Claims
- 1. A UV curable aqueous alkaline developable, urethane acrylate composition comprising:
- (a) 40-70% by weight of a mixture of
- (i) 20-99% by weight of a urethane acrylkate which has the following formula: ##STR9## where R.sub.1 is aliphatic or cycloaliphatic,
- R.sub.2 and R.sub.3 are alkylene,
- R.sub.4 is aliphatic or cycloaliphatic, saturated or unsaturated, y is 0-4 and n is 1-5, provided that if y, is 0, then n is at least 2; and
- (ii) 1-80% by weight of a urethane diacrylate obtained by reacting a urethane with 2 moles of a hydroxy alkyl acrylate;
- (b) 20-50% by weight of a reactive monomer diluent, and
- (c) 0.5-10% by weight of a photoinitiator.
- 2. A composition according to claim 1 in which y is 1 and n is 1.
- 3. A composition according to claim 1 in which y is 0 and n is 2.
- 4. A composition according to claim 1 wherein said urethane diacrylate is made by reacting a diisocyanate selected from the group consisting of aliphatic, cycloaliphatic and aromatic diisocyanates, with 2 moles of a hydroxyalkyl acrylate.
- 5. A composition according to claim 4 wherein said diisocyanate is an aliphatic diisocyanate.
- 6. A composition according to claim 4 wherein said diisocyanate is a cycloaliphatic diisocyanate.
- 7. A composition according to claim 4 wherein said diisocyanate is an aromatic diisocyanate.
- 8. A composition according to claim 4 wherein said diisocyanate is toluene diisocyanate.
- 9. A composition according to claim 4 wherein said urethane diacrylate has the formula: ##STR10##
- 10. A UV curvable, aqeuous alkaline developable composition according to claim 1 wherein said urethane acrylate compound has the formula: ##STR11##
Parent Case Info
This is a divisional of co-pending application Ser. No. 747,090 filed on June 20, 1985.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4228232 |
Rousseau |
Oct 1980 |
|
4442198 |
Tsao et al. |
Apr 1984 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
747090 |
Jun 1985 |
|