Low Tg ethylene-based polymer, cycloolefin polymer blends
AssigneeE. I. Du Pont de Nemours and Company
InventorKarlheinz Hausmann
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Abstract
Blends comprising an ethylene based polymer having a glass transition temperature lower than or equal to 20° C. and cycloolefin polymer are prepared. The ethylene based polymer preferably comprises at least 60 weight % of ethylene, relative to the weight of the polymer and polar monomers selected from the group of carboxylic acids, alkyl acrylates and vinyl acetates. It is preferably 0.01 to about 99.5% neutralized with metal ions selected from sodium, potassium, zinc, calcium, magnesium, lithium, aluminum, nickel, and chromium. The cycloolefin polymer is preferably an ethylene-norbornene copolymer. The invention also relates to the applications of such blends to improved impact resistant molded articles.
Claims11
A blend comprising at least an ethylene based polymer having a glass transition temperature lower than or equal to 20° C. and at least a cycloolefin polymer.
A method for improving the impact resistance of a molded article made of a cycloolefin polymer comprising the step of introducing therein from about 0.1 to 50% by weight, relative of the weight of the article, of an ethylene based polymer having a glass transition temperature lower than or equal to 20° C.
Dependencies are inferred from the claim text.