Process for producing polyethylene material of high strength and

Details Process for producing polyethylene material of high strength and Process for producing polyethylene material of high strength and

1996-10-02

1998-05-26

Weber, Thomas R.

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

Synthetic resins

Treating polymer containing material or treating a solid...

C08F 626

Patent

active

057566607

ABSTRACT:
A polyethylene article such as film or fiber having high strength and high elastic modulus is produced by orienting an ultra-high molecular weight polyethylene having an intrinsic viscosity at 135.degree. C. in decalin of 5 to 50 dl/g, said ultra-high molecular weight polyethylene being prepared by homo- or copolymerizing ethylene in the presence of a catalyst system and hydrogen, said catalyst system comprising (1) a solid catalyst component containing at least magnesium, titanium and/or vanadium, (2) an organometallic compound and (3) a compound represented by the following ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen or a hydrocarbon residue, with the proviso that any two of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may conjointly form a cyclic hydrocarbon residue.

REFERENCES:
patent: 3684782 (1972-08-01), Longi et al.
patent: 3800008 (1974-03-01), Starkweather, Jr.
patent: 4972035 (1990-11-01), Suga et al.
patent: 5331071 (1994-07-01), Kataoka et al.

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