US 11,702,572 B2
Two-component solventless adhesive compositions
Wenwen Li, Pearland, TX (US); Yinzhong Guo, Pearland, TX (US); and Mai Chen, Chicago, IL (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
Appl. No. 16/617,412
Filed by Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
PCT Filed Apr. 4, 2018, PCT No. PCT/US2018/025982
§ 371(c)(1), (2) Date Nov. 26, 2019,
PCT Pub. No. WO2018/222272, PCT Pub. Date Dec. 6, 2018.
Claims priority of provisional application 62/516,916, filed on Jun. 8, 2017.
Claims priority of provisional application 62/512,208, filed on May 30, 2017.
Prior Publication US 2020/0140729 A1, May 7, 2020
Int. Cl. C09J 175/08 (2006.01); C08G 18/50 (2006.01); C08G 18/10 (2006.01); C08G 18/32 (2006.01); C08G 18/38 (2006.01); C08G 18/66 (2006.01); C08G 18/80 (2006.01); C08G 18/48 (2006.01); C08G 18/75 (2006.01); B32B 7/12 (2006.01)
CPC C09J 175/08 (2013.01) [C08G 18/10 (2013.01); C08G 18/3206 (2013.01); C08G 18/3885 (2013.01); C08G 18/4812 (2013.01); C08G 18/4825 (2013.01); C08G 18/4829 (2013.01); C08G 18/5084 (2013.01); C08G 18/6696 (2013.01); C08G 18/755 (2013.01); C08G 18/757 (2013.01); C08G 18/758 (2013.01); C08G 18/8054 (2013.01); B32B 7/12 (2013.01)] 16 Claims
 
1. A two-component solventless adhesive composition, comprising:
an isocyanate component comprising an isocyanate-terminated prepolymer; and
an isocyanate-reactive component comprising:
a hydroxy-terminated polyurethane resin which is a reaction product of a polyisocyanate and a polyol component;
a polyether polyol;
a phosphate ester adhesion promoter made from a tri-functional propylene glycol, a polyphosphoric acid, and a polyisocyanate; and
optionally, a bio-based polyol;
wherein the phosphate ester adhesion promoter has a phosphoric acid content of less than 4 weight percent based on the weight of the phosphate ester adhesion promoter; and
wherein the phosphate ester adhesion promoter accounts for 0.5 to 15 percent of the total weight of the isocyanate-reactive component.