Patent US4728709A successfully refreshed from Google Patents.
US4728709A
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Terminal cluster vinyl silicones and acrylate cluster silicones therefrom
Assignee: Henkel Loctite Corp
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Filing: 1986-03-10
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Granted: 1988-03-01
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Expires: 2006-03-10
Abstract
Abstract A polyorganosiloxane polymer having a structure represented by one of the formulas (AB).sub.m C or [(AB).sub.m ].sub.n SiR.sub.(4-n) where the R groups are the same or different organic groups other than acrylic groups or groups co-curable therewith; A is a linear polyorganosiloxane segment containing between 3 and about 50 siloxane repeat units at least 3 of which are acrylic group containing repeat units represented by the formula ##STR1## where R 1 is lower alkyl, the R 2 groups are the same or different alkylene, alkyleneoxy or alkenylene groups, and y is 0-4; B is a polyorganosiloxane segment represented by the formula ##STR2## where x is an integer of at least 100; C is A or a triorganosilyl group; m is an integer of 1 or more; and n is 3 or 4.
Inventors
- 👤 Philip Klemarczyk
- 👤 Samuel Q. S. Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:25
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081; C07F7/0896; C07F7/18; C07F7/1804; C08C; C08C19/00; C08C19/25; C08F; C08F290/00; C08F290/08; C08F290/12; C08F290/128; C08F299/00; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A polyorganosiloxane polymer having terminal vinyl clusters represented by the formula (DB).sub.m C.sup.1 or [(DB).sub.m ].sub.n SiR.sub.(4-n)/2 where the R groups are the same or different organic groups other than acrylic groups or groups co-curable therewith; B is a polyorganosiloxane segment represented by the formula ##STR12## where x is an integer of at least 100; C 1 is D or a triorganosilyl group; m is an integer of 1 or more; n is 3 or 4; and D is a linear polyorganosiloxane segment containing between 3 and about 50 siloxane repeat units at least 3 of which contain pendant alkenyl or alkynyl groups.
Claim 2
Dependent Claim
103 words
A polyorganosiloxane polymer having terminal vinyl clusters represented by the formula (DB).sub.m C.sup.1 or [(DB).sub.m ].sub.n SiR.sub.(4-n)/2 where the R groups are the same or different organic groups other than acrylic groups or groups co-curable therewith; B is a polyorganosiloxane segment represented by the formula ##STR12## where x is an integer of at least 100; C 1 is D or a triorganosilyl group; m is an integer of 1 or more; n is 3 or 4; and D is a linear polyorganosiloxane segment containing between 3 and about 50 siloxane repeat units at least 3 of which contain pendant alkenyl or alkynyl groups.
Claim 3
Dependent Claim
100 words
An organosiloxane block copolymer comprising: (a) at least one siloxane block having at least 100 siloxane units, said units having the formula R 2 SiO, (b) at least one siloxane block consisting of between 3 and 50 siloxane units of the formula: R.sup.1.sub.2 SiO and, optionally, (c) a siloxane block comprising a siloxane unit of the formula RSiO.sub.1.5 or SiO.sub.2 where R is alkyl, substituted alkyl or aryl; and the R 1 groups are the same or different R, alkenyl groups or alkynyl groups, provided that at least 3 units R 1 2 SiO include an alkenyl or alkynyl group.
Claim 4
Dependent Claim
100 words
An organosiloxane block copolymer comprising: (a) at least one siloxane block having at least 100 siloxane units, said units having the formula R 2 SiO, (b) at least one siloxane block consisting of between 3 and 50 siloxane units of the formula: R.sup.1.sub.2 SiO and, optionally, (c) a siloxane block comprising a siloxane unit of the formula RSiO.sub.1.5 or SiO.sub.2 where R is alkyl, substituted alkyl or aryl; and the R 1 groups are the same or different R, alkenyl groups or alkynyl groups, provided that at least 3 units R 1 2 SiO include an alkenyl or alkynyl group.
Claim 5
Dependent Claim
23 words
A block copolymer as in claim 2 where at least 3 units of the formula R 1 2 SiO include a vinyl group.
Claim 6
Dependent Claim
21 words
A composition comprising a block copolymer as in claim 2, a siloxane compound with silicon hydride functionality and a hydrosilation catalyst.
Claim 7
Dependent Claim
23 words
A composition as in claim 4 where at least 3 units R 1 2 SiO of the block copolymer include a vinyl group.
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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |