Debondable adhesive article and methods of making and using the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-007/12
B32B-003/18
C09J-005/06
C09J-007/02
B32B-005/18
B32B-038/10
G09F-007/18
출원번호
US-0233398
(2012-07-19)
등록번호
US-9821529
(2017-11-21)
국제출원번호
PCT/US2012/047274
(2012-07-19)
§371/§102 date
20140117
(20140117)
국제공개번호
WO2013/012973
(2013-01-24)
발명자
/ 주소
Rule, Joseph D.
Behling, Ross E.
Lee, Nicholas A.
LeBow, Leslie M.
출원인 / 주소
3M Innovative Properties Company
대리인 / 주소
Bern, Steven A.
인용정보
피인용 횟수 :
0인용 특허 :
24
초록▼
A heat-debondable adhesive article having two opposing sides is provided that includes a shape-memory polymer sheet in its temporary strained shape that includes a plurality of slits therein and a first adhesive on one opposing side of the polymer sheet and a second adhesive on the other opposing si
A heat-debondable adhesive article having two opposing sides is provided that includes a shape-memory polymer sheet in its temporary strained shape that includes a plurality of slits therein and a first adhesive on one opposing side of the polymer sheet and a second adhesive on the other opposing side of the polymer sheet. The provided article, optionally, includes a first substrate in contact with the first adhesive and a second substrate in contact with the second adhesive. The article can be debonded by heating the article to a temperature equal to or greater than a transition temperature for the shape-memory polymer sheet.
대표청구항▼
1. A heat-debondable adhesive article comprising: a shape-memory polymer sheet comprising polyethylene with an area having a strained temporary shape and an intrinsic shape, first and second opposing surfaces, and comprising a plurality of slits each having a width therein, and wherein the plurality
1. A heat-debondable adhesive article comprising: a shape-memory polymer sheet comprising polyethylene with an area having a strained temporary shape and an intrinsic shape, first and second opposing surfaces, and comprising a plurality of slits each having a width therein, and wherein the plurality of slits defines a total slit length, wherein the first opposing surface of the shape-memory polymer sheet is functionalized by corona treatment or treatment with a chemical primer, wherein if heated to a temperature below 80° C., the shape-memory polymer sheet does not undergo a substantial change in length, and wherein if heated to or above a transition temperature range, the shape-memory polymer sheet at least partially converts from its strained temporary shape to its intrinsic shape;a first adhesive layer having a first thickness and first and second opposing surfaces, wherein the first adhesive layer comprises a foamed adhesive, and wherein a substantial portion of the first opposing surface of the first adhesive layer is disposed upon a substantial portion of the first opposing surface of the shape-memory polymer sheet in its strained temporary shape; and a second adhesive layer having a second thickness, first and second opposing sides, wherein a substantial portion of the first opposing side of the second adhesive layer is disposed upon a substantial portion of the second opposing side of the shape-memory polymer sheet in its strained temporary shape,wherein the shape-memory polymer sheet in its intrinsic shape debonds from the first adhesive layer. 2. A heat-debondable adhesive article according to claim 1, wherein the shape-memory polymer sheet is biaxially oriented and has a maximum shrink tension in one direction. 3. A heat-debondable adhesive article according to claim 1, wherein the ratio of the total length of the plurality of slits to the area of the shape-memory polymer sheet is greater than about 0.35 cm/cm2. 4. A heat-debondable adhesive article according to claim 1, wherein the width of each of the slits in the plurality of slits is less than the thickness of the first adhesive layer. 5. A heat-debondable adhesive article according to claim 1, wherein the shape-memory polymer sheet comprises physical crosslinks. 6. A heat-debondable adhesive article according to claim 5, wherein the shape-memory polymer sheet comprises thermoplastic urethanes or linear, high molecular weight polynorbornene. 7. A heat-debondable adhesive article according to claim 1, wherein the shape-memory polymer sheet comprises covalent crosslinks. 8. A heat-debondable adhesive article according to claim 7, wherein the shape-memory polymer sheet comprises epoxies, thermoset urethanes, acrylates, styrenic polymers, crosslinked olefins, or crosslinked ring-opening metathesis polymers. 9. A heat-debondable adhesive article according to claim 1, wherein the plurality of slits divides the shape-memory polymer sheet into two or more pieces. 10. A heat-debondable adhesive article according to claim 9, wherein the plurality of slits comprises a cross-hatch pattern. 11. A heat-debondable adhesive article according to claim 1, wherein at least one of the first adhesive layer and the second adhesive layer comprise a pressure-sensitive adhesive. 12. A heat-debondable adhesive article according to claim 11, wherein the pressure-sensitive adhesive is selected from an acrylic adhesive, a block copolymer adhesive, a polyurethane adhesive, and a sulfonated polyurethane adhesive. 13. A heat-debondable adhesive article according to claim 2, wherein there is a temperature at which the shrink tension of the shape-memory polymer is sufficiently high to cause a substantial change in the area of the shaped-memory polymer sheet. 14. A heat-debondable adhesive article according to claim 1, wherein upon heating to a transition temperature, the shape-memory polymer sheet converts to its intrinsic shape such that the first adhesive layer is now disposed upon less than about 65% of the surface of the first substrate. 15. A heat-debondable adhesive article according to claim 1, further comprising: a first substrate having a surface in contact with a substantial portion of e second opposing surface of the first adhesive layer. 16. A heat-debondable adhesive article according to claim 15, further comprising: a second substrate in contact with a substantial portion of the second opposing side of the second adhesive. 17. A heat-debondable adhesive article according to claim 1, further comprising an energy absorbing layer. 18. The heat-debondable adhesive article of claim 1 wherein the first adhesive layer or the second adhesive layer comprises a plurality of slits each having a width therein, and wherein the plurality of slits in the first adhesive layer or the second adhesive layer together with the plurality of slits in the shape-memory polymer sheet define a total slit length. 19. The heat-debondable adhesive article of claim 1 wherein the shape-memory polymer sheet in the intrinsic shape does not debond from the second adhesive layer. 20. The heat-debondable adhesive article of claim 1 wherein the shape-memory polymer sheet in the intrinsic shape cleanly debonds from the first adhesive layer. 21. The heat-debondable adhesive article of claim 1 wherein the first adhesive layer comprises an acrylic foam tape.
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이 특허에 인용된 특허 (24)
Martens John A. (White Bear Lake MN) Clemens Lawrence M. (Minneapolis MN) Zigman Alvin R. (Woodbury MN), Acrylic-type pressure sensitive adhesives by means of ultraviolet radiation curing.
Kotnour Thomas A. (Cottage Grove MN) Barber Ronald L. (Oakdale MN) Krueger Walter L. (St. Paul MN), Continuous free radial polymerization in a wiped-surface reactor.
Brown Mary L. (St. Paul MN) Goetz Richard J. (Woodbury MN) Moore Cheryl L. (Afton MN) Battles Donald R. (Arden Hills MN), Pressure sensitive adhesive(s) and articles(s).
Bitler Steven P. (Menlo Park CA) Stewart Ray F. (Redwood City CA) Kamp David A. (Sunnyvale CA) Freelin Robert G. (McLean VA) Yoon Valentine Y. (Redwood City CA), Thermoplastic Elastomers.
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