US4931485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organopolysiloxane composition
Assignee: Shin-Etsu Chemical Co Ltd
•
Filing: 1988-09-09
•
Granted: 1990-06-05
•
Expires: 2008-09-09
Abstract
Abstract Disclosed herein is a foamable organopolysiloxane composition which comprises an organopolysiloxane base polymer containing a vinyl group-containing organopolysiloxane, organohydroxypolysiloxane, and organohydrogenpolysiloxane, and a specific siloxane copolymer containing an alkenyloxysilyl group. The composition readily foams and cures at room temperature to give a silicone rubber foam of high strength, which is useful as a filler and sealant for buildings.
Inventors
- 👤 Yoshio Inoue
- 👤 Atsushi Yaginuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:35
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
A foamable organopolysiloxane composition which comprises an organopolysiloxane base polymer containing a vinyl group-containing organopolysiloxane, an organohydroxypolysiloxane and an organohydrogenpolysiloxane; and a siloxane copolymer selected from copolymer (I) composed of: (A) ##STR19## unit, (B) R 5 3 SiO 0 .5 unit and (C) SiO 2 unit where R 1 , R 2 , R 4 , and R 5 each denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups; R 3 denotes a hydrogen atom or monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon group; n denotes an integer of 0, 1 or 2; and m denotes an integer of 2 to 6 or copolymer (II) composed of unit (A), unit (B), unit (C) and (D) R 6 2 SiO unit, where R 6 denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups, where R 6 denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups, wherein unit (A), unit (B) and unit (C) are defined as above.
Claim 2
Dependent Claim
159 words
A foamable organopolysiloxane composition which comprises an organopolysiloxane base polymer containing a vinyl group-containing organopolysiloxane, an organohydroxypolysiloxane and an organohydrogenpolysiloxane; and a siloxane copolymer selected from copolymer (I) composed of: (A) ##STR19## unit, (B) R 5 3 SiO 0 .5 unit and (C) SiO 2 unit where R 1 , R 2 , R 4 , and R 5 each denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups; R 3 denotes a hydrogen atom or monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon group; n denotes an integer of 0, 1 or 2; and m denotes an integer of 2 to 6 or copolymer (II) composed of unit (A), unit (B), unit (C) and (D) R 6 2 SiO unit, where R 6 denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups, where R 6 denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups, wherein unit (A), unit (B) and unit (C) are defined as above.
Claim 3
Dependent Claim
57 words
The composition as claimed in claim 1, wherein the siloxane copolymer (I) is one which contains monofunctional units and tetrafunctional units in a molar ratio of monofunctional units based on tetrafunctional units of 0.01 to 2:1 and unit (A) and unit (B) in a molar ratio of unit (A) based on unit (B) of 0.01 to 1:1.
Claim 4
Dependent Claim
75 words
The composition as claimed in claim 1, wherein the siloxane copolymer (II) contains monofunctional units and tetrafunctional units in a molar ratio of monofunctional units based on tetrafunctional units of 0.01 to 2:1, difunctional units and tetrafunctional units in a molar ratio of difunctional units based on tetrafunctional units of 2 or less: 1 and unit (A) and unit (B) in a molar ratio of unit (A) based on unit (B) of 0.01 to 1:1.
Claim 5
Dependent Claim
18 words
The composition as claimed in claim 1, wherein the siloxane copolymer is one which is composed of ##STR20##
Claim 6
Dependent Claim
58 words
The composition as claimed in claim 1, wherein the vinyl group-containing organopolysiloxane is one which is represented by formula (1) below: ##STR21## where R 7 and R 8 each denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups, and n denotes a number of 50 to 2000 and has a viscosity of 10,000,000 cSt at 25° C.
Claim 7
Dependent Claim
81 words
The composition as claimed in claim 1, wherein the organohydroxypolysiloxane is one which contains at least three units represented by formula (2) below in one molecule, ##EQU2## where R 9 denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups; and a denotes 0, 1, or 2; b denotes 1, 2, or 3; and a+b denotes 1, 2, or 3, contains no aliphatic unsaturated hydrocarbon groups in the molecule and has a viscosity of 10 to 10,000 cSt at 25° C.
Claim 8
Dependent Claim
80 words
The composition as claimed in claim 1, wherein the organohydrogenpolysiloxane is one which contains at least two units represented by formula (3) below in one molecule, ##EQU3## where R 10 denotes a monovalent hydrocarbon group excluding aliphatic unsaturated hydrocarbon groups, c denotes 0, 1, or 2; d denotes 1, 2, or 3; and c+d denotes 1, 2, or 3, contains no aliphatic unsaturated hydrocarbon groups in the molecule, and has a viscosity of 1 to 100,000 cSt at 25° C.
Claim 9
Dependent Claim
28 words
The composition as claimed in claim 1, which further comprises a catalyst component selected from the group consisting of a platinum metal, platinum metal compounds and complexes thereof.
Claim 10
Dependent Claim
33 words
The composition as claimed in claim 1, which further comprises a catalyst component selected from the group consisting of chloroplatinic acid, platinum-olefin complex, Platinum-vinyl silane complex, platinumsiloxane complex, platinum phosphite and platinum-phosphine complex.
References Cited (Backward Citations)
US3425967A
Cited
US4418157A
Cited
US4631299A
Cited
US4550125A
Cited
US4555529A
Cited
US4608396A
Cited
US4801622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |