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US5155181A
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(Thio)amide-modified silazane polymer composition containing a free radical generator
Assignee: Kion Corp
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Filing: 1991-05-14
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Granted: 1992-10-13
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Expires: 2011-05-14
Abstract
Abstract A composition that comprises a (thio)amide-modified silazane polymer containing at least one alkenyl or alkynyl group and a free radical generator can be crosslinked by an energy input provided in the form of heat, ultraviolet radiation, or an electron beam. The crosslinked (thio)amide-modified silazane polymer composition can be pyrolyzed to form a silicon nitride-containing ceramic.
Inventors
- 👤 Joanne M. Schwark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/589; C08; C08G; C08G77/00; C08G77/60; C08G77/62
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
49 words
A (thio)amide-modified silazane polymer composition that is capable of being crosslinked by an energy input comprising (a) a (thio)amide-modified silazane polymer having at least one 2-6 carbon alkenyl or alkynyl group, and (b) at least one free radical generator in an amount effective to crosslink the (thio)amide-modified silazane polymer.
Claim 2
Dependent Claim
49 words
A (thio)amide-modified silazane polymer composition that is capable of being crosslinked by an energy input comprising (a) a (thio)amide-modified silazane polymer having at least one 2-6 carbon alkenyl or alkynyl group, and (b) at least one free radical generator in an amount effective to crosslink the (thio)amide-modified silazane polymer.
Claim 3
Dependent Claim
14 words
The composition according to claim 1, wherein the alkenyl group is a vinyl group.
Claim 4
Dependent Claim
15 words
The composition according to claim 1, wherein the free radical generator is an azo compound.
Claim 5
Dependent Claim
12 words
The composition according to claim 3, wherein the azo compound is 2,2'-azobis(2-methylpropionitrile).
Claim 6
Dependent Claim
14 words
The composition according to claim 1, wherein the free radical generator is a peroxide.
Claim 7
Dependent Claim
12 words
The composition according to claim 5, wherein the peroxide is dicumyl peroxide.
Claim 8
Dependent Claim
10 words
The composition according to claim 1 further comprising a filler.
Claim 9
Dependent Claim
26 words
The composition of claim 1, wherein the free radical generator is present in an amount of 0.01 to 5.0 wt. % of the (thio)amide-modified silazane polymer.
Claim 10
Dependent Claim
49 words
A process for crosslinking a (thio)amide-modified silazane polymer composition comprising a (thio)amide-modified silazane polymer and a free radical generator, said process comprising the step of exposing the (thio)amide-modified silazane polymer composition to an energy input in an amount effective to generate free radicals and crosslink the (thio)amide-modified silazane polymer.
Claim 11
Dependent Claim
49 words
A process for crosslinking a (thio)amide-modified silazane polymer composition comprising a (thio)amide-modified silazane polymer and a free radical generator, said process comprising the step of exposing the (thio)amide-modified silazane polymer composition to an energy input in an amount effective to generate free radicals and crosslink the (thio)amide-modified silazane polymer.
Claim 12
Dependent Claim
28 words
The process according to claim 9, wherein the (thio)amide-modified silazane polymer composition is exposed to an energy input by heating to a temperature of 30° to 300° C.
Claim 13
Dependent Claim
19 words
The process according to claim 10, wherein the composition is heated to a temperature of 100° to 200° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |