Chromium complexes and their use in olefin polymerization

Details Chromium complexes and their use in olefin polymerization Chromium complexes and their use in olefin polymerization

2007-11-20

2007-11-20

Lu, Caixia (Department: 1713)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

C556S057000, C502S103000, C502S167000, C526S161000, C526S165000

Reexamination Certificate

active

11152802

ABSTRACT:
A composition having the formula Iwhere R1and R2are independently hydrogen, C1to C12linear and branched alkyl, C3to C12cycloalkyl, aryl, C1to C12alkoxy, F, Cl, SO3, C1to C12perfluoroalkyl, and N(CH3)2,R3is independently selected from the group consisting of hydrogen, C1to C12linear and branched alkyl, C3to C12cycloalkyl, aryl, and 2,2,2-trifluoroethyl,A is —C(R4)—, —(CH2)x—, —(CH2)xNH(CH2)x—, or —CY2CY2—, where R4is a hydrocarbyl, halosubstituted hydrocarbyl, or alkoxy group of from 1 to 12 carbon atoms, x is an integer from 1 to 12, and Y is halogen,andX is halogen, triflate, acetate, trifluoroacetate, hydride, or tetrafluoroborate.When combined with an activating co-catalyst is useful in polymerizing olefinic monomers.

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