| 摘要 |
PROBLEM TO BE SOLVED: To provide a photocurable resin composition, especially one for gaskets which gives a photocured product hardly volatilizing a low molecular weight compound and is excellent in resistance to thermal aging and suitable for a precision mechanical equipment such as a magnetic hard disk drive unit (HDD). SOLUTION: This resin composition mainly comprises (A) a urethane (meth)acrylate oligomer, (B) a (meth)acrylate monomer, (C) a photopolymerization initiator having a polymerizable ethylenic unsaturated bond or a high molecular weight photopolymerization initiator prepared by polymerizing ethylenic unsaturated bonds, and (D) a photosensitizer having an amino group and a polymerizable ethylenic unsaturated bond. COPYRIGHT: (C)2004,JPO
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