US4180642A
Expired / Lapsed
US
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Room temperature curable organopolysiloxane compositions
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1978-06-21
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Granted: 1979-12-25
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Expires: 1998-06-21
Abstract
Abstract Novel room temperature curable organopolysiloxane compositions which are stable as ready mixed for a long period of time when kept in an air-tight container and readily curable at room temperature to form rubber-like elastomers when exposed to the moisture-containing air. The composition comprises a diorganopolysiloxane terminated at both chain ends with hydroxy groups, an organosilane having in a molecule 3 or 4 substituted or unsubstituted vinyloxy groups or a partial hydrolysis-condensation product thereof, and an organosilane or an organopolysiloxane having in a molecule at least one monovalent group expressed by the general formula of the type (R2N)2C=N-, where R is a hydrogen atom or a monovalent hydrocarbon group. The compositions are free from toxicity and offensive odor as well as corrosiveness against various substrate surfaces, especially of metals.
Inventors
- 👤 Toshio Takago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08L; C08L83/00; C08L83/04; C08L83/08; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/18; C08G77/22; C08G77/26; Y; Y10; Y10S; Y10S528/00; Y10S528/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31786
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
174 words
A room temperature curable organopolysiloxane composition which comprises (a) 100 parts by weight of a diorganopolysiloxane terminated at both chain ends with hydroxy groups, represented by the general formula HO--(R 2 Si--O) n H where R is a monovalent hydrocarbon group and n is a positive integer, (b) from 1 to 25 parts by weight of a vinyloxy-containing silane represented by the general formula ##STR15## where R 1 is a substituted or unsubstituted monovalent hydrocarbon group, R 2 and R 3 are each a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group and m is 3 or 4, or a partial hydrolysis-condensation product, and (c) from 0.01 to 10 parts by weight of an organosilane or an organopolysiloxane having in a molecule at least one monovalent group represented by the general formula ##STR16## where R 4 , R 5 , R 6 and R 7 are each a hydrogen atom or a monovalent hydrocarbon group and the group represented by formula II is bonded to the silicon atom by a divalent group.
Claim 2
Dependent Claim
174 words
A room temperature curable organopolysiloxane composition which comprises (a) 100 parts by weight of a diorganopolysiloxane terminated at both chain ends with hydroxy groups, represented by the general formula HO--(R 2 Si--O) n H where R is a monovalent hydrocarbon group and n is a positive integer, (b) from 1 to 25 parts by weight of a vinyloxy-containing silane represented by the general formula ##STR15## where R 1 is a substituted or unsubstituted monovalent hydrocarbon group, R 2 and R 3 are each a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group and m is 3 or 4, or a partial hydrolysis-condensation product, and (c) from 0.01 to 10 parts by weight of an organosilane or an organopolysiloxane having in a molecule at least one monovalent group represented by the general formula ##STR16## where R 4 , R 5 , R 6 and R 7 are each a hydrogen atom or a monovalent hydrocarbon group and the group represented by formula II is bonded to the silicon atom by a divalent group.
Claim 3
Dependent Claim
22 words
The composition as claimed in claim 1 wherein the component (a) has a viscosity of at least 25 centistokes at 25° C.
Claim 4
Dependent Claim
22 words
The composition as claimed in claim 1 wherein the component (a) has a viscosity of at least 1,000 centistokes at 25° C.
Claim 5
Dependent Claim
34 words
The composition as claimed in claim 1 wherein the amount of the component (b) is in the range from 4 to 10 parts by weight per 100 parts by weight of the component (a).
Claim 6
Dependent Claim
89 words
The composition as claimed in claim 1 wherein the component (c) is an organosilane represented by the general formula ##STR17## where m is a positive integer of 2, 3 or 4, a is 0, 1 or 2, R 4 , R 5 , R 6 and R 7 are each the same as defined in claim 1, R 8 is a monovalent hydrocarbon group having 1 to 6 carbon atoms, and R 9 is an alkyl group having 1 to 4 carbon atoms, and a partial hydrolysis-condensation product thereof.
Claim 7
Dependent Claim
41 words
The composition as claimed in claim 5 wherein R 4 , R 5 , R 6 , R 7 , R 8 , and R 9 each represents a methyl group, m is 3 and a is 0, 1 or 2.
Claim 8
Dependent Claim
34 words
The composition as claimed in claim 1 wherein the amount of the component (c) is in the range from 0.1 to 1.0 part by weight per 100 parts by weight of the component (a).
Claim 9
Dependent Claim
21 words
The composition as claimed in claim 1 wherein R 2 is a hydrogen atom and R 3 is a methyl group.
Claim 10
Dependent Claim
13 words
The composition of claim 1 wherein the divalent group is alkylene or oxyalkylene.
References Cited (Backward Citations)
US3819563A
Cited
US4020044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |