Organo-silicon compounds and their use as photoinitiators

Details Organo-silicon compounds and their use as photoinitiators Organo-silicon compounds and their use as photoinitiators

2005-02-01

2005-02-01

Berman, Susan (Department: 1711)

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

Synthetic resins

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

C522S036000, C522S065000, C522S066000, C556S051000, C556S052000, C556S055000, C556S081000, C556S087000, C556S105000, C556S400000, C556S431000, C556S436000, C556S437000, C556S009000, C556S012000

Reexamination Certificate

active

06849668

ABSTRACT:
A multi-functional photoinitiator of formula (I)in-line-formulae description="In-line Formulae" end="lead"?R1m—Q—(A1—PI)n  (I)in-line-formulae description="In-line Formulae" end="tail"?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 C1-16(preferably C1-9) alkylene group, n is at least 2 and n+m=the functionality of Q, each R1is the same or different and is a non-photoinitiator group; each group PI is the same or different and is a photoinitiator group.Each —A1— is the same or different and is selected from linking groups of formula —(A2)p—Z— wherein p has an average of from 1 to 10, preferably from 3 to 5 and the groups —A2— are either (a) each independently selected from C2-4alkyleneoxy groups; or (b) each independently selected from groups of formula —O—(CH2)qCO— wherein q is from 3 to 5, and Z is selected from —O—, —S— and —NR6— where R6is C1-6alkyl.

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