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US 11,453,766 B2Granted
Eva-containing compositions with improved mechanical properties and articles and methods thereof
AssigneeBraskem S.A.
InventorGiancarlos Delevati
Life of this patent
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Abstract
Blended polymer compositions and methods of making the same include an elastomeric EVA composition in an amount ranging from about 46 to 70 wt % of the polymer composition; and a polypropylene in an amount ranging from about 20 to 40 wt % of the polymer composition. Methods include mixing an elastomeric EVA composition with polypropylene, and extruding the mixture of elastomeric EVA composition and polypropylene.
Claims28
A polymer composition, comprising:
- an elastomeric EVA composition in an amount ranging from about 46 to 70 wt % of the polymer composition;
- and
- a polypropylene in an amount ranging from about 20 to 40 wt % of the polymer composition;
- wherein the elastomeric EVA composition comprises an ethylene vinyl acetate, an ethylene alpha-olefin copolymer, a rubber, a plasticizer, and a polyorganosiloxane;
- and
- wherein the polypropylene has a melt flow index according to ASTM D1238 at 230° C. and 2.16 kg that ranges from 3 to 45 g/10 min.
3 more elements
A polymer composition, comprising:
- an elastomeric EVA composition;
- and a polypropylene,
- wherein the elastomeric EVA composition comprises an ethylene vinyl acetate, an ethylene alpha-olefin copolymer, a rubber, a plasticizer, and a polyorganosiloxane;
- wherein the polypropylene has a melt flow index according to ASTM D1238 at 230° C. and 2.16 kg that ranges from 3 to 45 g/10 min;
- wherein the polymer composition has a Shore D Hardness according to ASTM D2240 that ranges from 25 to 54 Shore D;
- and a tensile modulus at 100% elongation according to ASTM D638 that ranges from 5 to 20 MPa.
3 more elements
A thermoplastic article comprising a polymer composition comprising:
- an elastomeric EVA in an amount ranging from about 46 to 70 wt % of the polymer composition;
- and
- a polypropylene in an amount ranging from about 20 to 40 wt % of the polymer composition,
- wherein the elastomeric EVA composition comprises an ethylene vinyl acetate, an ethylene alpha-olefin copolymer, a rubber, a plasticizer, and a polyorganosiloxane.
1 more element
A method, comprising:
- mixing an elastomeric EVA composition with polypropylene, and extruding the mixture of elastomeric EVA composition and polypropylene;
- wherein the elastomeric EVA composition comprises an ethylene vinyl acetate, an ethylene alpha-olefin copolymer, a rubber, a plasticizer, and a polyorganosiloxane;
- and
- wherein the polypropylene has a melt flow index according to ASTM D1238 at 230° C. and 2.16 kg that ranges from 3 to 45 g/10 min.
1 more element
Dependencies are inferred from the claim text.