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.