Dispersion of pigments
AssigneeImperial Chemical Industries PLC
InventorsAlain Bouvy, Luc Alexander Jozef Mattheus
Life of this patent
Estimating the term…
Abstract
Aqueous pigment dispersions include branched alcohol alkoxylates of formula (I) as set forth in the specification and claims. The total dispersant used may include at least 40% by weight of the branched alcohol alkoxylate. The pigment dispersion is effective for a wide variety of pigments, including, inorganic pigments, organic pigments and carbon black. The pigment dispersions are useful, for example, in paints and other surface coatings.
Claims20
An aqueous dispersion of a pigment which includes as a dispersant at least one branched primary alcohol alkoxylate of the formula (I)
- {CH3.(CH2)n}{CH3.(CH2)m}.CH.{(CH2)p.O.(AO)q.H} (I)
- where
- n+m are each independently from 1 to 13;
- and p is 1 or 2;
- such that n+m+p is from 5 to 19;
- AO is an alkylene oxide residue having from 2 to 4 carbon atoms;
- and
- q is from 5 to 40.
A aqueous dispersion of an organic pigment having a BET surface area of up to about 40 m2.g−1 which includes an alcohol alkoxylate dispersant in which at least at least 75% of the alcohol alkoxylate dispersant is at least one branched primary alcohol alkoxylate of the formula (I):
- [CH3.(CH2)n][CH3.(CH2)m].CH.[(CH2)p.O.(AO)q.H] (I)
- where
- n and m are each independently from 1 to 13;
- and p is 1 or 2;
- such that n+m+p is from 5 to 19;
- AO is an alkylene oxide residue having from 2 to 4 carbon atoms;
- and
- q is from 5 to 40.
An aqueous dispersion of an organic pigment having a BET surface area of at least 40 m2.g−1 which includes an alcohol alkoxylate dispersant in which at least at least 40% of the alcohol alkoxylate dispersant is at least one branched primary alcohol alkoxylate of the formula (I):
- [CH3.(CH2)n][CH3.(CH2)m].CH.[(CH2)p.O.(AO)q.H] (I)
- where
- n and m are each independently from 1 to 13;
- and p is 1 or 2;
- such that n+m+p is from 5 to 19;
- AO is an alkylene oxide residue having from 2 to 4 carbon atoms;
- and
- q is from 15 to 30.
Dependencies are inferred from the claim text.