To provide a powder coating material capable of forming a coating film that is excellent in weather resistance, processability and impact resistance and that improves corrosion resistance of a substrate (in particular, a substrate made of aluminum or of an aluminum alloy).

A powder coating material comprising a powder of a resin composition, wherein the resin composition comprises a fluorinated polymer (A) having a number average molecular weight of from 10,000 to 50,000 and a fluorine content of at least 10 mass %, a resin (B) having a fluorine content of less than 10 mass % or containing no fluorine atom, a curing agent, a plasticizer having a melting point of from 50 to 150 C. and core-shell particles, and wherein the absolute value of the difference between the melting point of the plasticizer and the glass transition temperature of a polymer of a shell portion in the core-shell particles is within 30 C. and the content of the plasticizer is from 5 to 25 parts by mass based on 100 parts by mass of the fluorinated polymer (A).

A resist composition which generates acid upon exposure and exhibits changed solubility in a developing solution under action of acid, the resist composition including: a base component which exhibits changed solubility in a developing solution under action of acid and a fluorine additive component which exhibits decomposability to an alkali developing solution, the fluorine additive component including a fluorine resist component having a structural unit derived from a compound represented by general formula (f1-1) in which W represents a polymerizable group-containing group; Rf.sup.1 and Rf.sup.2 each independently represents a hydrogen atom or an electron-withdrawing group; and Rf.sup.3 represents a hydrocarbon group

##STR00001##

The invention relates to novel linear, semi-crystalline fluoropolymers containing 0.5 to 25 mole percent of at least one vinyl ester monomer unit. At least 40 mole percent of the vinyl ester monomer units are present in the copolymer as single monomer units (not diads or triads or greater) between two fluoromonomer units. The invention also relates to a process for forming the fluoromonomers/vinyl ester copolymer. The fluoropolymer of the invention may be used in applications benefiting from a functional fluoropolymers including as a binder or coating in batteries, or for use in forming hydrophilic membranes and hollow fibers.

Membranes having a permselective active layer of a copolymerized perfluorinated monomer and an non-fluorinated alkylvinylester monomer demonstrate superior selective permeability performance for separating gas mixtures compared to membranes of exclusively perfluorinated polymers. Preferred active layer compositions are copolymers of perfluoro-2,2-dimethyl-1,3 dioxole (PDD) copolymerized with an alkylvinyl ester such as vinyl acetate, and vinyl pivalate, and with alkylvinyl esters that are substantially hydrolyzed to provide copolymerized vinyl alcohol functionality. The membranes can have a thin, high diffusion rate, gutter layer of a fluorinated polymer highly permeable to nitrogen positioned between the active layer and a porous support layer. A novel copolymer effective in selectively permeable membranes is a copolymer of PDD and an alkylvinyl ester compound having the formula H.sub.2C?CHOC(0)R.sup.1 in which R.sup.1 is a linear or branched alkyl group of from 2 to 5 carbon atoms.

Disclosed are LEDs and LED packages, and methods of making them, having improved resistance to infiltration by chemical entities comprising providing a coating on at least a portion of the LED chip or an LED chip package formed by co-polymerization of: (a) one or more hydrofluoroolefin monomer(s) selected from the group consisting of tetrafluoroethylene, hydrofluoroethylenes, hydrofluoropropenes, hydrofluorobutenes, hydrofluoropentenes and combinations of these; (b) optionally one or more chlorofluoroethylene monomers; (c) optionally one or more vinyl ester monomer(s); and (d) optionally one or more vinyl ether monomer(s), wherein at least a portion of said vinyl ether monomer is preferably a hydroxyl group-containing vinyl ether monomer and preferably at least one of (b) and (d) is present.

Provided is a paint composition which can give a coating having excellent stretchability and further having excellent contamination resistance. A solvent-based paint composition comprises a fluorocopolymer (I), and an organic solvent (II), the fluorocopolymer (I) including: a perhaloolefin structural unit (a) that contains two carbon atoms, a vinyl acetate structural unit (b), a hydroxyl group-containing vinyl monomer structural unit (c) represented by the following formula (1): CH.sub.2CHO(CH.sub.2).sub.nOH wherein n is an integer of 2 or more, and a carboxyl group-containing monomer structural unit (d) represented by the following formula (2): R.sup.1R.sup.2CCR.sup.3(CH.sub.2).sub.mCOOH wherein R.sup.1, R.sup.2, and R.sup.3 are the same as or different from one another, and each a hydrogen atom or a C1-C10 linear or branched alkyl group; and m is an integer of 2 or more.

An actinic ray-sensitive or radiation-sensitive resin composition includes a resin (A) containing a repeating unit represented by General Formula (4) and a crosslinking agent (C) containing a polar group, in which the crosslinking agent (C) is a compound represented by General Formula (1) or a compound in which two to five structures represented by General Formula (1) are connected via a linking group or a single bond represented by L.sub.1 in General Formula (3). ##STR00001##

Disclosed is a blend prepared by mixing a prepolymer and a vinyl monomer, wherein the prepolymer is prepared by a condensation reaction between a first compound represented by the formula ArH, where Ar comprises (a) a crosslinkable moiety at one end, (b) a moiety selected from the group consisting of O, S, COO, CO, COS, SO.sub.2, and NH, and (c) one or two repeating units selected from the group consisting of: ##STR00001##
where A is carbon or nitrogen, and X is hydrogen or halogen; and a second compound consisting of an aromatic moiety. Additionally disclosed is a polymer sheet that is a crosslinked product composed of the blend.

To provide a photocurable fluorinated polymer composition which has a high curing rate, shows little shrinkage before and after photocuring and requires no post treatment such as heat treatment after photocuring and whereby it is possible to obtain a cured resin excellent in heat resistance and weather resistance. According to the photocurable fluorinated polymer composition comprising a fluorinated polymer (A) containing polymerized units derived from a fluoroolefin and polymerized units derived from an unsaturated monomer having an oxetanyl group or a substituted oxetanyl group, and a photoreaction initiator (B), of the present invention, it is possible to provide a photocurable fluorinated polymer composition which has a high curing rate, shows little shrinkage before and after photocuring and requires no post treatment such as heat treatment after photocuring and whereby it is possible to obtain a cured resin excellent in heat resistance and weather resistance.

A fluoroelastomer comprising a copolymer of fluoroolefin monomers selected from one or more of the group consisting of 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene and 1-chloro-3,3,3-trifluoropropene, and ethylenically unsaturated co-monomers; wherein the fluoroelastomer has a glass transition temperature (Tg) of from about 60 C. to about 53 C. A process of making the fluoroelastomer.