G - Physics – 03 – F
Patent
G - Physics
03
F
96/175
G03F 7/038 (2006.01)
Patent
CA 1334566
An improved photoimagable cationically polymerizable epoxy based coating material is provided. The material includes an epoxy resin system consisting essentially of between about 10% and about 80% by weight of a polyol resin which is a condensation product of epichlorohydrin and bisphenol A having a molecular weight of between about 40,000 and 130,000; between about 20% and about 90% by weight of an epoxidized octafunctional bisphenol A formaldehyde novolak resin having a molecular weight of 4,000 to 10,000; and if flame retardancy is required between about 35% and 50% by weight of an epoxidized glycidyl ether of tetrabromo bisphenol A having a softening point of between about 60°C and about 110°C and a molecular weight of between about 600 and 2,500. To this resin system is added about 0.1 to about 15 parts by weight per 100 parts of resin of a cationic photoinitiator capable of initiating polymerization of said epoxidized resin system upon exposure to actinic radiation; the system being further characterized by having an absorbance of light in the 330 to 700 nm region of less than 0.1 for a 2.0 mil thick film. Optionally a photosensitizer such as perylene and its derivatives or anthracene and its derivatives may be added.
611439
Day Richard A.
Gelorme Jeffrey D.
Russell David J.
Witt Steven J.
International Business Machines Corporation
Saunders Raymond H.
LandOfFree
Composition for photo imaging does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Composition for photo imaging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composition for photo imaging will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1232158