Patent US4683278A successfully refreshed from Google Patents.
US4683278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkenyl organopolysiloxane and curable composition therefrom
Assignee: DuPont Toray Specialty Materials KK
•
Filing: 1986-08-18
•
Granted: 1987-07-28
•
Expires: 2006-08-18
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
2026-11-09 05:25
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: 6
Claim 1
Independent Claim
63 words
An organopolysiloxane comprising a polymer in which at least the molecular chain ends possess groups with a general formula selected from the group consisting of ##STR18## 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.
Claim 2
Dependent Claim
63 words
An organopolysiloxane comprising a polymer in which at least the molecular chain ends possess groups with a general formula selected from the group consisting of ##STR18## 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.
Claim 3
Dependent Claim
65 words
An organopolysiloxane consisting essentially of a polymer 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.
Claim 4
Dependent Claim
65 words
An organopolysiloxane consisting essentially of a polymer 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.
Claim 5
Dependent Claim
64 words
An organopolysiloxane consisting of a polymer 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.
Claim 6
Dependent Claim
64 words
An organopolysiloxane consisting of a polymer 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.
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) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |