Multi-functional photoinitiators

Details Multi-functional photoinitiators Multi-functional photoinitiators

2007-01-23

2007-01-23

Hamilton, Cynthia (Department: 1752)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C522S905000, C522S035000, C522S036000, C560S052000

Reexamination Certificate

active

10492469

ABSTRACT:
Compounds of formula (I):{where n is a number from 1 to 6; R3is hydrogen, methyl or ethyl; A represents a group of formula —[O(CHR2CHR1)a]y—, —[O(CH2)bCO]y—, or —[O(CH2)bCO](y−1)—[O(CHR2CHR1)a]— (where one of R1and R2is 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.

REFERENCES:
patent: 6263812 (1994-09-01), None
patent: WO 93/16131 (1993-08-01), None
patent: WO 97/07161 (1997-02-01), None
patent: WO 97/49664 (1997-12-01), None

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