A photoradical polymerization initiator that is environmentally friendly and composed solely of carbon, hydrogen and oxygen atoms, generating no acid that may cause corrosion during a radical polymerization reaction, and having a high radical polymerization initiation capacity to light having a wavelength of 350 nm to 420 nm. A photoradical polymerizable composition including a radical polymerizable compound and a photoradical polymerization initiator, where the photoradical polymerization initiator is a 1,4-dihydroxy-2-naphthoic acid compound represented by formula (1):

##STR00001##

where R is a hydrogen atom, a C.sub.1-10 alkyl group or a C.sub.6-14 aryl group, and X is a hydrogen atom, a C.sub.1-10 alkyl group, a C.sub.6-14 aryl group, a hydroxy group, a C.sub.1-10 alkoxy group or a C.sub.6-14 aryloxy group.

A photoradical polymerization initiator that is environmentally friendly and composed solely of carbon, hydrogen and oxygen atoms, generating no acid that may cause corrosion during a radical polymerization reaction, and having a high radical polymerization initiation capacity to light having a wavelength of 350 nm to 420 nm. A photoradical polymerizable composition including a radical polymerizable compound and a photoradical polymerization initiator, where the photoradical polymerization initiator is a 1,4-dihydroxy-2-naphthoic acid compound represented by formula (1):

##STR00001##

where R is a hydrogen atom, a C.sub.1-10 alkyl group or a C.sub.6-14 aryl group, and X is a hydrogen atom, a C.sub.1-10 alkyl group, a C.sub.6-14 aryl group, a hydroxy group, a C.sub.1-10 alkoxy group or a C.sub.6-14 aryloxy group.

The present invention relates to a homogeneous liquid/fluid combination of photoinitiators with improved formulability, reactivity and surface curing performances, more particularly to novel combinations of acylphosphine oxides and ketocoumarins, optionally further combined with at least one co-initiator.

A liquid crystal panel according to one embodiment includes a first substrate, a second substrate opposed to the first substrate, a sealing member bonding the first substrate and the second substrate, and a liquid crystal layer sealed between the first substrate and the second substrate by the sealing member. The sealing member includes a ten-hour half-life temperature of 95° C. or lower and an acrylic resin. The liquid crystal layer includes a macromolecular compound.

A method of producing a heat-resistant crosslinked fluororubber formed body, including a step (1) of melt-mixing, with respect to 100 mass parts of base rubber containing 40 to 98 mass % of fluororubber and 2 to 40 mass % of ethylene/tetrafluoroethylene copolymer resin, 0.003 to 0.5 mass parts of organic peroxide, 0.5 to 400 mass parts of inorganic filler, 2 to 15 mass parts of a specific silane coupling agent, and silanol condensation catalyst, and including a step (a) of melt-mixing a part of the base rubber, the organic peroxide, the inorganic filler and the silane coupling agent at a temperature equal to or higher than a decomposition temperature of said organic peroxide, and a step (b) of melt-mixing a remainder of the base rubber, and the silanol condensation catalyst, and the fluororubber and the ethylene/tetrafluoroethylene copolymer resin are melt-mixed in any of the steps (a) and (b).

A method of producing a heat-resistant crosslinked fluororubber formed body, including a step (1) of melt-mixing, with respect to 100 mass parts of base rubber containing 40 to 98 mass % of fluororubber and 2 to 40 mass % of ethylene/tetrafluoroethylene copolymer resin, 0.003 to 0.5 mass parts of organic peroxide, 0.5 to 400 mass parts of inorganic filler, 2 to 15 mass parts of a specific silane coupling agent, and silanol condensation catalyst, and including a step (a) of melt-mixing a part of the base rubber, the organic peroxide, the inorganic filler and the silane coupling agent at a temperature equal to or higher than a decomposition temperature of said organic peroxide, and a step (b) of melt-mixing a remainder of the base rubber, and the silanol condensation catalyst, and the fluororubber and the ethylene/tetrafluoroethylene copolymer resin are melt-mixed in any of the steps (a) and (b).

Provided is an anti-reflection coating composition. The anti-reflection coating composition includes an active component and a solvent B. The active component includes a matting resin A, a catalyst C, and a crosslinking agent D. The weight average molecular weight of the matting resin A is less than or equal to 20000. Also provided is use of the anti-reflection coating composition.

Provided is an anti-reflection coating composition. The anti-reflection coating composition includes an active component and a solvent B. The active component includes a matting resin A, a catalyst C, and a crosslinking agent D. The weight average molecular weight of the matting resin A is less than or equal to 20000. Also provided is use of the anti-reflection coating composition.

The present invention relates to a method for the radical polymerization or copolymerization of ethylene at high pressures using a hydroxylamine ester as radical initiator. The hydroxylamine esters according to the invention are suitable initiators for the high pressure polymerization of ethylene leading to high molecular weight polyethylenes with narrow molecular weight distributions (Poyldispersity Index PD=1, 2-4.5).

The present invention relates to a method for the radical polymerization or copolymerization of ethylene at high pressures using a hydroxylamine ester as radical initiator. The hydroxylamine esters according to the invention are suitable initiators for the high pressure polymerization of ethylene leading to high molecular weight polyethylenes with narrow molecular weight distributions (Poyldispersity Index PD=1, 2-4.5).