06319998 is referenced by 65 patents and cites 47 patents.

This invention relates to a method of making polymer blends using series reactors and a metallocene catalyst. Monomers used by the invention are ethylene, a higher alpha-olefin (propylene most preferred), and optionally, a non-conjugated diene (ethylidene norbornene, i.e., ENB, most preferred). More specifically, this invention relates to making blends of EP (ethylene-propylene) copolymers in which the blend components differ in any of the following characteristics: 1) composition 2) molecular weight, and 3) crystallinity. We use the terminology EP copolymer to also include terpolymers that contain varying amounts of non-conjugated diene. Such terpolymers are commonly known as EPDM.

Title
Method for making polymer blends by using series reactors
Application Number
9/260787
Publication Number
6319998 (B1)
Application Date
March 1, 1999
Publication Date
November 20, 2001
Inventor
Donna J Crowther
Baytown
TX, US
John F Walzer Jr
Seabrook
TX, US
Bernard J Folie
Brussels
US
Bruce A Harrington
Houston
TX, US
Sudhin Datta
Houston
TX, US
Charles C Cozewith
Bellaire
TX, US
Agent
Stephen D Prodnuk
US
Anthony Chi
US
Assignee
Exxon Mobil Chemical Patents
TX, US
IPC
C08F 2/06
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