Resin Color Developer |
Resin Color Developer RD9870A RD9870A is a resin color developer which belongs to zinc salicylate type. It is used for carbonless copy paper (CF or CFB). It enjoys the following advantages: rapid color development at low temperature,high coating whiteness,good color intensity and slow light-resistant aging.RD9870A is an ideal resin color developer of a new generation. Feaure: 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 coaring. 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 RD9870A is used to prepare CF paste, first add water,dispersant and solid material 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 to 9.5). Finally add resin and SBR latex and stir for another 15-20 minutes. The final PH value of CF paste is around 7.0-8.0. 2.Sodium polyacry late (∑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: Solid content(%)≥45 Viscosity (at 25℃,mpa.s)200-600 Mean particle diameter(um)≤1.5 PH value4.0-6.0 Zinc content(%)≥4.5 Suggestion: The emulsion will be easily damaged when temperature is higher than 60℃. Storage requirement: √Violent collision or edge tool cut should be avoided in order to prevent leakage; √Storage temperature:not lower than 5℃. |
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