resin color developer used for carbonless paper

RD9870 is a resin color developer which belongs to zinc salicylate type. It enjoys the following advantages: rapid color development at low temperature, high coating whiteness, good color intensity and slow light-resistant aging. RD9870 is an ideal resin color developer of a new generation. Feature: 1. Rapid color development at low temperature. Especially when the temperature is below 10 , this advantage still exists. 2. Suitable for any CF compositions consisting of resin or clay-resin. 3. Relatively thinner coating. 4. The rheological property and thixotropy of CF paste are good, suitable for any coating method. 5. Good stability when stored. Application method: 1. When RD9870 is used to prepare CF paste, first add water, dispersant,porcelain clay and calcium carbonate,etc. into the tank and stir at the speed of 1000r/min for 20 to 30 minutes. Then reduce the stirring speed to 500r/min and add starch gum, stir for 15-20 minutes (Note: adjust the PH value to8.08.5). Finally add resin and SBR latex and stir for another 15-20 minutes. The final PH value of CF paste is around 7.0. 2. Sodium polyacrylate (∑ 5000) is recommended for the dispersant. 3. Fully water-soluble active dye is recommended when coating color paper. 4. Quantity of resin applied can be reduced or increased according the requirements of the user for color intensity.Technical index:indexstandardSolid content %≥ 45Viscosity 251 500Mean particle diameter(μm)μm ≤1.5PH value4.0 6.0Zinc content %≥4.5Suggestion: The emulsion will be easily damaged when temperature is higher than 60.