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US5073422A
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Pressure-sensitive adhesive structure
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1988-12-09
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Granted: 1991-12-17
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Expires: 2008-12-09
Abstract
Abstract A pressure-sensitive adhesive structure such as a pressure-sensitive adhesive tape, label or the like having a release agent layer, wherein said release agent layer comprises a cured fluorosilicone composition comprising: (a) a particular organopolysiloxane having in its molecule silicon-bonded alkenyl groups and at least one member selected from the group consisting of silicon-bonded fluorine-containing substituents represented respectively by Formulas (1) to (4): <IMAGE> (1) where n is an integer of 1 to 5. <IMAGE> (2) where n is an integer of 1 to 5. CmF2m+1CH2CH2OCH2CH2CH2-(3) where m is an integer of 3 to 10. CmF2m+1CH2OCH2CH2CH2-(4) where m is an integer of 3 to 10. (b) an organohydrogenpolysiloxane; and (c) a catalyst, in a particular proportion. The release properties of the release agent layer show good and high stability with time, promising practical utilities over a long period of time.
Inventors
- 👤 Hiroki Konno
- 👤 Hirofumi Kishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:17
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/24; C09; C09J; C09J7/00; C09J7/20; C09J7/201; C09J7/21; C09J7/22; C09J7/30; C09J7/38; C09J7/40; C09J2427/00; C09J2427/005; C09J2483/00; C09J2483/005; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1424; Y10T428/1429; Y10T428/28; Y10T428/2839
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
142 words
A pressure-sensitive adhesive structure comprising a substrate layer, a pressure-sensitive adhesive layer and a release agent layer, wherein said release agent layer comprises a cured product of a curable fluorosilicone composition comprising: (a) an organopolysiloxane having in its molecule at least two silicon-bonded alkenyl groups and containing in its molecule at least one member selected from the group consisting of silicon-bonded fluorine-containing substituents represented respectively by Formulas (1) to (2): ##STR22## where n is an integer of 1 to 5, ##STR23## where n is an integer of 1 to 5, (b) an organohydrogenpolysiloxane having in its molecule at least three silicon-bonded hydrogen atoms; and (c) a catalyst for addition reaction between said silicon-bonded alkenyl groups and said silicon-bonded hydrogen atoms; the proportion of said silicon-bonded hydrogen atoms in Component (b) to said silicon-bonded alkenyl groups in Component (a) being at least 0.5.
Claim 2
Dependent Claim
142 words
A pressure-sensitive adhesive structure comprising a substrate layer, a pressure-sensitive adhesive layer and a release agent layer, wherein said release agent layer comprises a cured product of a curable fluorosilicone composition comprising: (a) an organopolysiloxane having in its molecule at least two silicon-bonded alkenyl groups and containing in its molecule at least one member selected from the group consisting of silicon-bonded fluorine-containing substituents represented respectively by Formulas (1) to (2): ##STR22## where n is an integer of 1 to 5, ##STR23## where n is an integer of 1 to 5, (b) an organohydrogenpolysiloxane having in its molecule at least three silicon-bonded hydrogen atoms; and (c) a catalyst for addition reaction between said silicon-bonded alkenyl groups and said silicon-bonded hydrogen atoms; the proportion of said silicon-bonded hydrogen atoms in Component (b) to said silicon-bonded alkenyl groups in Component (a) being at least 0.5.
Claim 3
Dependent Claim
92 words
The pressure-sensitive adhesive structure according to claim 1, wherein Component (a) in said fluorosilicone composition is represented by Formula (5): ##STR24## wherein R 1 represents a C 2 to C 8 alkenyl group; R 2 may be the same or different and represents a C 1 to C 8 alkyl group or a phenyl group; Rf represents at least one selected from the fluorine-containing substituents represented by the above Formulas (1) to (2); a is an integer of 1; and x, y and z are integers of x≦0, y≦1 and z≦0, respectively.
Claim 4
Dependent Claim
39 words
The pressure-sensitive adhesive structure according to claim 2, wherein Component (a) in said fluorosilicone composition is represented by Formula (6): ##STR25## wherein R 2 , Rf, x, y and z are the same as defined in said Formula (5).
Claim 5
Dependent Claim
36 words
The pressure-sensitive adhesive structure according to claim 1, wherein the fluorine-containing substituent in Component (a) in said fluorosilicone composition is contained in an amount of 3 mole % or more of the whole silicon-bonded organic substituents.
Claim 6
Dependent Claim
26 words
The pressure-sensitive adhesive structure according to claim 1, wherein the proportion of Si-H in Component (b) to said Si-alkenyl in Component (a) is 0.5:1 to 10:1.
Claim 7
Dependent Claim
16 words
The pressure-sensitive adhesive structure according to claim 1, wherein said Component (c) is a platinum catalyst.
