Benzil ketal derivatives
AssigneeTeijin Limited
InventorsTsuneo Hagiwara, Akihiro Horike
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Abstract
Benzil-di-(.beta.-succinimidoethyl)ketal of the following structural formula ##STR1## and novel benzil ketal derivatives thereof. The novel benzil ketal derivatives are characterized by having a structure in which a 5- or 6-membered cyclic imidecontaining group is bonded to each of the two oxygen atoms of ketal. Because these compounds have a high decomposition or sublimation temperature and the ability to initiate photopolymerization, they are useful as photopolymerization initiators in the production of photopolymerizable shaped articles from a molten blend of a photopolymerizable thermoplastic polymer composition.
Claims14
A benzil ketal derivative of the formula
- where Y.sub.1 and Y.sub.2 are identical or different, and each represents a group selected from the class consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, aryl groups having 6 to 12 carbon atoms, alkoxy groups having 1 to 10 carbon atoms and halogen atoms;
- p and q, independently from each other, are integers of 1 to 3;
- Z.sub.1 and Z.sub.2 are identical or different and represent alkylene groups having 2 to 10 carbon atoms;
- divalent aralkylene groups having the formula:
- --R--Ar--R'--
- wherein R and R' are identical or different alkylene groups having 1 to 5 carbon atoms and --R--Ar--R'-- has 8 to 10 carbon atoms;
- and groups having the formula:
- --CH.sub.2).sub.m Q--CH.sub.2).sub.n wherein Q is ##STR32## --O--, --S--, or a bond, m and n are integers from 1 to 3, R.sub.3 and R.sub.4 represent a hydrogen and a methyl group;
- and ##STR33## represents a 5- membered cyclic imide group in which R.sub.1 and R.sub.2 are identical or different and are selected from the group consisting of:
- --CH.sub.2 --CH.sub.2 --, --CH.dbd.CH--, ##STR34##
A benzil ketal derivative having the formula ##STR35##
Dependencies are inferred from the claim text.