US4818610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unified pressure-sensitive adhesive tape
Assignee: 3M Co
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Filing: 1987-08-17
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Granted: 1989-04-04
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Expires: 2007-08-17
Abstract
Abstract A pressure-sensitive adhesive tape comprising a plurality of superimposed layers, at least one outer layer being a pressure-sensitive adhesive layer, contiguous layers defining an interface therebetween, each of the layers comprising a photopolymerized matrix of polymeric chains; the polymeric chains extending from the matrix of one of the layers through the interface into the matrix of a contiguous layer; the polymeric chains comprising polymerized monomers having migrated from the matrix of each contiguous layer prior to polymerization, whereby the layers cannot be delaminated.
Inventors
- 👤 Patrick G. Zimmerman
- 👤 Gordon G. Johnson
- 👤 Susan L. Korpela
- 👤 Caroline L. Vernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:06
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/30; C09J7/38; C09J2301/00; C09J2301/20; C09J2301/208; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2809; Y10T428/2848; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
106 words
A pressure-sensitive adhesive tape comprising a plurality of superimposed layers, contiguous layers comprising differing acrylic compositions, said layers having been simultaneously photopolymerized, at least one outer layer being an acrylic pressure-sensitive adhesive layer, said layer comprising at least one alkyl acrylate ester of a nontertiary alkyl alcohol, and a photoinitiator, contiguous layers defining an interface therebetween, each of said layers comprising a photopolymerized matrix of polymeric chains; said polymeric chains extending through said interface into the matrix of a contiguous layer; said polymeric chains comprising polymerized monomers having migrated from the matrix of each contiguous layer prior to polymerization, whereby said contiguous layers cannot be delaminated.
Claim 2
Dependent Claim
106 words
A pressure-sensitive adhesive tape comprising a plurality of superimposed layers, contiguous layers comprising differing acrylic compositions, said layers having been simultaneously photopolymerized, at least one outer layer being an acrylic pressure-sensitive adhesive layer, said layer comprising at least one alkyl acrylate ester of a nontertiary alkyl alcohol, and a photoinitiator, contiguous layers defining an interface therebetween, each of said layers comprising a photopolymerized matrix of polymeric chains; said polymeric chains extending through said interface into the matrix of a contiguous layer; said polymeric chains comprising polymerized monomers having migrated from the matrix of each contiguous layer prior to polymerization, whereby said contiguous layers cannot be delaminated.
Claim 3
Dependent Claim
21 words
A pressure-sensitive adhesive tape according to claim 1 wherein the pressure-sensitive adhesive layer further comprises at least one polar copolymerizable monomer.
Claim 4
Dependent Claim
46 words
A pressure-sensitive adhesive tape according to claim 2 wherein said adhesive copolymer comprises (a) from about 40% to about 80% isooctyl acrylate; and (b) from about 20% to about 60% of a polar copolymerizable monomer selected from the group consisting of N-vinyl pyrrolidone and acrylic acid.
Claim 5
Dependent Claim
28 words
A pressure-sensitive adhesive tape according to claim 1 wherein said superimposed layers include an outer pressure-sensitive adhesive layer and at least one layer of substantially non-tacky polymeric material.
Claim 6
Dependent Claim
55 words
A pressure-sensitive adhesive tape according to claim 4 wherein said substantially non-tacky polymeric material comprises photopolymerized polymeric matrix selected from the group consisting of polymers of multifunctional acrylates and copolymers of monomers comprising acrylic acid esters of non-tertiary alkyl alcohol having from 1 to about 14 carbon atoms and at least one polar copolymerizable monomer.
Claim 7
Dependent Claim
63 words
A pressure-sensitive adhesive tape according to claim 5 wherein said substantially non-tacky polymeric material comprises at least one copolymer of monomers comprising (a) from about 40% to about 80% of acrylic acid ester of non-tertiary alcohol, the molecules of which have from 1 to about 14 carbon atoms; and (b) from about 20% to about 60% of at least one polar copolymerizable monomer.
Claim 8
Dependent Claim
35 words
A pressure-sensitive adhesive tape according to claim 1 wherein at least one of said layers further comprise from about 5% to about 65% volume percent microbubbles having a specific gravity of no more than 1.0.
Claim 9
Dependent Claim
17 words
A pressure-sensitive adhesive tape according to claim 1 wherein each outer layer is a pressure-sensitive adhesive layer.
Claim 10
Dependent Claim
83 words
A pressure-sensitive adhesive tape according to claim 8 having outer layers comprised of photopolymerized polymeric pressure-sensitive adhesive and at least one intermediate layer photopolymerized non-tacky polymeric material, wherein each of said layers comprises a copolymer of monomers comprising: (a) a major proportion of an acrylic acid ester of non-tertiary alkyl alcohol, the molecules of which have from 1 to 14 carbon atoms; and (b) a minor proportion of a polar copolymerizable monomer selected from the group consisting of N-vinyl pyrrolidone and acrylic acid.
Claim 11
Dependent Claim
34 words
A pressure-sensitive adhesive tape according to claim 8 wherein each of said pressure-sensitive adhesive outer layers comprises a copolymer having at least one photopolymerizable monomer not present in the other pressure-sensitive adhesive outer layer.
Claim 12
Dependent Claim
41 words
A pressure-sensitive adhesive tape according to claim 9 wherein the polar copolymerizable monomer (b) in one of said pressure-sensitive adhesive layers is acrylic acid, and the polar copolymerizable monomer (b) in the other of said pressure-sensitive adhesive layer is N-vinyl pyrrolidone.
Claim 13
Dependent Claim
38 words
A pressure-sensitive adhesive tape according to claim 9 wherein said layer photopolymerized to a non-tacky polymeric material further compriss from about 5% by volume to about 65% by volume microbubbles having a specific gravity of 1.0 or less.
Claim 14
Dependent Claim
13 words
A unified pressure-sensitive adhesive tape according to claim 1 further comprising a scrim.
Claim 15
Dependent Claim
13 words
A unified pressure-sensitive adhesive according to claim 13 wherein said scrim is non-woven.
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |