Method for acetylation of wood parts

A technology of acetylation and wood, applied in the field of acetylation of wood parts, can solve problems such as poor durability

Active Publication Date: 2016-03-02
TITAN WOOD LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing panels also showed poorer durability when tested against bioerosion compared to panels made from acetylated wood elements

Method used

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  • Method for acetylation of wood parts
  • Method for acetylation of wood parts
  • Method for acetylation of wood parts

Examples

Experimental program
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Embodiment Construction

[0026] In an embodiment of the method of the invention, wood chips (approximately 40 mm x 40 mm x 10 mm) derived from spruce and having a moisture content of 4 to 10 wt % are placed in wire mesh walled baskets (to allow easy passage of fluid ), and placed in a pressure reactor. A vacuum of -0.95 bar was then applied to the chips for 5 minutes. Then, a preheated acetylation fluid at 130°C (comprising a mixture of 95% acetic anhydride and 5% acetic acid) was introduced into the reactor, which was subjected to a pressure of 10 bar for 10 minutes. The reactor was then drained and the wood chips were exposed to circulating nitrogen heated to 145°C for 60 minutes. During this part of the process, the pressure in the reactor may rise to 1 to 2 bar. After the pressure has been released, the acetylated wood chips are vacuum dried at -0.92 bar and cooled for 5 to 10 hours, usually 6-7 hours in total (ie drying and cooling). The level of acetylation was about 20% of the acetyl content...

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PUM

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Abstract

A composite wood product comprising acetylated wood portions, characterized in that the average thickness expansion does not exceed 5% after being subjected to 25 wet-dry / freeze-thaw cycles as described in Table II. Alternative properties include modulus of elasticity and modulus of rupture, and flexural strength. A two-stage process for the acetylation of wood fractions is also described.

Description

technical field [0001] The present invention relates to undecorated or decorated boards and / or moldings, in particular to wood chips, wood chips, wood fibers and / or cellulose fibers pressed into single or multiple lap core layers (lap core layers) in buildings Indoor or outdoor applications in which the wood is partially acetylated, impregnated with a synthetic resin as a binder, cured with heat and pressed. For convenience, these panels / panels will be referred to as "composites" and generally include engineered wood products such as medium density fiberboard, oriented strand board, and particle board, primarily from softwood stock such as spruce or pine. Background technique [0002] Articles comprising such composite materials may be used for exterior facade cladding of buildings; exterior siding applications; structural applications in insulation and bracing; cladding of fences, roofs and floors, balconies; or cladding or cladding ; or can also be used for lining walls o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08H8/00C08G18/64
CPCC08G18/6492C08G18/7664C08H8/00C08L97/02C09J161/06C09J175/04Y10T428/2982Y10T428/25Y10T428/31986Y10T428/662Y10T428/31971Y10T428/31989Y02W30/91B05D3/0254B05D3/0473B27K3/34B27M1/08C08G18/64C09J165/02C09J175/00
Inventor 米歇尔·马斯贝诺·波尔
Owner TITAN WOOD LTD
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