Thick, composite parts made from photopolymerizable compositions

Details Thick, composite parts made from photopolymerizable compositions Thick, composite parts made from photopolymerizable compositions

1995-06-06

1999-01-05

Berman, Susan W.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Polymerizing, cross-linking, or curing

264496, 522 25, 522 43, 522100, 522103, 522 7, 522 8, 522 11, 522 12, 522 44, 522 33, 522 83, 522181, 522188, 522170, 428417, B29C 3508, C08F 250

Patent

active

058558373

ABSTRACT:
A novel method for producing thick composite parts based upon photopolymerizable compositions is disclosed. The constituents of the photopolymerizable mixture comprise a monomer or monomers capable of polymerizing by free radical or cationic mechanisms, and a photoinitiator system which possesses an absorbance characteristic which is effectively reduced, or self-eliminating, upon initiation of the polymerization reaction. Parts having thicknesses up to 2 cm and thicker for varying end use applications are made by photopolymerizing such compositions. In addition, using such compositions composite parts can be made using a reinforcement material such as a glass fiber mat present in an amount by weight of from about 5 to about 70%.

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Nelson et al., "The Role of the Triplet State in the Photosensitization of Cationic Polymerizations by Anthracene," J. Polymer Sci., 33, 247-256 (1995).

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