FLUOROTHERMOPLASTIC POLYMER COMPOSITIONS

Described herein is a composition comprising (i) a hydrofluorothermoplastic polymer, wherein the hydrofluorothermoplastic polymer is derived from: (a) 50-85 mol % tetrafluoroethene; (b) 2-15 mol % hexafluoropropene; (c) 10-35 mol % vinylidene fluoride; and (d) 0.1 to 5 mol % of a bromine-containing monomer; and (ii) a perhalogenated thermoplastic polymer. Such compositions can be used in multilayer constructions in, for example, fuel hose applications. 1. A composition comprising (a) 50-85 mol % tetrafluoroethene;', '(b) 2-15 mol % hexafluoropropene;', '(c) 10-35 mol % vinylidene fluoride; and', '(d) 0.1 to 5 mol % of a bromine-containing monomer; and, '(i) a hydrofluorothermoplastic polymer, wherein the hydrofluorothermoplastic polymer is derived from(ii) a perhalogenated thermoplastic polymer having a melting point of 150 to 315° C.with the ratio of the hydrofluorothermoplastic polymer to the perhalogenated thermoplastic polymer on a mass to mass basis of 10:90 and 90:10.2. The composition according to claim 1 , wherein the perhalogenated thermoplastic polymer is selected from FEP claim 1 , PFA claim 1 , and a homopolymer or copolymer comprising CTFE.3. The composition of claim 1 , wherein the composition comprises a blend of the hydrofluorothermoplastic polymer and the perhalogenated thermoplastic polymer.4. The composition of claim 1 , wherein the composition comprises a core-shell particle claim 1 , wherein (i) the core comprises the perhalogenated thermoplastic polymer and the shell comprises the hydrofluorothermoplastic polymer or (ii) the core comprises the hydrofluorothermoplastic polymer and the shell comprises the perhalogenated thermoplastic polymer.5. The composition of claim 1 , wherein the hydrofluorothermoplastic polymer is further derived 0.1-5 mol % of a fluorinated allyl ether monomer and/or fluorinated vinyl ether monomer.6. The composition of claim 1 , wherein the composition has a permeation constant of less than 2.5 g mm/md when measured at 60 ...

FLUOROTHERMOPLASTIC POLYMER

Described herein is a composition comprising a fluorothermoplastic polymer, wherein the fluorothermoplastic polymer is derived from: (a) 60-85 mol % tetrafluoroethene; (b) 2-12 mol % hexafluoropropene; (c) 10-30 mol % vinylidene fluoride; (d) 0.2 to 5 mol % of a bromine-containing monomer. Such compositions can be used in multilayer constructions in, for example, fuel hose applications.

DRY POWDER BLENDS OF AMORPHOUS PERFLUORINATED POLYMERS, METHODS OF MAKING THE SAME, AND ARTICLES DERIVED FROM THE DRY POWDER BLENDS

Described herein is a method of making a curable perfluoroelastomer, wherein the curable perfluoroelastomer comprises particles of a semi crystalline fluoropolymer, wherein the semi crystalline fluoropolymer is a TFE copolymer comprising no more than 1 wt % of at least one additional fluorinated monomer. The method comprises: (a) obtaining an amorphous perfluoropolymer and the particles of the semi crystalline fluoropolymer; and (c) dry blending the amorphous perfluoropolymer and the particles to form a curable perfluoroelastomer. 1. A dry powder blend comprising (i) an amorphous perfluoropolymer comprising a cure site selected from the group consisting of —CN , —I , and —Br , and (ii) a plurality of semi crystalline fluoropolymer particles , wherein the semi crystalline fluoropolymer particles comprise a tetrafluoroethylene copolymer comprising no more than 1 wt % of at least one additional fluorinated monomer as determined by Fourier Transform-Infrared spectrometry , wherein the semi crystalline fluoropolymer particles (i) have an melt flow index (372° C. with 2.16 kg) of less than 50 g/10 min or (ii) are not melt processible and have an standard specific gravity of less than 2.200.2. The dry blend of claim 1 , wherein the blend has a melting temperature and the melting temperature of the blend is at least 3° C. lower than the melting point of the semi crystalline fluoropolymer particles.3. The dry blend of claim 1 , wherein the melting temperature of the blend is greater than 320° C. and less than 329° C.4. (canceled)5. The dry blend of claim 1 , wherein the dry powder blend has a decomposition temperature claim 1 , and the decomposition temperature at least 500° C. and at most 510° C.6. The dry blend of claim 1 , wherein the dry powder blend has at least one recrystallization point claim 1 , and the at least one recrystallization point is less than 310° C.7. The dry blend of claim 1 , wherein the dry powder blend comprises at least 10 to at most 30 wt % of the ...

