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Polymeric composition for cellulosic materials binding and modification

A composition and polymer technology, applied in the direction of polymer impregnation, thin material treatment, wood treatment, etc.

Active Publication Date: 2011-06-22
格林百奥生态材料科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyester resins are not currently widely used as wood adhesives or wood raw material modification resins

Method used

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  • Polymeric composition for cellulosic materials binding and modification

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 5.0 kg of butane tetracarboxylic acid, 20.0 kg of citric acid and 15.6 kg of maltodextrin were mixed with 80.0 kg of water until the solution became clear and a mixed composition was formed. Some poplar solid wood planks were placed in an autoclave, which was then evacuated to about 80% vacuum. The mixed composition was then transferred to an autoclave. When the autoclave was filled with the mixed composition liquid, the system was pressurized and maintained for about 3 hours. The impregnated wood boards were dried in an oven heated to 100°C for about 24 hours to allow the mixed composition to react to form a cross-linked polymer. The resulting treated wood had a specific gravity of about 0.6 g / ml compared to a corresponding untreated wood of about 0.32 g / ml. The treated wood exhibits enhanced mechanical properties.

Embodiment 2

[0032] 5kg of butane tetracarboxylic acid, 20kg of citric acid, 1kg of itaconic acid, 18kg of maltodextrin and 5kg of 20% by weight of polyvinyl alcohol 5000 in water, and 0.5kg of zinc acetate, 0.4kg of Boric acid and 80 kg of water were mixed to form a mixed composition. Some solid radiata pine planks were placed in an autoclave, which was then evacuated to a vacuum of about 80%. The mixed composition was then transferred to an autoclave. When the autoclave was filled with the mixed composition liquid, the system was pressurized and maintained for 3 hours. The impregnated boards were dried in an oven and heated to about 100°C for about 24 hours. The resulting treated wood had a specific gravity of about 0.7 g / ml compared to a corresponding untreated wood of about 0.45 g / ml. The Janka hardness of the treated wood reaches about 1600 pound-force.

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Abstract

A polymer composition suitable for wood treatment or binding comprises a reaction product of at least a polyol and at least a crosslinking agent. The crosslinking agent has at least 2 carboxylic acid groups per molecule. A wood product comprising a wood substrate and a polymer composition as well as a wood treatment process are also disclosed.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application 60 / 947,649, filed July 2, 2007, which is hereby incorporated by reference into this application. technical field [0003] The fields to which the present disclosure pertains include wood bonding and wood treatment. Background technique [0004] The polymer compositions have been used for the treatment of wood raw materials and for the gluing of wood raw materials. Several wood treatment compositions and processes are disclosed in US Patent Nos. 5,770.319 and 5,162,394. [0005] Typically, polyester resins are synthesized by the reaction of a monomer containing about 2 hydroxyl groups with another monomer containing about 2 carboxylic acid groups. To produce high molecular weight resins with practical mechanical strength, the two monomers need to be completely free of impurities that could cause side reactions, and the molar ratio of hydroxyl to carboxyli...

Claims

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Application Information

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IPC IPC(8): C09D101/00C09D103/00
CPCB05D2203/20B05D3/0493B27K3/15B05D1/18B27K5/065C08L29/04B27K2200/30Y10T428/31975Y10T428/249954
Inventor 王寅
Owner 格林百奥生态材料科技(上海)有限公司
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