Exxonmobil Chemical Patents Inc.

Eastman Chemical Company

Synthomer Adhesive Technologies LLC

Rajesh Puthenkovilakom Raja

Marc Stacey Somers

Mutombo Joseph Muvundamina

Raymond Prescott Cottle

Bennett H Novak

Gary Robert Robe

Andrea Gail Hagood

Timothy Williams

Dhiraj Sudesh Sood

Paul Jan Clymans

Linda Maria Van Den Bossche

Anna C Claerbout

Jeffrey D Daily

Amit Kumar Ghosh

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&#xb0; C. or less, and the temperature at the outlet of each reaction zone is at least 177&#xb0; 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.

Process for producing ethylene copolymers

Amorphous propylene-ethylene copolymers are described herein that can include high amounts of ethylene and exhibit desirable softening points and needle penetrations. The desirable combinations of softening points and needle penetrations in these propylene-ethylene copolymers allow them to have a broad operating window. Due their broad operating window, the propylene-ethylene copolymers can be utilized in a wide array of applications and products, including hot melt adhesives.

Amorphous propylene-ethylene copolymers

Adhesives comprising amorphous propylene-ethylene copolymers

Growing community of inventors

Baytown, TX, United States of America

Rajesh Puthenkovilakom Raja