Dispersions containing polyether dispersants
AssigneeThe Lubrizol Corporation
InventorDean Thetford
Life of this patent
Estimating the term…
Abstract
A dispersion comprising a particulate solid, a polar organic liquid and a dispersant of formula (1) wherein R is optionally substituted C4-50-hydrocarbyl; X is —O—, —S— or —NR2—; R1 is hydrogen or C1-6, -alkyl which may be linear or branched; R2 is hydrogen or C1-6, 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.
Claims9
A dispersion comprising a particulate solid, a polar organic liquid optionally containing up to 10% by weight water and a dispersant of formula 1
- RX—(C2H4O)n(AO)p—R1]a Formula 1
- wherein
- R is optionally substituted C4-50-hydrocarbyl;
- X is —O— or —S—;
- R1 is hydrogen or C1-6-alkyl which may be linear or branched;
- AO is alkyleneoxy containing 3 or more carbon atoms;
- n is zero;
- p is 4 to 100;
- and
- p>n;
- and
- a is 1.
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
- RX—(C2H4O)n(AO)p—R1]a Formula 1
- wherein
- R is optionally substituted C4-50-hydrocarbyl;
- X is —O— or —S—;
- R1 is hydrogen or C1-6-alkyl which may be linear or branched;
- AO is alkyleneoxy containing 3 or more carbon atoms;
- n is zero;
- p is 4 to 100;
- and
- p>n;
- and
- a is 1.
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.
- RX—(C2H4O)n(AO)p—R1]a Formula 1
- wherein
- R is optionally substituted C4-50-hydrocarbyl;
- X is —O— or —S—;
- R1 is hydrogen or C1-6-alkyl which may be linear or branched;
- AO is alkyleneoxy containing 3 or more carbon atoms;
- n is zero;
- p is 4 to 100;
- and
- p>n;
- and
- a is 1.
A composition comprising a particulate solid selected from the group consisting of 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.
- RX—(C2H4O)n(AO)p—R1]a Formula 1
- wherein
- R is optionally substituted C4-50-hydrocarbyl;
- X is —O— or —S—;
- R1 is hydrogen or C1-6-alkyl which may be linear or branched;
- AO is alkyleneoxy containing 3 or more carbon atoms;
- n is zero;
- p is 4 to 100;
- and
- p>n;
- and
- a is 1.
Dependencies are inferred from the claim text.