US4500683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive composition
Assignee: Nitto Denko Corp
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Filing: 1984-06-08
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Granted: 1985-02-19
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Expires: 2004-06-08
Abstract
Abstract A pressure-sensitive adhesive composition containing as a polymer component an addition-polymerization polymer of an acryl-based polymer having sticking properties at room temperature and one or more ethylenically unsaturated monomers capable of forming a homo- or co-polymer having a glass transition point of at least 273° K.; the addition-polymerization polymer is prepared by polymerizing one or more ethylenically unsaturated monomers in the presence of the acryl-based polymer; the present pressure-sensitive adhesive composition has high adhesive strength and cohesive strength.
Inventors
- 👤 Yutaka Hori
- 👤 Makoto Sunakawa
- 👤 Kikuo Takayama
- 👤 Naoki Matsuoka
- 👤 Yutaka Moroishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:32
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/003
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
132 words
A pressure-sensitive adhesive composition containing as a polymer component an addition-polymerization polymer of an acrylate or methacrylate polymer having sticking properties at room temperature and one or more ethylenically unsaturated monomers capable of forming a homo- or co-polymer having a glass transition point of at least 273° K., said addition-polymerization polymer being produced by polymerizing one or more ethylenically unsaturated monomers in the presence of the acrylate or methacrylate polymer having sticking properties at room temperature, wherein the ethylenically unsaturated monomer is selected from at least one member of the group consisting of (a) styrene and a styrene derivative, (b) vinyl acetate, (c) acrylonitrile, (d) methacrylonitrile, (e) an acrylate derivative, and (f) a methacrylate derivative, each being capable of forming a homopolymer having a glass transition point of at least 273° K.
Claim 2
Dependent Claim
132 words
A pressure-sensitive adhesive composition containing as a polymer component an addition-polymerization polymer of an acrylate or methacrylate polymer having sticking properties at room temperature and one or more ethylenically unsaturated monomers capable of forming a homo- or co-polymer having a glass transition point of at least 273° K., said addition-polymerization polymer being produced by polymerizing one or more ethylenically unsaturated monomers in the presence of the acrylate or methacrylate polymer having sticking properties at room temperature, wherein the ethylenically unsaturated monomer is selected from at least one member of the group consisting of (a) styrene and a styrene derivative, (b) vinyl acetate, (c) acrylonitrile, (d) methacrylonitrile, (e) an acrylate derivative, and (f) a methacrylate derivative, each being capable of forming a homopolymer having a glass transition point of at least 273° K.
Claim 3
Dependent Claim
105 words
A pressure-sensitive adhesive composition as in claim 1 wherein the ethylenically unsaturated monomer comprises an unsaturated monomer selected from at least one member of the group consisting of styrene, vinyl acetate, acrylonitrile, methacrylonitrile, an acrylate derivative, a methacrylate derivative, and a styrene derivative, each being capable of forming a homopolymer having a glass transition point of at least 273° K., and an unsaturated monomer which is capable of copolymerizing with said ethylenically unsaturated monomer to form a copolymer having a glass transition point of at least 273° K., said latter unsaturated monomer constituting not more than 50% by weight of the total unsaturated monomer weight.
Claim 4
Dependent Claim
26 words
A pressure-sensitive adhesive composition as in claim 2 wherein the latter unsaturated monomer constitutes not more than 30% by weight of the total unsaturated monomer weight.
Claim 5
Dependent Claim
46 words
A pressure-sensitive adhesive composition as in claim 2, or 3 wherein the unsaturated monomer selected from the group consisting of an acrylate derivative, a methacrylate derivative, and a styrene derivative is able to form a homopolymer having a glass transition point of at least 300° K.
Claim 6
Dependent Claim
14 words
A pressure-sensitive adhesive composition as in claim 4 wherein the methacrylate is methyl methacrylate.
Claim 7
Dependent Claim
27 words
A pressure-sensitive adhesive composition as in claim 1, 2 or 3 wherein the acrylate or methacrylate polymer has an average molecular weight of at least about 100,000.
Claim 8
Dependent Claim
37 words
A pressure-sensitive adhesive composition as in claim 1, or 2 wherein the ethylenically unsaturated monomer is used in an amount of from 5 to 200 parts by weight per 100 parts by weight of the acryl-based polymer.
Claim 9
Dependent Claim
40 words
A pressure-sensitive adhesive composition as in claim 1, 2, or 3 wherein the ethylenically unsaturated monomer is added in an amount of from 10 to 150 parts by weight per 100 parts by weight of the acrylate or methacrylate polymer.
Claim 10
Dependent Claim
24 words
A pressure-sensitive adhesive composition as in claim 1, 2, or 3 wherein the addition-polymerization is carried out in the presence of an organic solvent.
Claim 11
Dependent Claim
34 words
A pressure-sensitive adhesive composition as in claim 9 wherein the amount of the organic solvent is from 5 to 900 parts by weight per 100 parts by weight of the acrylate or methacrylate polymer.
Claim 12
Dependent Claim
24 words
A pressure-sensitive adhesive composition as claim 9 wherein the organic solvent is toluene or a mixed solvent containing at least 50% by weight toluene.
Claim 13
Dependent Claim
24 words
A pressure-sensitive adhesive composition as in claim 1, 2, or 3 wherein the addition-polymerization is carried out in the absence of an organic solvent.
Claim 14
Dependent Claim
36 words
A pressure-sensitive adhesive composition as in claim 12 wherein a chain transfer agent is added in an amount of from 0.01 to 1.0 parts by weight per 100 parts by weight of the ethylenically unsaturated monomer.
Claim 15
Dependent Claim
21 words
A pressure-sensitive adhesive composition as in claim 1, 2 or 3 wherein an organic peroxide is used as as polymerization catalyst.
Claim 16
Dependent Claim
45 words
A pressure-sensitive adhesive composition as in claim 1, 2, or 3 wherein a crosslinking agent is added to the polymer component after the addition-polymerization in an amount of 0.001 to 1.5 parts by weight per 100 parts by weight of the acrylate or methacrylate polymer.
Claim 17
Dependent Claim
34 words
A pressure-sensitive adhesive composition as in claim 10 wherein the amount of the organic solvent is from 25 to 400 parts by weight per 100 parts by weight of the acrylate or methacrylate polymer.
Claim 18
Dependent Claim
36 words
A pressure-sensitive adhesive composition as in claim 13 wherein the chain transfer agent is added in an amount of from 0.03 to 0.6 parts by weight per 100 parts by weight of the ethylenically unsaturated monomer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |