The invention pertains to a method of making fluoropolymer dispersions using certain polyfunctional perfluoropolyether derivatives including a plurality of ionisable groups selected from the group consisting of SO.sub.3X.sub.a, PO.sub.3X.sub.a and COOX.sub.a, whereas X.sub.a is H, an ammonium group or a monovalent metal, and whereas said groups are comprised as pendant groups in the perfluoropolyether chain, and to fluoropolymer dispersions therefrom.

The invention relates to a composition based on a thermoplastic fluoropolymer powder, in particular on polyvinylidene fluoride (PVDF) with improved flowability, particularly suitable for manufacturing parts by 3D laser sintering. The invention also relates to a method for agglomerating powder layer by layer, by melting or sintering using said composition. The invention finally relates to a three-dimensional article obtained by implementing said method.

The present application provides a fluoropolymer, a primer slurry, a secondary battery and an electrical apparatus. The fluoropolymer comprises a structural unit derived from a monomer represented by formula I, and a structural unit derived from a monomer represented by formula II. A molar content of the structural unit derived from the monomer represented by the formula I is in a range from 70% to 90% on the basis of the total mole number of the structural units in the fluoropolymer, wherein R.sub.1, R.sub.2, and R.sub.3 are each independently selected from one or more of hydrogen, fluorine, chlorine and fluorine substituted C.sub.1-3 alkyl, R.sub.4, R.sub.5, and R.sub.6 are each independently selected from one or more of hydrogen, and substituted or unsubstituted C.sub.1-5 alkyl, and R.sub.7 is selected from substituted or unsubstituted C.sub.1-9 alkyl.

The present application provides a fluoropolymer, a primer slurry, a secondary battery and an electrical apparatus. The fluoropolymer comprises a structural unit derived from a monomer represented by formula I, and a structural unit derived from a monomer represented by formula II. A molar content of the structural unit derived from the monomer represented by the formula I is in a range from 70% to 90% on the basis of the total mole number of the structural units in the fluoropolymer, wherein R.sub.1, R.sub.2, and R.sub.3 are each independently selected from one or more of hydrogen, fluorine, chlorine and fluorine substituted C.sub.1-3 alkyl, R.sub.4, R.sub.5, and R.sub.6 are each independently selected from one or more of hydrogen, and substituted or unsubstituted C.sub.1-5 alkyl, and R.sub.7 is selected from substituted or unsubstituted C.sub.1-9 alkyl.

Provided are a fluoropolymer, a conductive slurry, a positive electrode plate, a secondary battery, and an electrical apparatus. The fluoropolymer comprises a structural unit derived from a monomer represented by formula I and a structural unit derived from a monomer represented by formula II, wherein R.sub.1, R.sub.2 and R.sub.3 are each independently selected from one or more of hydrogen, fluorine, chlorine and fluorine-substituted C.sub.1-3 alkyl; R.sub.4 and R.sub.5 are selected from hydrogen, substituted or unsubstituted C.sub.1-5 alkyl; and R.sub.6 is selected from one or more of aryl-substituted C.sub.1-5 alkyl, substituted or unsubstituted aryl. The fluoropolymer can improve the filterability, anti-gelling property and storage performance of the conductive slurry, thus significantly broadening a process window of the conductive slurry and improving processability of the conductive slurry.

Provided are a fluoropolymer, a conductive slurry, a positive electrode plate, a secondary battery, and an electrical apparatus. The fluoropolymer comprises a structural unit derived from a monomer represented by formula I and a structural unit derived from a monomer represented by formula II, wherein R.sub.1, R.sub.2 and R.sub.3 are each independently selected from one or more of hydrogen, fluorine, chlorine and fluorine-substituted C.sub.1-3 alkyl; R.sub.4 and R.sub.5 are selected from hydrogen, substituted or unsubstituted C.sub.1-5 alkyl; and R.sub.6 is selected from one or more of aryl-substituted C.sub.1-5 alkyl, substituted or unsubstituted aryl. The fluoropolymer can improve the filterability, anti-gelling property and storage performance of the conductive slurry, thus significantly broadening a process window of the conductive slurry and improving processability of the conductive slurry.

A surfactant, a method for preparing the same and a use thereof are provided. The surfactant is a copolymer, and the comonomers used to prepare the surfactant includes at least one hydrophobic monomer with a structure represented by formula (1) and at least one hydrophilic monomer with a structure represented by formula (2).

An object of the present invention is to provide a photosensitive resin composition having good liquid repellency. The photosensitive resin composition of the present invention at least contains a fluororesin having a crosslinking site, a solvent, and a photopolymerization initiator, and the fluororesin contains a repeating unit derived from a hydrocarbon having a fluorine atom.

An object of the present invention is to provide a photosensitive resin composition having good liquid repellency. The photosensitive resin composition of the present invention at least contains a fluororesin having a crosslinking site, a solvent, and a photopolymerization initiator, and the fluororesin contains a repeating unit derived from a hydrocarbon having a fluorine atom.

A method for producing a perfluoroelastomer, which includes carrying out polymerization of a perfluoromonomer in an aqueous medium in the presence of a polymer (1) having a number average molecular weight of 0.310.sup.4 or more to provide a perfluoroelastomer, the polymer (1) containing a polymerized unit (1) derived from a monomer represented by the following general formula (1):
CX.sub.2CY(CZ.sub.2ORf-A)(1)
wherein X, Y, Z, Rf and A are as defined herein, with the proviso that at least one of X, Y, and Z contains a fluorine atom.