Claims
- 1. A liquid, UV curable, aqueous alkaline developable urethane acrylate compound comprising the reaction product of two moles each of an aliphatic or cycloaliphatic diisocyanate and a hydroxy extended alkyl acrylate monomer formed by reaction of a hydroxyalkyl acrylate and caprolactone with one mole of an alkylene polyol having 3-6 hydroxyl groups and 3-6 carbon atoms, and at least one-half mole of a dicarboxylic acid or anhydride per mole of said polyol.
- 2. A compound according to claim 1 wherein said diisocyanate is selected from the group consisting of dicyclohexylmethylene diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate.
- 3. A compound according to claim 1 wherein said diisocyanate is dicyclohexylmethylene diisocyanate.
- 4. A compound according to claim 1 wherein said diisocyanate is isophorone diisocyanate.
- 5. A compound according to claim 1 wherein said diisocyanate is hexamethylene diisocyanate.
- 6. A compound according to claim 1 wherein said alkylene polyol is glycerol, trimethylolpropane, 1,2,6-hexanetriol, pentaerythritol, L-arabinose, dipentaerythritol and sorbitol.
- 7. A compound according to claim 1 wherein said alkylene polyol is glycerol.
- 8. A compound according to claim 1 wherein said di-carboxylic acid or anhydride is an unsaturated dicarboxylic acid or anhydride.
- 9. A compound according to claim 8 wherein said dicarboxylic anhydride is maleic anhydride.
- 10. A compound according to claim 1 comprising the reaction product of two moles each of dicyclohexyl methylene diisocyanate and said hydroxy extended alkyl acrylate monomer, and one mole each of glycerol and maleic anhydride.
- 11. A compound according to claim 1 wherein said reaction product is obtained using one mole of a dicarboxylic acid or anhydride per mole of said polyol.
- 12. A compound having the general formula: ##STR5## where n is 1-8, ##STR6## and a is 1-10, R.sub.1 is an aliphatic or cycloaliphatic group,
- m is 2-3,
- R.sub.2 is alkylene C.sub.1 -C.sub.6,
- y is 0-3,
- R.sub.3 is aliphatic or cycloaliphatic, saturated or unsaturated, or aromatic,
- z is 1-3; and
- .ltoreq. m+y+z.ltoreq.6.
- 13. A compound according to claim 12 wherein n is 2-3.
- 14. A compound according to claim 12 wherein;
- R.sub.1 is dicyclohexylmethylene;
- m is 2;
- R.sub.2 is derived from glycerol;
- y is 0 or 1;
- R.sub.3 is derived from maleic anhydride; and
- z is 1.
- 15. A compound which is ##STR7## where a is 1-10, and
- n is 1-8.
- 16. A compound according to claim 12, in which m is 2.
- 17. A compound according to claim 12 wherein m=x, y=0 and z=1.
- 18. A 100% solids, solvent-free, UV Curable aqueous developable composition comprising:
- (a) 10-50% by weight of a urethane acrylate compound which is the reaction product of (i) two moles each of an aliphatic or cycloaliphatic diisocyanate and (ii) a hydroxy extended-alkyl acrylate monomer formed by reaction of a hydroxyalkyl acrylate and caprolactone with (iii) one mole of an alkylene polyol carbon atoms, having 3-6 hydroxyl groups and 3-6 carbon atoms, and (iv) at least one mole of a carboxylic acid or anhydride per mole of said polyol;
- (b) 5-40% by weight of an aromatic urethane diacrylate formed by reaction of one mole of an aromatic diisocyanate and two moles of a hydroxyalkyl acrylate;
- (c) 2-30% by weight of an aliphatic or cycloaliphatic urethane diacrylate formed by reaction of one mole of an aliphatic or cycloaliphatic diisocyanate and two moles of a hydroxyalkyl acrylate;
- (d) 4-60% by weight of one or more reactive monomer diluents; and
- (e) 0.5-10% by weight of a photoinitiator.
- 19. A composition according to claim 18 wherein (a) is 15-30%; (b) is 10-30%; (c) is 5-20% by weight.
- 20. A composition according to claim 18 wherein (a) (i) is selected from dicyclohexylmethylene diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate.
- 21. A composition according to claim 18 wherein (a) (iii) is glycerol, trimethylolpropane, 1,2,6-hexanetriol, pentaerythritol, L-arabinose, dipentaerythritol or sorbitol.
- 22. A composition according to claim 21 wherein (a) (iii) is glycerol.
- 23. A composition according to claim 18 wherein (a)(IV) is an unsaturated dicarboxylic acid or anhydride.
- 24. A composition according to claim 23 wherein said dicarboxylic acid or anhydride is maleic anhydride.
- 25. A composition according to claim 18 wherein (d) includes a hydroxyalkyl acrylate.
- 26. A composition according to claim 18 wherein (d) includes an aryloxyalkyl acrylate.
- 27. A composition according to claim 26 wherein said aryloxyalkyl acrylate is phenoxyethyl acrylate.
- 28. A composition according to claim 18 which also includes 1-15% by weight of one or more of the following: a crosslinker, a pigment or dye, a rheology modifier, a thermal stabilizer, a filler, an adhesion promotor, a flame retardant and a leveling aid.
- 29. A composition according to claim 18 wherein (d) is present in an amount of 10-35% and (e) in 1-3% by weight of said composition.
- 30. The solder mask product of the cured composition of claim 18.
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS
This application is a continuation-in-part of U.S. patent application Ser. No. 735,411, filed May 17, 1985, now U.S. Pat. No. 4,717,740, by the same inventors, and assigned to the same assignee as this application.
US Referenced Citations (9)
Continuation in Parts (1)
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Number |
Date |
Country |
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735411 |
May 1985 |
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