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US 5,399,401 AGranted
Flexible, low haze chlorine-free ethylene copolymer article
AssigneeE. I. Du Pont de Nemours and Company
InventorRichard J. Powell
Life of this patent
Estimating the term…
Abstract
Highly flexible articles having wall thickness of at least 0.01 inches are made from chlorine-free direct ethylene copolymers containing small amounts of selected known slip additives. Articles in the form of tubes or tubing have particular utility for replacement of PVC based tubing used in medical applications.
Claims9
A flexible, low haze, article prepared from a composition, the composition comprising:
- a) a chlorine-free ethylene/alkyl acrylate/(meth)acrylic acid copolymer or ionomer thereof, said copolymer or ionomer thereof having a flexural modulus of about 2000-7000 psi, and
- b) a sufficient amount, in the range of about 0.1-0.8 weight percent, based on the weight of the copolymer, of a secondary amide selected from the group consisting of N,N'-ethylene-bis-oleamide, N-oleyl erucamide, and N-erucyl erucamide to provide good handleablity and a percent haze of less than 35 as measured using ASTM D-1003 on a plaque stored at ambient temperature for at least one month,
- the article having a thickness of at least about 0.01 inches.
A flexible, low haze, article prepared from a composition, the composition comprising:
- a) a chlorine-free ethylene/vinyl acetate copolymer having a flexural modulus of about 2000-7000 psi, and
- b) a sufficient amount, in the range of about 0.1-0.8 weight percent, based on the weight of the copolymer, of a secondary amide selected from the group consisting of N-oleyl erucamide and N-erucyl erucamide to provide good handleablity and a percent haze of less than 35 as measured using ASTM D-1003 on a plaque stored at ambient temperature for at least one month,
- the article having a thickness of at least about 0.01 inches.
Dependencies are inferred from the claim text.