INK COMPOSITION FOR A NON-STICK COATING AND A COATED SUBSTRATE COMPRISING THE DECORATIVE PATTERN THEREFROM
Disclosed are ink compositions for printing patterns on substrates having non-stick fluororesin coatings. The ink compositions are particularly useful for printing decorative patterns or markings on cookware or bakeware to provide aesthetic and/or functional effects. Also disclosed are coated substrates which comprise non-stick coatings having patterns. Further disclosed are methods of manufacturing the coated substrates comprising non-stick coatings having patterns.
1 . An ink composition for forming a pattern on a non-stick coating, said ink composition comprising:
(a) 25-65 weight % of a fluoropolymer selected from PTFE, PFA, FEP, and mixtures thereof;
(b) 0-25 weight % of a colorant selected from organic pigments, inorganic pigments, and mixtures thereof;
(c) 1-15 weight % of amorphous silica particles;
(d) 1-15 weight % of a nonionic surfactant, wherein the nonionic surfactant comprises at least one aliphatic alcohol ethoxylate, or a mixture thereof; and
(e) 10-50 weight % of a liquid carrier selected from water, water-miscible solvents and mixtures thereof;
wherein the weight % is based on the total weight of the ink composition; and
provided that the ink composition is essentially free of polyamideimide.
2 . The ink composition of claim 1 comprising non-volatile components including:
(a) 30-90 weight % of the fluoropolymer selected from PTFE, PFA, FEP, and mixtures thereof;
(b) 0-50 weight % of the colorant selected from organic pigments, inorganic pigments, and mixtures thereof; and
(c) 2-25 weight % of amorphous silica particles;
wherein the weight % is based on the total weight of the non-volatile components.
3 . (canceled)
4 . The ink composition of claim 1 having a viscosity of 2,000-40,000 mPa·s.
5 . (canceled)
6 . The ink composition of claim 1 , wherein the amorphous silica particles (c) have a BET surface area ranging from 100 to 450 m 2 /g.
7 - 8 . (canceled)
9 . A coated substrate comprising a non-stick coating having a pattern, wherein the non-stick coating comprises:
a primer coat which adheres to the substrate;
optionally, a midcoat;
a pattern which comprises amorphous silica particles; and
a topcoat.
10 . The coated substrate of claim 9 , wherein the pattern comprises:
(i) 30-90 weight % of a fluoropolymer selected from PTFE, PFA, FEP, and mixtures thereof;
(ii) 0-50 weight % of a colorant selected from organic pigments, inorganic pigment, and mixtures thereof; and
(iii) 2-25 weight % of amorphous silica particles;
wherein the weight % is based on the total weight of the pattern, and
provided that said pattern is essentially free of polyamideimide.
11 . The coated substrate of claim 9 , wherein the pattern is formed by applying an ink composition comprising:
(i) 25-65 weight % of a fluoropolymer selected from PTFE, PFA, FEP, and mixtures thereof;
(ii) 0-25 weight % of a colorant selected from organic pigments, inorganic pigment, and mixtures thereof;
(iii) 1-15 weight % of amorphous silica particles;
(iv) 1-15 weight % of a nonionic surfactant, wherein the nonionic surfactant comprises at least one aliphatic alcohol ethoxylate, or a mixture thereof; and
(v) 10-50 weight % of a liquid carrier consisting of water, water-miscible solvents and mixtures thereof;
wherein the weight % is based on the total weight of the ink composition; and
provided that the ink composition is essentially free of polyamideimide.
12 . The coated substrate of claim 9 , wherein the amorphous silica particles have a BET surface area ranging from 100 to 450 m 2 /g.
13 - 14 . (canceled)
15 . The coated substrate of claim 9 , wherein the pattern is a decorative pattern or a marking.
16 . A method for manufacturing a coated substrate comprising a non-stick coating having a pattern, wherein the method comprises:
A) applying a primer composition to a substrate and drying to form a primer coat;
B) optionally, applying a midcoat composition and drying to form a midcoat;
C) curing said primer coat and optional midcoat;
D) applying an ink composition to form a pattern, wherein said pattern comprises amorphous silica particles;
E) applying a topcoat composition and drying to form the topcoat;
F) curing said topcoat.
17 . The method of claim 16 , wherein the ink composition comprises:
(i) 25-65 weight % of a fluoropolymer selected from PTFE, PFA, FEP, and mixtures thereof;
(ii) 0-25 weight % of a colorant selected from organic pigments, inorganic pigment, and mixtures thereof;
(iii) 1-15 weight % of amorphous silica particles;
(iv) 1-15 weight % of a nonionic surfactant, wherein the nonionic surfactant comprises at least one aliphatic alcohol ethoxylate, or a mixture thereof; and
(v) 10-50 weight % of a liquid carrier selected from water, water-miscible solvents and mixtures thereof;
wherein the weight % is based on the total weight of the ink composition; and
provided that the ink composition is essentially free of polyamideimide.
18 . The method of claim 16 , wherein the amorphous silica particles have a BET surface area ranging from 100 to 450 m 2 /g.
19 . The method of claim 16 , wherein the ink composition has a viscosity of 2,000-40,000 mPa·s.
20 . (canceled)
21 . The method of claim 16 , wherein the ink composition is applied by pad printing, screen printing, roller coating or coil coating.
22 . The method of claim 16 , wherein the pattern is a decorative pattern or a marking.