US5276123A
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Alkoxy endblocked polydiorganosiloxane and room temperature vulcanizable silicone elastomers made therefrom
Assignee: Dow Silicones Corp
•
Filing: 1992-09-03
•
Granted: 1994-01-04
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Expires: 2012-09-03
Abstract
Abstract An alkoxy endblocked polydiorgansiloxane of the formula Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z where Z is ##STR1## where Y is R.sub.a (R'O).sub.(3-a) Si--, X is ##STR2## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n≦8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, the bond at ** is attached to the silicon atom Si*, can be used as the base polymer for making one package room temperature vulcanizable silicone elastomer compositions by combining it with alkoxysilane, titanium catalyst and filler. These RTV's cure rapidly and exhibit adhesion to substrates upon which they are cure.
Inventors
- 👤 Russell K. King
- 👤 Chi-Long Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:55
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; C07F7/18; C07F7/1804; C08G77/06; C08G77/08; C08G77/48; C08G77/54; C08K; C08K5/00; C08K5/54; C08K5/549; C08L; C08L83/00; C08L83/04; C08L83/08; C08L83/14; C08L2666/00; C08L2666/28; C08L2666/52
Claims Analysis
Total Claims: 58
Claim 1
Independent Claim
192 words
A polydiorganosiloxane comprising an alkoxy endblocked polydiorganosiloxane of the following general formula Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z where Z is ##STR49## where Y is R.sub.a (R'O).sub.(3-a) Si--, X is ##STR50## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n≧8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, and the bond at ** is attached to the silicon atom Si*, in which at least one Z is of the Group II formula.
Claim 2
Dependent Claim
192 words
A polydiorganosiloxane comprising an alkoxy endblocked polydiorganosiloxane of the following general formula Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z where Z is ##STR49## where Y is R.sub.a (R'O).sub.(3-a) Si--, X is ##STR50## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n≧8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, and the bond at ** is attached to the silicon atom Si*, in which at least one Z is of the Group II formula.
Claim 3
Dependent Claim
13 words
The polydiorganosiloxane in accordance with claim 1 in which R 1 is methyl.
Claim 4
Dependent Claim
18 words
The polydiorganosiloxane in accordance with claim 2 in which n has a value of from 50 to 1,000.
Claim 5
Dependent Claim
63 words
A polydiorganosiloxane mixture comprising a mixture of two types of polydiorganosiloxanes in accordance with claim 2 in which Type 1 is a polydiorganosiloxane in which both Z are Group I and Type 2 is a polydiorganosiloxane in which one Z is Group I and one Z is Group II, and further comprising a Type 3 polydiorganosiloxane in which both Z are Group I.
Claim 6
Dependent Claim
15 words
The polydiorganosiloxane in accordance with claim 2 in which R and R' are methyl radicals.
Claim 7
Dependent Claim
15 words
The polydiorganosiloxane in accordance with claim 3 in which R and R' are methyl radicals.
Claim 8
Dependent Claim
15 words
The polydiorganosiloxane in accordance with claim 4 in which R and R' are methyl radicals.
Claim 9
Dependent Claim
21 words
The polydiorganosiloxane in accordance with claim 2 in which R" is a mixture of --CH 2 CH 2 -- and --CH(Me)--.
Claim 10
Dependent Claim
21 words
The polydiorganosiloxane in accordance with claim 6 in which R" is a mixture of --CH 2 CH 2 -- and --CH(Me)--.
Claim 11
Dependent Claim
21 words
The polydiorganosiloxane in accordance with claim 7 in which R" is a mixture of --CH 2 CH 2 -- and --CH(Me)--.
Claim 12
Dependent Claim
19 words
The polydiorganosiloxane in accordance with claim 2 in which X is ##STR51## a is 0, and p is 3.
Claim 13
Dependent Claim
19 words
The polydiorganosiloxane in accordance with claim 6 in which X is ##STR52## a is 0, and p is 3.
Claim 14
Dependent Claim
19 words
The polydiorganosiloxane in accordance with claim 8 in which X is ##STR53## a is 0, and p is 3.
