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PY191

With years of experience in production PY191, honor pigments, organic pigments supplier, quality products from china can supply a wide range of PY191. PY191 can meet many applications, if you need, please get our online timely service about PY191. In addition to the product list below, you can also customize your own unique PY191 according to your specific needs.
  • HP YELLOW 13130 / PIGMENT YELLOW 191
    Pigment Yellow 191 P.Y.191 displays excellent solvent fastness in aliphatic and in aromatic hydrocarbons, as well as in the commonly used plasticizers. The pigment is almost completely fast to alcohols and esters but not to water, ketones and methylglycol. P.Y.191 is also used for hot melting traffic paints in the USA. Four new crystal modifications of P.Y.191 have been described supplementing  the known alpha-phase. Phase conversions were achieved by solvation of the alpha-phase in high boiling organic solvents with subsequent cooling: the-phase by recrystallizing from NMP (180°C), DMAA or DMSO; the alpha-phase from diethyleneglycol dimethylether (150–170°C), the alpha-phase from ethyleneglycol (170–200°C) and the alpha-product from DMF.

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