Starch-based water-soluble adhesive used for bamboo wood and preparation method thereof
A water-soluble, starch-based technology, applied in the direction of starch-derived adhesives, adhesive types, etc., can solve the problems of harming the body, formaldehyde pollution, etc., and achieve the effect of excellent performance, strong bonding strength and water resistance
Inactive Publication Date: 2011-09-28
ZHEJIANG TIANZHEN BIOLOGICAL ADHESIVE TECH
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Problems solved by technology
[0003] The technical problem to be solved and the technical task proposed by the present invention are to solve the technical defects of formaldehyde polluting the environment and harming the body caused by the formaldehyde glue used as the adhesive used in the existing bamboo composite floor, and provide a kind of starch-based water-soluble bamboo glue Adhesive and preparation method thereof, the adhesive is a formaldehyde-free adhesive, has no pollution to the environment and has high bonding strength and good water resistance
Method used
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[0009] The present invention will be further described below in combination with specific embodiments.
[0010] A kind of starch-based water-soluble bamboo adhesive, it is made up of modified starch, water and water-based epoxy resin dispersion, described modified starch is the modified starch that has carboxyl group and can dissolve in water, described modified The weight-average molecular weight of soluble starch is less than 1200, the mass ratio of modified starch to water is 1:2~2:3, and the molar ratio of epoxy groups in water-based epoxy resin dispersion to carboxyl groups in modified starch is 2:1~1:2.
[0011] The preparation method of the starch-based water-soluble bamboo adhesive of the present invention is as follows: firstly, the modified starch with hydroxyl groups is made, and the modified starch is made of ordinary starch, and firstly, it is added into a three-necked bottle with stirring and a thermometer. 176 grams of starch, 350 grams of trimellitic anhydride...
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The invention relates to the field of an adhesive used for bamboo wood, particularly a starch-based water-soluble adhesive used for bamboo wood and a preparation method thereof. Aiming at the technical defects that the bamboo wood composite floor uses a formaldehyde-type adhesive as the adhesive and brings environmental pollution and human body harm caused by formaldehyde in the prior art, the invention provides the starch-based water-soluble adhesive used for bamboo wood and the preparation method thereof. The starch-based water-soluble adhesive is composed of modified starch, water and an aqueous epoxy resin dispersion, wherein the modified starch contains a carboxyl group and is soluble in water, the weight average molecular weight of the modified starch is smaller than 1200, the weight ratio of the modified starch to water is (1:2)-(2:3), and the mol ratio of the epoxy group in the aqueous epoxy resin dispersion to the carboxyl group in the modified starch is (2:1)-(1:2). In the invention, the aqueous epoxy resin is utilized as a crosslinking monomer to carry out crosslinking on the modified starch, so that the starch-based water-soluble adhesive has strong adhesive strength and water resistance, can be used for the adhesion of bamboo wood, and is a performance-excellent formaldehyde-free water-soluble environmentally-friendly adhesive used for bamboo wood.
Description
technical field [0001] The invention relates to the field of adhesives for bamboo, in particular to a starch-based water-soluble bamboo adhesive and a preparation method thereof. Background technique [0002] In traditional bamboo composite flooring, three-aldehyde glue is often used as an adhesive for the bonding between multi-layer boards. This adhesive has serious formaldehyde hazards, pollutes the surrounding environment, and harms the body. Although there is non-polluting starch glue instead of trialdehyde glue, this kind of adhesive is aldehyde-free adhesive and has no pollution to the environment, but starch adhesive has the disadvantages of low bonding strength and poor water resistance, so it cannot be used. Used for the bonding of multi-layer boards in bamboo laminate flooring, currently only for the bonding of envelopes, paper and labels. Contents of the invention [0003] The technical problem to be solved and the technical task proposed by the present inventi...
Claims
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IPC IPC(8): C09J103/04C09J103/06C08B31/04C08B31/00
Inventor 方庆华
Owner ZHEJIANG TIANZHEN BIOLOGICAL ADHESIVE TECH