US4659850A
Expired / Lapsed
US
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Polyorgano(hydro)silazane and process for producing same
Assignee: EMD Performance Materials Corp
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Filing: 1986-04-09
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Granted: 1987-04-21
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Expires: 2006-04-09
Abstract
Abstract A novel polyorgano(hydro)silazane having the compositional formula: (RSiHNH) x [(RSiH) 1 .5 N] 1-x , wherein R is an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, another group in which the atom directly bound to Si is carbon, an alkylsilyl group, an alkylamino group, or an alkoxy group, and 0.4<x<1. This polyorgano(hydro)silazane is produced by reacting a complex of organo(hydro)diholosilane and a base with dry ammonia. This novel silazane is useful as a ceramic starting material, a polymer hardening agent, a densifying agent, a surface coating material, etc., and can be produced safely and at a low cost.
Inventors
- 👤 Mikiro Arai
- 👤 Takeshi Isoda
- 👤 Osamu Funayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:34
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C08G77/62; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/571; C04B35/58; C04B35/584; C04B35/589; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; C07F7/21
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
66 words
A polyorgano(hydro)silazane represented by the following compositional formula (I): (RSiHNH).sub.x [(RSiH).sub.1.5 N].sub.1-x (I) wherein R may be different and is selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, a group other than these groups in which the atom directly bound to Si is carbon, an alkylsilyl group, an alkylamino group, and an alkoxy group, and 0.4<x<1.
Claim 2
Dependent Claim
66 words
A polyorgano(hydro)silazane represented by the following compositional formula (I): (RSiHNH).sub.x [(RSiH).sub.1.5 N].sub.1-x (I) wherein R may be different and is selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, a group other than these groups in which the atom directly bound to Si is carbon, an alkylsilyl group, an alkylamino group, and an alkoxy group, and 0.4<x<1.
Claim 3
Dependent Claim
54 words
A polyorgano(hydro)silazane according to claim 1, wherein said polyorgano(hydro)silazane has a structure comprising a linear portion as represented by the following formula (II) and a cyclic portion represented by the following formula (III), the ends of the linear portion being bound to the cyclic portions. ##STR7## wherein m and n are an integer, respectively.
Claim 4
Dependent Claim
27 words
A polyorgano(hydro)silazane according to claim 2, wherein said linear portion or said cyclic portion has a branch comprising another linear portion represented by said formula (IV). ##STR8##
Claim 5
Dependent Claim
25 words
A polyorgano(hydro)silazane according to claim 1, wherein the polymerization degree, calculated by (RSiHNH) as the recurring unit, of the polyorgano(hydro)silazane is from 4 to 1700.
Claim 6
Dependent Claim
75 words
A polyorgano(hydro)silazane according to claim 1, wherein the R in said formula (I) may be different and is selected from the group consisting of alkyl groups having 1 to 7 carbon atoms, alkenyl groups having 2 to 7 carbon atoms, cycloalkyl group having 5 to 7 carbon atoms, aryl groups, alkylsilyl groups having 1 to 7 carbon atoms, alkylamino groups having 1 to 7 carbon atoms, and alkoxy groups having 1 to 7 carbon atoms.
Claim 7
Dependent Claim
34 words
A polyorgano(hydro)silazane according to claim 5, wherein the R in said formula (I) may be different and is selected from the group consisting of methyl, ethyle, n-propyl, i-propyl, vinyl, alkyl, benzyl, phenyl and tolyl.
Claim 8
Dependent Claim
94 words
A process for producing a polyorgano(hydro)silazane, comprising the steps of: reacting an organo(hydro)dihalosilane with a base to form a complex thereof, and then reacting the complex with dry ammonia to form a polyorgano(hydro)silazane having the following compositional formula: (RSiHNH).sub.x [(RSiH).sub.1.5 N].sub.1-x wherein R may be different and is selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, a group other than these groups in which the atom directly bound to Si is carbon, an alkylsilyl group, an alkylamino group, and an alkoxy group, and 0.4<x>1.
Claim 9
Dependent Claim
94 words
A process for producing a polyorgano(hydro)silazane, comprising the steps of: reacting an organo(hydro)dihalosilane with a base to form a complex thereof, and then reacting the complex with dry ammonia to form a polyorgano(hydro)silazane having the following compositional formula: (RSiHNH).sub.x [(RSiH).sub.1.5 N].sub.1-x wherein R may be different and is selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, a group other than these groups in which the atom directly bound to Si is carbon, an alkylsilyl group, an alkylamino group, and an alkoxy group, and 0.4<x>1.
Claim 10
Dependent Claim
70 words
A process according to claim 7, wherein said organo(hydro)dihalosilane has a formula (V): ##STR9## wherein R may be different and is selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, a group other than said groups in which the atom bound directly to Si is carbon, an alkylsilyl group, an alkylamino group, and an alkoxy group, and X is a halogen.
Claim 11
Dependent Claim
82 words
A process according to claim 7, wherein the R in said formula (V) may be different and is selected from the group consisting of an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, a cycloalkyl group having 5 to 7 carbon atoms, an aryl group, an alkylsilyl group having 1 to 7 carbon atoms, an alkylamino group having 1 to 7 carbon atoms, and an alkoxy group having 1 to 7 carbon atoms.
Claim 12
Dependent Claim
34 words
A process according to claim 9, wherein the R in said formula (V) may be different and is selected from the group consisting of methyl, ethylene, n-propyl, i-propyl, vinyl, alkyl, benzyl, phenyl and tolyl.
Claim 13
Dependent Claim
13 words
A process according to claim 7, wherein said base is a Lewis base.
Claim 14
Dependent Claim
34 words
A process according to claim 11, wherein said Lewis base is selected from the group consisting of tertiary amines and secondary amines having groups with a steric hindrance, phosphine, stibine, arsine, and their derivatives.
Claim 15
Dependent Claim
24 words
A process according to claim 12, wherein said Lewis base is selected from the group consisting of pyridine, picoline, trimethylphosphine, dimethylethylphosphine, methyldiethylphosphine, and triethylphosphine.
Claim 16
Dependent Claim
20 words
A process according to claim 7, wherein the mole ratio of the base to be organo(hydro)dihalosilane is 0.5 or higher.
Claim 17
Dependent Claim
20 words
A process according to claim 14, wherein said mole ratio of the base to the organo(hydro)dihalosilane is 1.5 or higher.
Claim 18
Dependent Claim
30 words
A process according to claim 7, wherein said reaction of the organo(hydro)dihalosilane with the base to form a complex thereof is conducted in said base alone as a reaction solvent.
Claim 19
Dependent Claim
35 words
A process according to claim 7, wherein said reaction of the organo(hydro)dihalosilane with the base to form a complex is conducted in a mixture of said base and a non-reactive solvent as a reaction solvent.
Claim 20
Dependent Claim
31 words
A process according to claim 17, wherein said non-reactive solvent is selected from the group consisting of aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons and ethers, and a mixture thereof.
Claim 21
Dependent Claim
22 words
A process according to claim 7, wherein the mole ratio of the dry ammonia to the organo(hydro)dihalosilane is from 3.0 to 20.
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