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High-permeability resin type timber enhancing modifier and efficient immersion treatment control method

A technology of enhancing modifier and impregnating treatment, which is applied in wood treatment, wood impregnation, and wood treatment details, etc. It can solve the problems of affecting paint and glue performance, high molecular weight of modifying liquid, and short storage period of chemicals, etc., and achieve mildew resistance Good anti-corrosion performance, improved wood performance, good use effect

Inactive Publication Date: 2016-05-11
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems existing in resin impregnation modification: the molecular weight of the modified liquid is too large and the viscosity is high, which makes it difficult to achieve uniform and effective penetration of large-size plates; during the preparation of the modified liquid, the content of free formaldehyde exceeds the standard, which is harmful to the human body and the environment; The storage period of the agent is short, and it is easy to be turbid in a short period of time, so it cannot be reused; the surface of the modified wood absorbs moisture, which affects the performance of paint and glue; the resin impregnation enhancement treatment often causes the toughness to decrease while improving the strength of the wood; the comprehensive cost of modification treatment is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 10kg of melamine, 1kg of polyvinyl alcohol, and 4kg of polyethylene glycol into the reaction kettle, raise the temperature to 80°C, stir well, adjust the pH value of the solution to 5.0 with acetic acid, keep the temperature at 80°C, and react for 60 minutes; cool down to 60°C , add 38kg formaldehyde and 18kg melamine, adjust the pH value of the solution to 9.0 with sodium hydroxide, keep the temperature at 75°C, and react for 60 minutes; add 10.5kg urea and 17kg methanol, adjust the pH value of the solution to 12, heat up to 70°C, and react 60 minutes; cool down to 65°C, add 2kg of urea, adjust the pH of the solution to 7.5, and continue the reaction; when the mixing ratio of the reaction solution and water is 7, cool down to 40°C, add 3.5kg of dipropylene glycol and 2kg of diglycol alcohol to obtain a high-permeability and high-activity resin-type wood-reinforced toughness modifier. The synthetic impregnation modifier was diluted with water to form a resin solutio...

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Abstract

The invention belongs to a high-permeability resin type timber enhancing modifier and an efficient immersion treatment control method. The method includes: preparing materials according to mole ratio of melamine to formaldehyde to methanol to urea being 1:2-2.5:0.5-1.0:0.2-1.0, wherein the adding amount of flexibilizer is 10-30% of the amount of the melamine. Modified melamine urea resin with good water solubility, high permeability and low molecular weight and used for immersion is prepared by adjusting raw material proportion, using a low-temperature long-time multistage synthesizing process and adding alcohol flexibilizer, polymerization inhibitor and the like. The permeation channels of timber hard in immersion are opened through a multi-time alternating breathing type immersion treatment process, the timber can be permeated evenly, and timber performance is improved greatly. The high-permeability resin type timber enhancing modifier and the efficient immersion treatment control method have the advantages that the timber hard in immersion can be permeated sufficiently, and various performance of the timber can be improved evidently; the fast-growing timber, modified by the method, of a man-made forest is high in density, high in strength, good in toughness, stable in size, flame retardant, capable of preventing mildew and corrosion, good in processing performance, environmental friendly in production, good in use effect, high in additional value, and the like.

Description

technical field [0001] The invention belongs to a high-activity and high-permeability resin-type wood reinforcement modifier capable of effectively penetrating hard-to-impregnate wood and a high-efficiency impregnation treatment control method. Background technique [0002] The area of ​​my country's plantation forest ranks first in the world. Due to the defects of low density, soft material and low strength of plantation forest wood, it needs to be enhanced and modified to realize its high value-added utilization, thereby promoting my country's plantation forest resource advantages to economic advantages. transform. However, impregnation of some woods (such as Chinese fir) has always been a difficult problem that wood modification experts have been trying to overcome. Because fir wood pits are usually deposited by amorphous substances and form a completely encrusted pit membrane, the permeability is poor. Researchers at home and abroad have proposed mechanical treatment, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/50B27K3/52
CPCB27K3/08B27K3/50B27K3/52B27K2240/20B27K2240/30
Inventor 吕文华刘君良柴宇博郑雅娴许茂松王雪玉
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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