Lubricant for papermaking coating and preparation method of lubricant

A lubricant and coating technology, used in papermaking, paper coatings, textiles and papermaking, etc., can solve the problems of large amount of paraffin emulsion emulsifier, high requirements for preparation conditions, expensive additives, etc., and achieves low cost, harsh process conditions, Improved smoothness and surface strength

Inactive Publication Date: 2013-10-16
ZHEJIANG HEXIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The paraffin wax emulsion prepared by this patent requires a large amount of emulsifier, the price of additives is expensive, the preparation conditions are high, the process is complicated, and the cost is high, so its application in papermaking coating is limited.

Method used

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  • Lubricant for papermaking coating and preparation method of lubricant
  • Lubricant for papermaking coating and preparation method of lubricant
  • Lubricant for papermaking coating and preparation method of lubricant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Put 100kg of paraffin wax and 3kg of 12-hydroxystearic acid into the white steel tower together, heat up the temperature, and when the raw materials melt, pass 10m into the tower 3 / h air, continue to heat up, when the temperature reaches 120°C, slowly add 1kg of potassium permanganate to carry out the oxidation reaction, stop the reaction after 4 hours and lower the temperature, when the temperature is 90°C, add 5kg of fatty alcohol polyoxyethylene ether ( O-10), 4kg fatty alcohol polyoxyethylene ether (O-20), 1kg sodium dodecylbenzenesulfonate and 6kg triethanolamine, after stirring for 20 minutes, add 280kg water, at 85~95℃, at 600r Stir at a speed of 1 / min for 30 minutes. After the emulsification is completed, the temperature of the system is lowered to 50°C. The cover is opened and the material is discharged to obtain a special lubricant modified paraffin wax microemulsion for papermaking coating.

[0036] The lubricant has a solid content of 30.5%, an average part...

Embodiment 2

[0038]Add 100kg of paraffin into the reaction tower, heat up the temperature, when the raw material melts, pass 20m into the tower 3 / h of air, continue to heat up, when the temperature reaches 130°C, slowly add 12kgH 2 0 2 (content 50%), carry out oxidation reaction, stop the reaction after 5 hours and lower the temperature, when the temperature is 90°C, add 12kg nonylphenol polyoxyethylene ether (TX-10), 1kg sodium dodecyl sulfate and 3kg di For ethanolamine, after stirring for 25 minutes, add 280kg of water and stir for 40 minutes at 85-95°C at a speed of 700r / min. After the emulsification is completed, the temperature of the system is lowered to 50°C, and the cover is opened and the material is discharged to obtain a paper-making coating. Special lubricant modified paraffin microemulsion.

[0039] The lubricant has a solid content of 30.3%, an average particle size of 0.137 μm, and a viscosity of 38 mPa·s. After the emulsion was centrifuged at 3000 rpm, there was no str...

Embodiment 3

[0041] Add 100kg of paraffin into the reaction kettle, heat up the temperature, and when the raw material melts, pass it into the tower for 30m 3 / h of air, continue to heat up, when the temperature reaches 140°C, slowly add 0.4kg of manganese sulfate and 0.2kg of caustic soda to carry out the oxidation reaction, stop the reaction after 6 hours and lower the temperature, when the temperature is 90°C, add 5kg of isomeric polyalcohol Oxyethylene ether (E1310), 10kg sorbitan monooleate (Span-80) and 4kg polyethylene glycol 200, after stirring for 20 minutes, add 250kg of water, at 85~95℃, at 700r / min Stir at high speed for 35 minutes. After the emulsification is completed, the temperature of the system drops to 50°C. The lid is opened and the material is discharged to obtain a special lubricant modified paraffin wax microemulsion for papermaking coating.

[0042] The lubricant has a solid content of 29.8%, an average particle size of 0.103 μm, and a viscosity of 29 mPa·s. After ...

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Abstract

The invention discloses a lubricant for papermaking coating and a preparation method of the lubricant. The lubricant comprises the following raw materials in parts by weight: 100 parts of paraffin, 0.5-2 parts of catalyst, 5-12 parts of emulsifier, 2-8 parts of coemulsifier and 250-300 parts of water. The preparation method comprises the steps that (1), the paraffin and a cocatalyst are mixed in proportion and molten, air is supplied to the molten mixed liquor and heated to 120-160 DEG C, the catalyst at the matching ratio is added and heat preservation is performed for 3-8h, and (2), the mixed liquor obtained in Step (1) is cooled, and the emulsifier, the coemulsifier and the water at the matching ratio are added, emulsified, and then cooled to form the lubricant for paper coating. The preparation method is simple to operate and is suitable for industrial scale production, and the prepared lubricant is low in viscidity, good in stability, high in cost performance, is free from methanol and an ammoniacal odor, and does not harm physical health of a production worker or a consumer.

Description

technical field [0001] The invention relates to the field of papermaking coating, in particular to a lubricant for papermaking coating and a preparation method thereof. Background technique [0002] Lubricants in papermaking coatings can reduce the friction coefficient of the coating, change the rheology of the coating, and then improve the gloss of the finished paper. Lubricants for papermaking currently on the market are mainly high-grade fatty acid salts and high-molecular oxidized polyethylene, as well as wax emulsions, all of which can improve the friction coefficient of the coating. [0003] For example, the Chinese invention patent application with application number 201010552916.X discloses an aqueous paper-making dispersion mainly composed of calcium stearate and its preparation method. Sex additives and paint lubricants. The liquid is formed by processing calcium stearate, emulsifier A, emulsifier B, auxiliary agent, dispersant, defoamer, bactericide and water. D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/14D21H19/18
Inventor 孙大伟陈冬平
Owner ZHEJIANG HEXIN TECH
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