US5254644A
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Silicone self-adhesive composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1992-05-08
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Granted: 1993-10-19
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Expires: 2012-05-08
Abstract
Abstract A silicone self-adhesive composition is comprised of (A) high viscosity organopolysiloxane raw rubber, (B) MQ resin, (C) organohydrogenpolysiloxane, (D) platinum catalyst, and (E) high vinyl content organopolysiloxane. It cures at relatively low temperature into an adhesive layer which has good adhesive properties and heat resistance, finding use as heat resistant adhesive tapes and labels.
Inventors
- 👤 Takahide Kobori
- 👤 Isamu Moriizumi
- 👤 Mitsuhiro Takarada
- 👤 Kenichi Isobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:18
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/08; C08L; C08L83/00; C09; C09J; C09J183/00; C09J183/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
240 words
A silicone self-adhesive composition comprising (A) 100 parts by weight of at least one organopolysiloxane selected from the group consisting of organopolysiloxanes of the following general formula (1) and (2): ##STR7## wherein R is a monovalent hydrocarbon group excluding alkenyl, letter n is an integer of from 0 to 3, k and m each are 0 or a positive integer, with the proviso that m is an integer of at least 2 when n is 0, and j and l each are an integer of at least 2,000, (B) about 100 to 250 parts by weight of an organopolysiloxane comprising R 3 1 SiO 1/2 and SiO 2 units wherein R 1 is a monovalenthydrocarbon gropu or a hydroxyl group, the molar ratio of R 3 1 1SiO 1/2 unit to SiO2 unit being in the range of from 0.5 to 1.2, (C) an organohydrogenpolysiloxane containing at least two hydrogen atoms attached to silicon atoms in a molecule, in an amount such that the ratio of the total molar number of hydrogen atoms in component (C) and the total molar number of vinyl groups in components (A) and (E) is 0.1 to 5, (D) a catalytic amount of a platinum catalyst, and (E) an organopolysiloxane of the following general formula (3); ##STR8## wherein R and n are as defined above, p is an integer of from 0 to 1,000, q is an integer of from 10 to 1,000, and 0≦p/q≦1.
Claim 2
Dependent Claim
240 words
A silicone self-adhesive composition comprising (A) 100 parts by weight of at least one organopolysiloxane selected from the group consisting of organopolysiloxanes of the following general formula (1) and (2): ##STR7## wherein R is a monovalent hydrocarbon group excluding alkenyl, letter n is an integer of from 0 to 3, k and m each are 0 or a positive integer, with the proviso that m is an integer of at least 2 when n is 0, and j and l each are an integer of at least 2,000, (B) about 100 to 250 parts by weight of an organopolysiloxane comprising R 3 1 SiO 1/2 and SiO 2 units wherein R 1 is a monovalenthydrocarbon gropu or a hydroxyl group, the molar ratio of R 3 1 1SiO 1/2 unit to SiO2 unit being in the range of from 0.5 to 1.2, (C) an organohydrogenpolysiloxane containing at least two hydrogen atoms attached to silicon atoms in a molecule, in an amount such that the ratio of the total molar number of hydrogen atoms in component (C) and the total molar number of vinyl groups in components (A) and (E) is 0.1 to 5, (D) a catalytic amount of a platinum catalyst, and (E) an organopolysiloxane of the following general formula (3); ##STR8## wherein R and n are as defined above, p is an integer of from 0 to 1,000, q is an integer of from 10 to 1,000, and 0≦p/q≦1.
Claim 3
Dependent Claim
16 words
The composition of claim 1 which contains about 100 to about 200 parts of component (B).
Claim 4
Dependent Claim
43 words
The composition of claim 1 wherein component (C) is added such that the ratio of the total molar number of hydrogen atoms in component (C) and the total molar number of vinyl groups in components (A) and (E) ranges from 0.1 to 5.