Claim 8
Dependent Claim
38 words
The pressure-sensitive adhesive structure according to claim 1, comprising a substrate layer, a release agent layer provided on one side of said substrate layer, and a pressure-sensitive adhesive layer provided on the other side of said substrate layer.
Claim 9
Dependent Claim
35 words
The pressure-sensitive adhesive structure according to claim 1, comprising a substrate layer, a release agent layer provided on one side of said substrate layer, and a pressure-sensitive adhesive layer provided on said release agent layer.
Claim 10
Dependent Claim
53 words
The pressure-sensitive adhesive structure according to claim 1, comprising a substrate layer provided with pressure-sensitive adhesive layers on its both sides, and a laminating substrate layer provided with release agent layers on its both sides; one of said pressure-sensitive adhesive layers and one of said release agent layers being jointed face to face.
Claim 11
Dependent Claim
41 words
The pressure-sensitive adhesive structure according to claim 1, comprising a substrate layer, a pressure-sensitive adhesive layer provided on its one side, a release agent layer provided on said pressure-sensitive adhesive layer, and a laminating substrate provided on said release agent layer.
Claim 12
Dependent Claim
39 words
The pressure-sensitive adhesive structure according to claim 1, wherein said substrate layer comprises a material selected from the group consisting of paper, a rubber sheet, a PET sheet, a Kapton sheet, metal foil, a Teflon sheet, and asbestos cloth.
Claim 13
Dependent Claim
16 words
The pressure-sensitive adhesive structure according to claim 1, wherein said substrate layer has a roughened surface.
Claim 14
Dependent Claim
56 words
The pressure-sensitive adhesive structure according to claim 1, wherein said pressure-sensitive adhesive layer comprises at least one selected from the group consisting of a silicone pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, a rubbery pressure-sensitive adhesive, a phenolic pressure-sensitive adhesive, a styrene/isopropylene copolymer pressure-sensitive adhesive, a styrene/vinyl acetate copolymer pressure-sensitive adhesive, and a styrene/butadiene copolymer pressure-sensitive adhesive.
Claim 15
Dependent Claim
22 words
The pressure-sensitive adhesive structure according to claim 1, wherein said pressure-sensitive adhesive layer comprises a silicone pressure-sensitive adhesive mainly composed of dimethylpolysiloxane.
Claim 16
Dependent Claim
52 words
The pressure-sensitive adhesive structure according to claim 1, wherein said substrate layer has a thickness of from about 0.01 to 10 mm, said pressure-sensitive adhesive layer has a thickness of about 10 to about 300 micrometers, and said release agent layer has a thickness of from about 0.1 to about 50 micrometers.
Claim 17
Dependent Claim
194 words
The pressure-sensitive adhesive structure according to claim 1, wherein Component (b) in said fluorosilicone composition is represented by Formula (13): ##STR26## wherein R 3 represents a hydrogen atom, a C 1 to C 8 alkyl group or a phenyl group; R 4 may be the same or different and represents a C 1 to C 8 alkyl group, a phenyl group, or at least one selected from the group consisting of the fluorine-containing substituents of Formulas (1) to (4) and Formula (14): ##STR27## where n is an integer of 1 to 5, ##STR28## where n is an integer of 1 to 5, C.sub.m F.sub.2m+1 CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 CH.sub.2 --(3) where m is an integer of 3 to 10, C.sub.m F.sub.2m+1 CH.sub.2 OCH.sub.2 CH.sub.2 CH.sub.2 -- (4) where m is an integer of 3 to 10, R.sup.5 CH.sub.2 CH.sub.2 -- (14) wherein R 5 represents a C 1 to C 8 perfluoroalkyl group; and x is an integer of 1 or more, and y is an integer of 0 or more, provided that x is a number that makes the number of the silicon-bonded hydrogen atoms in the molecule come to 3 or more.
Claim 18
Dependent Claim
96 words
The pressure-sensitive adhesive structure according to claim 1, wherein at least 3 mol % of the whole silicon-bonded organic groups in Component (b) is selected from the fluorine-containing substituents of Formula (1) to (4) and (14): ##STR29## where n is an integer of 1 to 5, ##STR30## where n is an integer of 1 to 5, C.sub.m F.sub.2m+1 CH.sub.2 CH.sub.2 OCH.sub.2 CH .sub.2 CH.sub.2 --(3) where m is an integer of 3 to 10, C.sub.m F.sub.2m+1 CH.sub.2 OCH.sub.2 CH.sub.2 CH.sub.2 -- (4) where m is an integer of 3 to 10, R.sup.5 CH.sub.2 CH.sub.2 -- (14).
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1994-12-16 | 1995-06-17 | 1995-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-16 | 1999-06-17 | 1999-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-16 | 2003-06-17 | 2003-12-17 | $7700.00 | Window Closed / Lapsed |