Radiation curable compositions for coating and imaging processes and method of use
AssigneeW. R. Grace & Co.
InventorsArthur Donald Ketley, Paul Richard Hein, Michael Wen-Chien Yang
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Abstract
This invention relates to a liquid radiation curable composition useful for coating and imaging which comprises (1) an acrylic or methacrylic terminated, urethane containing polyene, (2) a non-water soluble vinyl monomer diluent, preferably an acrylate or methacrylate monomer diluent, (3) a polythiol containing at least two thiol groups per molecule and (4) a photoinitiator. The composition on exposure to radiation, e.g., a U.V. light source, cures to a solid polythioether.
Claims8
A liquid radiation curable composition comprising
- (1) 10 to 80% by weight of an acrylic or methacrylic terminated, urethane containing polyene,
- (2) 5 to 60% by weight of a non-water soluble vinyl monomer diluent,
- (3) 0.1 to 35% by weight of a polythiol and
- (4) 0.01 to 10% by weight of a photoinitiator,
- which forms a solid cured polythioether on exposure to actinic or high energy ionizing radiation.
The process of forming a printing plate which comprises exposing to actinic radiation projected through an image-bearing transparency selected portions of a radiation curable composition comprising
- (1) 10 to 80% by weight of an acrylic or methacrylic terminated, urethane containing polyene,
- (2) 5 to 60% by weight of a non-water soluble vinyl monomer diluent,
- (3) 0.1 to 35% by weight of a polythiol and
- (4) 0.01 to 10% by weight of a photoinitiator for a time sufficient to insolubilize the radiation curable composition in the exposed portions and thereafter removing the unexposed radiation curable composition.
The process of forming a coating on a substrate which comprises applying to the surface of a substrate a layer of a composition comprising
- (1) 10 to 80% by weight of an acrylic or methacrylic terminated, urethane containing polyene,
- (2) 5 to 60% by weight of a non-water soluble vinyl monomer diluent,
- (3) 0.1 to 35% by weight of a polythiol and
- (4) 0.01 to 10% by weight of a photoinitiator and thereafter exposing the layer to actinic radiation thereby curing said composition.
The process of forming a coating on a substrate which comprises applying to the surface of a substrate a layer of a composition comprising
- (1) 10 to 80% by weight of an acrylic or methacrylic terminated, urethane containing polyene,
- (2) 5 to 60% by weight of a non-water soluble vinyl monomer diluent and
- (3) 0.1 to 35% by weight of a polythiol and thereafter exposing the layer to high energy ionizing radiation thereby curing said composition.
Dependencies are inferred from the claim text.