Temperature-activated adhesive assemblies
First Claim
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1. 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 T0, where T0 is 5°
to 50°
C., (ii) completes melting at a peak melting temperature Tm which is at most (T0 +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 polymerS is a spacer unit, andC is a crystallizable group,(b) has an ASTM D2979 tack value of less than 25 g.cm/sec at a temperature below T0, and(c) has an ASTM D2979 tack value of at least about 100 g.cm/sec over a range of temperatures above Tm ;
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.
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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° C. and a 100% to 10% relative humidity difference.
245 Citations
29 Claims
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1. 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 T0, where T0 is 5°
to 50°
C., (ii) completes melting at a peak melting temperature Tm which is at most (T0 +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 polymerS 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 T0, and (c) has an ASTM D2979 tack value of at least about 100 g.cm/sec over a range of temperatures above Tm ; 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. 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 T0, where T0 is 5°
to 50°
C., (ii) completes melting at a peak melting temperature Tm which is at most (T0 +15)°
C., and (iii) is polytetrahydrofuran,(b) has an ASTM D2979 tack value of less than 25 g.cm/sec at a temperature below T0, and (c) has an ASTM D2979 tack value of at least about 100 g.cm/sec over a range of temperatures above Tm. - View Dependent Claims (26, 27, 28, 29)
Specification
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Current AssigneeLandec Labs Incorporated
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Original AssigneeLandec Corporation
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InventorsStewart, Ray F.
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Primary Examiner(s)Davis, Jenna L.
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Application NumberUS07/842,873Time in Patent Office1,076 DaysField of Search428/343, 428/355, 428/349, 428/40, 428/261, 428/339US Class Current428/40.4CPC Class CodesA61L 15/585 Mixtures of macromolecular ...B05B 12/24 made at least partly of fle...C08L 33/04 Homopolymers or copolymers ...C09J 133/06 of esters containing only c...C09J 7/35 Heat-activatedY10T 428/1414 Ceramic, glass, glasslike, ...Y10T 428/269 including synthetic resin o...Y10T 428/2852 Adhesive compositionsY10T 442/2746 Heat-activatable adhesive
