Borate photoinitiators from polyboranes

Details Borate photoinitiators from polyboranes Borate photoinitiators from polyboranes

1996-11-21

1998-09-15

Berman, Susan W.

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

Synthetic resins

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

522 6, 522 12, 522 30, 522 26, 522 49, 522 50, 522 53, 522 57, 522 58, 522 59, 522 63, 522 64, 522 65, 522 66, 522 67, 522 68, 522 70, 522 96, 522121, 568 3, 568 4, 568 5, 528 4, 528 5, 528 6, 528 7, C08F 248, C08F 250, C08F 452, C07F 502

Patent

active

058079050

ABSTRACT:
Compounds of the formula I ##STR1## in which n and o are a number from 0 to 50, m is a number from 1 to 50, u and v are 0 or 1, and at least one of the indices u and v is 1, R.sub.1, R.sub.2, R.sub.2a, R.sub.3 and R.sub.4 independently of one another are, for example, aromatic hydrocarbons, R.sub.5, if n and o are 0, is for example C.sub.1 -C.sub.12 alkyl and, if n and/or o are greater than 0, or if n and o are 0 and at the same time only one index u or v is 1, R.sub.5 may additionally, for example, be an aromatic hydrocarbon, at least one of the radicals R.sub.1, R.sub.2, R.sub.2a, R.sub.3, R.sub.4 and R.sub.5 being an aromatic hydrocarbon radical which is sterically hindered ortho to the boron atom, X is, for example, C.sub.1 -C.sub.20 alkylene, phenylene, biphenylene, etc., and Z is a radical which is able to form positive ions, are suitable as photoinitiators, both the compounds per se and their combination with dyes or other electron acceptors. Furthermore, the polyborane precursors of these borates possess, together with borate salts, photoinitiating properties.

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