Resin composition for modifying wood, method for preparing same and application thereof

A resin composition and wood modification technology, applied in wood modification, a composition for wood vacuum pressure impregnation modification and preparation thereof, and the field of compositions for treating wood, which can solve the problem of inconvenient resin curing, Increase environmental problems, reduce wood performance and other problems, to improve physical and mechanical properties, improve dimensional stability, and solve the effects of cracking and deformation

Inactive Publication Date: 2009-12-16
EVERFIRST WISEFUND TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Similar method, as application number is 98114271.0 Chinese invention patent application (name of invention: a kind of wood modification method) provided with rosin, synthetic resin (SBS), styrene, gasoline, ethanol, dimethyl ester, anti-aging agent , The modified solvent prepared by the anti-oxidant is used as the raw material to impregnate the wood. The cost of the raw material is high and complicated, which limits the promotion and application of these methods.
[0010] The key factors of wood modification are impregnation, curing effect and cost. The most commonly used raw material for wood modification is low-cost urea-formaldehyde resin. However, urea-forma...

Method used

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  • Resin composition for modifying wood, method for preparing same and application thereof
  • Resin composition for modifying wood, method for preparing same and application thereof
  • Resin composition for modifying wood, method for preparing same and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Preparation of resin composition for wood modification

[0041] Take 37% formaldehyde (w / v) 568Kg and add hexamethylenetetramine to adjust the pH to 8.0, heat, add 280Kg urea within 30°C, heat up to 85°C in 30min, keep for 30min; add 377Kg water and add 20% ammonia ( w / v) Adjust pH to 8.3, and cool down to below 40°C for discharging.

[0042] The properties of the resin composition for wood modification prepared in this example are shown in Table 1.

[0043] Table 1 Various properties of resin composition for wood modification

[0044] pH

Solid content / %

Viscosity (coated 4 cups, 25℃) / S

Immersion liquid performance

8.3

38.71

10’60

[0045] 2. Application of Resin Composition for Wood Modification

[0046] (1) Put 40L of paulownia wood to be treated into a 110L pressurized impregnation tank and then evacuated, and suck in about 80L under the vacuum condition of -0.09~-0.095MPa. The wood modification prepared in this examp...

Embodiment 2

[0053] 1. Preparation of resin composition for wood modification

[0054] Take 40% acetaldehyde (w / v) 1027Kg and 20% ammonia water (w / v) to adjust the pH to 8.5, heat, add 280Kg of urea within 30℃, heat up to 90℃ for 30min, keep it warm for 40min; add 420Kg of water and add 20 % Ammonia water (w / v) is adjusted to pH 8.5, and the temperature is lowered to below 40°C for discharging.

[0055] The properties of the resin composition for wood modification prepared in this example are shown in Table 3.

[0056] Table 3 Various properties of resin composition for wood modification

[0057] pH

Solid content / %

Viscosity (coated 4 cups, 25℃) / S

Immersion liquid performance

8.5

38.20

11’30

[0058] 2. Application of Resin Composition for Wood Modification

[0059] (1) Put 40L of paulownia wood to be treated into a 110L pressurized impregnation tank and then evacuated, and suck in about 80L under the vacuum condition of -0.09~-0.095MPa. The w...

Embodiment 3

[0066] 1. Preparation of resin composition for wood modification

[0067] Take 37% formaldehyde (w / v) 649Kg and 20% ammonia water (w / v) to adjust the pH to 8.0, heat, add 204Kg of acetyl urea within 30℃, heat up to 90℃ in 40min, keep it warm for 40min; add 257Kg of water and add 20 % Ammonia water (w / v) is adjusted to pH 8.0, and the temperature is lowered to below 40°C for discharging.

[0068] The properties of the resin composition for wood modification prepared in this example are shown in Table 5.

[0069] Table 5 Various properties of resin composition for wood modification

[0070] pH

Solid content / %

Viscosity (coated 4 cups, 25℃) / S

Immersion liquid performance

8.0

37.10

10’40

[0071] 2. Application of Resin Composition for Wood Modification

[0072] (1) Put 40L of paulownia wood to be treated into a 110L pressurized impregnation tank and then evacuated, and suck in about 80L under the vacuum condition of -0.09~-0.095MPa. ...

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PUM

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Abstract

The invention discloses a resin composition for modifying wood, a method for preparing the same and application thereof. In the method, aldehydes and organic compounds containing nitrogen undergo hydroxymethylation under the weak alkali condition according to a molar ratio of between 0.5 and 2.5:1 to obtain a low-molecule urea-formaldehyde resin prepolymer which has the characteristics of low viscosity, good water solubility, high storing stability and the like, meets the using requirements of various trees on vacuum pressure impregnation, particularly the using requirements on the aspects of thickening low-grade artificial forest, adding functions and the like, obviously improves the size stability of wood, improves the physical and mechanical properties of wood, and overcomes the defects of cracking, deformation and the like, which are caused when the low-molecule urea-formaldehyde resin prepolymer is used. When used together with functional reagents such as a fire retardant, an antiseptic and the like which are good in water solubility, the resin composition can effectively improve the properties of wood in the aspects of fire retardation, anti-moth, rot resistance, antisepsis and the like.

Description

Technical field [0001] The present invention relates to a composition for treating wood, in particular to a composition used for wood vacuum and pressure impregnation modification and a preparation method thereof. The present invention also relates to the application of the composition in wood modification, and belongs to the field of forestry chemical industry. Background technique [0002] my country is a big consumer of wood and wood products in the world, and it is also one of the countries with the least per capita forest (timber) resources in the world. With the rapid and stable economic development and the improvement of people's living standards, the consumption of wood in our country has further increased, and the contradiction between supply and demand has further intensified. In 2006, my country’s total wood consumption was 337 million m 3 , Of which 245 million m of industrial \ construction materials 3 , Domestic supply of 140~150 million m 3 , The supply gap in the ...

Claims

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Application Information

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IPC IPC(8): B27K3/50
Inventor 雷得定邓雄飞
Owner EVERFIRST WISEFUND TECH BEIJING
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