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PY191

Honor pigments, Organic Pigments Supplier, High Performance Pigments is a leading China PY191 manufacturer, supplier and exporter. Adhering to the pursuit of perfect quality of products, so that our PY191 have been satisfied by many customers. Extreme design, quality raw materials, high performance and competitive price are what every customer wants, and that's also what we can offer you. Of course, also essential is our perfect after-sales service. If you are interested in our PY191 services, you can consult us now, we will reply to you in time!
  • HP YELLOW 13130 / PIGMENT YELLOW 191
    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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