Claim 15
Dependent Claim
19 words
The polydiorganosiloxane in accordance with claim 9 in which X is ##STR54## a is 0, and p is 3.
Claim 16
Dependent Claim
19 words
The polydiorganosiloxane in accordance with claim 2 in which X is ##STR55## a is 0, and q is 2.
Claim 17
Dependent Claim
19 words
The polydiorganosiloxane in accordance with claim 6 in which X is ##STR56## a is 0, and q is 2.
Claim 18
Dependent Claim
19 words
The polydiorganosiloxane in accordance with claim 8 in which X is ##STR57## a is 0, and q is 2.
Claim 19
Dependent Claim
19 words
The polydiorganosiloxane in accordance with claim 9 in which X is ##STR58## a is 0, and q is 2.
Claim 20
Independent Claim
396 words
A method of preparing alkoxy endblocked polydiorganosiloxanes comprising mixing an azasilacycloalkyl functional alkoxysilane selected from the group consisting of ##STR59## in which G is an azasilacycloalkyl group selected from the group consisting of ##STR60## in which R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, R' is an alkyl radical of from 1 to 3 carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, Me is methyl, a is 0 or 1, d has a value of 1 to 3 inclusive, w is 0 or 1, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, and r has a value of 4 to 6 inclusive with a silanol terminated polydiorganosiloxane of the general formula HO--(SiR.sub.2 O).sub.n SiR.sub.2 OH where each R is a monovalent hydrocarbon radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals and n≧8, and the azasilacycloalkyl functional alkoxysilane reacts with the silanol terminated polydiorganosiloxane producing an alkoxy endblocked polydiorganosiloxane of the following general formula Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z where Z is ##STR61## where Y is R.sub.a (R'O).sub.(3-a) Si--, X is ##STR62## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n≧8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, and the bond at ** is attached to the silicon atom Si*, in which at least one Z is of the Group II formula.
Claim 21
Independent Claim
396 words
A method of preparing alkoxy endblocked polydiorganosiloxanes comprising mixing an azasilacycloalkyl functional alkoxysilane selected from the group consisting of ##STR59## in which G is an azasilacycloalkyl group selected from the group consisting of ##STR60## in which R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, R' is an alkyl radical of from 1 to 3 carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, Me is methyl, a is 0 or 1, d has a value of 1 to 3 inclusive, w is 0 or 1, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, and r has a value of 4 to 6 inclusive with a silanol terminated polydiorganosiloxane of the general formula HO--(SiR.sub.2 O).sub.n SiR.sub.2 OH where each R is a monovalent hydrocarbon radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals and n≧8, and the azasilacycloalkyl functional alkoxysilane reacts with the silanol terminated polydiorganosiloxane producing an alkoxy endblocked polydiorganosiloxane of the following general formula Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z where Z is ##STR61## where Y is R.sub.a (R'O).sub.(3-a) Si--, X is ##STR62## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n≧8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, and the bond at ** is attached to the silicon atom Si*, in which at least one Z is of the Group II formula.
Claim 22
Dependent Claim
12 words
The method according to claim 19 in which R 1 is methyl.
Claim 23
Dependent Claim
17 words
The method according to claim 20 in which n has a value of from 50 to 1,000.
Claim 24
Dependent Claim
19 words
The method according to claim 20 further comprising mixing with the azasilacyclopentyl functional alkoxysilane and silanol terminated polydiorganosiloxane, 1,2,2,4-tetramethyl-1-aza-2-silacyclopentane.
Claim 25
Dependent Claim
14 words
The method according to claim 20 in which R and R' are methyl radicals.
Claim 26
Dependent Claim
14 words
The method according to claim 21 in which R and R' are methyl radicals.
Claim 27
Dependent Claim
20 words
The method according to claim 20 in which R" is a mixture of --CH 2 CH 2 -- and --CH(Me)--.
Claim 28
Dependent Claim
20 words
The method according to claim 24 in which R" is a mixture of --CH 2 CH 2 -- and --CH(Me)--.
Claim 29
Dependent Claim
15 words
The method according to claim 20 in which a is 0 and p is 3.
Claim 30
Dependent Claim
15 words
The method according to claim 24 in which a is 0 and p is 3.
