Coating processes – Electrical product produced – Welding electrode
Patent
1975-11-24
1977-02-01
Newsome, John H.
Coating processes
Electrical product produced
Welding electrode
96 362, 260 775CR, 260859R, 260874, 427 43, 427 44, 427 53, 156656, 156643, B05D 306
Patent
active
040062708
ABSTRACT:
Novel styrene-allyl alcohol copolymer based solid polyene compositions which when mixed with liquid polythiols can form solid curable polyene-polythiol systems. These solid polyenes, containing at least two reactive carbon-to-carbon unsaturated bonds, are urethane or ester derivatives of styrene-allyl alcohol copolymers. The solid polyenes are prepared by treating the hydroxyl groups of a styrene-allyl alcohol copolymer with a reactive unsaturated isocyanate, e.g., allyl isocyanate or a reactive unsaturated carboxylic acid, e.g., acrylic acid. Upon exposure to a free radical generator, e.g., actinic radiation, the solid polyene-polythiol compositions cure to solid, insoluble, chemically resistant, cross-linked polythioether products. Since the solid polyene-liquid polythiol composition can be cured in a solid state, such a curable system finds particular use in preparation of coatings, imaged surfaces such as photoresists, particularly solder-resistant photoresists, printing plates, etc.
REFERENCES:
patent: 2894938 (1959-07-01), Chapin et al.
patent: 3662023 (1972-05-01), Kehr et al.
patent: 3694415 (1972-09-01), Honda et al.
Newsome John H.
Plunkett Richard P.
Prince Kenneth E.
W. R. Grace & Co.
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