| 摘要 |
PURPOSE: To obtain a protective-layer having excellent adhesive properties to gold by using the same composition as the crosslinking agent of a photopolymer composition containing the crosslinking agent, an UV sensitive polymerization initiator and a thioether compound having a vinyl ester or vinyl amide component and thioether. CONSTITUTION: A photopolymerizable composition comprises a crosslinking agent, a UV sensitive polymerization initiator and a thioether compound having a vinyl ester or vinyl amide component, and the same compound may also be used as the crosslinking agent and thioether. When the composition is spin- coated, exposed to ultraviolet rays and photopolymerized, a protective layer for an optical type recording element is acquired. Since a thioether functional group exists in the compound, the adhesive properties of the protective layer to gold are increased. The composition contains the 0.25-25%(wt.) photopolymerization initiator, the 2-95% crosslinking agent and the 0.5-95% thioether compound. A polymerizable compound, in which a sulfur atom bonds between two carbon atoms, is comprised in the thioehter compound, and thiophenes, thiazoles, thioether acrylates and others are contained. |