Claim 31
Dependent Claim
15 words
The method according to claim 25 in which a is 0 and p is 3.
Claim 32
Dependent Claim
15 words
The method according to claim 26 in which a is 0 and p is 3.
Claim 33
Dependent Claim
15 words
The method according to claim 20 in which a is 0 and q is 2.
Claim 34
Dependent Claim
15 words
The method according to claim 24 in which a is 0 and q is 2.
Claim 35
Dependent Claim
15 words
The method according to claim 25 in which a is 0 and q is 2.
Claim 36
Dependent Claim
15 words
The method according to claim 26 in which a is 0 and q is 2.
Claim 37
Dependent Claim
235 words
A one package room temperature vulcanizable silicone elastomer comprising a product which is storage stable in the absence of moisture and curable to an elastomeric product when exposed to moisture and obtained by mixing (A) an alkoxy endblocked polydiorganosiloxane of the following general formula Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z where Z is ##STR63## where Y is R.sub.a (R'O).sub.(3-a) Si--, X is ##STR64## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n≧8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, the bond at ** is attached to the silicon atom Si*, and in the alkoxy endblocked polydiorganosiloxane at least one Z is Group II, (B) an alkoxysilane, (C) a titanium catalyst, and (D) a filler.
Claim 38
Dependent Claim
235 words
A one package room temperature vulcanizable silicone elastomer comprising a product which is storage stable in the absence of moisture and curable to an elastomeric product when exposed to moisture and obtained by mixing (A) an alkoxy endblocked polydiorganosiloxane of the following general formula Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z where Z is ##STR63## where Y is R.sub.a (R'O).sub.(3-a) Si--, X is ##STR64## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n≧8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R 1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH 2 ) b -- and --CH(Me)(CH 2 ) c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, the bond at ** is attached to the silicon atom Si*, and in the alkoxy endblocked polydiorganosiloxane at least one Z is Group II, (B) an alkoxysilane, (C) a titanium catalyst, and (D) a filler.
Claim 39
Dependent Claim
19 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 35 in which R 1 is methyl.
Claim 40
Dependent Claim
24 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 36 in which n has a value of from 50 to 1000.
Claim 41
Dependent Claim
21 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 37 in which R and R' are methyl radicals.
Claim 42
Dependent Claim
27 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 36 in which R" is a mixture of --CH 2 CH 2 -- and --CH(Me)--.
Claim 43
Dependent Claim
27 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 38 in which R" is a mixture of --CH 2 CH 2 -- and --CH(Me)--.
Claim 44
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 36 in which X is ##STR65## a is 0, and p is 3.
Claim 45
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 38 in which X is ##STR66## a is 0, and p is 3.
Claim 46
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 39 in which X is ##STR67## a is 0, and p is 3.
Claim 47
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 40 in which X is ##STR68## a is 0, and p is 3.
Claim 48
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 36 in which X is ##STR69## a is 0, and q is 2.
Claim 49
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 38 in which X is ##STR70## a is 0, and q is 2.
Claim 50
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 39 in which X is ##STR71## a is 0, and q is 2.
Claim 51
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 40 in which X is ##STR72## a is 0, and q is 2.
Claim 52
Dependent Claim
44 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 37 in which the alkoxysilane of (B) has a formula R x Si(OR') 4-x where x is 0 or 1, where R and R' have the same meaning as in claim 35.
Claim 53
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 49 in which R and R' are methyl radicals and x is 1.
Claim 54
Dependent Claim
25 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 50 in which the titanium catalyst of (C) is a di-carbonyl titanium compound.
Claim 55
Dependent Claim
21 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 38 in which the alkoxysilane of (B) is methyltrimethoxysilane.
Claim 56
Dependent Claim
21 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 40 in which the alkoxysilane of (B) is methyltrimethoxysilane.
Claim 57
Dependent Claim
21 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 41 in which the alkoxysilane of (B) is methyltrimethoxysilane.
Claim 58
Dependent Claim
21 words
The one package room temperature vulcanizable silicone elastomer in accordance with claim 48 in which the alkoxysilane of (B) is methyltrimethoxysilane.
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