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US 5,478,891 AGranted
Polymer compositions
AssigneeIGI Baychem, Inc.
InventorsP. R. Lakshmanan, Amir Tayebianpour
Life of this patent
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Abstract
Blended polymer compositions are disclosed comprising an admixture of (a) a copolymer of ethylene and an alphaolefin and (b) an amorphous polypropylene, and/or amorphous polyolefin, or mixtures thereof.
Claims8
A composition of matter comprising:
- (1) from about 50% to about 95% by weight of a blended copolymer, said blended copolymer comprising from about 2.5% to about 80% by weight of a first component comprising an at least partially crystalline ethylene-alphaolefin copolymer, said alphaolefin having four or more carbons and said copolymer having a specific density of less than 0.90 g/cm.sup.3 and from about 20% to about 97.5% by weight of a second component selected from a group consisting of amorphous propylene homopolymer, amorphous propylene-alphaolefin copolymer and admixtures thereof;
- and
- (2) from about 50% to about 5% by weight polybutene, said composition containing less than 10% by weight of a crystalline propylene polymer.
A hot melt adhesive composition comprising an admixture of:
- from about 2.5% to about 80% by weight of a first component comprising an at least partially crystalline ethylene-alphaolefin copolymer, said alphaolefin having four or more carbons, and said copolymer having a specific density of less than 0.90 g/cm.sup.3 ;
- from about 20% to about 97.5% by weight of a second component selected from a group consisting of amorphous propylene homopolymer, amorphous propylene-alphaolefin copolymer and mixtures thereof;
- a tackifier;
- and polybutene,
- said composition containing less than 10% by weight of a crystalline propylene polymer.
2 more elements
Dependencies are inferred from the claim text.