Photopolymerization of ethylenically-unsaturated organic compounds
AssigneeICI United States Inc.
InventorRobert T. Lu
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Abstract
This invention relates to photopolymerizable compositions comprising an ethylenically unsaturated organic compound and a visible light photosensitizing composition comprising a combination of Mn.sub.2 (CO).sub.10 and a co-catalyst selected from the group consisting of a compound characterized by the formula ##STR1## WHEREIN R.sub.1 is --H, --Br, or --CH.sub.3, R.sub.2 is --H or --CH.sub.3, and R.sub.3 is --H or --CH.sub.3 ; cumene; diisopropyl benzene; alkyl mercaptans containing from 10 to 16 carbon atoms; thiourea; and mixtures thereof and to polymerized products thereof. The invention also provides a process for photopolymerizing ethylenically unsaturated organic compounds with visible light in the range of 4,000 to 7,000 angstroms.
Claims7
A photopolymerizable composition comprising an ethylenically unsaturated compound and a photosensitizing composition comprising a blend of from 0.05% to 5% by weight, based on the weight of ethylenically unsaturated compound, of Mn.sub.2 (CO).sub.10 and from 0.1% to 5% by weight, based on the weight of ethylenically unsaturated compound, of a co-catalyst selected from the group consisting of cumene, diisopropyl benzene, alkyl mercaptans containing from 10 to 16 carbon atoms, and mixtures thereof, wherein the weight ratio of co-catalyst to Mn.sub.2 (CO).sub.10 is from 0.2 to 10.
A composition which is suitable for photosensitizing ethylenically unsaturated compounds to visible light which comprises a mixture of Mn.sub.2 (CO).sub.10 and a co-catalyst selected from the group consisting of cumene, diisopropylbenzene, alkyl mercaptans containing from 10 to 16 carbon atoms, thiourea and mixtures thereof wherein the weight ratio of co-catalyst to Mn.sub.2 (CO).sub.10 is from 0.2 to 10.
Dependencies are inferred from the claim text.