US5387450A
Expired / Lapsed
US
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Temperature-activated adhesive assemblies
Assignee: LANDEC LABS Inc A CORP OF
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Filing: 1992-02-27
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Granted: 1995-02-07
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Expires: 2012-02-27
Abstract
Abstract Temperature-activated adhesive compositions formulated with crystallizable polymers are provided. The compositions, which display a rapid transition from the tacky to the nontacky state, and/or from the nontacky to the tacky state, are useful in medical applications, where adhesion of a substrate to the skin is desired, as well as in a variety of nonmedical applications. Temperature-activated adhesive assemblies such as tapes, labels, and the like for use in a number of contexts are provided which assemblies have a moisture vapor transmission rate which is compatible with human skin, e.g., above 500 g/m2/day at 37 DEG C. and a 100% to 10% relative humidity difference.
Inventors
- 👤 Ray F. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:30
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/58; A61L15/585; C09J7/00; C09J7/30; C09J7/35; B; B05; B05B; B05B12/00; B05B12/16; B05B12/20; B05B12/24; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1414; Y10T428/26; Y10T428/269; Y10T428/28; Y10T428/2852; Y10T442/00; Y10T442/20; Y10T442/2738; Y10T442/2746
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
279 words
A temperature-sensitive adhesive assembly which comprises (1) a body member: (2) secured to the body member, a layer of a polymeric composition which (a) comprises 40 to 100% by weight of at least one crystalline polymer which (i) begins to melt at a temperature T 0 , where T 0 is 5° to 50° C., (ii) completes melting at a peak melting temperature T m which is at most (T 0 +15)° C., and (iii) is a side-chain crystallizable polymer which has a heat of fusion of at least 20 Joules/g and contains at least 50% by weight of repeating units of the formula ##STR3## wherein M is an atom forming part of the backbone of the polymer S is a spacer unit, and C is a crystallizable group, (b) has an ASTM D2979 tack value of less than 25 g.cm/sec at a temperature below T 0 , and (c) has an ASTM D2979 tack value of at least about 100 g.cm/sec over a range of temperatures above T m ; said assembly having one or more of the following characteristics I to VI: I. the layer of polymeric composition has a thickness of at least 0.001 inch: II. the crystalline polymer contains units derived from at least two monomers; III. the crystalline polymer has been crosslinked: IV. the polymeric composition comprises at least two polymers; V. the body member is a woven fabric, a non-woven fabric, paper, wood, metal, glass, a medical immobilization device, an electrode, a surgical dressing, or a transdermal drug delivery patch; and VI. the assembly further comprises (3) a release layer which covers the surface of the polymeric composition remote from the body member.
Claim 2
Dependent Claim
279 words
A temperature-sensitive adhesive assembly which comprises (1) a body member: (2) secured to the body member, a layer of a polymeric composition which (a) comprises 40 to 100% by weight of at least one crystalline polymer which (i) begins to melt at a temperature T 0 , where T 0 is 5° to 50° C., (ii) completes melting at a peak melting temperature T m which is at most (T 0 +15)° C., and (iii) is a side-chain crystallizable polymer which has a heat of fusion of at least 20 Joules/g and contains at least 50% by weight of repeating units of the formula ##STR3## wherein M is an atom forming part of the backbone of the polymer S is a spacer unit, and C is a crystallizable group, (b) has an ASTM D2979 tack value of less than 25 g.cm/sec at a temperature below T 0 , and (c) has an ASTM D2979 tack value of at least about 100 g.cm/sec over a range of temperatures above T m ; said assembly having one or more of the following characteristics I to VI: I. the layer of polymeric composition has a thickness of at least 0.001 inch: II. the crystalline polymer contains units derived from at least two monomers; III. the crystalline polymer has been crosslinked: IV. the polymeric composition comprises at least two polymers; V. the body member is a woven fabric, a non-woven fabric, paper, wood, metal, glass, a medical immobilization device, an electrode, a surgical dressing, or a transdermal drug delivery patch; and VI. the assembly further comprises (3) a release layer which covers the surface of the polymeric composition remote from the body member.
Claim 3
Dependent Claim
31 words
An assembly according to claim 1 wherein said repeating units are derived from at least one n-alkyl acrylate or methacrylate in which the alkyl group contains 14 to 22 carbon atoms.
Claim 4
Dependent Claim
21 words
An assembly according to claim 1 wherein the polymer contains 1 to 10% by weight of units derived from acrylic acid.
Claim 5
Dependent Claim
44 words
An assembly according to claim 1 wherein the polymer includes repeating units derived from the group consisting of acrylic acid, hydroxyethylacrylate, acrylamide, methacrylamide, methacrylic acid, linear or branched alkyl acrylates and methacrylates in which the alkyl group is not crystallizable, styrene and substituted styrenes.
Claim 6
Dependent Claim
27 words
An assembly according to claim 1 wherein the side-chain crystallizable polymer contains units derived from at least one polar monomer selected from polyoxalkylenes, acrylates, acrylamides, and methacrylamides.
