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US 5,459,187 AGranted
Polyethylene with reduced melt fracture
AssigneeNovacor Chemicals Ltd.
InventorsJoseph W. Taylor, Shivendra K. Goyal, Norman D. J. Aubee, Nick K. K. Bohnet
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Abstract
The present invention relates to a polyolefin composition, having good extrusion characteristics. The composition comprises a fluoropolymer; one or more of a low molecular weight C.sub.1-4 alkyl ethers of a poly C.sub.2-4 alkylene oxide; and a metal oxide the weight ratio of the ether to fluoropolymer being less than 1:1. The blend is suitable for making blown film.
Claims16
An extrudable composition comprising:
- i) a predominant amount of an olefin polymer;
- ii) from 0.01 to 1 weight % of a chemical selected from the group consisting of C.sub.1-4 alkyl ethers of poly C.sub.2-6 ethylenically unsaturated glycols and mixtures thereof, said ethers having a weight average molecular weight less than 20,000;
- iii) from 0.01 to 1 weight % of fluoropolymer having an atomic ratio of fluorine to carbon of at least 1:2;
- and
- iv) from 50 to 500 ppm of a metal oxide, or hydrotalcite (Mg.sub.6 Al.sub.2 (OH).sub.16 CO.sub.3.4H.sub.2 O),
- the weight ratio of component ii) to component iii) being from 0.60:1 to 0.90:1.
3 more elements
Dependencies are inferred from the claim text.