Water washable ink resin formulation, process
I. Water washable ink Resin formulation Raw material name Quantity (%) Rosin 36 Maleic anhydride 8 Ethylene glycol 20 Diethylene glycol 16 Urea 8 Triethanolamine 12
Second, the resin liquid production process
1. According to the amount of rosin, the rosin is weighed into the reaction kettle and warmed up.
2. When the temperature in the reactor gradually rises, the rosin begins to melt; when the temperature rises to 180°C after 1 hour, the stirring is started, and the maleic anhydride is added to the reaction kettle according to the formulation amount, and the mixture is stirred until the maleic anhydride is completely heated to 200°C. Insulation began after melting (in three divided inputs).
3. Incubate the acid in the kettle for about 3 hours. When the acid value is 240 to 250, put ethylene glycol and diethylene glycol into the kettle. Stir until the temperature drops to 170°C and then keep warm for 2 hours.
4. About 1 hour later, when the temperature dropped to 100°C, urea was added and the temperature was lowered after the temperature was maintained for 1 hour.
5. When the temperature in the kettle falls to 70°C, add triethanolamine slowly to the reactor to adjust the pH, and control the temperature to hold at pH=7.5~9.
6. After incubating for 1 hour, when it is cooled down to about 30°C, it shall be tested and discharged.
Third, the main resin test indicators Appearance: colorless or amber transparent viscous liquid. Fineness: ≤10μm China Ink Technology Network All Rights Reserved Solid Content: 48～52% PH Value: 7.5～9 Viscosity: 4000～5000cp/25°C Water-soluble: 1:20 when the aqueous solution is clear and transparent
Precautions in the production process:
1. Before starting operation, first check whether the production equipment is clean and whether it can operate normally.
2, the production workshop must be far away from the fire source, cool and ventilated.
3, we must strictly according to the formula required to call the amount of raw materials.
4, strictly in accordance with the order of feeding operation.
5. After entering various kinds of raw materials, small batches of test production should be done first to ensure the quality of industrial products.
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