Aldehyde-free vegetable protein-based wood adhesive as well as preparation and application methods thereof

A wood adhesive and vegetable protein technology, applied in the design and development of environmental protection chemical materials, can solve the problems of poor initial viscosity, unfavorable coating, high viscosity, etc., and overcome the problems of poor water resistance, check strength and high water resistance Effect

Inactive Publication Date: 2015-05-13
乌鲁木齐奥森碳环生物能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a formaldehyde-free vegetable protein-based wood adhesive and its preparation and use method, which not only solves the problems of poor initial viscosity and high viscosity of the existing protein-based wood adhesive, which is not conducive to coating, but also can improve the protein Bond strength and water resistance of the base adhesive

Method used

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  • Aldehyde-free vegetable protein-based wood adhesive as well as preparation and application methods thereof
  • Aldehyde-free vegetable protein-based wood adhesive as well as preparation and application methods thereof
  • Aldehyde-free vegetable protein-based wood adhesive as well as preparation and application methods thereof

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Experimental program
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Effect test

Embodiment 1

[0020]Embodiment 1. Add 100 g of water and 0.35 g of sodium hydroxide into a 500 mL three-necked flask, stir to dissolve the sodium hydroxide, then add 3 g of sodium sulfite to the alkali solution, stir well, and prepare a modifier solution. Then add 30 g of defatted soybean flour (50% by weight of protein) to the modifier solution, stir at room temperature for 0.5 h, and stir evenly to obtain a viscous paste. Then add 20g modified polyvinyl alcohol solution (mass concentration 25%) in this viscous paste, stir at room temperature for 10 minutes, then react for 1h; then add 3g polyamide polyamine-epichlorohydrin solution (mass concentration Concentration 12.5%), continue to stir for 10 minutes, until stirring evenly. Finally, 1 g of sodium-based montmorillonite and 3 g of micro-nano fibrils were added, and stirred for 10 minutes to obtain a formaldehyde-free vegetable protein-based wood adhesive. The prepared adhesive was used for the bonding of three-layer poplar boards, and ...

Embodiment 2

[0021] Embodiment 2, preparation method are the same as embodiment 1, difference is that described modifying agent is 0.35g sodium hydroxide and 3g urea. The prepared adhesive was used for the bonding of three-layer poplar boards, and the dry strength and wet strength were tested. The dry strength was 5.10MPa and the wet strength was 1.89MPa, respectively.

Embodiment 3

[0022] Embodiment 3, preparation method is the same as embodiment 1, and difference is that described modifying agent is 0.35g sodium hydroxide and 1g sodium lauryl sulfate. The prepared adhesive was used for the bonding of three-layer poplar boards, and the dry strength and wet strength were tested. The dry strength was 3.45MPa and the wet strength was 1.06MPa, respectively.

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Abstract

The invention belongs to the technical field of design, research and development of environment-friendly chemical materials and specifically relates to an aldehyde-free vegetable protein-based wood adhesive as well as preparation and application methods thereof. The aldehyde-free vegetable protein-based wood adhesive is prepared from the following components in parts by mass: 100 parts of water, 20-40 parts of vegetable protein, 0.1-5 parts of modifier, 20-40 parts of cross-linking agent, 2-20 parts of curing agent, 1-5 parts of packing and 0-3 parts of additive. The finished product is formed by virtue of vegetation protein dissolution, a cross-linking reaction and a curing reaction. The adhesive is mainly applied to a wood material in such a manner of roll coating, scraper coating, curtain coating or spraying, and then a composite wood artificial board can be obtained by virtue of aging, cold pressing and hot pressing.

Description

technical field [0001] The invention belongs to the technical field of design and research and development of environmental protection chemical materials, and specifically relates to a formaldehyde-free vegetable protein-based wood adhesive and its preparation and use method. Background technique [0002] With the depletion of wood resources, people are increasingly using wood-based panel furniture instead of solid wood furniture, so that the amount of adhesives is also increasing. The research and application of adhesives is a time-honored science. As early as prehistoric times, human beings have begun to use natural adhesives such as blood glue, bone glue, and plant extracts. However, due to its disadvantages such as poor water resistance, low solid content, low bonding strength, easy mildew, and short storage period, it was gradually replaced by the developed "trialdehyde glue". At present, "trialdehyde glue" is the main adhesive for wood-based panels, but "trialdehyde g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J129/04C09J163/00C09J11/04C09J11/06C08G59/50
Inventor 许丽萍马汉青
Owner 乌鲁木齐奥森碳环生物能源有限公司
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