To provide a fluorinated copolymer excellent in low temperature properties and crosslinking property as a fluororubber, and a method for producing it.

A fluorinated copolymer which has units based on tetrafluoroethylene, units based on propylene and units based on a compound represented by the following formula 1, and which has either one or both of iodine atoms and bromine atoms:

CF.sub.2═CFO(R.sup.f1O).sub.nR.sup.f2  formula 1

wherein R.sup.f1 is a C.sub.1-3 perfluoroalkylene group, R.sup.f2 is a C.sub.1-6 perfluoroalkyl group, n is an integer of from 1 to 4, and in a case where n is from 2 to 4, a plurality of R.sup.f1 may be the same or different.

The present invention pertains to a process for manufacturing a semi-crystalline fluoropolymer, to the fluoropolymer obtainable by said process and to uses of said fluoropolymer in various applications.

The present invention provides a binder composition which suppresses a swelling ratio in an electrolyte solution while having sufficient peel strength. The binder composition according to the present invention contains a copolymer including monomer units derived from vinylidene fluoride, a fluorine-containing alkyl vinyl compound, and a crosslinkable monomer; the content of the monomer unit derived from the fluorine-containing alkyl vinyl compound in the copolymer being not less than 2 mass % and less than 10 mass %; and the content of the monomer unit derived from the crosslinkable monomer being less than 5 mass %.

The invention pertains to a (per)fluoroelastomer composition comprising: a (per)fluoroelastomer [fluoroelastomer (A)]; and at least one (per)fluoropolyether additive [polymer (E)] comprising a (per)fluoropolyether chain comprising recurring units having at least one catenary ether bond and at least one fluorocarbon moiety, and comprising at least one chain end comprising at least one per(halo)fluorinated aromatic group [group (Ar.sup.F)], said polymer (E) being comprised in the composition in an amount of 0.5 to 30 phr, with respect to fluoroelastomer (A).

The present invention pertains to a melt-processible fluoropolymer, to a composition comprising the melt-processible fluoropolymer, to a process for manufacturing the melt-processible fluoropolymer and to uses of the melt-processible fluoropolymer in various applications.

Curable fluoropolymer containing repeating units derived from VDF and TFE and at least one other fluorinated comonomer and further containing CF.sub.2CH.sub.2I end groups and branching sites derived from one or more perfluorinated bisolefinic ether(s) used as modifier(s), wherein the one or more perfluorinated bisolefinic ether(s) used as modifier(s) correspond to the general formula: CF.sub.2CF(CF.sub.2).sub.nO(R.sub.1)O(CF.sub.2).sub.mCFCF.sub.2 wherein n and m are independent from each other either 1 or 0 and wherein R.sub.1 represents a perfluorinated linear or branched, cyclic or acyclic aliphatic or aromatic hydrocarbon residue that may be interrupted by one or more oxygen atoms and comprises up to 30 carbon atoms. Further provided are methods of making the curable fluoropolymers and for making an article containing the curable polymers.

Curable fluoropolymer containing repeating units derived from VDF and TFE and at least one other fluorinated comonomer and further containing CF.sub.2CH.sub.2I end groups and branching sites derived from one or more perfluorinated bisolefinic ether(s) used as modifier(s), wherein the one or more perfluorinated bisolefinic ether(s) used as modifier(s) correspond to the general formula: CF.sub.2CF(CF.sub.2).sub.nO(R.sub.1)O(CF.sub.2).sub.mCFCF.sub.2 wherein n and m are independent from each other either 1 or 0 and wherein R.sub.1 represents a perfluorinated linear or branched, cyclic or acyclic aliphatic or aromatic hydrocarbon residue that may be interrupted by one or more oxygen atoms and comprises up to 30 carbon atoms. Further provided are methods of making the curable fluoropolymers and for making an article containing the curable polymers.

The present invention pertains to a melt-processible fluoropolymer, to a composition comprising said melt-processible fluoropolymer, to a process for manufacturing said melt-processible fluoropolymer and to uses of said melt-processible fluoropolymer in various applications.

The present invention pertains to a method for manufacturing a melt-processible fluoropolymer, to the melt-processible fluoropolymer obtainable by said process and to uses of said melt-processible fluoropolymer in various applications.

Copolymers of one or more halogenated olefins and one or more halogenated co-monomers selected from the group consisting of halogenated alkenyl ethers, halogenated alkenyl esters, and halogenated (meth)acrylates are useful in various end-use applications wherein the presence of halogen (e.g., fluorine) in the copolymer imparts one or more desirable properties, as compared to analogous copolymers not containing halogen.