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Emulsion paraffin for producing waterproof fiberboard and preparation method thereof

A technology for emulsifying paraffin and fiberboard, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of inflammability and explosion, increase production cost, pollute the environment, etc., and achieve the effect of good stability and good waterproof performance.

Active Publication Date: 2013-06-12
GUANGXI RES INST OF CHEM IND CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic solvent used in this patent is flammable and explosive when volatilized at high temperature. On the one hand, there are great safety hazards in the production process. On the other hand, it pollutes the environment and is not conducive to the physical and mental health of production workers. The third is to increase the production cost.

Method used

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  • Emulsion paraffin for producing waterproof fiberboard and preparation method thereof
  • Emulsion paraffin for producing waterproof fiberboard and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 30kg of solid paraffin, 1kg of emulsifier octylphenol polyoxyethylene (6) ether, 0.1kg of sodium perfluorooctanoate and 48.9kg of water into the emulsification tank, heat up to 90-95°C to melt the solid paraffin, and then add 20kg of pre-prepared 5% polyvinyl formal aqueous solution, the mixed system is spontaneously emulsified to form a milky white emulsion, and the emulsion is cooled to room temperature to obtain 100kg paraffin microemulsion. The average particle size of the product is 280±10nm, the stability is good, and there is no layering phenomenon after one year of storage. Compared with the molten paraffin test, under the same test conditions, the amount of paraffin microemulsion is 5kg / m 3 At this time, the water absorption thickness expansion rate of the fiberboard is reduced by 10.3%, and the static bending strength is increased by 1.6%.

Embodiment 2

[0022] Add 40kg of solid paraffin, 5kg of emulsifier octylphenol polyoxyethylene (7) ether, 2kg of sodium perfluorooctane sulfonate and 43kg of water into the emulsification tank, heat up to 90-95°C to melt the solid paraffin, and then add 10kg of The pre-prepared 7% polyvinyl formal aqueous solution is used to spontaneously emulsify the mixed system to form a milky white emulsion, and the emulsion is cooled to room temperature to obtain 100 kg of paraffin microemulsion. The average particle size of the product is 280±10nm, the stability is good, and there is no layering phenomenon after one year of storage. Compared with the molten paraffin test, under the same test conditions, the amount of paraffin microemulsion is 5kg / m 3 At this time, the water absorption thickness expansion rate of the fiberboard is reduced by 10.1%, and the static bending strength is increased by 1.5%.

Embodiment 3

[0024] Add 30kg of solid paraffin, 2kg of emulsifier nonylphenol polyoxyethylene (6) ether, 0.1kg of sodium perfluorooctane sulfonate and 62.9kg of water into the emulsification tank, heat up to 90-95°C to melt the solid paraffin, and then Add 5 kg of pre-prepared 10% polyvinyl formal aqueous solution to make the mixed system spontaneously emulsify to form a milky white emulsion, and cool the emulsion to room temperature to obtain 100 kg of paraffin microemulsion. The average particle size of the product is 280±10nm, the stability is good, and there is no layering phenomenon after one year of storage. Compared with the molten paraffin test, under the same test conditions, the amount of paraffin microemulsion is 5kg / m 3 At this time, the water absorption thickness expansion rate of the fiberboard is reduced by 10.3%, and the static bending strength is increased by 1.6%.

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Abstract

The invention relates to emulsion paraffin for producing a waterproof fiberboard. The emulsion paraffin comprises solid paraffin, an emulsifier, a colloid stabilizer, a waterproof agent and water. The emulsion paraffin is obtained by self-emulsification in one step based on weakly hydrophilic polyether and / or phenolic ether as the emulsifier and polyvinyl formal as the colloid stabilizer. The preparation method comprises the following steps of: adding solid paraffin, the emulsifier, the waterproof agent and water; heating to 90-95 DEG C to completely dissolve solid paraffin; then, adding the colloid stabilizer polyvinyl formal aqueous solution to self-emulsify the mixed system to form a milk white emulsion; and cooling the emulsion to room temperature to obtain the target product. The reaction process is free from stirring, the mixed liquid is self-emulsified, and the average grain diameter of product particle is not greater than 300nm.

Description

technical field [0001] The invention relates to an emulsified paraffin and a preparation method thereof, in particular to an emulsified paraffin which can be used in the production of waterproof fiberboards and a preparation method thereof. Background technique [0002] The traditional waterproof process of fiberboard production is to spray molten solid paraffin directly into the fiber particles. Due to the uneven size of the sprayed particles, the consumption of paraffin is large and the product quality is affected. Emulsified paraffin is a dispersion system in which solid paraffin becomes a paraffin emulsion through the emulsification of an emulsifier. Using emulsified paraffin instead of solid paraffin in the production of fiberboard can not only achieve the purpose of waterproofing, but also reduce the amount of paraffin. Therefore, in the production of fiberboard and wood It is more and more widely used in the processing industry. [0003] At present, the emulsifiers u...

Claims

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Application Information

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IPC IPC(8): C08L91/06C08J3/03C09K3/18
Inventor 阮恒龚福忠曹欣欣周彬蒋其辉
Owner GUANGXI RES INST OF CHEM IND CO LTD
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