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US 11,447,621 B2Granted
EVA thermoplastic compounds, methods thereof, and articles therefrom
AssigneeBraskem S.A.
InventorsGiancarlos Delevati, Cassia Ruoso
Life of this patent
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Abstract
Compositions may include a polymer composition prepared from an ethylene vinyl acetate copolymer, a rubber, and a plasticizer. Compositions may further comprise other components, such as a curing agent and a blowing agent. Articles may include a polymer composition prepared from an ethylene vinyl acetate copolymer, a rubber, and a plasticizer. Methods may include mixing an ethylene vinyl acetate copolymer, a rubber, and a plasticizer; and extruding the mixture thereof.
Claims28
A thermoplastic article comprising a polymer composition, comprising:
- an ethylene vinyl acetate copolymer present in the polymer composition in an amount ranging from 30 to 70 wt % of the polymer composition;
- rubber, different from the ethylene vinyl acetate copolymer;
- and
- a plasticizer present in the polymer composition in an amount ranging from 10 to 40 wt % of the polymer composition, the rubber and the plasticizer being present at a weight ratio ranging from 1:1 to 1:5,
- wherein the article is selected from the group consisting of boots, shoe soles, monobloc sandals, flip flops, sportive articles, hoses, and automotive parts, and
- wherein the article exhibits a Shore A hardness according to DIN 53505 in the range of 40 to 75 Shore A.
3 more elements
A thermoplastic article comprising a polymer composition comprising:
- an ethylene vinyl acetate copolymer present in the polymer composition in an amount ranging from 30 to 70 wt % of the polymer composition;
- rubber, different from the ethylene vinyl acetate copolymer, present in the polymer composition in an amount ranging from 5 to 30 wt % of the polymer composition;
- and
- a plasticizer present in the polymer composition in an amount ranging from 10 to 40 wt % of the polymer composition, the rubber and the plasticizer being present at a weight ratio ranging from 1:1 to 1:5,
- wherein the article is selected from the group consisting of boots, shoe soles, monobloc sandals, flip flops, sportive articles, hoses, and automotive parts, and
- wherein the article exhibits a Shore A hardness according to DIN 53505 in the range of 40 to 75 Shore A.
3 more elements
A boot comprising a polymer composition comprising:
- an ethylene vinyl acetate copolymer present in the polymer composition in an amount ranging from 30 to 70 wt % of the polymer composition;
- rubber, different from the ethylene vinyl acetate copolymer, present in the polymer composition in an amount ranging from 5 to 30 wt % of the polymer composition;
- and
- a plasticizer present in the polymer composition in an amount ranging from 10 to 40 wt % of the polymer composition, the rubber and the plasticizer being present at a weight ratio ranging from 1:1 to 1:5,
- wherein the boot exhibits a Shore A hardness according to DIN 53505 in the range of 40 to 75 Shore A.
2 more elements
A cured article comprising a polymer composition comprising:
- an ethylene vinyl acetate copolymer present in the polymer composition in an amount ranging from 30 to 70 wt % of the polymer composition;
- rubber, different from the ethylene vinyl acetate copolymer, present in the polymer composition in an amount ranging from 5 to 30 wt % of the polymer composition;
- a plasticizer present in the polymer composition in an amount ranging from 10 to 40 wt % of the polymer composition, the rubber and the plasticizer being present at a weight ratio ranging from 1:1 to 1:5;
- and
- a curing agent,
- wherein the article exhibits a Shore A hardness according to DIN 53505 in the range of 40 to 75 Shore A.
3 more elements
A method, comprising:
- mixing an ethylene vinyl acetate copolymer, a rubber different from the ethylene vinyl acetate copolymer, and a plasticizer, wherein the ethylene vinyl acetate copolymer is present in an amount ranging from 30 to 70 wt% of the mixture, the plasticizer is present in an amount ranging from 10 to 40 wt% of the mixture, and the rubber and the plasticizer being present at a weight ratio ranging from 1:1 to 1:5;
- extruding the mixture of ethylene vinyl acetate copolymer, the rubber, and the plasticizer;
- and
- forming an article from the extruded mixture, wherein the article is selected from the group consisting of boots, shoes soles, monobloc sandals, flip flops, sportive articles, hoses, and automotive parts and wherein the article exhibits a Shore A hardness according to DIN 53505 in the range of 40 to 75 Shore A.
1 more element
Dependencies are inferred from the claim text.