US 11,993,712 B2
Curable compositions for use as adhesives having properties capable of being altered based on external stimuli and methods of making and using the same
Jon Scholte, Exton, PA (US); Mahendra Christopher Orilall, Downingtown, PA (US); and Jeffrey A. Klang, West Chester, PA (US)
Assigned to Arkema France, Colombes (FR)
Appl. No. 17/043,414
Filed by Arkema France, Colombes (FR)
PCT Filed Feb. 26, 2019, PCT No. PCT/EP2019/054751
§ 371(c)(1), (2) Date Sep. 29, 2020,
PCT Pub. No. WO2019/185260, PCT Pub. Date Oct. 3, 2019.
Claims priority of provisional application 62/650,584, filed on Mar. 30, 2018.
Prior Publication US 2021/0017381 A1, Jan. 21, 2021
Int. Cl. C09J 175/16 (2006.01); C08G 18/10 (2006.01); C08G 18/42 (2006.01); C08G 18/67 (2006.01); C08G 18/75 (2006.01); C08G 18/81 (2006.01); C08L 75/16 (2006.01)
CPC C08L 75/16 (2013.01) [C08G 18/10 (2013.01); C08G 18/4238 (2013.01); C08G 18/672 (2013.01); C08G 18/755 (2013.01); C08G 18/8166 (2013.01); C09J 175/16 (2013.01)] 40 Claims
OG exemplary drawing
 
1. An adhesive comprising a cured composition resulting from curing a curable composition comprising:
a) at least one urethane (meth)acrylate oligomer having a structure comprising:
a1) at least one polyol backbone segment having at least one reacted end, wherein the polyol comprises a polyester;
a2) at least one reacted polyisocyanate forming a urethane linkage at the at least one reacted end of each of said at least one polyol backbone segment; and
a3) at least one blocking end group reacted with said at least one reacted polyisocyanate to form a reversible bond and wherein said at least one blocking end group bears a (meth)acrylate group;
b) either:
b1) a monofunctional chain terminator or
b2) a polyfunctional chain extender and
c) optionally, at least one monofunctional ethylenically unsaturated monomer or oligomer different from a),
wherein the at least one urethane (meth)acrylate oligomer has a molecular weight distribution having two primary peaks comprising a lower molecular weight peak in a range of 800 to 1,500 g/mol and a higher molecular weight peak in a range of 6,000 to 12,000 g/mol.