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Phosphoric acid monoesters useful for surface treatment of pigments for waterborne coatings

  • US 5,466,482 A
  • Filed: 12/15/1994
  • Issued: 11/14/1995
  • Est. Priority Date: 12/15/1994
  • Status: Expired due to Term
First Claim
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1. A process for surface treating organic pigments comprising applying to the surface of an organic pigment(a) 0.5 to 15 percent by weight, relative to the pigment, of a phosphoric acid monoester having the formula ##STR4## wherein R is(i) a saturated C5 -C40 aliphatic group or a saturated C5 -C40 aliphatic group in which one or more aliphatic carbon atoms is substituted with halogen, C1 -C6 alkyl, C1 -C6 alkoxy, a C6 -C10 aromatic hydrocarbon group or a C6 -C10 aromatic hydrocarbon group substituted with a C1 -C12 alkyl group, or --COORa (wherein Ra is hydrogen, metal, ammonium, C1 -C6 alkyl, or C6 -C10 aryl), optionally wherein one or more non-adjacent aliphatic backbone carbon atoms are replaced with O, S, or NRb (wherein Rb is C1 -C6 alkyl or C6 -C10 aryl), or(ii) an unsaturated C5 -C40 aliphatic group or an unsaturated C5 -C40 aliphatic group in which one or more aliphatic carbon atoms is substituted with halogen, C1 -C6 alkyl, C1 -C6 alkoxy, a C6 -C10 aromatic hydrocarbon group or a C6 -C10 aromatic hydrocarbon group substituted with one or more C1 -C6 alkyl groups, or --COORa (wherein Ra is hydrogen, metal, ammonium, C1 -C6 alkyl, or C6 -C10 aryl), optionally wherein one or more non-adjacent aliphatic backbone carbon atoms are replaced with O, S, or NRb (wherein Rb is C1 -C6 alkyl or C6 -C10 aryl), andM is hydrogen, metal, or ammonium;

  • in admixture with(b) 0 to 10 percent by weight, relative to the phosphoric acid monoester, of a process additive.

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