Sun Chemical Corporation

Roger Edward Burrows

Shaun Lawrence Herlihy

Derek Ronald Illsley

Robert Stephen Davidson

Compounds of formula (I): {where n is a number from 1 to 6; Ris hydrogen, methyl or ethyl; A represents a group of formula &#x2014;[O(CHRCHR)]&#x2014;, &#x2014;[O(CH)CO]&#x2014;, or &#x2014;[O(CH)CO]&#x2014;[O(CHRCHR)]&#x2014; (where one of Rand Ris hydrogen and the other is hydrogen, methyl or ethyl); a is from 1 to 2; b is from 4 to 5; y is from 3 to 10; Q is a residue of a polyhydroxy compound having 2 to 6 hydroxy groups; and x is greater than 1 but no greater than the number of available hydroxyl groups in Q} and esters thereof are useful as photoinitiators for the preparation of energy-curable compositions, such as varnishes and printing inks.

Multi-functional photoinitiators

A multi-functional photoinitiator of formula (I)&#x2014;()&#x2003;&#x2003;(I)wherein Q is a heteroatom selected from Si, Ti, Zr and Sn or any two independently selected such heteroatoms linked by a covalent bond or a by C(preferably C) alkylene group, n is at least 2 and n+m=the functionality of Q, each Ris the same or different and is a non-photoinitiator group; each group PI is the same or different and is a photoinitiator group. Each &#x2014;A&#x2014; is the same or different and is selected from linking groups of formula &#x2014;(A)&#x2014;Z&#x2014; wherein p has an average of from 1 to 10, preferably from 3 to 5 and the groups &#x2014;A&#x2014; are either (a) each independently selected from Calkyleneoxy groups; or (b) each independently selected from groups of formula &#x2014;O&#x2014;(CH)CO&#x2014; wherein q is from 3 to 5, and Z is selected from &#x2014;O&#x2014;, &#x2014;S&#x2014; and &#x2014;NR&#x2014; where Ris Calkyl.

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Casaletto Vapiro, Italy

Roger Edward Burrows