US4847345A
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Process for manufacturing organic silazane polymers and ceramics therefrom
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1988-02-23
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Granted: 1989-07-11
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Expires: 2008-02-23
Abstract
Abstract A process for manufacturing an organic silazane polymer which comprises reacting an organic silicon compound of the following formula (I): ##STR1## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R 1 represents hydrogen or methyl radical and X represents chlorine or bromine, or a mixture of organic silicon compounds of the formula (I) above and an organic silicon compound of the following formula (II): ##STR2## in which R 2 and R 3 represent hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine with a disilazane of the following formula (III): ##STR3## in which R 4 , R 5 , R 6 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical in an anhydrous state at a temperature of from 25° to 350° C. while distilling off by-produced organic ingredients out of the system to obtain an organic silazane polymer. The organic silazane polymer is useful for preceramic materials.
Inventors
- 👤 Minoru Takamizawa
- 👤 Yoshihumi Takeda
- 👤 Akira Hayashida
- 👤 Tsutomu Takeno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:28
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/571; C04B35/58; C04B35/584; C04B35/589; C08G77/62
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
159 words
A process for manufacturing an organic silazane polymer which comprises reacting an organic silicon compound of the following formula (I): ##STR11## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R 1 represents hydrogen or methyl radical and X represents chlorine or bromine, or a mixture of an organic silicon compound of the formula (I) above and an organic silicon compound of the following formula (II): ##STR12## in which R 2 and R 3 represent hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine with a disilazane of the following formula (III): ##STR13## in which R 4 , R 5 , R 6 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical in an anhydrous state at a temperature of from 25° to 350° C. while distilling off by-produced organic ingredients out of the system to obtain an organic silazane polymer.
Claim 2
Dependent Claim
159 words
A process for manufacturing an organic silazane polymer which comprises reacting an organic silicon compound of the following formula (I): ##STR11## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R 1 represents hydrogen or methyl radical and X represents chlorine or bromine, or a mixture of an organic silicon compound of the formula (I) above and an organic silicon compound of the following formula (II): ##STR12## in which R 2 and R 3 represent hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine with a disilazane of the following formula (III): ##STR13## in which R 4 , R 5 , R 6 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical in an anhydrous state at a temperature of from 25° to 350° C. while distilling off by-produced organic ingredients out of the system to obtain an organic silazane polymer.
Claim 3
Dependent Claim
34 words
A manufacturing process according to claim 1, wherein the mixing ratio of the organic silicon compounds shown by the above formulae (I) and (II) is in the range of 50-100 mol %:0-50 mol %.
Claim 4
Dependent Claim
19 words
A manufacturing process according to claim 1, wherein the organic silicon compound of the formula (I) is 1,2-bis(chlorodimethylsilyl) ethane.
Claim 5
Dependent Claim
19 words
A manufacturing process according to claim 1, wherein the organic silicon compound of the formula (I) is 1,2-bis(dichloromethylsilyl) ethane.
Claim 6
Dependent Claim
19 words
A manufacturing process according to claim 1, wherein the organic silicon compound of the formula (I) is 1,2-bis(trichlorosilyl) ethane.
Claim 7
Dependent Claim
173 words
A process for manufacturing ceramic material which comprises reacting an organic silicon compound of the following formula (I): ##STR14## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R 1 represents hydrogen or methyl radical and X represents chlorine or bromine, or a mixture of organic silicon compounds of the formula (I) above and an organic silicon compound of the following formula (II): ##STR15## in which R 2 and R 3 represent hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine with a disilazane of the following formula (III): ##STR16## in which R 4 , R 5 , R 6 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical in an anhydrous state at a temperature of from 25° to 350° C. while distilling off by-produced organic ingredients out of the system to obtain an organic silazane polymer, melting, molding and infusibilizing the organic silazane polymer, and sintering the same to obtain a ceramic material.
Claim 8
Dependent Claim
173 words
A process for manufacturing ceramic material which comprises reacting an organic silicon compound of the following formula (I): ##STR14## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R 1 represents hydrogen or methyl radical and X represents chlorine or bromine, or a mixture of organic silicon compounds of the formula (I) above and an organic silicon compound of the following formula (II): ##STR15## in which R 2 and R 3 represent hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine with a disilazane of the following formula (III): ##STR16## in which R 4 , R 5 , R 6 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical in an anhydrous state at a temperature of from 25° to 350° C. while distilling off by-produced organic ingredients out of the system to obtain an organic silazane polymer, melting, molding and infusibilizing the organic silazane polymer, and sintering the same to obtain a ceramic material.
Claim 9
Dependent Claim
34 words
A manufacturing process according to claim 6, wherein the mixing ratio of the organic silicon compounds shown by the above formulae (I) and (II) is in the range of 50-100 mol %:0-50 mol %.
Claim 10
Dependent Claim
22 words
A manufacturing process according to claim 6, wherein the organic silazane polymer has a melting point of from 60° to 250° C.
Claim 11
Dependent Claim
30 words
A manufacturing process according to claim 6, wherein the organic silazane polymer is melted, molded and infusibilized in air by heating at a temperature of from 50° to 200° C.
Claim 12
Dependent Claim
39 words
A manufacturing process according to claim 6, wherein the organic silazane polymer is melted, molded and infusibilized in vacuum or in N 2 gas by irradiation of electron beams at an exposed dose of from 10 to 2000 Mrad.
Claim 13
Dependent Claim
26 words
A manufacturing process according to claim 6, wherein the organic silazane polymer is melted, molded and infusibilized in an inert atmosphere by irradiation of ultraviolet beams.
Claim 14
Dependent Claim
23 words
A manufacturing process according to claim 11, wherein a photosensitizer is added to the organic silazane polymer before irradiation of the ultraviolet beams.
Claim 15
Dependent Claim
23 words
A manufacturing process according to claim 11, wherein a vulcanizer is added to the organic silazane polymer before irradiation of the ultraviolet beams.
Claim 16
Dependent Claim
28 words
A manufacturing process according to claim 6, wherein the molding process is a spinning process and the organic silazane polymer is melted and spun to obtain ceramic fibers.
Claim 17
Dependent Claim
17 words
A manufacturing process according to claim 6, wherein the sintering temperature is from 700° to 2000° C.
Claim 18
Dependent Claim
35 words
A manufacturing process according to claim 6, wherein the sintering atmosphere is vacuum or at least one gas selected from the group consisting of inert gases, N 2 , H 2 and NH 3 gases.
Claim 19
Dependent Claim
26 words
A manufacturing process according to claim 6, wherein the organic silazane polymer is added to a powder of inorganic compound as a binding agent and sintered.
Claim 20
Dependent Claim
32 words
A manufacturing process according to claim 17, wherein the powder of inorganic compound is at least one material selected from the group consisting of alumina, silicon carbide, silicon nitride and boron nitride.
Claim 21
Dependent Claim
15 words
An organic silazane polymer produced by the process of anyone of claims 1 through 5.
Claim 22
Dependent Claim
25 words
The organic silazane polymer of claim 19 having a melting point from 60° to 250° C. and a molecular weight of from 800 to 3,000.
Claim 23
Dependent Claim
14 words
A ceramic article formed by the process of anyone of claims 6 through 13.
Claim 24
Dependent Claim
14 words
The ceramic article of claim 21 in the form of a sheet or fiber.
Claim 25
Dependent Claim
32 words
The ceramic article of claim 22 in the form of a fiber having a tensile strength from 230 to 310 kg/mm 2 and a modulus from 16 to 30 tons/mm 2 .
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |