| 摘要 |
<p>Process for the production of a compound of formula in pigmentary form having a mean particle size not exceeding 2.0 microns, comprisinga) first reacting together 2-hydroxy-1-napthaldehyde and 2-aminophenol under aqueous alkaline non-oxidising conditions, and either neutralising the reaction product or isolating the reaction product and re-dispersing it in aqueous medium and adding to the neutralized or redispersed reaction production whilst applying mechanical stirring to the mixture, an aqueous solution of a coppering agent,b) separating the solid product, washing it free from inorganic salts and optionally drying it, andc) subjecting the dried pigmentary product to a kneading, salt-milling or aqueous milling procedure. The pigment produced is suitable for use in the pigmentation of higher molecular weight hydrophobic organic or other organic materials.</p> |
