Pigment dispersion for use in hydrophilic and hydrophobic media

• US 4,156,616 A
• Filed: 08/25/1977
• Issued: 05/29/1979
• Est. Priority Date: 08/28/1976
• Status: Expired due to Term

• Current Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Original Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Inventors: Dietz, Erwin, Maikowski, Michael, Gutbrod, Robert
• Primary Examiner(s): Douglas, Winston A.
• Assistant Examiner(s): Howard, J. V.
• Application Number:
  US05/827,800
• Time in Patent Office: 642 Days
• Field of Search: 106/308 N, 106/308 Q
• US Class Current: 106/503
• CPC Class Codes: C09B 67/006 Preparation of organic pigments
• CPC Class Codes: C09D 17/00 Pigment pastes, e.g. for mixing in paints artists' paints C09D5/06

Abstract

Dispersions of inorganic and organic pigments containing an alkylene oxide adduct on long-chain aliphatic amines and an anionic surfactant having an aliphatic radical of 3 to 40 carbon atoms can easily be distributed in hydrophilic and hydrophobic media and yield colorations of high tinctorial strength and purity of shade.

Claims

1. A pigment dispersion consisting essentially of

a. a pigment,

b. an alkylene oxide addition product of a long chain amine, said long chain being an alkyl or alkenyl chain of 6 to 30 carbon atoms and said addition product containing 1 to 30 ethylene oxide units, and

c. an anionic surfactant having at least one aliphatic radical with 3 to 40 carbon atoms.

2. A pigment dispersion as claimed in claim 1, containing additionally a preservation agent.

3. A pigment dispersion as claimed in claim 1, containing additionally an agent preventing the dispersion from drying up and optionally water.

4. A dispersion as claimed in claim 1, wherein said alkylene oxide addition product is an adduct of an alkylene oxide on a primary aliphatic amine.

5. A dispersion as claimed in claim 1, wherein said alkylene oxide addition product is an ethylene oxide addition product of oleyl amine, stearylamine, tallow fatty amine or coconut fatty amine.

6. A dispersion as claimed in claim 1, wherein said surfactant has the formula ##STR2## in which R is an aliphatic radical having 3 to 40 carbon atoms,

A is benzene or naphthalene which are unsubstituted or substituted by 1 or 2 aliphatic radicals having 1 to 20 carbon atoms,

B is a bivalent group selected from --O--, --CO--, --SO₂ --, --NR'"'"'-- wherein R'"'"' is hydrogen or alkyl of 1 to 4 carbon atoms, or a combination of such bivalent groups,

C is alkylene of 1 to 6 carbon atoms or a polyalkylene oxide chain of 1 to 30 monomer units,

D is an anionic group and

n¹, n² and n³ are zero or 1.

7. A dispersion as claimed in claim 6, wherein R has 6 to 22 carbon atoms.

8. A dispersion as claimed in claim 6, wherein R is alkyl or alkenyl which are unsubstituted or substituted by 3 equal or different substituents selected from hydroxy and carboxy.

9. A dispersion as claimed in claim 6, wherein A is benzene which is unsubstituted or substituted by 1 or 2 substituents selected from alkyl and alkenyl.

10. A dispersion as claimed in claim 6, wherein B is --O--, --CO--, --SO₂ --, --NR'"'"'--, --CO--O--, --O--CO--, --CO--NR'"'"'--, --NR'"'"'--CO--, --SO₂ --NR'"'"'--, or --NR'"'"'--SO₂ --.

11. A dispersion as claimed in claim 6, wherein C is alkylene of 1 to 6 carbon atoms, or a polyalkylene oxide chain consisting of 1 to 30 ethylene oxide or propylene oxide units or both.

12. A dispersion as claimed in claim 6, wherein D is --COO^-, --SO₃^- or --O--SO₃^-.

13. A dispersion as claimed in claim 1 wherein, in addition to the amine addition product and anionic surfactant, a non-ionic surfactant is used which is an alkoxylated alkylphenol or an alkoxylated fatty alcohol.

14. A process for pigmenting hydrophilic and hydrophobic media which comprises incorporating in these media a pigment dispersion as claimed in claim 1.

15. A pigment disperstion consisting essentially of

a. from 3% to 70% by weight of a pigment,

b. from 1% to 50% by weight of an alkylene oxide addition product of a long chain amine, said long chain being an alkyl or alkenyl chain of 6 to 30 carbon atoms and said addition product containing 1 to 30 ethylene oxide units, and

c. from 1% to 50% by weight of an anionic surfactant having at least one aliphatic radical with 3 to 40 carbon atoms.

16. A pigment dispersion containing

a. from 3% to 70% by weight of a pigment,

b. from 1% to 50% by weight of an alkylene oxide addition product of a long chain amine, said long chain being an alkyl or akenyl chain of 6 to 30 carbon atoms and said addition product containing 1 to 30 ethylene oxide units, and

c. from 1% to 50% by weight of an anionic surfactant having at least one aliphatic radical with 3 to 40 carbon atoms, and

d. a liquid medium selected from alkylene glycols and formamide.