公开(公告)号：US20250026927A1

公开(公告)日：2025-01-23

申请号：US18716299

申请日：2022-12-14

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Giriprasath Gururajan ,  Lauren P. Bram ,  Eugene R. Uhl ,  Luis A. Sotomayor ,  Caol P. Huff ,  Alexandra K. Valdez ,  Jennifer J. Austin

IPC: C08L23/16 ,  C09J7/32 ,  C09J123/16

Abstract: Propylene-based elastomer compositions that include a blend of a majority polymer fraction having a higher Mw and a minority polymer fraction having a lower Mw, methods of making same, and hot melt adhesives including such compositions. The polymer blend compositions can include: a major polymer fraction having a Mw of about 100,000 to about 300,000 and a melt flow rate of about 0.1 g/10 min to about 70.0 g/10 min, according to ASTM D1238; and a minor polymer fraction having a Mw of about 5,000 to about 60,000 and a Brookfield viscosity of about 500 cP to about 50,000 cP, according to ASTM D-3236 (190° C.), wherein an amount of the at least one other polyolefin comonomer in the minor polymer fraction is at least 7 wt % less than an amount of the at least one other polyolefin comonomer in the major polymer fraction.

公开(公告)号：US20250002764A1

公开(公告)日：2025-01-02

申请号：US18710495

申请日：2022-11-18

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Jennifer J. Austin ,  Madelyn Bekker ,  Pilanda Watkins-Curry ,  Jurgen Jan Martha Schroeyers ,  Clement Arinal

IPC: C09J123/10 ,  C09J153/02

Abstract: Hot melt adhesives may comprise linear alpha olefins (LAOs) or LAO-derived compounds as an at least partial replacement for paraffinic white oil diluents. Such adhesive compositions may comprise an ethylenically unsaturated polymer or copolymer, a tackifier, and a diluent. The diluent may comprise at least one of: one or more C18+ linear alpha olefins (LAOs) having a kinematic viscosity of about 4 cSt or less at 135° C.; one or more LAO dimers formed from one or more C18+ LAOs, the one or more LAO dimers having an internal olefin and a kinematic viscosity of about 6 cSt or less at 135° C., or one or more paraffinic hydrocarbons having an even carbon number distribution and formed through dimerization of one or more C18+ LAOs and subsequent reduction. The one or more paraffinic hydrocarbons may have a kinematic viscosity (ASTM D-445) of about 4 cSt to about 8 cSt at 135° C.