Low TG soft UV-curable coatings

Details Low TG soft UV-curable coatings Low TG soft UV-curable coatings

1980-12-24

1982-04-13

Hoffman, James R.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 343, 427 36, 427 541, 427163, 264 15, G02B 110, G02B 514, G02B 5172, C03C 2502

Patent

active

043245757

ABSTRACT:
The specification describes radiation cured coatings suitable for coating fiber lightwaveguides. The coatings are relatively low modulus materials that remain rubbery throughout normal environmental temperature ranges. An exemplary coating composition comprises an oligomeric resin, which is a condensation product of a mixture of polypropylene glycols and two units of a O-hydroxy-ethylacrylate N-C aliphatic urethane, mixed with an oligomeric liquid which is a dimethylacrylate of a polyethylene glycol of molecular weight larger than 600, a monomoneric triacrylate, such as trimethylolpropane triacrylate and a photoinitiator. The coatings are free of nomoneric ingredients.

REFERENCES:
patent: 3999834 (1976-12-01), Ohtomo et al.
patent: 4076510 (1978-02-01), Mracek et al.
patent: 4099837 (1978-07-01), Vazirani
patent: 4125644 (1978-11-01), Ketley et al.
patent: 4246299 (1981-01-01), Ohls

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