ADHESIVE FILM, METHOD FOR FORMING AN ADHESIVE FILM, AND URETHANE POLYMER

• US 20190322903A1
• Filed: 03/29/2019
• Published: 10/24/2019
• Est. Priority Date: 04/23/2018
• Status: Active Grant

• Current Assignee: Shin-Etsu Chemical Company Limited
• Original Assignee: Shin-Etsu Chemical Company Limited
• Inventors: HATAKEYAMA, Jun, IWABUCHI, Motoaki, NIIDA, Keisuke, HASEGAWA, Koji
• Granted Patent: US 10,934,463 B2
• Time in Patent Office: Days
• CPC Class Codes: C08F 299/065 from polyurethanes with side or terminal unsaturations
• CPC Class Codes: C08G 18/246 containing also tin-carbon bonds
• CPC Class Codes: C08G 18/3893 containing silicon
• CPC Class Codes: C08G 18/48 Polyethers
• CPC Class Codes: C08G 18/4854 Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
• CPC Class Codes: C08G 18/672 Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
• CPC Class Codes: C08G 18/73 acyclic
• CPC Class Codes: C08G 18/758 containing two or more cycloaliphatic rings
• CPC Class Codes: C08G 18/837 by silicon containing compounds
• CPC Class Codes: C08G 77/458 containing polyurethane sequences
• CPC Class Codes: C08G 77/70 Siloxanes defined by use of the MDTQ nomenclature
• CPC Class Codes: C09J 151/08 grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C09J 175/04 Polyurethanes
• CPC Class Codes: C09J 175/16 having terminal carbon-to-carbon unsaturated bonds
• CPC Class Codes: C09J 183/10 Block or graft copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C09J151/08, C09J153/00
• CPC Class Codes: C09J 2451/00 Presence of graft polymer
• CPC Class Codes: C09J 2475/00 Presence of polyurethane
• CPC Class Codes: C09J 2483/00 Presence of polysiloxane
• CPC Class Codes: C09J 5/06 involving heating of the applied adhesive
• CPC Class Codes: C09J 7/10 without carriers
• CPC Class Codes: C09J 7/30 : characterised by the adhesive composition

Abstract

The present invention provides an adhesive film including a resin having a silsesquioxane in a side chain and a urethane bond in a main chain, together with a method for forming the same. The inventive adhesive film has excellent stretchability and strength, with the film surface having higher adhesion and thinner film thickness.

Claims

1. An adhesive film comprising a resin having a silsesquioxane in a side chain and a urethane bond in a main chain.

2. The adhesive film according to claim 1, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain includes a structure shown by the following general formula (1):

3. The adhesive film according to claim 2, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain satisfies 0.01≤

p<

0.5.

4. The adhesive film according to claim 1, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a reaction product of a diol compound shown by the following general formula (2) and a compound having an isocyanate group,

5. The adhesive film according to claim 2, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a reaction product of a diol compound shown by the following general formula (2) and a compound having an isocyanate group,

6. The adhesive film according to claim 3, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a reaction product of a diol compound shown by the following general formula (2) and a compound having an isocyanate group,

7. The adhesive film according to claim 1, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a reaction product of a diol compound shown by the following general formula (3) and a compound having an isocyanate group,

8. The adhesive film according to claim 2, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a reaction product of a diol compound shown by the following general formula (3) and a compound having an isocyanate group,

9. The adhesive film according to claim 3, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a reaction product of a diol compound shown by the following general formula (3) and a compound having an isocyanate group,

10. The adhesive film according to claim 7, wherein the diol compound shown by the general formula (3) is a reaction product of compounds shown by the following general formulae (4)-1, (4)-2, and (4)-3:

11. The adhesive film according to claim 8, wherein the diol compound shown by the general formula (3) is a reaction product of compounds shown by the following general formulae (4)-1, (4)-2, and (4)-3:

12. The adhesive film according to claim 9, wherein the diol compound shown by the general formula (3) is a reaction product of compounds shown by the following general formulae (4)-1, (4)-2, and (4)-3:

13. The adhesive film according to claim 1, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a cured material of a compound having a (meth)acrylate group at a terminal thereof shown by the following general formula (5):

14. The adhesive film according to claim 2, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a cured material of a compound having a (meth)acrylate group at a terminal thereof shown by the following general formula (5):

15. The adhesive film according to claim 3, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain is a cured material of a compound having a (meth)acrylate group at a terminal thereof shown by the following general formula (5):

16. The adhesive film according to claim 1, wherein the resin having a silsesquioxane in a side chain and a urethane bond in a main chain has a weight average molecular weight of 500 or more.

17. A method for forming an adhesive film, comprising:

mixing at least a diol compound shown by the following general formula (2) and a compound having an isocyanate group to prepare a mixture,

forming a film from the mixture, and

curing the film by heating,

18. A method for forming an adhesive film, comprising:

forming a film from a composition containing a compound having a (meth)acrylate group at a terminal thereof shown by the following general formula (5), and

curing the film by heating and/or light irradiation,

19. The method for forming an adhesive film according to claim 18, wherein the composition containing a compound having a (meth)acrylate group at a terminal thereof shown by the general formula (5) is formed into a film on a stretchable film, followed by curing by heating and/or light irradiation.

20. A urethane polymer comprising a (meth)acrylate group at a terminal thereof shown by the following general formula (5):