US4631321A
Expired / Lapsed
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Alkenyl organopolysiloxane and curable composition therefrom
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1985-02-21
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Granted: 1986-12-23
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Expires: 2005-02-21
Abstract
Abstract Organopolysiloxanes which have end groups of the general formula ##STR1## where R is alkenyl, Z is alkylene, R 1 is a monovalent organic group, and a is 2 or 3, when mixed with organohydrogensiloxane and a platinum catalyst cure to high strength products without the use of a reinforcing filler.
Inventors
- 👤 Toshio Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/14; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/18; C08G77/20; C08G77/22; C08G77/24; C08G77/70
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
126 words
A curable organopolysiloxane composition comprising (a) organopolysiloxane in which at least the molecular chain ends possess groups with a general formula selected from the group consisting of ##STR16## wherein R is an alkenyl group, R 1 is a monovalent organic group selected from the group consisting of alkyl, alkenyl, alkoxy, aryl, and halogenated alkyl, Z is an alkylene group, and a is 2 or 3, (b) organohydrogenpolysiloxane which contains at least two silicon-bonded hydrogen atoms per molecule, and (c) a catalytic quantity of platinum or a platinum-type compound, in said curable organopolysiloxane composition the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is in a molar ratio of from 1:0.1 to 1:10.
Claim 2
Dependent Claim
126 words
A curable organopolysiloxane composition comprising (a) organopolysiloxane in which at least the molecular chain ends possess groups with a general formula selected from the group consisting of ##STR16## wherein R is an alkenyl group, R 1 is a monovalent organic group selected from the group consisting of alkyl, alkenyl, alkoxy, aryl, and halogenated alkyl, Z is an alkylene group, and a is 2 or 3, (b) organohydrogenpolysiloxane which contains at least two silicon-bonded hydrogen atoms per molecule, and (c) a catalytic quantity of platinum or a platinum-type compound, in said curable organopolysiloxane composition the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is in a molar ratio of from 1:0.1 to 1:10.
Claim 3
Dependent Claim
23 words
The composition according to claim 1 in which the molecular chain ends have a general formula ##STR17## and Z is an alkylene radical.
Claim 4
Dependent Claim
13 words
The composition according to claim 2 in which the alkylene radical is ethylene.
Claim 5
Dependent Claim
12 words
The composition according to claim 3 in which R 1 is methyl.
Claim 6
Dependent Claim
11 words
The composition according to claim 4 in which a is 3.
Claim 7
Dependent Claim
11 words
The composition according to claim 5 in which a is 2.
Claim 8
Dependent Claim
17 words
The composition according to claim 1 in which the molecular chain ends have a general formula ##STR18##
Claim 9
Dependent Claim
11 words
The composition according to claim 7 in which a is 3.
Claim 10
Dependent Claim
36 words
The composition according to claim 5 in which the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is from 1:0.3 to 1:3.
Claim 11
Dependent Claim
36 words
The composition according to claim 6 in which the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is from 1:0.3 to 1:3.
Claim 12
Dependent Claim
36 words
The composition according to claim 8 in which the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is from 1:0.1 to 1:3.
Claim 13
Dependent Claim
128 words
A curable organopolysiloxane composition consisting essentially of (a) organopolysiloxane in which at least the molecular chain ends possess groups with a general formula selected from the group consisting of ##STR19## wherein R is an alkenyl group, R 1 is a monovalent organic group selected from the group consisting of alkyl, alkenyl, alkoxy, aryl, and halogenated alkyl, Z is an alkylene group, and a is 2 or 3, (b) organohydrogenpolysiloxane which contains at least two silicon-bonded hydrogen atoms per molecule, and (c) a catalytic quantity of platinum or a platinum-type compound, in said curable organopolysiloxane composition the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is in a molar ratio of from 1:0.1 to 1:10.
Claim 14
Dependent Claim
128 words
A curable organopolysiloxane composition consisting essentially of (a) organopolysiloxane in which at least the molecular chain ends possess groups with a general formula selected from the group consisting of ##STR19## wherein R is an alkenyl group, R 1 is a monovalent organic group selected from the group consisting of alkyl, alkenyl, alkoxy, aryl, and halogenated alkyl, Z is an alkylene group, and a is 2 or 3, (b) organohydrogenpolysiloxane which contains at least two silicon-bonded hydrogen atoms per molecule, and (c) a catalytic quantity of platinum or a platinum-type compound, in said curable organopolysiloxane composition the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is in a molar ratio of from 1:0.1 to 1:10.
Claim 15
Dependent Claim
127 words
A curable organopolysiloxane composition consisting of (a) organopolysiloxane in which at least the molecular chain ends possess groups with a general formula selected from the group consisting of ##STR20## wherein R is an alkenyl group, R 1 is a monovalent organic group selected from the group consisting of alkyl, alkenyl, alkoxy, aryl, and halogenated alkyl, Z is an alkylene group, and a is 2 or 3, (b) organohydrogenpolysiloxane which contains at least two silicon-bonded hydrogen atoms per molecule, and (c) a catalytic quantity of platinum or a platinum-type compound, in said curable organopolysiloxane composition the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is in a molar ratio of from 1:0.1 to 1:10.
Claim 16
Dependent Claim
127 words
A curable organopolysiloxane composition consisting of (a) organopolysiloxane in which at least the molecular chain ends possess groups with a general formula selected from the group consisting of ##STR20## wherein R is an alkenyl group, R 1 is a monovalent organic group selected from the group consisting of alkyl, alkenyl, alkoxy, aryl, and halogenated alkyl, Z is an alkylene group, and a is 2 or 3, (b) organohydrogenpolysiloxane which contains at least two silicon-bonded hydrogen atoms per molecule, and (c) a catalytic quantity of platinum or a platinum-type compound, in said curable organopolysiloxane composition the blending ratio of (a) to (b) is such that the total alkenyl groups in (a) to total silicon-bonded hydrogen atoms in (b) is in a molar ratio of from 1:0.1 to 1:10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |