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Water-proof and mildew-proof agent for artificial board and preparation method thereof

The invention relates to a mold inhibitor and a technology for wood-based panels, which are applied in the field of additives for wood-based panels and their preparation, which can solve the problems of long melting time, large amount of paraffin, and fast instantaneous water absorption, and improve the waterproof and mildew-proof performance and comprehensive waterproof performance. Good, anti-mildew performance remarkable effect

Active Publication Date: 2015-05-20
ZHAOQING LIHE TECH DEV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fiberboard using molten paraffin as waterproofing agent has a slow instantaneous water absorption speed on the surface of the board and a good instantaneous waterproof effect. However, the paraffin needs to be heated and melted during use, which takes a long time to melt, high energy consumption, and a large amount of paraffin. It is inconvenient to use and relatively expensive. high
[0007] In order to solve the problems of fast instantaneous water absorption of fiberboard, large thickness expansion rate after 2 hours of water immersion, and easy mold, the applicant has carried out various and multi-angle prior research. For example, the patent No. ZL00251197.5 utility model patent discloses wooden artificial Waterproof, moisture-proof, and mildew-proof microcapsule products for boards only disclose the structure of spherical or round rod-shaped waterproof and mildew-proof microcapsules, and do not specifically disclose the composition, formula and waterproof and mildew-proof agent of the waterproof and mildew-proof capsules The preparation process method
Moreover, the microcapsule product of this kind of structure is easy to agglomerate, stick together, and has poor dispersibility because of its small particles, and it is easy to precipitate and unevenly disperse during the preparation of wood-based panels
The microcapsules of this structure have a remarkable application effect in wood particleboard, but it is difficult to apply in wood medium / high density fiberboard

Method used

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  • Water-proof and mildew-proof agent for artificial board and preparation method thereof
  • Water-proof and mildew-proof agent for artificial board and preparation method thereof
  • Water-proof and mildew-proof agent for artificial board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] 1. Prepare raw materials according to the following weight (×100g)

[0087]

[0088] 2. The capsule core raw material paraffin, stearic acid and polydimethylsiloxane are mixed, heated to 70-80° C., melted, and mixed uniformly to obtain a molten capsule core pretreatment material.

[0089]3. Add gelatin, which is one of the raw materials of the capsule shell, and dodecyl-α-D-glucoside, which acts as a surfactant, into deionized water at 70°C, stir and dissolve evenly, and make a gelatin-surfactant solution for later use , wherein the weight ratio of gelatin to deionized water is 2:50, and the weight ratio of dodecyl-α-D-glucoside to deionized water is 0.5:50.

[0090] 4. Add chitosan, one of the capsule shell raw materials, into the acetic acid solution, stir, dissolve, and mix well to make a chitosan-acetic acid solution, wherein the mass percentage concentration of the acetic acid solution is 3%, and the chitosan and The weight ratio of the acetic acid solution is ...

Embodiment 2

[0096] 1. Prepare raw materials according to the following weight (×100g)

[0097]

[0098] Except that the temperature of deionized water in step 3 is 80°C, the weight ratio of gelatin to deionized water is 0.6:50; the weight ratio of chitosan to acetic acid solution in step 4 is 2.5:50; The rotation speed is 10000rpm, the emulsification temperature is 75°C, the absolute pressure is 86KPa, and the emulsification time is 20min; the stirring speed described in step 6 is 10000rpm, the temperature is 75°C, the absolute pressure is 86KPa, the stirring time is 10min, and the temperature after cooling is 5 ℃, the cooling and cooling rate is 23.3 ℃ / min; the mass percent concentration of sodium hydroxide solution described in step 7 is 9% except that all the other are the same as in Example 1, and the prepared waterproof and mildew-proof capsule nanocapsule dispersion liquid adopts The particle size of the prepared waterproof and mildew-proof capsules was measured by a laser partic...

Embodiment 3

[0100] 1. Prepare raw materials according to the following weight (×100g)

[0101]

[0102] Except that the weight ratio of gelatin to deionized water in step 3 is 2.5:50, the weight ratio of dodecyl-α-D-glucoside to deionized water is 2:50; the mass percentage of acetic acid solution in step 4 The concentration is 4%; the rotating speed described in step 5 is 20000rpm, the emulsification temperature is 80°C, and the absolute pressure is 70KPa; in the step 6, the stirring rate is 20000rpm, the temperature is 80°C, the absolute pressure is 70KPa, and the temperature after cooling is 10°C. The cooling and cooling time is 2min, and the cooling and cooling rate is 35°C / min; except that the mass percent concentration of the sodium hydroxide solution described in step 7 is 11%, the rest are the same as in Example 1, and the prepared waterproof and mildew-proof capsule nano The particle size of the waterproof and anti-mildew capsules obtained by measuring the capsule dispersion wi...

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Abstract

The invention discloses a water-proof and mildew-proof agent for an artificial board and a preparation method thereof. The water-proof and mildew-proof agent comprises a capsule core and a capsule shell, wherein the capsule core is composed of paraffin, stearic acid and dodecyl-alpha-D-glucoside; and the capsule shell is composed of high molecular compound gelatin and chitosan. The preparation method comprises the following steps: melting the substances having water-proof property; under the action of the surfactant dodecyl-alpha-D-glucoside, dispersing in a hot gelatin and chitosan water solution in a nano particle state; and regulating the pH value, and quickly cooling to ensure that the gelatin and the chitosan are condensed into thin films coated on the nano particles of the substances having water-proof and mildew-proof property, thus forming nano capsules. The water-proof and mildew-proof agent prepared by the invention can reduce the instantaneous water absorption rate of the artificial board, improve the water-proof and mildew-proof property of the artificial board, enhance the internal bonding strength of the board, improve the product quality and save the cost by more than 20%.

Description

technical field [0001] The invention relates to an additive for wood-based panels and a preparation method thereof, in particular to a waterproof and mildew-proof additive for wood-based panels and a preparation method thereof. Background technique [0002] Wood fiber board is a kind of board made of wood fiber as raw material and applied with urea-formaldehyde resin or other synthetic resins under heat and pressure. Other suitable additives can be added to improve the properties of the board. Density at 0.65g / cm 3 -0.8g / cm 3 The wood fiberboard between is called medium density fiberboard, with a density of 0.8g / cm 3 The above wood fiberboard is called high-density fiberboard, and the thickness of wood fiberboard is more than 1.5mm. Generally, medium-density fiberboard is mainly used to make furniture and door panel substrates, etc., and high-density fiberboard is mainly used as floor substrates, etc., and finally it must be processed to make floors and door panels. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L91/06C08L61/24C08L5/08C08L89/00C08K9/10C08K5/1545
Inventor 齐维君齐振宇
Owner ZHAOQING LIHE TECH DEV
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