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US 2024/0287260 A1Published application
Soft thermoplastic composition
OwnerMattia BASSI, Martina CORASANITI +1inventors
InventorsMattia BASSI, Martina CORASANITI, Laura PONTA
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Abstract
The present invention pertains to a method of making a latex-blended composition of a fluorinated thermoplastic elastomer and of a (per)fluoroelastomer, to the composition obtained therefrom, and to the use of the same for making shaped parts, said composition possessing an improved softness/mechanical properties compromise.
Claims20
1-15. (canceled)
A method of making a latex-blended composition [composition (C)] comprising:
- a Step (A) a step of mixing:
- an aqueous latex of at least one fluorinated thermoplastic elastomer [polymer (F-TPE)] comprising:
- (i) at least one elastomeric block (A) consisting of a sequence of recurring units, said sequence comprising recurring units derived from at least one fluorinated monomer, said block (A) possessing a glass transition temperature of less than 25° C., as determined according to ASTM D3418, and
- (ii) at least one thermoplastic block (B) consisting of a sequence of recurring units, said sequence comprising recurring units derived from at least one fluorinated monomer, wherein the crystallinity of said block (B) and its weight fraction in the polymer (F-TPE) are such to provide for a heat of fusion of the polymer (F-TPE) of at least 2.5 J/g, when determined according to ASTM D3418;
- and
- an aqueous latex of at least one (per)fluoroelastomer [elastomer (F)] possessing a heat of fusion of less than 2.5 J/g, when determined according to ASTM D3418;
- so as to obtain a latex mixture [mixture (L)];
- and
- a Step (B) of coagulating the said mixture (L), so as to obtain said composition (C).
6 more elements
A composition comprising:
- at least one fluorinated thermoplastic elastomer [polymer (F-TPE)] comprising:
- (i) at least one elastomeric block (A) consisting of a sequence of recurring units, said sequence comprising recurring units derived from at least one fluorinated monomer, said block (A) possessing a glass transition temperature of less than 25° C., as determined according to ASTM D3418, and
- (ii) at least one thermoplastic block (B) consisting of a sequence of recurring units, said sequence comprising recurring units derived from at least one fluorinated monomer, wherein the crystallinity of said block (B) and its weight fraction in the polymer (F-TPE) are such to provide for a heat of fusion of the polymer (F-TPE) of at least 2.5 J/g, when determined according to ASTM D3418;
- and
- at least one (per)fluoroelastomer [elastomer (F)] possessing a heat of fusion of less than 2.5 J/g, when determined according to ASTM D3418;
- wherein the said elastomer (F) is dispersed in the polymer (F-TPE) in a manner such that phase-separated domains and/or not cohered domains of elastomer (F) having a size exceeding 200 nm are substantially absent.
3 more elements
Dependencies are inferred from the claim text.