US 12,129,387 B2
Stable inkjet dispersions and inks
Paul Wallace, Letchworth Garden City (GB); Ian Whitehead, Morges (CH); and Yves Gentil, Morges (CH)
Assigned to SUN CHEMICAL CORPORATION, Parsippany, NJ (US)
Appl. No. 18/020,698
Filed by SUN CHEMICAL CORPORATION, Parsippany, NJ (US)
PCT Filed Jul. 13, 2022, PCT No. PCT/GB2022/051816
§ 371(c)(1), (2) Date Feb. 10, 2023,
PCT Pub. No. WO2023/285818, PCT Pub. Date Jan. 19, 2023.
Claims priority of provisional application 63/221,058, filed on Jul. 13, 2021.
Prior Publication US 2023/0312951 A1, Oct. 5, 2023
Int. Cl. C09D 11/102 (2014.01); B41J 2/01 (2006.01); B41J 2/21 (2006.01); B41J 3/407 (2006.01); B41M 5/00 (2006.01); C09D 11/10 (2014.01); C09D 11/32 (2014.01); C09D 11/322 (2014.01); C09D 11/38 (2014.01); C09D 153/00 (2006.01)
CPC C09D 11/102 (2013.01) [B41J 2/01 (2013.01); B41J 2/2107 (2013.01); B41J 3/4078 (2013.01); B41M 5/0023 (2013.01); C09D 11/10 (2013.01); C09D 11/32 (2013.01); C09D 11/322 (2013.01); C09D 11/38 (2013.01); C09D 153/00 (2013.01)] 17 Claims
 
1. A printing ink or pigment dispersion composition comprising a water-insoluble azo-functional colorant; at least two different functionality non-ionic dispersants; and an alkylnaphthalene sulfonate anionic surfactant with the alkyl being hydrogen, methyl or ethyl;
wherein at least one of the at least two different functionality non-ionic dispersants is a first non-ionic polymer comprising water-solubilizing polar groups selected from the group consisting of carboxylic acid or carboxylic acid salts, sulfonic acid, sulfonic acid salts and combinations thereof;
wherein at least one of the at least two different functionality non-ionic dispersants is a second non-ionic polymer comprising glycol repeating units and amine-rich repeating units;
wherein the second non-ionic polymer is a block co-polymer comprising at least a first block and a second block;
wherein the first block is a polyether based on ethylene glycol or propylene glycol repeating units and the second block is a poly(meth)acrylate comprising substituent amine groups;
wherein the alkylnaphthalene sulfonate anionic surfactant has the following structure:

OG Complex Work Unit Chemistry
wherein n is 0, 1, or 2; m is 0 or 1 with the proviso that at least one m is 1; p is between 0 and 10; and X is any suitable cation.