Polymer compositions comprising amorphous propylene polymer
AssigneeIGI Baychem, Inc.
InventorsP. R. Lakshmanan, Amir Tayebianpour
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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.
Claims20
A polymer 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 ;
- and
- from 20% to 97.5% by weight of a second component selected from the group consisting of amorphous propylene homopolymer, amorphous propylene-alpha olefin copolymer and admixtures thereof,
- said composition containing less than 10% by weight of a crystalline propylene polymer.
A blended polymer composition comprising an admixture of:
- from about 50% to about 90% by weight amorphous propylene homopolymer or amorphous propylene-alpha olefin copolymer or mixtures thereof;
- and
- from about 10% to about 50% by weight of an at least partially crystal copolymer of ethylene and butene, said copolymer having a specific density of less than 0.90 cm.sup.3,
- 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 20% to 97.5% by weight of a second component selected from the group consisting of amorphous propylene homopolymer, amorphous propylene-alpha olefin copolymer and mixtures thereof;
- and
- a tackifier,
- said composition containing less than 10% by weight of a crystalline propylene polymer.
The method of producing a polymer composition comprising admixing,
- 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 97.5% by weight of a second component selected from the group consisting of amorphous propylene homopolymer, amorphous propylene-alpha olefin copolymer and mixtures thereof,
- said mixture containing less than 10% by weight of a crystalline propylene polymer.
Dependencies are inferred from the claim text.