Modifying polyethylene made by Ziegler or single-site...

Details Modifying polyethylene made by Ziegler or single-site... Modifying polyethylene made by Ziegler or single-site...

2008-07-15

2008-07-15

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S333800, C525S192000, C525S194000, C525S240000, C526S160000, C526S124300

Reexamination Certificate

active

07399809

ABSTRACT:
A method of modifying a polyethylene is disclosed. In the method ethylene or a mixture of ethylene and a C3-C10 α-olefin is polymerized in an organic solvent with a Ziegler or single-site catalyst to form an initial polyethylene solution. The initial polyethylene solution is then reacted with a free radical initiator to produce a modified polyethylene. The modified polymer has an enhanced melt elasticity and increased long chain branching index, and is essentially free of gel.

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