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US 4,070,497 AGranted
Process of applying and curing a plurality of coatings
AssigneePPG Industries, Inc.
InventorsMarco Wismer, Gene Gerek
Life of this patent
Estimating the term…
Abstract
A topcoat is applied over a coating which has been gelled by actinic light and which is curable by ionizing irradiation. The gelled coating and the topcoat are exposed to ionizing irradiation to cure the gelled coating. It is preferred that the topcoat as applied be curable by ionizing irradiation so that it will also be cured during exposure to ionizing irradiation.
Claims27
A method comprising
- a. applying over a coating which has been gelled by actinic light and which is curable by ionizing irradiation, a topcoat;
- and
- b. exposing said gelled coating and said topcoat to ionizing irradiation to cure said gelled coating.
A method comprising
- a. exposing a coating which is gellable by actinic light and curable by ionizing irradiaton, to actinic light to gel said coating;
- b. applying to said gelled coating a topcoat;
- and
- c. exposing said gelled coating and said topcoat to ionizing irradiaton to cure said gelled coating.
1 more element
A method of coating a substrate comprising:
- a. applying to said substrate a coating which is gellable by actinic light and curable by ionizing irradiation;
- b. exposing said coating to actinic light to gel said coating;
- c. applying to said gelled coating a topcoat;
- and
- d. exposing said substrate, said gelled coating and said topcoat to ionizing irradiation to cure said gelled coating.
2 more elements
A method of coating a substrate comprising:
- a. applying to said substrate a coating which is gellable by actinic light and curable by ionizing irradiation;
- b. exposing said coating to actinic light to gel said coating;
- c. sequentially performing steps a and b a further (n-1) times, wherein n is a positive integer;
- d. applying to the gelled coatings a topcoat;
- and
- e. exposing said substrate, said gelled coatings and said topcoat to ionizing irradiation to cure said gelled coatings.
3 more elements
A method of coating a substrate comprising:
- a. applying to said substrate a coating which is gellable by actinic light and curable by ionizing irradiation;
- b. exposing said coating to actinic light to gel said coating;
- c. applying to the previously gelled coating a coating which is gellable by actinic light and curable by ionizing irradiation;
- d. exposing the coating applied in step (c) to actinic light to gel said coating applied in step (c)
- e. sequentially performing steps (c) and (d) a further (n-2) times, wherein n is a positive integer greater than 1, to form n layers of gelled coatings;
- f. applying to the n.sup.th layer of gelled coating of topcoat;
- and
- g. exposing said substrate, said gelled coatings and said topcoat to ionizing irradiation to cure said gelled coatings.
5 more elements
Dependencies are inferred from the claim text.