COMPOSITION INCLUDING CURABLE FLUOROPOLYMER AND CURATIVE AND METHODS OF MAKING AND USING THEM

The composition includes a curable fluoropolymer having nitrogen-containing cure sites and a curative including an organo onium cation and an anion represented by Formula (I) or Formula (II). The composition is free of metal cations or has not more than 20 parts per million metal cations and free of silicon dioxide or has less than 0.5 percent by weight silicon dioxide, based on the total weight of the composition. In some cases, the composition consists of the curable fluoropolymer and the curative. Shaped articles including the composition, a fluoroelastomer prepared by curing the composition, a method of making a fluoroelastomer article, and a process for making the composition are also described. 2. The composition of claim 1 , wherein the composition comprises not more than 2 ppm of a fluorinated acid or salt thereof having 4 to 18 carbon atoms.3. The composition of claim 1 , wherein the curable fluoropolymer is an amorphous claim 1 , curable fluoropolymer claim 1 , and wherein the composition further comprises a partially crystalline fluoropolymer.5. The composition of claim 4 , wherein the curable fluoropolymer is an amorphous claim 4 , curable fluoropolymer.7. The composition of claim 6 , wherein each R is F claim 6 , and wherein R′ is hydrogen claim 6 , phenyl claim 6 , methoxyphenyl claim 6 , toluyl claim 6 , fluorophenyl claim 6 , trifluoromethylphenyl claim 6 , or trifluoromethyl.8. The composition of claim 6 , wherein the organo onium cation is a tetraalkylphosphonium cation or a tetraalkylammonium cation.9. The composition of claim 6 , wherein the curative is tetrabutylphosphonium 2-p-toluyl-1 claim 6 ,1 claim 6 ,1 claim 6 ,3 claim 6 ,3 claim 6 ,3-hexafluoroisopropanolate.10. The composition of claim 6 , wherein the curable fluoropolymer comprises interpolymerized units of tetrafluoroethylene and at least one of a different perfluorinated olefin claim 6 , a partially fluorinated olefin claim 6 , a non-fluorinated olefin claim 6 , a ...

COMPOSITION INCLUDING AMORPHOUS FLUOROPOLYMER AND FLUOROPLASTIC PARTICLES AND METHODS OF MAKING THE SAME

A composition includes an amorphous fluoropolymer having at least one of: a segment represented by formula I: —CF(R)—(CX)—(CXCXR)—O—R″O—(CXR′CX)—(CX)—CF(R′)— (I); or a terminal segment represented by formula III: R—CF(I)—(CX)—(CXCXR)—O—R″O—(CXR′CX)—(CX)—CF(R′)— (III), and fluoroplastic particles having a mean particle size of less than 500 nanometers. Each X is independently F, H, or Cl; Rand R′are each independently F or a monovalent perfluoroalkyl having 1 to 3 carbon atoms; R is F or a partially fluorinated or perfluorinated alkyl having 1 to 3 carbon atoms; R″is a divalent fluoroalkylene having 1 to 8 carbon atoms or a divalent fluorinated alkylene ether having 1 to 20 carbon atoms and at least one ether linkage; k is 0 or 1; and n, m, p, and q are each independently an integer from 0 to 5, with the proviso that when k is 0, n+m is at least 1 and p+q is at least 1. A method of making the composition is also provided. 1. A composition comprising:fluoroplastic particles having a mean particle size of less than 500 nanometers; and [ {'br': None, 'sub': f', '2', 'n', '2', 'm', 'f', 'k', '2', 'p', '2', 'q', 'f, '—CF(R)—(CX)—(CXCXR)—O—R″—O—(CXR′CX)—(CX)—CF(R′)—\u2003\u2003(I); or'}, 'a segment represented by formula I, {'br': None, 'sub': f', '2', 'n', '2', 'm', 'f', 'k', '2', 'p', '2', 'q, 'sup': 'f', 'R—CF(I)—(CX)—(CXCXR)—O—R″—O—(CXR′CX)—(CX)—CF(R′)—\u2003\u2003(III),'}, 'a terminal segment represented by formula III], 'an amorphous fluoropolymer comprising at least one of each X is independently F, H, or Cl;', {'sub': f', 'f, 'Rand R′are each independently F or a monovalent perfluoroalkyl having 1 to 3 carbon atoms;'}, 'R and R′ are each independently F or a partially fluorinated or perfluorinated alkyl having 1 to 3 carbons atoms;', {'sub': 'f', 'R″is a divalent fluoroalkylene having 1 to 8 carbon atoms or a divalent fluorinated alkylene ether having 1 to 20 carbon atoms and at least one ether linkage;'}, 'k is 0 or 1; and n, m, p, and q are each independently an ...

