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Patent US4599265A successfully refreshed from Google Patents.
US4599265A
Expired / Lapsed
US
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Removable pressure-sensitive adhesive tape
Assignee: 3M Co
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Filing: 1985-02-13
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Granted: 1986-07-08
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Expires: 2005-02-13
Abstract
Abstract A roll of pressure-sensitive adhesive tape, the adhesive layer of which is an alkyl acrylate polymer which is low-tack and yet sufficiently tacky to adhere reliably to ordinary substrates but, by virtue of being crosslinked and nearly free from polar substituents, it is readily peelable from those substrates after prolonged dwell.
Inventors
- 👤 Donald L. Esmay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:19
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C09J2301/00; C09J2301/10; C09J2301/12; C09J2301/124; C09J2301/30; C09J2301/302; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/28; Y10T428/2804; Y10T428/2809; Y10T428/2848; Y10T428/2852; Y10T428/2857; Y10T428/2861; Y10T428/2878; Y10T428/2887; Y10T428/2891; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
130 words
Pressure-sensitive adhesive tape comprising a flexible carrier web and a pressure-sensitive adhesive layer comprising a polymer of one or more monomers which are predominantly alkyl acrylate, the alkyl groups of which have an average of 8-12 carbon atoms, and are nearly free from any polar copolymerizable monomer, wherein up to 3 mol percent of said polar copolymerizable monomers comprise strongly polar copolymerizable monomer and up to 15 mol percent of said polar copolymerizable monomers comprise moderately polar copolymerizable monomer, said adhesive layer being crosslinked to provide a 180° peelback value from glass within the range of 5 to 30 N/dm immediately after being applied, which value does not increase more than 20% after 30 days dwell at 22° C., thus assuring both reliable adhesion and clean peelability after prolonged dwell.
Claim 2
Dependent Claim
130 words
Pressure-sensitive adhesive tape comprising a flexible carrier web and a pressure-sensitive adhesive layer comprising a polymer of one or more monomers which are predominantly alkyl acrylate, the alkyl groups of which have an average of 8-12 carbon atoms, and are nearly free from any polar copolymerizable monomer, wherein up to 3 mol percent of said polar copolymerizable monomers comprise strongly polar copolymerizable monomer and up to 15 mol percent of said polar copolymerizable monomers comprise moderately polar copolymerizable monomer, said adhesive layer being crosslinked to provide a 180° peelback value from glass within the range of 5 to 30 N/dm immediately after being applied, which value does not increase more than 20% after 30 days dwell at 22° C., thus assuring both reliable adhesion and clean peelability after prolonged dwell.
Claim 3
Dependent Claim
17 words
Pressure-sensitive adhesive tape as defined in claim 1 wherein the strongly polar copolymerizable monomer is acrylic acid.
Claim 4
Dependent Claim
18 words
Pressure-sensitive adhesive tape as defined in claim 2 wherein the moderately polar copolymerizable monomer was acrylonitrile or N-vinyl-2-pyrrolidone.
Claim 5
Dependent Claim
27 words
Pressure-sensitive adhesive tape as defined in claim 1 having a second pressure-sensitive adhesive layer as defined in claim 1 on the other face of the carrier web.
Claim 6
Dependent Claim
16 words
Pressure-sensitive adhesive tape as defined in claim 4 wherein the two pressure-sensitive adhesive layers are identical.
Claim 7
Dependent Claim
30 words
Pressure-sensitive adhesive tape as defined in claim 4 which is wound upon itself in roll form and can be unwound after prolonged storage without any delamination or transfer of adhesive.
Claim 8
Dependent Claim
23 words
Pressure-sensitive adhesive tape as defined in claim 1 having an ordinary aggressively pressure-sensitive adhesive layer on the other face of the carrier web.
Claim 9
Dependent Claim
30 words
Pressure-sensitive adhesive tape as defined in claim 7 which is wound upon itself in roll form and can be unwound after prolonged storage without any delamination or transfer of adhesive.
Claim 10
Dependent Claim
27 words
Pressure-sensitive adhesive tape as defined in claim 1 having a 180° peelback value from glass within the range of 10 to 20 N/dm immediately after being applied.
Claim 11
Dependent Claim
11 words
A roll of pressure-sensitive adhesive tape as defined in claim 1.
Claim 12
Dependent Claim
20 words
Pressure-sensitive adhesive tape as defined in claim 1 wherein said alkyl group of said alkyl acrylate has 8 carbon atoms.
Claim 13
Dependent Claim
86 words
Pressure-sensitive adhesive tape comprising a flexible carrier web and a pressure-sensitive adhesive layer comprising a polymer of one or more monomers which are predominantly isooctyl acrylate, and are nearly free from any polar copolymerizable monomer, said adhesive layer being crosslinked to provide a 180° peelback value from glass within the range of 5 to 30 N/dm immediately after being applied, which value does not increase more than 20% after 30 days dwell at 22° C., thus assuring both reliable adhesion and clean peelability after prolonged dwell.
Claim 14
Dependent Claim
86 words
Pressure-sensitive adhesive tape comprising a flexible carrier web and a pressure-sensitive adhesive layer comprising a polymer of one or more monomers which are predominantly isooctyl acrylate, and are nearly free from any polar copolymerizable monomer, said adhesive layer being crosslinked to provide a 180° peelback value from glass within the range of 5 to 30 N/dm immediately after being applied, which value does not increase more than 20% after 30 days dwell at 22° C., thus assuring both reliable adhesion and clean peelability after prolonged dwell.
References Cited (Backward Citations)
US4364972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |