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Low-grade fast-growing wood modification solution, its preparation method and application
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A kind of wood modification and low-grade technology, which is applied in the direction of impregnated wood, wood impregnation, wood processing utensils, etc.
Inactive Publication Date: 2015-04-01
EVERFIRST WISEFUND TECH BEIJING
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Problems solved by technology
Wood modification technology using contemporary physical and chemical methods has not yet been able to be industrialized
Method used
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Embodiment 1
[0030] Synthesis of wood modification solution: In a reaction kettle, add 100kg of formaldehyde and 50kg of water, adjust the pH to 9.0-10.0 with sodiumhydroxide, add 95g of melamine and 5kg of hexanehexanol, and then raise the temperature to 90-95°C for 20 minutes; Cool down to 85°C, add 10kg of urea, react for 10 minutes; cool down to 60°C, adjust pH=7.0-7.5, add 20kg of styrene-acrylic emulsion; cool down to below 40°C and discharge.
[0031] Preparation of wood impregnation solution: Add 100kg of wood modification solution, 80kg of water, 2kg of ammoniumchloride and 1kg of urotropine into the preparation tank, and stir evenly.
[0032] Solid content of impregnation solution: 24.8%, pH7.0-7.5, viscosity: 11.6s, storage period: 30 days
Embodiment 2
[0034] Synthesis of wood modification solution: In a reaction kettle, add 100kg of formaldehyde and 50kg of water, adjust the pH to 9.0-10.0 with sodiumhydroxide, add 85kg of melamine and 7kg of hexyl alcohol, and then raise the temperature to 90-95°C for 20 minutes; Cool down to 85°C, add 15kg of urea, react for 10 minutes; cool down to 60°C, adjust pH=7.0-7.5, add 20kg of polyvinyl acetateemulsion; cool down to below 40°C and discharge.
[0035] Preparation of wood impregnation solution: Add 100kg of wood modification solution, 90kg of water, and 1kg of ammoniumsulfate into the preparation tank, and stir evenly.
[0036] Solid content of impregnation solution: 25.5%, pH7.0-7.5, viscosity: 12.3s, storage period: 30 days
Embodiment 3
[0038] Synthesis of wood modification solution: Add 100kg of formaldehyde and 40kg of water to the reaction kettle, adjust the pH to 9.0-10.0 with sodiumhydroxide, add 75kg of melamine and 8kg of hexanehexanol, and then raise the temperature to 90-95°C for 20 minutes; Cool down to 85°C, add 20kg of urea, react for 10 minutes; cool down to 60°C, adjust pH=7.0-7.5, add 30kg of acrylic acidemulsion; cool down to below 40°C and discharge.
[0039] Preparation of wood impregnation solution: Add 100kg of wood modification solution, 60kg of water, and 2kg of ammoniumchloride into the preparation tank, and stir evenly.
[0040] Solid content of impregnation solution: 31.5%, pH7.0-7.5, viscosity: 12.8s, storage period: 30 days
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Abstract
The present invention relates to a wood modification method, in particular to a low-grade fast-growing wood modification solution, its preparation method and application. The wood modification solution of the invention is prepared through a synthesis reaction of formaldehyde, melamine, urea, a toughening agent, a stabilizer and water. By adding the toughening agent in the synthetic process, the wood embrittlement problem is overcome. At the same time, the stabilizer is added during synthesis, so that active groups of melamine-formaldehyde resin are enclosed, and polymerization of the melamine-formaldehyde resin can be prevented, thereby improving stability of the wood modification solution and prolonging the storage period. Compared with untreated wood, the wood treated by the modification solution of the invention has a density increased by 30-40%, hardness increased by 80-150% and a volume expansion rate up to 69%, and the release amount of formaldehyde reaches the E1 grade requirements of national standards.
Description
technical field [0001] The invention relates to a method for modifying wood, in particular to a method for modifying low-grade fast-growing wood, including the modified liquid used, its preparation method and application. Background technique [0002] my country is a major consumer of timber and wood products in the world, but it is also one of the countries with the least per capita forest (timber) resources. With the rapid and stable development of my country's national economy and the continuous improvement of people's living standards, the contradiction between supply and demand of my country's timber has further intensified. In recent years, the Chinese government has vigorously promoted the construction of artificial fast-growing forests and actively increased the supply of domestic timber, which has eased the contradiction between supply and demand of timber to a certain extent. However, due to the loose material, easy cracking and deformation, and resistance to deca...
Claims
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Application Information
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