High-solid content calcium stearate lubricant for paper coating and preparation method thereof
A calcium stearate lubricant, high solid content technology, used in papermaking, textiles and papermaking, fiber raw material processing and other directions, can solve the problem that the solid content cannot meet the use requirements of high-speed paper machines, the structure design is not reasonable, and the lubrication effect is not good. and other problems, to achieve the effect of low cost, reasonable design and good lubrication effect
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[0024] The preparation method of the high solid content calcium stearate lubricant for papermaking coating comprises the following steps:
[0025] A. Calcium hydroxide is added to deionized water to prepare the first suspension. In the first suspension, the weight of calcium hydroxide accounts for 30-40% of the weight of the first suspension; adding 0.5-2% of the weight of the first suspension % emulsifier, warming up to 30-50°C, emulsifying for 30-60 minutes, and preparing a calcium hydroxide suspension for subsequent use;
[0026] B, add deionized water in stearic acid, be mixed with the second suspension, stearic acid weight accounts for 50-60% of the first suspension weight in this second suspension; Add and account for the second suspension weight 0.8-60% 2% compounded emulsifier, stirred, heated up to 80-85°C, and prepared stearic acid emulsion for subsequent use;
[0027] C. Quickly add the prepared calcium hydroxide suspension to the stearic acid emulsion. The amount ...
specific Embodiment 1
[0033] Add 53.3g of calcium hydroxide to 78g of water, add 1.3g of MOA-7 emulsifier, stir and heat up to 35°C, emulsify with high-shear emulsifier for 30 minutes, and set aside. 170.4g of water was added into a 1000ml four-necked flask equipped with a stirrer and a thermometer. Stir, add 170.4g of stearic acid, 1.12g of MOA-7, 1.6g of nonylphenol polyoxyethylene ether (10) sodium sulfate, raise the temperature to 83°C, and add the emulsified calcium hydroxide emulsion dropwise to the hard disk in about 12 minutes. In the fatty acid emulsion, the temperature of the material rises sharply during the dropping process, and the viscosity of the material increases. When the temperature of the material reaches 95-98°C, the viscosity of the material decreases after 5 minutes of reaction. When the temperature is kept above 90°C for 30 minutes, the material is a milky white uniform emulsion. Cool the material to 60°C, add 2.8g of PEG4008 and 60g of urea, stir well, cool down and dischar...
specific Embodiment 2
[0034] Add 55.5g of calcium hydroxide to 83g of water, add 2g of MOA-3 emulsifier, stir and raise the temperature to 35°C, emulsify with high-shear emulsifier for 45 minutes, and set aside. 116g of water was added into a 1000ml four-necked flask equipped with a stirrer and a thermometer. Stir, add 142g stearic acid, 1.0g MOA-3, 1.5g sodium nonylphenol polyoxyethylene ether (10) sulfonate, raise the temperature to 83°C, add the emulsified calcium hydroxide emulsion dropwise to the hard In the fatty acid emulsion, the temperature of the material rises sharply during the dropping process, and the viscosity of the material increases. When the temperature of the material reaches 95-98°C, the viscosity of the material decreases after 4 minutes of reaction. When the temperature is kept above 90°C for 30 minutes, the material is a milky white uniform emulsion. Cool the material to 60°C, add 32.3g of PEG1000 and 80g of urea, stir well, cool down and discharge. Its solid content is 62%...
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