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US 4,303,571 AGranted
Film-forming thermoplastic elastomeric polymer compositions
AssigneeExxon Research & Engineering Co.
InventorsDeborah S. Jansen, Robert C. Puydak
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Abstract
There are disclosed film-forming polymer blends useful for the production of tubular blown film comprising EPM or EPDM elastomers, ethylene-vinyl acetate copolymers and a hydrocarbon oil plasticizer. The films exhibit resiliency and elasticity and high melt flow properties.
Claims13
A film-forming thermoplastic elastomeric blend composition consisting essentially of a blend of:
- (a) about 25 to 55 parts by weight of an EPM or EPDM elastomer having an ethylene content of from about 55 to 70 weight percent;
- (b) about 35 to 55 parts by weight of a thermoplastic ethylene-vinyl acetate copolymer having a vinyl acetate content of about 9 to 40% by weight;
- and
- (c) about 15 to 25 parts by weight of a normally liquid hydrocarbon process oil, the oil being an aromatic, highly aromatic, naphthenic or paraffinic process or extender oil, the blend composition containing at least 4.5% by weight vinyl acetate based upon the total weight of the blend composition and the blend composition having a melt index at 190.degree. C. of about 0.5 to 15 gm./10 min.
1 more element
Dependencies are inferred from the claim text.