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High water-resistant wood adhesive material

A wood adhesive, water-resistant technology, applied in the direction of adhesives, polymer adhesive additives, non-polymer adhesive additives, etc. The effect of improving water resistance protection performance

Inactive Publication Date: 2019-11-26
宁波大秋石化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Technical problem to be solved by the present invention: sodium silicate is a common ionic compound, so when it is mixed with water, water molecules can easily replace the position of sodium ions, compared with organic glue combined with covalent bonds Adhesives, silicate adhesives with ionic bonds have rigid structures, are relatively brittle and have weak cohesive forces, and provide a highly water-resistant wood adhesive material

Method used

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  • High water-resistant wood adhesive material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In terms of parts by weight, weigh 45 parts of polyether polyol mixture, 3 parts of plasticizer TXIB and 1 part of DOP into a three-necked flask, stir and mix, heat in an oil bath at 110°C, and evacuate to 45Pa , stirred and mixed and allowed to cool down to 55°C. The reaction solution was collected during the heat preservation reaction and counted in parts by weight. Weighed 45 parts of the reaction solution, 6 parts of isocyanate and 1 part of dibutyltin dilaurate and placed them in a three-necked flask, and stirred Mix and place at 75°C for heat preservation reaction for 2 hours, let stand and cool to 55°C, and discharge to obtain modified elastic filler; in parts by weight, weigh 45 parts of deionized water, 1 part of flat plus O, 1 1 part of Span-80 and 3 parts of polyethylene glycol were placed in a three-necked flask, stirred and mixed, and the mixture was collected. According to the mass ratio of 1:5, isobutyltriethoxysilane was added dropwise to the mixture to c...

Embodiment 2

[0028] In terms of parts by weight, weigh 47 parts of polyether polyol mixture, 4 parts of plasticizer TXIB and 1 part of DOP in a three-necked flask, stir and mix and heat in an oil bath at 115°C, and vacuumize to 47Pa , stirred and mixed and allowed to cool down to 57°C. The reaction solution was collected during the heat preservation reaction and counted in parts by weight. Weighed 47 parts of the reaction solution, 7 parts of isocyanate and 1 part of dibutyltin dilaurate and placed them in a three-necked flask. Stir Mix and place at 80°C for heat preservation reaction for 2 hours, let it stand and cool to 57°C, and discharge to obtain a modified elastic filler; in parts by weight, weigh 47 parts of deionized water, 1 part of flat plus O, 1 One part of Span-80 and 4 parts of polyethylene glycol were placed in a three-necked flask, stirred and mixed to collect the mixed material, and isobutyltriethoxysilane was added dropwise to the mixed material in a mass ratio of 1:5 to co...

Embodiment 3

[0030] In terms of parts by weight, weigh 50 parts of polyether polyol mixture, 5 parts of plasticizer TXIB and 2 parts of DOP into a three-necked flask, stir and mix, heat in an oil bath at 120°C, and evacuate to 50Pa , stir and mix and let stand to cool down to 65°C. The reaction solution collected during the heat preservation reaction is counted in parts by weight. Weigh 50 parts of the reaction solution, 8 parts of isocyanate and 2 parts of dibutyltin dilaurate and place them in a three-necked flask. Stir Mix and place at 85°C for heat preservation for 3 hours, let stand and cool to 65°C, and discharge to obtain a modified elastic filler; by weight parts, weigh 50 parts of deionized water, 2 parts of flat plus O, 2 Put one part of Span-80 and 5 parts of polyethylene glycol in a three-necked flask, stir and mix and collect the mixed material, and add isobutyltriethoxysilane dropwise to the mixed material according to the mass ratio of 1:5, and control The dropping rate is 2...

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Abstract

The invention relates to a high water-resistant wood adhesive material, belonging to the technical field of the adhesive. Through effective coating and modifying, and loading of hydrophobic units forprotection, the crosslinking of polyethylene glycol and sodium silicate is promoted, as the degree of crosslinking increases, more crosslinked chemical bonds can be formed, which can effectively improve the water resistance of the adhesive, at that same time, the bonding strength of silicate adhesives has been greatly improved through crosslinking copolymerization reaction, and the structure of sodium silicate, so as to make it bigger, a condense into the network structure, the formed network should have large meshes, by effectively filling elastomer particles with water resistance, furthermore, the water-resistant property of the material after using the dense adhesive is good, which effectively solves the key problem that the interface fusion between inorganic adhesive and wood materialis difficult because of the strong rigidity of existing silicate molecules and the difference of physical and chemical properties between inorganic and organic materials.

Description

technical field [0001] The invention relates to a highly water-resistant wood adhesive material, which belongs to the technical field of adhesives. Background technique [0002] With the continuous consumption of raw materials and the continuous development of science and technology, the raw material structure of wood-based panels has undergone fundamental changes. From the original large-diameter natural forest wood to the fast-growing small-diameter wood, the use of crop stalk resources to produce wood-based panels has increased year by year, and the sustainable development of the economy and the improvement of people's living standards have also increased the demand for wood materials. is constantly improving. The main way to solve this contradiction is to use the bonding technology to glue, reorganize and compound wood fiber raw materials of different specifications and properties (such as small wood squares, veneers, shavings, fibers, etc.) to produce products suitable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J129/04C09J11/04C09J11/06C09J11/08C08G18/48
CPCC08G18/4804C09J11/04C09J11/06C09J11/08C09J175/08C08L29/04C08K13/02C08K3/34
Inventor 陈彦斌
Owner 宁波大秋石化有限公司
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