US 12,116,507 B2
Solventless adhesive composition and method for preparing the same
Chenyan Bai, Shanghai (CN)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/601,397
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Apr. 4, 2019, PCT No. PCT/CN2019/081413
§ 371(c)(1), (2) Date Oct. 4, 2021,
PCT Pub. No. WO2020/199175, PCT Pub. Date Oct. 8, 2020.
Prior Publication US 2022/0186097 A1, Jun. 16, 2022
Int. Cl. C09J 175/06 (2006.01); C08G 18/10 (2006.01); C08G 18/12 (2006.01); C08G 18/40 (2006.01); C08G 18/42 (2006.01); C08G 18/48 (2006.01); C08G 18/76 (2006.01); C09J 175/08 (2006.01)
CPC C09J 175/06 (2013.01) [C08G 18/12 (2013.01); C08G 18/4018 (2013.01); C08G 18/42 (2013.01); C08G 18/4825 (2013.01); C08G 18/7671 (2013.01); C09J 175/08 (2013.01); C08G 2170/00 (2013.01); C09J 2301/162 (2020.08); C09J 2301/30 (2020.08); C09J 2475/00 (2013.01)] 13 Claims
 
1. A solventless adhesive composition, comprising:
(A) an isocyanate component comprising a prepolymer which is derived from the reaction of
(i) one or more isocyanate compounds comprising at least two isocyanate groups with
(ii) one or more first isocyanate-reactive compounds having at least two isocyanate-reactive groups and at least one side chain represented by Formula I
—R2—(O—R1—O)n—R3  Formula I
wherein R1 represents a C2 to C4 alkylene group, R2 is a C1 to C6 alkylene group, and R3 is a C1 to C6 alkyl; and n is an integer of 8 to 25,
and
(iii) one or more second isocyanate-reactive compounds having at least two isocyanate-reactive groups and not having the side chain represented by Formula I,
the second isocyanate-reactive compound selected from the group consisting of a polyester polyol, a polyether polyol, and combinations thereof;
wherein the prepolymer comprises at least two free isocyanate groups and (A)(i), (A(ii), and (A)(iii) amount to 100 wt % of the isocyanate component (A); and
(B) an isocyanate-reactive component comprising one or more third isocyanate-reactive compounds having at least two isocyanate-reactive groups, wherein the third isocyanate-reactive compound is different from the first isocyanate-reactive compound.