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Method for preparing waterproofing agent of saponin-free cation paraffin emulsion artificial board

A technology of paraffin emulsion and cation, applied in the field of polymer chemistry, can solve the problems of large amount of emulsifier, decrease of mechanical properties of wood-based panels, poor product stability, etc., achieve good hydrophobicity, not easy to foam, and improve water resistance.

Inactive Publication Date: 2010-02-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, my country's research on emulsified paraffin wax has progressed rapidly, and some product technical indicators have caught up with or exceeded similar imported products, but there are still problems such as large amount of emulsifier, poor product stability, and decline in mechanical properties of wood-based panels.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) First, N-methylpyrrolidone, acetone, styrene, methyl acrylate, methyl methacrylate, ethyl acrylate, methacryloyloxyethyltrimethylammonium chloride (DMC), methacryloyl Oxyethyldimethylbenzylammonium chloride, acryloyloxyethyltrimethylammonium chloride, acrylamide, methylolacrylamide and azobisisobutyronitrile according to 1.3:1.7:2:0.2:0.5: Add the mass ratio of 0.3:0.4:0.5:0.7:1:1.5:0.1 into the drying reactor, heat up to 70°C, and keep it warm for 6 hours so that the material system in the reactor is at 25°C and has a solid content of 15%. Viscosity rises to 160mPa.s, then add deionized water, dilute to a solid content of 15%, that is, a soap-free styrene-acrylic polymer with a strong cationic charge is obtained, and it is used as a polymer emulsifier A for solid paraffin;

[0015] 2) Add emulsifier A and paraffin into the reactor at a mass ratio of 2:1, heat up to 70°C, and melt under stirring. After the paraffin is completely melted, add deionized water to dilute ...

Embodiment 2

[0017] 1) First, N-methylpyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide, styrene, ethyl methacrylate, hexyl acrylate, acryloyloxyethyl dimethyl Benzyl benzyl ammonium chloride, p-vinyl benzyl trimethyl ammonium chloride, methylol acrylamide, diacetone acrylamide and azobisisoheptanonitrile at 0.3:0.7:0.5:1:1:0.5: Add the mass ratio of 0.5:0.8:1:1:0.08 into the dry reactor, heat up to 90°C, and keep it warm for 3 hours so that the viscosity of the material system in the reactor rises to 200mPa at 25°C with a solid content of 15%. .s, then add deionized water, and dilute to a solid content of 15%, to obtain a soap-free styrene-acrylic polymer with a strong cationic charge, which is used as a polymer emulsifier A for solid paraffin;

[0018] 2) Add emulsifier A and paraffin into the reactor at a mass ratio of 1:1, heat up to 72°C, and melt under stirring. After the paraffin is completely melted, add deionized water to dilute the system to a solid content of 30% , and ...

Embodiment 3

[0020] 1) First, mix N-methylpyrrolidone, styrene, methyl acrylate, dimethylaminoethyl methacrylate, benzyl quaternary ammonium chloride, methylol acrylamide and dibenzoyl peroxide at a ratio of 2.5:1.5:2 : The mass ratio of 1.5: 1: 0.09 is added in the dry reactor, heated up to 73°C, and kept for 5 hours so that the viscosity of the material system in the reactor rises to 180mPa.s at 25°C with a solid content of 15%. Add deionized water then, dilute to solid content and be 15%, promptly make the non-soap styrene-acrylic polymer with strong cationic charge, use it as the macromolecular emulsifier A of solid paraffin;

[0021] 2) Add emulsifier A and paraffin into the reactor at a mass ratio of 1.5:1, heat up to 76°C, and melt under stirring. After the paraffin is completely melted, add deionized water to dilute the system to a solid content of 30%. , and continue to insulate and emulsify for 10 minutes to prepare paraffin wax pre-emulsion B. After the pre-emulsion B is homogen...

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PUM

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Abstract

The invention discloses a method for preparing a waterproofing agent of a saponin-free cation paraffin emulsion artificial board. The method comprises the following steps: under the function of a cosolvent which can be mutually soluble to water, taking vinyl monomers, such as styrene, an acrylate class monomer, a cation monomer, acrylamide and a derivative thereof and the like, as a copolymerization monomer and preparing a saponin-free benzene polymer with strong cation charges by a saponin-free emulsion polymerization method; taking the saponin-free benzene polymer as a high molecular emulsifying agent of solid paraffin, emulsifying and dispersing the paraffin and preparing the waterproofing agent of the saponin-free cation paraffin emulsion artificial board with favorable stability by homogenizing at high pressure. The invention overcomes the defects of poor waterproof effect, poor stability, easy bubbling of emulsion and the like due to the addition of a small molecular emulsifyingagent in the traditional paraffin emulsion; the product adopts the saponin-free benzene polymer with strong cation charges as the high molecular emulsifying agent of the solid paraffin, and the high molecular emulsifying agent which can generate a very strong hydrogen bond function with fibre in the artificial board not only enhances the water resistance of a board material but also can enhance the physical strength of the artificial board.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, in particular to a preparation method of a soap-free cationic paraffin emulsion water-proofing agent for artificial boards. Background technique [0002] Water resistance is one of the main performance indicators of wood-based panels. The domestic wood-based panel industry mainly uses solid paraffin or melted paraffin as waterproof additives. The waterproof principle is a physical phenomenon that blocks the pores between fibers. This phenomenon can effectively Improve the waterproof performance of wood-based panels, but also reduce the bonding fastness between fibers. After the 1960s, with the continuous improvement of the wood-based panel manufacturing process. Developed countries have successively replaced paraffin with emulsified paraffin, which not only reduces the consumption of wax, but also improves the quality of the product. In recent years, my country's research on emulsified paraffin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/40C09K3/18B01F17/52C08F212/08C08F220/34C08F220/58C08F220/18
Inventor 李小瑞沈一丁费贵强李刚辉王海花刘钦
Owner SHAANXI UNIV OF SCI & TECH
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