Timber adhesive and preparation method thereof

A technology of wood adhesives and plant glues, applied in the direction of adhesive additives, adhesive types, starch-derived adhesives, etc., can solve the problems of low bonding strength and poor durability, and achieve good modeling and dispersion , Overcoming the effects of low bonding strength and strong adhesion

Active Publication Date: 2013-03-20
苏州市德莱尔建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a wood adhesive, modify the natural polymer to obtain a formaldehyde-free adhesive, and overcome the defects of the current water-based formaldehyde-free wood adhesives such as low bonding strength and poor durability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A wood adhesive, comprising the following components by weight: 100 parts of starch, 80 parts of water, 15 parts of vinyl acetate, 5 parts of borax, 0.4 part of polyglycidyl ether, 2 parts of glycerin, talcum powder 5 parts, 0.05 parts of paraben ester.

[0016] Mix starch with water, water temperature 50°C, stir and moisten, then add vinyl acetate, adjust pH value to 6 with phosphoric acid, heat to 60°C, stir for 3 hours to obtain translucent modified vegetable gum; then mix with borax and glycerin , polyglycidyl ether, talc, and paraben were mixed at room temperature, heated to 95°C and stirred for 30 minutes, cooled to below 45°C and discharged. The obtained adhesive had a solid content of 35%-45%, a viscosity of 2.2 Pa·s, and an average bonding strength of 1.48 MPa in the press plate test.

Embodiment 2

[0018] A wood adhesive, comprising the following components by weight: 100 parts of dextrin, 160 parts of water, 10 parts of tributyl phosphate, 15 parts of borax, 0.2 parts of polyglycidyl ether, 3 parts of glycerin, 3 parts of asbestos powder, 0.1 part of paraben ester.

[0019] Mix dextrin with water, the water temperature is 60°C, stir and moisten, then add tributyl phosphate, adjust the pH value to 6 with phosphoric acid, heat to 80°C, stir for 2 hours to obtain translucent modified vegetable gum; then mix with borax , glycerin, polyglycidyl ether, asbestos powder, and paraben are mixed at room temperature, heated to 85°C and stirred for 60 minutes, cooled to below 45°C and discharged. The obtained adhesive had a solid content of 35%-45%, a viscosity of 2.5 Pa·s, and an average bonding strength of 1.54 MPa in the press plate test.

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PUM

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Abstract

The invention provides a timber adhesive which comprises, by weight, 100 parts of vegetable gelatin, 80 to 160 parts of water, 10 to 15 parts of a modifier, 5 to 15 parts of borax, 0.2 to 0.4 part of polyepoxy glyceryl ether, 2 to 3 parts of glycerin, 3 to 5 parts of a filling material and 0.05 to 0.1 part of nipagin ester, wherein the vegetable gelatin is starch or dextrin, the modifier is tributyl phosphate or vinyl acetate, and the filling material is talcum powder, asbestos powder or titanium dioxide. According to the invention, the natural polymer vegetable gelatin is modified so as to prepare the formaldehyde-free adhesive, and the adhesive has the advantages of strong adhesiveness, mold forming performance and good dispersibility and overcomes the defects of low bonding strength and poor endurance of current aqueous formaldehyde-free timber adhesives.

Description

technical field [0001] The invention relates to a wood adhesive and a preparation method thereof, belonging to the technical field of adhesives. Background technique [0002] With the improvement of people's awareness of environmental protection, more and more people begin to pay attention to the pollution problems caused by home decoration, among which the most direct relationship to people's health is indoor formaldehyde release. Formaldehyde widely exists in paint and furniture. In order to avoid the harm of formaldehyde to people, many people prefer to choose solid wood furniture. However, my country's forest resources are scarce and wood is scarce. It is of great significance to prepare wood-based panels to replace wood. It is essential to use a large amount of wood adhesives in the processing of wood-based panels. The adhesives used in the wood industry are mainly "three-formaldehyde resins", namely urea-formaldehyde resins, phenolic resins and melamine-formalde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/06C09J11/04C09J11/06C09J11/08
Inventor 计慷
Owner 苏州市德莱尔建材科技有限公司
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