Lithographic ink additives
AssigneeMitsubishi Paper Mills Limited
InventorsToshiro Kondo, Eiji Kanada
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Abstract
Disclosed is an additive for lithographic printing ink improved in flow, drying and interfacial properties. This additive contains a compound having an alkylene oxide unit and of a HLB value of 3 to 13. Further improvement can be attained by the use of additive which contains a combination of at least one compound having an alkylene oxide unit and a hydrocarbon radical of 1 to 8 carbon atoms and at least one compound having an alkylene oxide unit and a hydrocarbon radical of 9 or more carbon atoms, the average HLB value of said combination being 3 to 13.
Claims14
A lithographic printing ink which contains as an ink additive a compound having an alkylene oxide unit and an HLB value of 3 to 13, said compound having the formula
- R--A).sub.m OH
- wherein R represents an unsubstituted aliphatic or aromatic hydrocarbon radical, A represents an alkylene oxide group, and m is an integer of 1 or above.
A lithographic printing ink which contains as an ink additive a combination of (1) at least one compound having the formula R--A).sub.m OH wherein R represents an aliphatic or aromatic hydrocarbon radical of 1 to 8 carbon atoms, A represents an alkylene oxide group and m is an integer of 1 or above and (2) at least one compound having the formula R.sub.1 --A).sub.m OH where R.sub.1 represents an aliphatic or aromatic hydrocarbon radical of 9 or more carbon atoms, A represents an alkylene oxide group and m is an integer of 1 or above, the molar ratio of the compound having a hydrocarbon radical of 1 to 8 carbon atoms to the compound having a hydrocarbon radical of 9 or more carbon atoms is in the range of from 1:5 to 5:1, the average HLB value of said combination being 3 to 13.
Dependencies are inferred from the claim text.