Dispersions containing polyether dispersants

• US 20030172844A1
• Filed: 02/13/2003
• Published: 09/18/2003
• Est. Priority Date: 08/18/2000
• Status: Active Grant

• Current Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Inventors: Thetford, Dean
• Granted Patent: US 6,884,286 B2
• Time in Patent Office: Days
• US Class Current: 106/31.58
• CPC Class Codes: C09D 11/03 characterised by features other than the chemical nature of the binder
• CPC Class Codes: C09D 17/002 in organic medium C09D17/003, C09D17/004 take precedence
• CPC Class Codes: C09D 7/45 Anti-settling agents

Abstract

A dispersion comprising a particulate solid, a polar organic liquid and a dispersant of formula (1) wherein R is optionally substituted C_4-50-hydrocarbyl; X is —O—, —S— or —NR²—; R¹ is hydrogen or C_1-6, -alkyl which may be linear or branched; R² is hydrogen or C_1-6, alkyl which may be linear or branched or a group —(C₂H₄O)_n(AO)_p—R¹; AO is alkyleneoxy containing 3 or more carbon atoms; n is 0 to 30; p is 4 to 100; and p>n; and a is from 1 to 3. Preferred compounds are where R¹ is hydrogen, X is —O— and a is 1 and R is the residue of 2-naphthol.

Claims

1. A dispersion comprising a particulate solid, a polar organic liquid optionally containing up to 10% by weight water and a dispersant of formula 1

R

X—

(C₂H₄O)_n(AO)_p—

R¹]_a 

 

Formula 1

wherein

R is optionally substituted C_4-50-hydrocarbyl;

X is —

O—

or —

S—

;

R¹ is hydrogen or C_1-6-alkyl which may be linear or branched;

AO is alkyleneoxy containing 3 or more carbon atoms;

R¹ is hydrogen or C_1-6-alkyl which may be linear or branched;

n is 0 to 30;

p is 4 to 100;

p>

n; and

a is 1.

2. A dispersion as claimed in claim 1 wherein X is —

O—

.

3. A dispersion as claimed in either claim 1 or claim 2 wherein R¹ is hydrogen.

4. A dispersion as claimed in any one of claims 1 to 3 wherein R is 2-naphthyl.

5. A dispersion is claimed in any one of claims 1 to 4 wherein AO is 2-methylethoxy.

6. A dispersion as claimed in any one of claims 1 to 5 wherein n is zero.

7. A dispersion as claimed in any one of claims 1 to 6 wherein p is not greater than 80.

8. A millbase comprising a particulate solid, a polar organic liquid optionally containing up to 10% by weight water, a film-forming binder resin and a dispersant of formula 1.

R

X—

(C₂H₄O)_n(AO)_p—

R¹]_a 

 

Formula 1

wherein

R is optionally substituted C_4-50-hydrocarbyl;

X is —

O—

or —

S—

;

R¹ is hydrogen or C_1-6,-alkyl which may be linear or branched;

AO is alkyleneoxy containing 3 or more carbon atoms;

n is 0 to 30;

p is 4 to 100;

p>

n; and

a is 1.

9. A paint or ink comprising a particulate solid, a polar organic liquid optionally containing up to 10% be weight water, a film-forming binder resin and a dispersant of formula 1.

R

X—

(C₂H₄O)_n(AO)_p—

R¹]_a 

 

Formula 1

wherein

R is optionally substituted C_4-50-hydrocarbyl;

X is —

O—

or —

S—

;

R¹ is hydrogen or C_1-6,-alkyl which may be linear or branched;

AO is alkyleneoxy containing 3 or more carbon atoms;

n is 0 to 30;

p is 4 to 100;

p>

n; and

a is 1.

10. A composition comprising a particulate solid selected from pigments, extenders, fillers, solids for oil-based and invert-emulsion drilling muds, dirt and solid particles in dry cleaning fluids, ceramic materials, magnetic materials, biocides, agrochemicals and pharmaceuticals and a dispersant of formula 1.

R

X—

(C₂H₄O)_n(AO)_p—

R^1]_a 

 

Formula 1

wherein

R is optionally substituted C_4-50-hydrocarbyl,

X is —

O—

or —

S—

;

R¹ is hydrogen or C_1-6,-alkyl which may be linear or branched;

AO is alkyleneoxy containing 3 or more carbon atoms;

n is 0 to 30;

p is 4 to 100;

p>

n; and

a is 1.