A rubber composition comprising: (a) a crosslinking reactive fluorine-containing rubber; (b) a compound represented by the following formula (b-1): and

##STR00001## (c) a compound represented by the following formula (c-1):

##STR00002##

A method for producing an aqueous dispersion of a fluorine-containing elastomer, which includes polymerizing a fluorine-containing monomer in the presence of a fluorine-free compound (1) represented by general formula (1): CR.sup.1X.sup.1═CX.sup.2—R.sup.2—COOM and an aqueous medium, to produce an aqueous dispersion of the fluorine-containing elastomer containing —CH.sub.2— in a main chain. Also disclosed is an aqueous dispersion of the fluorine-containing elastomer and a composition containing the fluorine-containing elastomer.

A method for producing an aqueous dispersion of a fluorine-containing elastomer, which includes polymerizing a fluorine-containing monomer in the presence of a fluorine-free compound (1) represented by general formula (1): CR.sup.1X.sup.1═CX.sup.2—R.sup.2—COOM and an aqueous medium, to produce an aqueous dispersion of the fluorine-containing elastomer containing —CH.sub.2— in a main chain. Also disclosed is an aqueous dispersion of the fluorine-containing elastomer and a composition containing the fluorine-containing elastomer.

A resin composition containing a polycarbonate resin and a fluorine-containing copolymer. The fluorine-containing copolymer is a copolymer containing a polymerized unit based on tetrafluoroethylene in an amount of 75% by mass or more of all polymerized units and at least one selected from a polymerized unit based on hexafluoropropylene and a polymerized unit based on a perfluoro(alkyl vinyl ether) in an amount of 2% by mass or more. Also disclosed is a molded article formed from the resin composition, the polycarbonate resin constituting a continuous phase and the fluorine-containing copolymer constituting a dispersed phase having an average particle size of 0.01 to 2.5 μm.

A resin composition containing a polycarbonate resin and a fluorine-containing copolymer. The fluorine-containing copolymer is a copolymer containing a polymerized unit based on tetrafluoroethylene in an amount of 75% by mass or more of all polymerized units and at least one selected from a polymerized unit based on hexafluoropropylene and a polymerized unit based on a perfluoro(alkyl vinyl ether) in an amount of 2% by mass or more. Also disclosed is a molded article formed from the resin composition, the polycarbonate resin constituting a continuous phase and the fluorine-containing copolymer constituting a dispersed phase having an average particle size of 0.01 to 2.5 μm.

The present invention aims to provide a resin composition capable of providing a molded article that has high slidability and high impact resistance, as well as excellent tensile strength. The present invention relates to a resin composition containing an aromatic polyether ketone resin (I) and a fluororesin (II). The composition preferably has a sodium content of 120 ppm or less relative to the composition or a calcium content of 15 ppm or less relative to the composition.

The present invention aims to provide a resin composition capable of providing a molded article that has high slidability and high impact resistance, as well as excellent tensile strength. The present invention relates to a resin composition containing an aromatic polyether ketone resin (I) and a fluororesin (II). The composition preferably has a sodium content of 120 ppm or less relative to the composition or a calcium content of 15 ppm or less relative to the composition.

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.

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.

Described herein is a latex blend comprising (i) an amorphous perfluoropolymer and (ii) an aqueous dispersion of semi crystalline fluoropolymer particles, wherein the particles comprise a TFE homopolymer or a TFE copolymer comprising no more than 1 wt % of a second fluorinated monomer, wherein the semi crystalline fluoropolymer particles (a) have an MFI (372° C. with 2.16 kg) of less than 50 g/10 min or (b) are not melt processible and have an SSG of less than 2.190, wherein the semi crystalline fluoropolymer particles have an average diameter greater than 100 nm.