US4695603A
Expired / Lapsed
US
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Room temperature curable silicone rubber composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1985-05-30
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Granted: 1987-09-22
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Expires: 2005-05-30
Abstract
Abstract The room temperature curable silicone rubber composition of the invention is outstandingly free from the problem of surface stain when a cured elastomer thereof used, for example, in building works is prolongedly exposed to the atmosphere with very durable stain-preventing effect by the formulation of a surface active agent having at least one fluorine atom in a molecule and a specific organosilicon compound of the formula R1-CO-NR2-CH2)b SiR3aO(3-a)/2, in which R1 and R2 are each a hydrogen atom or a monovalent hydrocarbon group, R3 is a hydrogen atom, or monovalent hydrocarbon group, a is 0-3 and b is a positive integer not larger than 10, in addition to the usual components of conventional room temperature curable silicone rubber compositions.
Inventors
- 👤 Yoshio Inoue
- 👤 Masatoshi Arai
- 👤 Takeo Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/54; C08K5/544; C08K5/5455
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
201 words
A room temperature curable silicone rubber composition which comprises: (a) 100 parts by weight of a diorganopolysiloxane having a viscosity ranging from 100 to 1,000,000 centistokes, which is terminated at both molecular chain ends with a silanolic hydroxy group bonded to the terminal silicon atom; (b) from 0.01 to 25 parts by weight of an organosilicon compound having at least two hydrolyzable groups bonded to the silicon atoms in a molecule; (c) from 0.01 to 5.0 parts by weight of a surface active agent having at least one fluorine atom in a molecule; (d) from 0.01 to 10 parts by weight of an organosilicon compound having, in a molecule, at least one organosilicon unit epresented by the general formula R.sup.1 --CO--NR.sup.2 --CH.sub.2).sub.b SiR.sup.3.sub.a O.sub.(3--a)2' in which R 1 , R 2 and R 3 may be the same or different and are elected from the group consisting of monovalent hydrocarbon having from 1 to 8 carbon atoms, monovalent hydrocarbon having 1 to 8 carbon atoms substituted with halogen or cyano and hydrogen, a is zero, 1, 2 or 3 and b is a positive integer not larger than 10; and (e) from 1 to 400 parts by weight of a filler.
Claim 2
Dependent Claim
201 words
A room temperature curable silicone rubber composition which comprises: (a) 100 parts by weight of a diorganopolysiloxane having a viscosity ranging from 100 to 1,000,000 centistokes, which is terminated at both molecular chain ends with a silanolic hydroxy group bonded to the terminal silicon atom; (b) from 0.01 to 25 parts by weight of an organosilicon compound having at least two hydrolyzable groups bonded to the silicon atoms in a molecule; (c) from 0.01 to 5.0 parts by weight of a surface active agent having at least one fluorine atom in a molecule; (d) from 0.01 to 10 parts by weight of an organosilicon compound having, in a molecule, at least one organosilicon unit epresented by the general formula R.sup.1 --CO--NR.sup.2 --CH.sub.2).sub.b SiR.sup.3.sub.a O.sub.(3--a)2' in which R 1 , R 2 and R 3 may be the same or different and are elected from the group consisting of monovalent hydrocarbon having from 1 to 8 carbon atoms, monovalent hydrocarbon having 1 to 8 carbon atoms substituted with halogen or cyano and hydrogen, a is zero, 1, 2 or 3 and b is a positive integer not larger than 10; and (e) from 1 to 400 parts by weight of a filler.
Claim 3
Dependent Claim
68 words
The room temperature curable silicone rubber composition as claimed in claim 1 wherein the component (d) is an organosilicon compound represented by the general formula R.sup.1 --CO--NR.sup.2 --CH.sub.2).sub.3 SiR.sup.3.sub.a (OSiR.sup.4.sub.3).sub.3-a, in which R 1 , R 2 , R 3 and a each have the same meaning as defined above and R 4 is a group or atom selected from the same class as for R 3 .
Claim 4
Dependent Claim
28 words
The composition of claim 1 further comprising a curing catalyst in an amount from 0.01 to 5 parts by weight per 100 parts by weight of component (a).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-21 | 1991-03-23 | 1991-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-21 | 1995-03-23 | 1995-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-21 | 1999-03-23 | 1999-09-22 | $7700.00 | Window Closed / Lapsed |