公开(公告)号：US20220267649A1

公开(公告)日：2022-08-25

申请号：US17624891

申请日：2020-07-17

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： James N. Coffey ,  Zhifeng Bai ,  Scott H. Loyd ,  Alexandra K. Valdez ,  Chaky D. Muankaew ,  Eleni E. Stamatakis ,  Adam P. Hamilton ,  Rajesh Puthenkovilakom Raja

IPC: C09J123/16 ,  C08K5/01

Abstract: A pressure-sensitive adhesive may comprise: about 18 wt % to about 90 wt % of a propylene-ethylene(-diene) (PE(D)M) copolymer; about 10 wt % to about 65 wt % of a tackifier; and 0 wt % to about 40 wt % of an oil. The PE(D)M copolymer may comprise: (a) about 60 wt % to about 99 wt % propylene, (b) about 1 wt % to about 40 wt % ethylene or a C4 to C22 alpha-olefin, and (c) 0 wt % to about 20 wt % diene, wherein the PE(D)M copolymer has a heat of fusion of about 15 J/g or less.

公开(公告)号：US11591421B2

公开(公告)日：2023-02-28

申请号：US16632711

申请日：2018-05-08

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Rajesh Puthenkovilakom Raja ,  Jeffrey D. Daily ,  Amit Kumar Ghosh ,  Anna C. Claerbout ,  Linda M. Van den Bossche ,  Paul J. Clymans

IPC: C08F210/02 ,  C08F218/08 ,  C08F2/34 ,  C08F2/38 ,  C08K5/01 ,  C08K5/14

Abstract: A process for producing an ethylene copolymer, the process including: (a) contacting ethylene with at least one polar comonomer in the presence of at least one modifier and at least one free radical initiator in a tubular reactor under polymerization conditions including a pressure of from 225 to 270 MPa; (b) injecting the at least one free radical initiator into the reactor at a plurality of reaction zones spaced along the length of the reactor, wherein each reaction zone comprises an inlet and an outlet; (c) maintaining the temperature at the inlet of each reaction zone at 150° C. or less, and the temperature at the outlet of each reaction zone is at least 177° C.; (d) controlling the modifier flow at a rate of from 0.02 to 0.986 wt % of the copolymer; and (e) recovering the ethylene copolymer from the tubular reactor, is provided.