US 11,884,850 B2
Adhesive film including a (meth)acrylate matrix including a curable epoxy/thiol resin composition, tape, and method
Eric G. Larson, Lake Elmo, MN (US); Michael A. Kropp, Cottage Grove, MN (US); Matthew J. Kryger, Hudson, WI (US); and Shijing Cheng, Woodbury, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 16/643,606
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Sep. 14, 2018, PCT No. PCT/IB2018/057052
§ 371(c)(1), (2) Date Mar. 2, 2020,
PCT Pub. No. WO2019/053646, PCT Pub. Date Mar. 21, 2019.
Claims priority of provisional application 62/558,884, filed on Sep. 15, 2017.
Prior Publication US 2020/0208020 A1, Jul. 2, 2020
Int. Cl. C09J 7/35 (2018.01); F16B 15/00 (2006.01); C09J 11/06 (2006.01)
CPC C09J 7/35 (2018.01) [C09J 11/06 (2013.01); F16B 15/0092 (2013.01); C09J 2433/00 (2013.01); C09J 2463/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A thermally curable adhesive film comprising:
a crosslinked (meth)acrylate matrix; and
a thermally curable, one-part epoxy/thiol resin composition incorporated within the crosslinked (meth)acrylate matrix; wherein the thermally curable, one-part epoxy/thiol resin composition comprises:
an epoxy resin component comprising an epoxy resin having at least two epoxide groups per molecule;
a thiol component comprising a polythiol compound having at least two thiol groups;
a nitrogen-containing catalyst for the epoxy resin; and
an organic acid, the organic acid being soluble in the epoxy/thiol resin composition, wherein soluble in the epoxy/thiol resin composition means when the organic acid is incorporated in the epoxy/thiol resin in an amount of 5 wt-%, it produces an epoxy/thiol resin composition with at least 80% clarity and at least 80% transmission.