公开(公告)号：US20250043034A1

公开(公告)日：2025-02-06

申请号：US18717173

申请日：2022-12-14

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Giriprasath Gururajan ,  Rong Ma ,  Narayanaswami Dharmarajan ,  Jean-Roch Schauder

IPC: C08F2/01 ,  C08F4/659

Abstract: Processes for making olefin copolymers, particularly ethylene-based copolymers. A process for making an olefin copolymer can include introducing an olefin monomer, at least one other olefin comonomer, and a single type of catalyst system to a tubular reactor to produce an olefin copolymer containing: a) an absolute comonomer distribution (CD) slope 90 of about 2.0 to about 30.0, an absolute CD slope 75 of about 2.0 to about 30.0, an absolute CD slope 50 of about 2.0 to about 30.0, or an absolute CD slope 25 of about 2.0 to about 30.0; b) a first long chain branching index (g′(Mz)) of about 0.30 to about 1.0; and c) a second long chain branching index (g′(Mz+1)) of about 0.30 to about 1.0. The tubular reactor can include one or more plug flow components, one or more spiral heat exchangers, and/or a recycle pump.

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.