Curable sensitizer, photocurable material, cured product, and material for wiring harness
A curable sensitizer that exhibits a radical-polymerization sensitizing ability that conventional sensitizers do not have in a polymerization reaction using radicals, and is easily available at a low cost, a photocurable material containing the sensitizer, a cured product of the photocurable material, and a material for a wiring harness containing the photocurable material. The curable sensitizer contains an alcohol (meth)acrylate synthesized from an alcohol having one or more hydroxy groups and two or more oxygen atoms in a molecule and a (meth) acrylate ingredient selected from a (meth)acrylic acid and a derivative thereof. An ester bond is formed between one of the hydroxy groups of the alcohol and the (meth)acrylate ingredient. The sensitizer is capable of increasing curability of a curable material when mixed in the material. The photocurable material contains the curable sensitizer and a photoinitiator. The material for the wiring harness contains the photocurable material.
1. A photocurable material consisting essentially of:
an alcohol (meth) acrylate selected from the group consisting of hydroxypropyl acrylate, dipropylene glycol diacrylate, tetraethylene glycol diacrylate, 2-hydroxy-3-acryloyloxy propyl methacrylate, and triacrylate of ethylene oxide modified trimethylolpropane;
a photoinitiator; and
isobornyl acrylate or stearyl methacrylate,
wherein the photoinitiator is 1-hydroxycyclohexyl phenyl ketone or 2-hydroxy-2-methyl-1-phenylpropane-1-one.
2. The photocurable material according to claim 1 , wherein the material contains 1 mass % or more of the alcohol (meth) acrylate.
3. A cured product of the photocurable material according to claim 2 .
4. A material for a wiring harness, the material comprising the photocurable material according to claim 2 .
5. A cured product of the photocurable material according to claim 1 .
6. A material for a wiring harness, the material comprising the photocurable material according to claim 1 .
7. A photocurable material consisting essentially of:
an alcohol (meth) acrylate synthesized from (a) a monovalent alcohol having a hydroxyl group and two or more oxygen atoms in a molecule, and (b) a (meth) acrylate ingredient that is a (meth) acrylic acid or a derivative thereof, by formation of an ester bond between the hydroxyl group of the alcohol and the (meth) acrylate ingredient;
a photoinitiator; and
isobornyl acrylate or stearyl methacrylate,
wherein the material contains 20 to 95% of the alcohol (meth) acrylate.
8. The photocurable material according to claim 1 , wherein the material contains 20 to 95 mass % of the alcohol (meth) acrylate.
9. A method of curing, comprising:
photocuring a (meth) acrylate monomer or oligomer in the presence of the photocurable material according to claim 1 ,
wherein, during photocuring, an unreacted portion of the photoinitiator is activated by radical polymerization independent of irradiation light applied for photocuring.