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A method of in-situ self-assembly in solid wood to prepare polyurethane-reinforced wood

A self-assembly, polyurethane technology, applied in the direction of impregnated wood, wood impregnation, wood processing utensils, etc., to achieve high added value and market prospects, not easy to crack, high internal bonding strength

Active Publication Date: 2017-01-04
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, although imitation wood materials can be used instead of wood to a certain extent, they are still inferior to real wood in some aspects, such as the natural texture of wood, such as the precious characteristics of some special wood, so it is still necessary to modify wood. is an indispensable technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0030] (1) 110 parts of polyether polyol (EP-330NG), 50 parts of 1,4-butanediol (1,4-BDO), 1,4-diazabicyclo[2.2.2]octane (DABCO) 10 parts, 40 parts of silicone oil, 20 parts of dimethyl methyl phosphate, 10 parts of hematoxylin, dehydrated in vacuum at 110°C and 0.01MPa for 3.0h after being alone or mixed, and then cooled to room temperature. Mix it with 100 parts of toluene diisocyanate (TDI), stir well, and use it as a modifier for later use.

[0031] (2) Dry the balsam pea floor sawn timber with a size of 910mm×123mm×18mm in a drying kiln according to the drying standard, and then adjust the moisture content to 10%.

[0032] (3) Put the balsamic pea floor sawn timber into the vacuum high-pressure impregnation tank; turn on the vacuum pump to evacuate the tank, and maintain the pressure in the tank at 0.01MPa for 60 minutes; open the liquid inlet valve to pump the modifier into the impregnation tank to make the liquid The surface is completely covered with balsamic pea floo...

Embodiment example 2

[0037] (1) 80 parts of epoxy (E-51), 50 parts of 2-methyl-1,3 propanediol (MPD), 10 parts of dimethylcyclohexylamine (DMCHA), 80 parts of silicone oil, dimethylphosphoric acid 80 parts of methyl ester, 30 parts of carmine pigment, alone or mixed, vacuum dehydrated at 120°C and 0.01MPa for 2.0h, and then cooled to room temperature. Mix it with 100 parts of diphenylmethane diisocyanate (MDI), stir well, and use it as a modifier for later use.

[0038] (2) Dry the rubber wood plank with a specification of 2400mm×400mm×22mm in a drying kiln according to the drying standard, and then adjust the moisture content to 10%.

[0039] (3) Put the rubber wood square into the vacuum high-pressure impregnation tank; turn on the vacuum pump to evacuate, and the pressure in the tank is 0.01MPa and maintain it for 60 minutes; open the liquid inlet valve to pump the modifier into the impregnation tank to completely cover the liquid surface Rubber board square, impregnated for 2.0 h under the pr...

Embodiment example 3

[0044] (1) 80 parts of epoxy (E-51), 50 parts of 2-methyl-1,3 propanediol (MPD), 10 parts of dimethylcyclohexylamine (DMCHA), 80 parts of silicone oil, dimethylphosphoric acid 80 parts of methyl ester, 30 parts of carmine pigment, alone or mixed, vacuum dehydrated at 120°C and 0.01MPa for 2.0h, and then cooled to room temperature. Mix it with 100 parts of diphenylmethane diisocyanate (MDI), stir well, and use it as a modifier for later use.

[0045] (2) Dry poplar sawn timber with a specification of 2400mm×400mm×50mm in a drying kiln according to the drying standard, and then adjust the moisture content to 16%.

[0046] (3) Put the poplar sawn timber into the vacuum high-pressure impregnation tank; turn on the vacuum pump to evacuate, and maintain the pressure in the tank at 0.01MPa for 1.5h; open the liquid inlet valve to pump the modifier into the impregnation tank to make the liquid level Completely cover poplar sawn timber, impregnate for 4.0h under the pressure of 1.8MPa...

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Abstract

The invention discloses a method of in-situ self-assembly in solid wood to prepare polyurethane reinforced wood. The method comprises the following steps: utilizing a vacuum high-pressure technology to impregnate isocyanate monomers, vacuum dehydrated polyalcohol, a chain extender, a cross-linking agent, a catalyst and other modifiers which are uniformly mixed to inside of the wood; then ageing, homogenizing and taking a polymerization reaction by heating or microwave to allow the isocyanate and the polyalcohol to take the polymerization reaction on the internal surface of the wood pores, so as to forming the polyurethane reinforced wood. The wood prepared with the method is of the excellent performances of wood and polyurethane, can be applied to various fields, and has high additional value and market prospect.

Description

technical field [0001] The invention is a method for preparing polyurethane reinforced wood by in-situ self-assembly in solid wood, which belongs to the technical field of wood strengthening functional improvement and high-value utilization, and particularly relates to the filling and strengthening of solid wood such as logs, sawn timber, and planks and high additional value utilization. Background technique [0002] Wooden materials are one of the four major building decoration materials. Wooden materials have natural texture and aesthetic feeling. Since ancient times, people have cherished the characteristics of color, fragrance, quality, and grain of wood, and have widely used them in construction, furniture, etc. working and living environment. It is non-toxic, harmless, and is the only "green material" that is renewable and sustainable. With the improvement of people's living standards, the demand for high-grade precious wood is increasing day by day. However, many w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/58B27K3/08B27K3/15B27K3/50
Inventor 胡云楚陈旬袁利萍田梁材王洁吴义强
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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