Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Reexamination Certificate
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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Burrows Roger Edward
Herlihy Shaun Lawrence
Illsley Derek Ronald
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