Aqueous dispersions of coloring materials: poly-alkyleneoxy naphthalene dispersing agents

• US 4,373,930 A
• Filed: 09/15/1981
• Issued: 02/15/1983
• Est. Priority Date: 10/03/1979
• Status: Expired due to Fees

• Current Assignee: Imperial Chemical Industries Limited (Nouryon BV)
• Original Assignee: Imperial Chemical Industries Limited (Nouryon BV)
• Inventors: Rothwell, Geoffrey R.
• Primary Examiner(s): Clingman, A. Lionel
• Application Number:
  US06/302,397
• Time in Patent Office: 518 Days
• Field of Search: 8/527, 8/528, 8/583, 8/587, 8/604, 8/610, 8/613, 8/589, 106/308 Q, 252/182, 252/301.21
• US Class Current: 8/527
• CPC Class Codes: C09B 67/006 Preparation of organic pigments
• CPC Class Codes: C09B 67/008 Preparations of disperse dyes or solvent dyes
• CPC Class Codes: C09B 67/0089 non ionic dispersing agent, e.g. EO or PO addition products
• CPC Class Codes: D06P 1/6135 from aromatic alcohols or from phenols, naphthols

Abstract

An aqueous dispersion of a solid, especially a disperse dyestuff or a pigment, containing, as dispersing agent, a water-soluble, non-ionic polycyclic aromatic compound having a poly(lower alkylene-oxy)chain containing from 5 to 30 lower alkylene-oxy groups. Preferred dispersing agents contain about 10 ethylene-oxy groups in the chain. The dispersions of disperse dyestuffs are especially suitable for use in aqueous print pastes based on synthetic thickening agents and the pigment dispersions are suitable for use in emulsion paints.

Claims

1. An aqueous dispersion of a finely-divided, inorganic or non-ionic, organic solid selected from the groups consisting of disperse dyestuffs, pigments, optical brightening agents and anthraquinone, containing a water-soluble, non-ionic dispersing agent which comprises naphthalene carrying, in the alpha or the beta position, a water-solubilising poly(C₂ to C₄ alkyleneoxy) chain containing from 5 to 15 C₂ to C₄ alkyleneoxy groups and otherwise free from substituents.

2. An aqueous dispersion according to claim 1 wherein at least 50% of the C₂ to C₄ alkyleneoxy groups are ethyleneoxy groups.

3. An aqueous dispersion according to claim 1 wherein the dispersing agent has the formula:

space="preserve" listing-type="equation">A--X--Y

wherein

A represents unsubstituted naphthyl;

X represents a group selected from --O--, --Co.O-- and --S--; and

Y represents --(C₃ H₆ O)_m --(C₂ H₄ O)_n wherein m is from O to n and m+n is from 5 to 15.

4. An aqueous dispersion according to claim 3 wherein X is --O--.

5. An aqueous dispersion according to claim 1 containing from 5 to 70%, by weight, of the solid and from 5 to 150%, by weight, based on the weight of the solid, of the dispersing agent.

6. An aqueous print paste comprising a dispersion according to any one of claims 1 to 4 and 5 wherein the solid is a disperse dyestuff, and a thickening agent.

7. A print paste according to claim 6 wherein the thickening agent is a synthetic thickening agent.