Polymerization catalysts

Details Polymerization catalysts Polymerization catalysts

2006-12-12

2006-12-12

Choi, Ling-Sui (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S352000, C526S161000

Reexamination Certificate

active

07148304

ABSTRACT:
A catalyst for the polymerization of 1-olefins is disclosed, which comprises (1) a compound of Formula B wherein M is Fe[II], Fe[III], Co[I], Co[II], Co[III], Mn[I], Mn[II], Mn[III], Mn[IV], Ru[II], Ru[III] or Ru[IV]; X represents an atom or group covalently or ionically bonded to the transition metal M; T is the oxidation state of the transition metal M and b is the valency of the atom or group X; R1, R2, R3, R4, R5, R6and R7are independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; and when any two or more of R1–R7are hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl, said two or more can be linked to form one or more cyclic substituents; and (2) a further catalyst. Copolymers made using the catalyst having specific physical properties are also disclosed

REFERENCES:
patent: 5955555 (1999-09-01), Bennett
patent: 6262196 (2001-07-01), Meckling
patent: 10-007712 (1998-01-01), None
patent: WO 97/48735 (1997-12-01), None
patent: WO 98/38228 (1998-09-01), None
patent: WO 98/44011 (1998-10-01), None

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