Polyethylene blends
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorMahmoud; R. Rifi
Life of this patent
Estimating the term…
Abstract
A pre-formed composition having essentially no yield point comprising a blend of: (a) at least about 50 percent by weight of a copolymer of ethylene and a 4 to 8 carbon atom alpha-olefin having a density in the range of 0.880 to 0.915 gram per cubic centimeter; a melt index of no greater than about one gram per 10 minutes; long chain branching in an amount of about 0.5 to about 1.5 long chains per 1000 carbon atoms; and a molecular weight of at least about 200,000; and (b) at least about 5 percent by weight of a copolymer of ethylene and vinyl acetate or a copolymer of ethylene and ethyl acrylate, the percent by weight being based on the combined weight of components (a) and (b).
Claims9
A pre-formed composition having essentially no yield point comprising a blend of:
- (a) at least about 50 percent by weight of a copolymer of ethylene and one or more 4 to 8 carbon atom alpha-olefins having a density in the range of 0.880 to 0.915 gram per cubic centimeter;
- a melt index in the range of about 0.05 to about 0.8 gram per 10 minutes;
- long chain branching in an amount of about 0.5 to about 1.5 long chains per 1000 carbon atoms;
- and a molecular weight of at least about 200,000;
- (b) at least about 5 percent by weight of a copolymer of ethylene and vinyl acetate or a copolymer of ethylene and ethyl acrylate, the percent by weight being based on the combined weight of components (a) and (b);
- and
- (c) a liquid hydrocarbon oil having a viscosity in the range of about 100 to about 3000 Saybolt Universal Seconds at 100.degree. F. is an amount of about 5 to about 30 parts by weight of oil per 100 parts of the combined weight of components (a) and (b).
A pre-formed composition having essentially no yield point comprising a blend of:
- (a) at least about 70 percent by weight of a copolymer of ethylene and 1-butene or 1-hexene having a density in the range of 0.880 to 0,915 gram per cubic centimeter;
- a melt index in the range of about 0.05 to about 0.8 gram per 10 minutes;
- long chain branching in an amount of about 0.5 to about 1.5 long chains per 1000 carbon atoms;
- and a molecular weight of at least about 200,000;
- and
- (b) at least about 5 percent by weight of a copolymer of ethylene and vinyl acetate or a copolymer of ethylene and ethyl acrylate, the percent by weight being based on the combined weight of components (a) and (b);
- and
- (c) additionally containing a liquid hydrocarbon oil having a viscosity in the range of about 2500 to about 3000 Saybolt Universal Seconds at 100.degree. F. in an amount of about 5 to about 20 parts by weight of oil per 100 parts of combined weight of components (a) and (b).
Dependencies are inferred from the claim text.