Claim 5
Dependent Claim
22 words
The composition of claim 1 which contains 100 parts of component (A) and about 0.2 to about 10 parts of component (E).
Claim 6
Dependent Claim
21 words
The composition of claim 1, wherein 1-5 parts by weight of (E) per 100 parts by weight of (A) are used.
Claim 7
Dependent Claim
21 words
The composition of claim 1, wherein 1-4 parts by weight of (E) per 100 parts by weight of (A) are used.
Claim 8
Dependent Claim
236 words
A silicone self-adhesive composition comprising 100 parts by weight of at least one organopolysiloxane selected from the group consisting of organopolysiloxanes of the following general formulae (1) and (2); ##STR9## wherein R is a monovalent hydrocarbon group excluding alkenyl, letter n is an integer of from 0 to 3, k and m each are 0 or a positive integer, with the proviso that m is an integer of at least 2 when n is 0, and j and l each are an integer of at least 2,000, (B) an organopolysiloxane comprising R 3 1 SiO 1/2 and SiO 2 units wherein R 1 is a monovalenthydrocarbon group or a hydroxyl group, the molar ratio of R 3 1 1SiO 1/2 unit to SiO2 unit being in the range of from 0.5 to 1.2, (C) an organohydrogenpolysiloxane containing at least two hydrogen atoms attached to silicon atoms in a molecule, in an amount such that the ratio of the total molar number of hydrogen atoms in component (C) and the total molar number of vinyl groups in components (A) and (E) is 0.1 to 5, (D) a catalytic amount of a platinum catalyst, and (E) 1-5 parts by weight of an organopolysiloxane of the following general formula (3); ##STR10## wherein R and n are as defined above, p is an integer of from 0 to 1,000, q is an integer of from 10 to 1,000, and 0≦p/q≦1.
Claim 9
Dependent Claim
236 words
A silicone self-adhesive composition comprising 100 parts by weight of at least one organopolysiloxane selected from the group consisting of organopolysiloxanes of the following general formulae (1) and (2); ##STR9## wherein R is a monovalent hydrocarbon group excluding alkenyl, letter n is an integer of from 0 to 3, k and m each are 0 or a positive integer, with the proviso that m is an integer of at least 2 when n is 0, and j and l each are an integer of at least 2,000, (B) an organopolysiloxane comprising R 3 1 SiO 1/2 and SiO 2 units wherein R 1 is a monovalenthydrocarbon group or a hydroxyl group, the molar ratio of R 3 1 1SiO 1/2 unit to SiO2 unit being in the range of from 0.5 to 1.2, (C) an organohydrogenpolysiloxane containing at least two hydrogen atoms attached to silicon atoms in a molecule, in an amount such that the ratio of the total molar number of hydrogen atoms in component (C) and the total molar number of vinyl groups in components (A) and (E) is 0.1 to 5, (D) a catalytic amount of a platinum catalyst, and (E) 1-5 parts by weight of an organopolysiloxane of the following general formula (3); ##STR10## wherein R and n are as defined above, p is an integer of from 0 to 1,000, q is an integer of from 10 to 1,000, and 0≦p/q≦1.
Claim 10
Dependent Claim
21 words
The composition of claim 7, wherein 100-250 parts by weight of (B) per 100 parts by weight of (A) are used.
Claim 11
Dependent Claim
21 words
The composition of claim 7, wherein 100-200 parts by weight of (B) per 100 parts by weight of (A) are used.
Claim 12
Dependent Claim
21 words
The composition of claim 7, wherein 1-4 parts by weight of (E) per 100 parts by weight of (A) are used.
Claim 13
Dependent Claim
21 words
The composition of claim 7, wherein 1-3 parts by weight of (E) per 100 parts by weight of (A) are used.
References Cited (Backward Citations)
US3884866A
Cited
JPS5437907A
Cited
US4766170A
Cited
JPS6322886A
Cited
US5110882A
Cited
US5169727A
Cited
US5082886A
Cited
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