Photo-curable/thermally curable composition, method for manufacturing cured product thereof, cured product, and printed wiring board including the same
A photocurable and thermally curable composition having a viscosity suitable for application to an inkjet printer is prepared. By the composition, it is made possible to directly draw a pattern on a substrate for a printed wiring board. The composition is cured at a relatively low temperature, having excellent adhesion, chemical resistance, heat resistance, and insulating properties after curing. The photocurable and thermally curable composition includes a (meth)acryloyl group-containing monomer, a block isocyanate, and a photo-polymerization initiator, wherein the composition is applicable to inkjet printing.
1. A photocurable and thermally curable composition, comprising:
a (meth)acryloyl group-containing monomer;
a photo-polymerization initiator which initiates polymerization of the (meth)acryloyl group-containing monomer; and
a block isocyanate comprising at least one trimer selected from the group consisting of a trimer of 1,6-hexamethylene diisocyanate and a trimer of isophorone diisocyanate in an amount in a range of 2 to 200 parts by weight based on 100 parts by weight of the (meth)acryloyl group-containing monomer.
2. The photocurable and thermally curable composition according to claim 1 , wherein the (meth)acryloyl group-containing monomer comprises at least one polyfunctional (meth)acryloyl group-containing monomer and at least one monofunctional (meth)acryloyl group-containing monomer.
3. The photocurable and thermally curable composition according to claim 1 , further comprising:
a coloring pigment.
4. A cured product obtained by a process comprising:
subjecting the photocurable and thermally curable composition according to claim 1 to pattern printing on a substrate by an inkjet printer to form a composition layer;
irradiating a light to the composition layer to photo-cure the composition layer; and
thermally curing the photo-cured composition layer by heating.
5. A printed wiring board, comprising:
the cured product according to claim 4 .
6. The photocurable and thermally curable composition according to claim 2 , further comprising:
a coloring pigment.
7. A cured product obtained by a process comprising:
subjecting the photocurable and thermally curable composition according to claim 2 to pattern printing on a substrate by an inkjet printer to form a composition layer;
irradiating a light to the composition layer to photo-cure the composition layer; and
thermally curing the photo-cured composition layer by heating.
8. A cured product obtained by a process comprising:
subjecting the photocurable and thermally curable composition according to claim 3 to pattern printing on a substrate by an inkjet printer to form a composition layer;
irradiating a light to the composition layer to photo-cure the composition layer; and
thermally curing the photo-cured composition layer by heating.
9. A printed wiring board, comprising:
the cured product according to claim 7 .
10. A printed wiring board, comprising:
the cured product according to claim 8 .
11. The photocurable and thermally curable composition according to claim 1 , wherein the block isocyanate trimer is blocked by at least one blocking agent selected from the group consisting of ethanol, n-propanol, isopropanol, t-butanol, isobutanol, phenol, chlorophenol, cresol, xylenol, p-nitrophenol, p-t-butylphenol, p-sec-butylphenol, p-sec-amylphenol, p-octylphenol, p-nonylphenol, 3-hydroxypyridine, 8-hydroxyquinoline, 8-hydroxyquinaldine, diethyl malonate, ethyl acetoacetate, acetylacetone, acetamide, acrylamide, acetanilide, succinimide, maleic imide, 2-ethylimidazole, 2-ethyl-4-methylimidazole, pyrazole, 3-methylpyrazole, 3,5-dimethylpyrazole, 2-pyrrolidone, ε-caprolactam, acetoxime, methyl ethyl ketone oxime, cyclohexanone oxime, acetaldoxime, ethyleneimine, and bisulfite.
12. The photocurable and thermally curable composition according to claim 1 , wherein the block isocyanate trimer is blocked by at least one blocking agent selected from the group consisting of diethyl malonate, ethyl acetoacetate, acetyl acetone, pyrazole, 3-methylpyrazole, and 3,5-dimethylpyrazole.
13. The photocurable and thermally curable composition according to claim 2 , wherein the monofunctional (meth)acryloyl group-containing monomer is included in an amount of from 10 to 400 parts by weight based on 100 parts by weight of the polyfunctional (meth)acryloyl group-containing monomer.
14. The photocurable and thermally curable composition according to claim 1 , further comprising:
titanium oxide.
15. The photocurable and thermally curable composition of claim 1 , wherein the trimer is a trimer of 1,6-hexamethylene diisocyanate blocked by at least one of diethyl malonate and 3,5-dimethylpyrazole.
16. The photocurable and thermally curable composition according to claim 2 , wherein the block isocyanate trimer is blocked by at least one blocking agent selected from the group consisting of ethanol, n-propanol, isopropanol, t-butanol, isobutanol, phenol, chlorophenol, cresol, xylenol, p-nitrophenol, p-t-butylphenol, p-sec-butylphenol, p-sec-amylphenol, p-octylphenol, p-nonylphenol, 3-hydroxypyridine, 8-hydroxyquinoline, 8-hydroxyquinaldine, diethyl malonate, ethyl acetoacetate, acetylacetone, acetamide, acrylamide, acetanilide, succinimide, maleic imide, 2-ethylimidazole, 2-ethyl-4-methylimidazole, pyrazole, 3-methylpyrazole, 3,5-dimethylpyrazole, 2-pyrrolidone, ε-caprolactam, acetoxime, methyl ethyl ketone oxime, cyclohexanone oxime, acetaldoxime, ethyleneimine, and bisulfite.
17. The photocurable and thermally curable composition according to claim 2 , wherein the block isocyanate trimer is blocked by at least one blocking agent selected from the group consisting of diethyl malonate, ethyl acetoacetate, acetylacetone, pyrazole, 3-methylpyrazole, and 3,5-dimethylpyrazole.
18. The photocurable and thermally curable composition according to claim 3 , wherein the monofunctional (meth)acryloyl group-containing monomer is included in an amount of from 10 to 400 parts by weight based on 100 parts by weight of the polyfunctional (meth)acryloyl group-containing monomer.
19. The photocurable and thermally curable composition of claim 2 , wherein the trimer is a trimer of 1,6-hexamethylene diisocyanate blocked by at least one of diethyl malonate and 3,5-dimethylpyrazole.
20. The photocurable and thermally curable composition of claim 18 , wherein the trimer is a trimer of 1,6-hexamethylene diisocyanate blocked by at least one of diethyl malonate and 3,5-dimethylpyrazole.
21. The photocurable and thermally curable composition according to claim 18 , wherein the block isocyanate trimer is blocked by at least one blocking agent selected from the group consisting of diethyl malonate, ethyl acetoacetate, acetylacetone, pyrazole, 3-methylpyrazole, and 3,5-dimethylpyrazole.