Syndiotactic propylene copolymers

Details Syndiotactic propylene copolymers Syndiotactic propylene copolymers

1995-06-07

1997-09-02

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263482, 5263483, 5263484, 5263485, 5263486, 5263487, 526160, 526943, 26433115, C08F21006

Patent

active

056632681

ABSTRACT:
A syndiotactic propylene copolymer is obtained in high yields by copolymerization of propylene with small amounts of other olefins in the presence of a catalyst comprising a metallocene of the formula I ##STR1## in which M.sup.1 is titanium, zirconium, hafnium, vanadium, niobium or tantalum and an aluminoxane. This copolymer has a very high molecular weight, a very narrow molecular weight distribution, very high syndiotaxicity, advantageously low melting points and rubber-like behavior. Molded articles produced from the polymer are distinguished by high transparency, flexibility and tear strength. Their main areas of application are packagings of any type.

REFERENCES:
patent: 4892851 (1990-01-01), Ewen et al.
patent: 5169924 (1992-12-01), Asanuma et al.

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