| 摘要 |
PURPOSE:A photosetting composition for coating that is composed of a radically crosslinkable monomer, 4,4-bis(diethylamino)benzophenone and 4-dialkylaminoacetophenone and a photopolymerization initiator, thus having improved photopolymerization initiating power. CONSTITUTION:A monomer having a radically crosslinkable ethylenic double bond and/or its prepolymer are combined with a photoactivating agent consisting of 4,4'-bis(diethylamino)benzophenone and 4-dialkylaminoacetophenone (where the alkyl group is methyl or ethyl at a weight ratio of 10:1-1:10 and a photopolymerization initiator strongly absorbing ultraviolet rays of 230-330nm wave length. The proportion between the photoactivating agent and the photopolymerization initiator is 5:1-1:100, preferably 3:1-1:5 by weight. |
