First, water washable ink resin formula

Raw Material Name Quantity (%)

Rosin 36

Maleic anhydride 8

Ethylene glycol 20

Diethylene glycol 16

Urine 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 rises gradually, rosin begins to melt;

After 1 hour, when the temperature rose to 180°C, the stirring was started, and the maleic anhydride was added to the reaction kettle according to the formulation amount. When the temperature was increased to 200°C, stirring was continued until the maleic anhydride was completely dissolved, and the heat preservation was started (in divided into three times).

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 test indicators of resin

Appearance: colorless or amber transparent viscous liquid.

Fineness: ≤10μm China Ink Technology Network Copyright

Solid content: 48~52%

PH value: 7.5 to 9

Viscosity: 4000～5000cp/25°C

Water solubility: 1:20 water solution is clear and transparent

IV. 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.