PEROXIDE-CURED HALOGENATED ELASTOMERS HAVING A SILICON-CONTAINING SUPERFICIAL LAYER

Described herein is curable composition comprising a partially halogenated elastomeric gum comprising a plurality of cure sites selected from at least one of iodine, bromine, and nitrile; a silicon-containing compound; a dehydrohalogenation agent; and a peroxide cure system. Upon curing, a silicon-containing superficial layer forms, which can provide good chemical stability, increased durability, non-tackiness, and a matte finish to the cured elastomer. 1. A curable partially halogenated elastomeric gum composition comprising:(a) a partially halogenated elastomeric gum comprising (i) at least 25% halogen by weight, wherein the halogen is at least one of fluorine and chlorine and (ii) a plurality of cure sites wherein the cure sites are selected from at least one of iodine, bromine, and nitrile;(b) at least 0.01 parts by mass of a silicon-containing compound per 100 parts by mass of the partially halogenated elastomeric gum;(c) a dehydrohalogenation agent; and(d) a curing system, wherein the curing system consists essentially of a peroxide and a coagent.2. The composition of claim 1 , wherein the partially halogenated elastomeric gum is a fluorinated amorphous polymer or a chlorinated amorphous polymer.3. The composition of claim 2 , wherein fluorinated amorphous polymer comprises interpolymerized vinylidene fluoride monomeric units.4. The composition of claim 2 , wherein the fluorinated amorphous polymer comprises at least one of: (i) a copolymer comprising tetrafluoroethylene claim 2 , vinylidene fluoride claim 2 , and hexafluoropropylene monomeric units; (ii) a copolymer comprising tetrafluoroethylene claim 2 , and propylene monomeric units; (iii) a copolymer comprising tetrafluoroethylene claim 2 , vinylidene fluoride claim 2 , and propylene monomeric units; and (iv) a copolymer comprising vinylidene fluoride claim 2 , perfluoro (methyl vinyl) ether claim 2 , and hexafluoropropylene monomeric units; (v) a copolymer comprising tetrafluoroethylene claim 2 , ...

Silicon-containing halogenated elastomers

Described herein is curable composition comprising a halogenated amorphous polymer having at least 25% halogen by weight; at least 0.5 phr of an acid acceptor; at least 0.01 phr of silicon-containing compound; and a dehydrohalogenation cure system. Upon curing, a silicon-containing superficial layer forms, which can provide increased durability, non-tackiness, and a matte finish to the cured elastomer.

Composition including amorphous fluoropolymer and fluoroplastic particles and methods of making the same

A composition includes an amorphous fluoropolymer having at least one of: a segment represented by formula I: -CF(R f )-(CX 2 ) n -(CX 2 CXR) m -O-R" f O k -(CXR'CX 2 ) p -(CX 2 ) q -CF(R' f )- (I); or a terminal segment represented by formula III: R f -CF(I)- (CX 2 ) n -(CX 2 CXR) m -O-R" f O k -(CXR'CX 2 ) p -(CX 2 ) q -CF(R' f )- (III), and fluoroplastic particles having a mean particle size of less than 500 nanometers. Each X is independently F, H, or Cl; R f and R' f are each independently F or a monovalent perfluoroalkyl having 1 to 3 carbon atoms; R is F or a partially fluorinated or perfluorinated alkyl having 1 to 3 carbon atoms; R" f is a divalent fluoroalkylene having 1 to 8 carbon atoms or a divalent fluorinated alkylene ether having 1 to 20 carbon atoms and at least one ether linkage; k is 0 or 1; and n, m, p, and q are each independently an integer from 0 to 5, with the proviso that when k is 0, n + m is at least 1 and p + q is at least 1. A method of making the composition is also provided.

Composition including amorphous fluoropolymer and fluoroplastic particles and methods of making the same

Fluorothermoplastic polymer

Described herein is a composition comprising a fluorothermoplastic polymer, wherein the fluorothermoplastic polymer is derived from: (a) 60-85 mol% tetrafluoroethene; (b) 2-12 mol% hexafluoropropene; (c) 10-30 mol% vinylidene fluoride; (d) 0.2 to 5 mol% of a bromine-containing monomer. Such compositions can be used in multilayer constructions in, for example, fuel hose applications.