Patent US2669919A successfully refreshed from Google Patents.
US5334686A
Expired / Lapsed
US
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Pressure-sensitive adhesive and adhesive sheets using the same
Assignee: Nitto Denko Corp
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Filing: 1993-11-30
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Granted: 1994-08-02
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Expires: 2013-11-30
Abstract
Abstract A pressure-sensitive adhesive and adhesive sheets using the pressure-sensitive adhesive are disclosed. The pressure-sensitive adhesive comprising (a) from 50 to 84% by weight of an acrylic monomer, (b) from 15 to 28% by weight of an N,N-di-substituted (meth)acrylamide, (c) from 1 to 10% by weight of a monomer having an acid group, and (d) from 0 to 25% by weight of other monomer copolmerizable with the components (a) to (c).
Inventors
- 👤 Masahiko Ando
- 👤 Takeshi Yamanaka
- 👤 Yutaka Moroishi
- 👤 Yasuyuki Tokunaga
- 👤 Yoshinao Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:01
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/062; C09J133/064; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1808; C08F220/1809; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
149 words
A pressure-sensitive adhesive comprising an acrylic polymer comprising the following components (a) to (d); (a) from 50 to 84% by weight of an acrylic monomer represented by formula (1); CH.sub.2 --C(R.sup.1)COO--R.sup.2 ( 1) wherein R 1 represents hydrogen or methyl and R 2 represents an alkyl group having from 4 to 14 carbon atoms, (b) from 15 to 28% by weight of an N,N-di-substituted (meth)acrylamide represented by formula (2); ##STR2## wherein R 3 represents hydrogen or methyl and R 4 and R 5 represent an alkyl group or organic groups which combine with each other to form a heterocyclic ring with the N atom, (c) from 1 to 10% by weight of a monomer having an acid group, and (d) from 0 to 25% by weight of other monomer copolymerizable with the components (a) to (c), the total amount of the components (a) to (d) being 100% by weight.
Claim 2
Dependent Claim
149 words
A pressure-sensitive adhesive comprising an acrylic polymer comprising the following components (a) to (d); (a) from 50 to 84% by weight of an acrylic monomer represented by formula (1); CH.sub.2 --C(R.sup.1)COO--R.sup.2 ( 1) wherein R 1 represents hydrogen or methyl and R 2 represents an alkyl group having from 4 to 14 carbon atoms, (b) from 15 to 28% by weight of an N,N-di-substituted (meth)acrylamide represented by formula (2); ##STR2## wherein R 3 represents hydrogen or methyl and R 4 and R 5 represent an alkyl group or organic groups which combine with each other to form a heterocyclic ring with the N atom, (c) from 1 to 10% by weight of a monomer having an acid group, and (d) from 0 to 25% by weight of other monomer copolymerizable with the components (a) to (c), the total amount of the components (a) to (d) being 100% by weight.
Claim 3
Dependent Claim
20 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the acrylic monomer is acrylic acid esters or methacrylic acid esters.
Claim 4
Dependent Claim
22 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the amount of the acrylic monomer is from 60 to 80% by weight.
Claim 5
Dependent Claim
33 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the N,N-di-substituted (meth)acrylamide is at least one member selected from the group consisting of N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, N,N-dibutyl(meth)acrylamide, N-(meth)acryloylmorpholine, N-(meth)acryloylpyrrolidine, N-(meth)acryloylpyrrolidine, N-(meth)acryloylpiperidine, N-(meth)acryloylpyrrolidine, and N-(meth)acryloyl-4-piperidine.
Claim 6
Dependent Claim
22 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the amount of the N,N-di-substituted (meth)acrylamide is from 16 to 25% by weight.
Claim 7
Dependent Claim
22 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the amount of the N,N-di-substituted (meth)acrylamide is from 17 to 24% by weight.
Claim 8
Dependent Claim
37 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the monomer containing an acid group is at least one member selected from the group consisting of carboxyl group-containing monomers, sulfonic acid group-containing monomers, and phosphoric acid-containing monomers.
Claim 9
Dependent Claim
25 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the amount of the monomer containing an acid group is from 2 to 8% by weight.
Claim 10
Dependent Claim
25 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the amount of the monomer containing an acid group is from 3 to 7% by weight.
Claim 11
Dependent Claim
40 words
A pressure-sensitive adhesive as claimed in claim 1, wherein the other monomer is at least one member selected from the group consisting of vinyl acetate, styrene, glycidyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, and N-vinylpyrrolidone.
Claim 12
Dependent Claim
25 words
An adhesive sheet comprising a support having a layer of the pressure-sensitive adhesive as claimed in claim 1 on one surface or both surfaces thereof.
References Cited (Backward Citations)
GB962109A
Cited
GB899342A
Cited
DE1195050B
Cited
GB1072331A
Cited
DE1271399B
Cited
US3936513A
Cited
US4067839A
Cited
US4259465A
Cited
US4388436A
Cited
US4548990A
Cited
JPS60250015A
Cited
US4625009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |