed by this method are also disclosed.








 
 
  Recently Added Patents
Flip-chip mounting resin composition and bump forming resin composition
Boundary acoustic wave device
Process for making thermoplastic polymer pellets
Image forming apparatus and control method therefor
Scanning optical positioning system with spatially triangulating receivers
Storage system comprising multiple microprocessors and method for sharing processing in this storage system
Test method for inspection device, particularly for label seating inspection device
  Randomly Featured Patents
Polymer waveguides and process for producing the same
Test specimen holder
Semiconductor device and method of fabrication thereof
Process for producing phosphonium borate compound, novel phosphonium borate compound, and method of using the same
Multi-cavity, controlled atmosphere tray for packaging and preserving sliced tomatoes
Bottle rack for refrigerated display
Packing ring for ribbed conduits
Methods of operating and manufacturing logic device and semiconductor device including complementary nonvolatile memory device, and reading circuit for the same
High-k dielectric film, method of forming the same and related semiconductor device
Detecting device and method of producing the same