US5075349A
Expired / Lapsed
US
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Novel radiation-curable polymeric composition containing a diorganopolysiloxane with (meth)acryloxy end groups
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1990-05-29
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Granted: 1991-12-24
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Expires: 2010-05-29
Abstract
Abstract A radiation-curable surface-releasing agent is proposed which is capable of giving surface releasability to a substrate surface by irradiation with electron beams or ultraviolet light exhibiting outstandingly low peeling resistance against peeling of pressure-sensitive adhesive tapes applied and bonded to the release-treated surface and very small migration of the releasing ingredient toward the adhesive surface. The surface-releasing agent is a composition comprising a linear diorganopolysiloxane having, only at one of the molecular chain ends, at least one (meth)acryloxy groups and a poly(meth)acrylate compound such as trimethylol propane tri(meth)acrylate, diethylene glycol di(meth)acrylate, pentaerithritol tri(meth)acrylate and the like.
Inventors
- 👤 Toshio Ohba
- 👤 Kenichi Isobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:19
CPC Classifications
C; C09; C09J; C09J4/00; C09J4/06; C08; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/068
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
An organopolysiloxane composition radiation curable to form a surface release agent which comprises, as a mixture: (a) from 5 to 95 parts by weight of an organopolysiloxane having a degree of polymerization of from 3 to 100 and a linear molecular structure having, at only one of the molecular chain ends, at least one (meth)acryloxy group of the formula CH 2 ═CR 1 --CO--O--, in which R 1 is a hydrogen atom or a methyl group, the other end of the molecular chain being free from acryloxy or (meth) acryloxy groups, and (b) from 95 to 5 parts by weight of a (meth) acrylate ester compound of a polyhydric alcohol represented by the general formula: in which R 1 has the same meaning as defined above, the subscript p is a positive integer not exceeding 6 and R 2 is a residue of a polyhydric alcohol or a partial ester of a polyhydric alcohol with a polybasic carboxylic acid obtained by removing p in number of the hydroxy groups in a molecule of the polyhydric alcohol of the partial ester of a polyhydric alcohol with a polybasic carboxylic acid.
Claim 2
Dependent Claim
189 words
An organopolysiloxane composition radiation curable to form a surface release agent which comprises, as a mixture: (a) from 5 to 95 parts by weight of an organopolysiloxane having a degree of polymerization of from 3 to 100 and a linear molecular structure having, at only one of the molecular chain ends, at least one (meth)acryloxy group of the formula CH 2 ═CR 1 --CO--O--, in which R 1 is a hydrogen atom or a methyl group, the other end of the molecular chain being free from acryloxy or (meth) acryloxy groups, and (b) from 95 to 5 parts by weight of a (meth) acrylate ester compound of a polyhydric alcohol represented by the general formula: in which R 1 has the same meaning as defined above, the subscript p is a positive integer not exceeding 6 and R 2 is a residue of a polyhydric alcohol or a partial ester of a polyhydric alcohol with a polybasic carboxylic acid obtained by removing p in number of the hydroxy groups in a molecule of the polyhydric alcohol of the partial ester of a polyhydric alcohol with a polybasic carboxylic acid.
Claim 3
Dependent Claim
25 words
The radiation-curable organopolysiloxane composition as claimed in claim 1 wherein the subscript p in the formula representing the component (b) is 2, 3 or 4.
Claim 4
Dependent Claim
37 words
The radiation-curable organopolysiloxane composition as claimed in claim 2 wherein the component (b) is a compound selected from the group consisting of diethylene glycol diacrylate, tetraethylene glycol diacrylate, trimethylol propane triacrylate, pentaerithritol triacrylate and trimethylol propane trimethacrylate.
Claim 5
Dependent Claim
45 words
The radiation-curable organopolysiloxane composition as claimed in claim 1 wherein the amount of the component (a) is in the range from 5 to 25 parts by weight and the amount of the component (b) is in the range from 95 to 75 parts by weight.
Claim 6
Dependent Claim
31 words
The radiation-curable organopolysiloxane composition as claimed in claim 1 wherein the organopolysiloxane as the component (a) has a viscosity in the range from 30 to 1000 centipoise at 25 ° C.
Claim 7
Dependent Claim
32 words
The radiation-curable organopolysiloxane composition as claimed in claim 1 wherein the (meth)acrylate ester compound as the component (b) has a viscosity in the range from 30 to 10000 centipoise at 25° C.
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) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |