PURPOSE: To provide the titled agent outstanding in dispersibility in organic medium, capable of improving magnetic properties of magnetic coatings, and coating film transparency, gloss, tint, etc. of coloring pigments, comprising a hydroxyphenyl stearic acid as the active component.
CONSTITUTION: The objective surface-treating agent comprising, as the active component, a hydroxyphenyl stearic acid of formula (x and y are each integer, x+y being 15). This agent is applicable to such pigments as red oxide, yellow ochre, iron black, sienua, amber, hematite and magnetite. The treatment process may be such that a compound of the formula is incorporated in an organic solvent such as toluene, acetone, or isopropanol, being mixed with a pigment to be treated followed by distilling the solvent off and than drying.
KOBASHI HITOSHI
KADOMA YOSHIHITO