Claim 7
Dependent Claim
20 words
An assembly according to claim 1 wherein the layer of polymeric composition has a thickness of at least 0.001 inch.
Claim 8
Dependent Claim
13 words
An assembly according to claim 1 wherein the crystalline polymer has been crosslinked.
Claim 9
Dependent Claim
15 words
An assembly according to claim 1 wherein the polymeric, composition comprises at least two polymers.
Claim 10
Dependent Claim
36 words
An assembly according to claim 1 wherein the body member is a woven fabric, a non-woven fabric, paper, wood, metal, glass, a medical immobilization device, an electrode, a surgical dressing, or a transdermal drug delivery patch.
Claim 11
Dependent Claim
24 words
An assembly according to claim 1 further comprising a release layer which covers the surface of the polymeric composition remote from the body member.
Claim 12
Dependent Claim
14 words
An assembly according to claim 1 wherein the body member is a polymeric film.
Claim 13
Dependent Claim
24 words
An assembly according to claim 1 wherein the polymeric composition has an ASTM D2979 tack value of less than 25 g.cm/sec at 25° C.
Claim 14
Dependent Claim
12 words
An assembly according to claim 1 wherein T 0 is 20°-35° C.
Claim 15
Dependent Claim
12 words
An assembly according to claim 1 wherein T 0 is 25°-30° C.
Claim 16
Dependent Claim
16 words
An assembly according to claim 1 wherein T m is at most (T 0 +10)° C.
Claim 17
Dependent Claim
16 words
An assembly according to claim 1 wherein T m is at most (T 0 +5)° C.
Claim 18
Dependent Claim
19 words
An assembly according to claim 1 wherein the polymeric composition has a crystallization temperature of 15° to 25° C.
Claim 19
Dependent Claim
13 words
An assembly according to claim 1 wherein the crystalline polymer has been crosslinked.
Claim 20
Dependent Claim
16 words
An assembly according to claim 1 wherein the polymeric composition also contains a conventional pressure-sensitive adhesive.
Claim 21
Dependent Claim
14 words
An assembly according to claim 1 wherein the body member is a flexible backing.
Claim 22
Dependent Claim
11 words
An assembly according to claim 1 which is a surgical drape.
Claim 23
Dependent Claim
10 words
An assembly according to claim 1 which is a label.
Claim 24
Dependent Claim
33 words
An assembly according to claim 1 wherein the layer of polymeric composition is substantially non-tacky at temperatures below T 0 and rapidly becomes tacky when heated to a temperature of T m .
Claim 25
Dependent Claim
22 words
An assembly according to claim 1 which is substantially non-tacky at room temperature and rapidly becomes tacky when pressed against human skin.
Claim 26
Dependent Claim
119 words
A temperature-sensitive adhesive assembly which comprises (1) a body member; (2) secured to the body member, a layer of a polymeric composition which (a) comprises 40 to 100% by weight of at least one crystalline polymer which (i) begins to melt at a temperature T 0 , where T 0 is 5° to 50° C., (ii) completes melting at a peak melting temperature T m which is at most (T 0 +15)° C., and (iii) is polytetrahydrofuran, (b) has an ASTM D2979 tack value of less than 25 g.cm/sec at a temperature below T 0 , and (c) has an ASTM D2979 tack value of at least about 100 g.cm/sec over a range of temperatures above T m .
Claim 27
Dependent Claim
119 words
A temperature-sensitive adhesive assembly which comprises (1) a body member; (2) secured to the body member, a layer of a polymeric composition which (a) comprises 40 to 100% by weight of at least one crystalline polymer which (i) begins to melt at a temperature T 0 , where T 0 is 5° to 50° C., (ii) completes melting at a peak melting temperature T m which is at most (T 0 +15)° C., and (iii) is polytetrahydrofuran, (b) has an ASTM D2979 tack value of less than 25 g.cm/sec at a temperature below T 0 , and (c) has an ASTM D2979 tack value of at least about 100 g.cm/sec over a range of temperatures above T m .
Claim 28
Dependent Claim
33 words
An assembly according to claim 25 wherein the layer of polymeric composition is substantially non-tacky at temperatures below T 0 and rapidly becomes tacky when heated to a temperature of T m .
Claim 29
Dependent Claim
22 words
An assembly according to claim 25 which is substantially non-tacky at room temperature and rapidly becomes tacky when pressed against human skin.
Claim 30
Dependent Claim
20 words
An assembly according to claim 25 wherein the layer of polymeric composition has a thickness of at least 0.001 inch.
Claim 31
Dependent Claim
36 words
An assembly according to claim 25 wherein the body member is a woven fabric, a non-woven fabric, paper, wood, metal, glass, a medical immobilization device, an electrode, a surgical dressing, or a transdermal drug delivery patch.
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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) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-06 | 2002-08-08 | 2003-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-06 | 2006-08-08 | 2007-02-07 | $7700.00 | Window Closed / Lapsed |