Patent US4956206A successfully refreshed from Google Patents.
US4956206A
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Release composition
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1989-02-15
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Granted: 1990-09-11
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Expires: 2009-02-15
Abstract
Abstract An adhesive release composition containing specific amounts of an organopolysiloxane bearing oxyalkylene groups and alkenyl groups, an organohydrogenpolysiloxane, and a platinum-type catalyst is characterized by the formation, on various base surfaces, of a release surface having an excellent printability and a stable release force. For example, a roll of pressure sensitive adhesive tape of this invention can be easily unrolled, durably adhered to an article and clearly printed with ink on its adhesive-releasing surface which bears the release composition of this invention.
Inventors
- 👤 Nobuo Kaiya
- 👤 Shosaku Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:25
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/10; C08L83/12; C08L83/04; C08L83/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
207 words
An adhesive adhesive release composition comprising: (A) 100 weight parts of an oxyalkylene group-containing organopolysiloxane having at least 3 silicon-bonded alkenyl groups in each molecule, as expressed by the formula R 2 (R 1 R 3 SiO) x (R 1 2 SiO) y SiR 1 2 R 2 , wherein R 1 is a monovalent hydrocarbon group; R 2 is selected from the group consisting of the hydroxyl group, an R 1 group, and an R 3 group; R 3 is a group having the formula --(R 4 ) a --O--(R 5 O) z R 6 wherein R 4 and R 5 are alkylene groups having 2 to 6 carbon atoms; R 6 is the hydrogen atom or a monovalent organic group having 1 to 10 carbon atoms, a is one or zero, z has an average value of from 1 to 100; and x and y are greater than or equal to one, with the provisos that y/x has an average value of 0.1 to 100 and (x+y) has an average value of at least 10; (B) 0.5 to 20 weight parts of an organohydrogenpolysiloxane having at least 3 silicon-bonded hydrogen atoms in each molecule; and (C) a catalytic quantity of a platinum group metal-containing catalyst.
Claim 2
Dependent Claim
207 words
An adhesive adhesive release composition comprising: (A) 100 weight parts of an oxyalkylene group-containing organopolysiloxane having at least 3 silicon-bonded alkenyl groups in each molecule, as expressed by the formula R 2 (R 1 R 3 SiO) x (R 1 2 SiO) y SiR 1 2 R 2 , wherein R 1 is a monovalent hydrocarbon group; R 2 is selected from the group consisting of the hydroxyl group, an R 1 group, and an R 3 group; R 3 is a group having the formula --(R 4 ) a --O--(R 5 O) z R 6 wherein R 4 and R 5 are alkylene groups having 2 to 6 carbon atoms; R 6 is the hydrogen atom or a monovalent organic group having 1 to 10 carbon atoms, a is one or zero, z has an average value of from 1 to 100; and x and y are greater than or equal to one, with the provisos that y/x has an average value of 0.1 to 100 and (x+y) has an average value of at least 10; (B) 0.5 to 20 weight parts of an organohydrogenpolysiloxane having at least 3 silicon-bonded hydrogen atoms in each molecule; and (C) a catalytic quantity of a platinum group metal-containing catalyst.
Claim 3
Dependent Claim
27 words
An adhesive release composition according to claim 1 wherein the methyl group comprise at least 80% of R 1 groups and a has a value of 1.
Claim 4
Dependent Claim
26 words
An adhesive release composition according to claim 2 wherein Component (B) is a trimethylsiloxy-terminated poly(methylhydrogen)siloxane and Component (C) is a complex of chloroplatinic acid and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane.
Claim 5
Dependent Claim
15 words
An adhesive release composition according to claim 3 wherein R 2 is the hydroxyl group.
Claim 6
Dependent Claim
15 words
An adhesive release composition according to claim 3 wherein R 2 is the vinyl group.
Claim 7
Dependent Claim
167 words
An oxyalkylene group-containing organopolysiloxane compound having at least 3 silicon-bonded alkenyl groups in each molecule, as expressed by the formula R 2 (R 1 R 3 SiO) x (R 1 2 SiO) y SiR 1 2 R 2 , wherein R 1 is a monovalent hydrocarbon group; R 2 is selected from the group consisting of the hydroxyl group, an R 1 group, and an R 3 group; R 3 is a group having the formula --(R 4 ) a --O--(R 5 O) z R 6 wherein R 4 and R 5 are alkylene groups having 2 to 6 carbon atoms; R 6 is the hydrogen atom or a monovalent organic group having 1 to 10 carbon atoms, a is one or zero, z has an average value of from 1 to 100; and x and y are greater than or equal to one, with the provisos that y/x has an average value of 0.1 to 100 and (x+y) has an average value of at least 10.
Claim 8
Dependent Claim
167 words
An oxyalkylene group-containing organopolysiloxane compound having at least 3 silicon-bonded alkenyl groups in each molecule, as expressed by the formula R 2 (R 1 R 3 SiO) x (R 1 2 SiO) y SiR 1 2 R 2 , wherein R 1 is a monovalent hydrocarbon group; R 2 is selected from the group consisting of the hydroxyl group, an R 1 group, and an R 3 group; R 3 is a group having the formula --(R 4 ) a --O--(R 5 O) z R 6 wherein R 4 and R 5 are alkylene groups having 2 to 6 carbon atoms; R 6 is the hydrogen atom or a monovalent organic group having 1 to 10 carbon atoms, a is one or zero, z has an average value of from 1 to 100; and x and y are greater than or equal to one, with the provisos that y/x has an average value of 0.1 to 100 and (x+y) has an average value of at least 10.
Claim 9
Dependent Claim
28 words
An oxyalkylene group-containing organopolysiloxane compound according to claim 6 wherein the methyl group comprise at least 80% of R 1 groups and a has a value of 1.
Claim 10
Dependent Claim
16 words
An oxyalkylene group-containing organopolysiloxane compound according to claim 7 wherein R 2 is the hydroxyl group.
Claim 11
Dependent Claim
16 words
An oxyalkylene group-containing organopolysiloxane compound according to claim 7 wherein R 2 is the vinyl group.
Claim 12
Independent Claim
236 words
A method comprising: (I) preparing a coatable mixture, by mixing to homogenity, components comprising (A) 100 weight parts of an oxyalkylene group-containing organopolysiloxane having at least 3 silicon-bonded alkenyl groups in each molecule, as expressed by the formula R 2 (R 1 R 3 SiO) x (R 1 2 SiO) y SiR 1 2 R 2 , wherein R 1 is a monovalent hydrocarbon group; R 2 is selected from the group consisting of the hydroxyl group, an R 1 group, and an R 3 group; R 3 is a group having the formula --(R 4 ) a --O--(R 5 O) z R 6 wherein R 4 and R 5 are alkylene groups having 2 to 6 carbon atoms; R 6 is the hydrogen atom or a monovalent organic group having 1 to 10 carbon atoms, a is one or zero, z has an average value of from 1 to 100; and x and y are greater than or equal to one, with the provisos that y/x has an average value of 0.1 to 100 and (x+y) has an average value of at least 10; (B) 0.5 to 20 weight parts of an organohydrogenpolysiloxane having at least 3 silicon-bonded hydrogen atoms in each molecule; and (C) a catalytic quantity of a platinum group metal-containing catalyst; (II) coating the mixture of (I) onto a base substrate; and (III) causing the coated mixture to cure to a solid.
Claim 13
Independent Claim
236 words
A method comprising: (I) preparing a coatable mixture, by mixing to homogenity, components comprising (A) 100 weight parts of an oxyalkylene group-containing organopolysiloxane having at least 3 silicon-bonded alkenyl groups in each molecule, as expressed by the formula R 2 (R 1 R 3 SiO) x (R 1 2 SiO) y SiR 1 2 R 2 , wherein R 1 is a monovalent hydrocarbon group; R 2 is selected from the group consisting of the hydroxyl group, an R 1 group, and an R 3 group; R 3 is a group having the formula --(R 4 ) a --O--(R 5 O) z R 6 wherein R 4 and R 5 are alkylene groups having 2 to 6 carbon atoms; R 6 is the hydrogen atom or a monovalent organic group having 1 to 10 carbon atoms, a is one or zero, z has an average value of from 1 to 100; and x and y are greater than or equal to one, with the provisos that y/x has an average value of 0.1 to 100 and (x+y) has an average value of at least 10; (B) 0.5 to 20 weight parts of an organohydrogenpolysiloxane having at least 3 silicon-bonded hydrogen atoms in each molecule; and (C) a catalytic quantity of a platinum group metal-containing catalyst; (II) coating the mixture of (I) onto a base substrate; and (III) causing the coated mixture to cure to a solid.
Claim 14
Dependent Claim
27 words
A method according to claim 10 wherein the methyl group comprise at least 80 mole % of R 1 groups and a has a value of 1.
Claim 15
Dependent Claim
24 words
A method according to claim 11 wherein Component (B) is a trimethylsiloxy-terminated poly(methylhydrogen)siloxane and Component (C) is a complex of chloroplatinic acid and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane.
Claim 16
Dependent Claim
13 words
A method according to claim 12 wherein R 2 is the hydroxyl group.
Claim 17
Dependent Claim
13 words
A method according to claim 12 wherein R 2 is the vinyl group.
References Cited (Backward Citations)
US4057596A
Cited
US4631208A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |