Photocurable epoxy compositions containing thiopyrylium salts

Details Photocurable epoxy compositions containing thiopyrylium salts Photocurable epoxy compositions containing thiopyrylium salts

1978-05-09

1979-02-13

Turer, Richard B.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

20415911, 20415914, 20415918, 20415924, 96115P, 427 54, 428418, C08F 246, C08F 400

Patent

active

041396553

ABSTRACT:
This invention relates to photocurable compositions comprising an epoxy resin and a catalytic amount of a photodecomposable thiopyrylium salt of the formula: ##STR1## WHERE R.sub.1, R.sub.2 and R.sub.3 are independently selected from the group consisting of hydrogen, alkyl containing 1 to 10 carbon atoms, cycloalkyl containing 5 to 12 carbon atoms, aryl containing 6 to 12 carbon atoms and substituted derivatives thereof, M is a metal or metalloid, X is a halogen radical, a is a whole number equal to 1 to 10 and n is a whole number equal to 1 to 3.

REFERENCES:
patent: 3816278 (1974-06-01), Watt
patent: 3936557 (1976-02-01), Watt
patent: 4026705 (1977-05-01), Crivello et al.
patent: 4069054 (1978-01-01), Smith

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