Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Wood modification composition and its preparation method and application

A technology of wood modification and composition, which is applied in the direction of impregnating wood, wood impregnation, wood processing equipment, etc., can solve the problems of reducing wood performance, poor wood impregnation effect, inconvenient resin curing, etc., to solve cracking deformation, Improved physical and mechanical properties, good energy saving effect

Inactive Publication Date: 2011-12-28
EVERFIRST WISEFUND TECH BEIJING
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The key factors of chemical modification of wood impregnation are impregnation, curing effect and cost. The most commonly used raw material for wood treatment is urea-formaldehyde resin with low cost. Poor impregnation effect limits its further use
In order to increase its solubility, the traditional method adds alcohol (methanol or ethanol), which increases the cost and increases environmental problems, or in order to ensure the impregnation effect, the impregnation is performed by monomer impregnation. Due to the curing characteristics of urea-formaldehyde resin, The way of monomer is not convenient for the further curing of the resin, which reduces the performance of the impregnated wood

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wood modification composition and its preparation method and application
  • Wood modification composition and its preparation method and application
  • Wood modification composition and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] One, the preparation of wood modification composition

[0041] (1) Preparation of component A: Take 550kg of formaldehyde (37%) and add 30% sodium hydroxide to adjust the pH to 8.0-8.5, add 207kg of urea, heat up to 90°C for 30 minutes, and keep warm for 20 minutes; add citric acid to adjust the pH to 4.6 ~4.8, temperature 90℃, polycondensation reaction 50~60min (refer to 30℃ Tu-4 viscosity 14~20s), adjust pH 7.5~8.0, cool down and discharge.

[0042] (2) Preparation of component B: Take 100kg of formaldehyde (37%), add 23kg of water, add 25% ammonia water to adjust the pH to 8.0-8.5, add 148kg of urea, heat up to 90°C for 30 minutes, keep warm for 15 minutes, adjust the pH to 7.0 with 25% ammonia water. 5-8.0, cooling and discharging;

[0043] The modified composition of the present invention is obtained by mixing component A and component B according to a weight ratio of 1:1, and its properties are shown in Table 1.

[0044] Table 1 Performance of modified compositi...

Embodiment 2

[0053] One, the preparation of wood modification composition

[0054] (1) Preparation of component A: Take 500kg of glyoxal (40%) and add 25% ammonia water to adjust the pH to 8.5-9.0, add 207kg of urea, heat up to 85°C in 35 minutes, keep warm for 30 minutes; add oxalic acid to adjust the pH to 4.8- 5.0, temperature 85°C, polycondensation reaction 40min (refer to 30°C Tu-4 viscosity 14~20s), adjust pH 8.0~8.5, cool down and discharge.

[0055] (2) Preparation of component B: Take 200kg of glyoxal (40%), add 66.7kg of water, add 25% ammonia water to adjust the pH to 8.5-9.0, add 138kg of urea, heat up to 85°C for 35 minutes, keep warm for 35 minutes, 25% ammonia water Adjust the pH to 8.5-9.0, cool down and discharge. ;

[0056] The modified composition of the present invention is obtained by mixing component A and component B according to a weight ratio of 1:1, and its properties are shown in Table 3.

[0057] Table 3 Performance of modified composition of the present inve...

Embodiment 3

[0066] One, the preparation of wood modification composition

[0067] (1) Preparation of component A: Take 580kg of propionaldehyde (100%) and add 25% ammonia water to adjust the pH to 8.5-9.0, add 487kg of triethylenetetramine, heat up to 85°C for 40 minutes, and keep warm for 30 minutes; add oxalic acid to adjust the pH to 3. 8~4.0, temperature 90℃, polycondensation reaction 50min (refer to 30℃ Tu-4 viscosity 14~20s), adjust pH 9.5~10.0, cool down and discharge.

[0068] (2) Preparation of component B: Take 200kg of formaldehyde (37%), add 50kg of water, add 30% sodium hydroxide to adjust the pH to 9.5-10.0, add 180kg of triethylenetetramine, heat up to 90°C in 45 minutes, and keep the temperature for 40 minutes. % ammonia water to adjust the pH to 9.5-10.0, cool down and discharge. ;

[0069] The modified composition of the present invention is obtained by mixing component A and component B according to a weight ratio of 1:1, and its properties are shown in Table 5.

[0...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a wood modification composition, a preparation method and application thereof, and belongs to the field of forestry chemical industry. The wood modification composition of the present invention is composed of a mixture of low-molecular urea-formaldehyde resin and methylol urea; the mixture of methylol urea is mainly composed of monomethylol urea and dimethylol urea. The wood modification composition of the present invention has the characteristics of low viscosity, good water solubility, good storage stability, etc., and is suitable for the needs of vacuum pressure impregnation of various tree species, especially suitable for densification of low-grade artificial forests, increasing functions, etc. Use needs. After the wood modification composition of the present invention is used to modify the artificial forest wood, the dimensional stability of the wood is significantly improved, defects such as cracking and deformation during use before treatment can be overcome, and the physical and mechanical properties are obviously improved. When the wood modification composition of the present invention is used in combination with functional agents such as flame retardants and preservatives with good water solubility, the properties of fire resistance, moth resistance, mildew resistance and corrosion resistance of wood can also be improved.

Description

technical field [0001] The present invention relates to a composition for treating wood, in particular to a low-molecular resin composition for wood vacuum pressure impregnation modification and a preparation method thereof, and also relates to the application of the wood modification composition in wood vacuum pressure impregnation modification , belonging to the field of forestry chemical industry. Background technique [0002] Wood is a friend of human beings, and it is the only renewable resource among the four major building materials (steel, wood, cement, plastic) recognized today. However, my country is a country with relatively insufficient forest resources, and the per capita forest stock volume is only the world average level. 1 / 6 of. In recent years, due to people's over-exploitation, forest resources worldwide have declined sharply. The reduction of tropical rainforest in some parts of South America, the destruction of primary forest in some African countries, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/50B27K3/08
Inventor 雷得定邓雄飞
Owner EVERFIRST WISEFUND TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com