Aqueous pigment dispersions with components to interact with cellulose

Patent metadata

Field	Value
Publication number	US-9815994-B2
Application number	US-201414907127-A
Country	US
Kind code	B2
Filing date	Aug 4, 2014
Priority date	Aug 6, 2013
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

Aqueous pigment dispersions having monomers in the polymeric dispersant capable of interacting with cellulose are described. These monomers include the ones having a structure of Formula (I):

wherein W is O or NH;
R 1 is C 1 -C 8 alkyl; and
R 2 , R 3 , R 4 , R 5 and R 6 are independently H or C 1 -C 5 alkyl.

First claim

What is claimed is:

1. An aqueous pigment dispersion comprising a pigment, an aqueous carrier and a polymeric dispersant to disperse said pigment; wherein said polymeric dispersant is a random or structured polymer and comprising at least three monomers A, B and C; wherein monomer A is a hydrophobic acrylate monomer, monomer B is a hydrophilic acrylic monomer, and monomer C is an acrylate monomer having a structure of Formula (I):

wherein W is O or NH;
R 1 is C 1 -C 8 alkylene;
R 2 , R 3 , R 4 , R 5 and R 6 are independently H or C 1 -C 5 alkyl,
provided that when W is O, R 1 is other than C 2 H 4 or C 3 H 6 and both of R 2 and R 3 are H or C 1 -C 5 alkyl.

2. The pigment dispersion of claim 1 , wherein said monomer A is selected from the group consisting of benzyl methacrylate, butyl methacrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, octyl methacrylate, lauryl ethacrylate, stearyl methacrylate, phenyl methacrylate, phenoxyethyl methacrylate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, lauryl acrylate, stearyl acrylate, benzyl acrylate, phenyl acrylate, phenoxyethyl acrylate and styrene.

3. The pigment dispersion of claim 2 , wherein said monomer B is selected from the group consisting of methacrylic acid, acrylic acid, maleic acid, maleic acid monoester, itaconic acid, itaconic acid monoester, crotonic acid, crotonic acid monoester, N,N-dimethylaminoethyl methacrylate, N,N-diethylaminoethyl methacrylate, N,N-dimethylaminoethyl acrylate, N,N-diethylaminoethyl acrylate, t-butylaminoethyl methacrylate, t-butylaminoethyl acrylate, vinyl pyridine, and 2-acrylamido-2-propane sulfonic acid.

4. The pigment dispersion of claim 3 , wherein W is 0.

5. The pigment dispersion of claim 4 , wherein R 2 and R 3 are H.

6. The pigment dispersion of claim 4 , wherein R 2 and R 3 are C 1 -C 5 alkyl.

7. The pigment dispersion of claim 4 , wherein R 1 is CH 2 .

8. The pigment dispersion of claim 7 , wherein R 2 and R 3 are H.

9. The pigment dispersion of claim 7 , wherein R 2 and R 3 are C 1 -C 5 alkyl.

10. The pigment dispersion of claim 3 , wherein W is NH.

11. The pigment dispersion of claim 10 , wherein R 1 is CH 2 .

12. The pigment dispersion of claim 11 , wherein R 2 and R 3 are H.

13. The pigment dispersion of claim 11 , wherein R 2 and R 3 are C 1 -C 5 alkyl.

14. The pigment dispersion of claim 10 , wherein R 1 is C 2 H 4 .

15. The pigment dispersion of claim 14 , wherein R 2 and R 3 are H.

16. The pigment dispersion of claim 14 , wherein R 2 and R 3 are C 1 -C 5 alkyl.

Assignees

• Du Pont
• Du Pont

Inventors

• Roberts C Chad
• Jackson Christian

Classifications

• C08F22/00

  Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides or nitriles thereof · CPC title

• C09D11/107 Primary

  from unsaturated acids or derivatives thereof · CPC title

• C09D11/106

  containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C08F220/36

  containing oxygen in addition to the carboxy oxygen {, e.g. 2-N-morpholinoethyl (meth)acrylate or 2-isocyanatoethyl (meth)acrylate} · CPC title

• C09D11/033

  characterised by the solvent · CPC title