Polymeric dispersants containing (meth)acryloyloxybenzoic acid
View Patent ↗A polymeric dispersant having a block copolymer structure or a segmented oligomer structure wherein the block copolymer structure or segmented oligomer structure includes a segment polymerized by monomers according to Formula (I): wherein; R1 represents hydrogen or methyl; Y represents O, S, or NH; Aryl represents an aromatic group or a heteroaromatic group; and X represents hydrogen, an alkyl group, or a cation. A process for manufacturing the polymeric dispersant and the application of the polymeric dispersant in pigment dispersions, inkjet inks, and colored layers.
1. A polymeric dispersant having a block copolymer structure or a segmented oligomer structure, wherein the block copolymer structure or segmented oligomer structure comprises:
a segment polymerized by monomers according to Formula (I):
wherein;
R1 represents hydrogen or methyl;
Y represents O, S, or NH;
Aryl represents an aromatic group or a heteroaromatic group; and
X represents hydrogen, an alkyl group, or a cation.
2. The polymeric dispersant according to claim 1 , wherein the cation represents ammonium, sodium, potassium, lithium, or a quaternary amine.
3. The polymeric dispersant according to claim 1 , wherein the monomer is represented by Formula (II):
wherein;
R1 represents hydrogen or methyl;
R2, R3, R4, R5, and R6 are each independently selected from the group consisting of hydrogen, alkoxy group, acyl group, carboxylic acid group, carboxylate group, alkyl, and alkenyl; and
at least one of R2, R3, R4, R5, or R6 is a carboxylic acid or a salt thereof.
4. The polymeric dispersant according to claim 1 , wherein the monomer used in a second segment of the polymeric dispersant is a styrene or an acrylate monomer.
5. The polymeric dispersant according to claim 1 , wherein the polymeric dispersant contains at least 20 monomer units in total.
6. A pigment dispersion comprising the polymeric dispersant according to claim 1 .
7. The polymeric dispersant according to claim 3 , wherein the monomer is represented by
8. The polymeric dispersant according to claim 4 , wherein the acrylate monomer is an alkyl acrylate or an aromatic acrylate.
9. The polymeric dispersant according to claim 4 , wherein the acrylate monomer is selected from the group consisting of butylacrylate and benzyl methacrylate.
10. An ink-jet ink comprising the pigment dispersion according to claim 6 .
11. A colored layer coated from a coating solution comprising the pigment dispersion according to claim 6 .
12. The ink-jet ink according to claim to 10 , wherein the ink-jet ink is a radiation curable ink-jet ink.