Photocurable composition, process for producing photocurable...

Details Photocurable composition, process for producing photocurable... Photocurable composition, process for producing photocurable...

2005-08-02

2005-08-02

Seidleck, James J. (Department: 1711)

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

Synthetic resins

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

C522S168000, C522S170000, C522S113000, C522S114000, C522S120000, C522S121000, C522S074000, C522S081000, C428S3550RA

Reexamination Certificate

active

06924324

ABSTRACT:
A photocurable composition is provided which yields an excellent tack-free, hard cured product without any addition of photoinitiators. A photocurable composition which is excellent in storage stability is also provided. The photocurable composition contains a resin having an acryloyl group and a chemical structure element selected from the group consisting of β-diketone groups and β-ketoester groups, wherein the β-diketone group or the β-ketoester group has a tetra-substituted carbon atom between two carbonyl groups, which is capable of generating one or two free radicals under photoirradiation, and the photocurable composition does not increase more than 25% in viscosity when heated at 60° C. for 5 days.

REFERENCES:
patent: 6025410 (2000-02-01), Moy et al.
patent: 2335424 (1999-09-01), None
George Odian's, Principles of Polymerization (1970), p. 97.

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