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Non-toxic adhesive and preparation method thereof

A technology of adhesives and formulations, applied in the direction of adhesive additives, adhesive types, dextran adhesives, etc., can solve the problems of poor water resistance and low bonding strength, and achieve high water resistance and high bonding strength Strong, non-toxic and harmless effect with less pollution

Inactive Publication Date: 2013-04-03
SHANDONG TAIDE NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, natural high molecular polymers, such as soybean protein, are also used as wood adhesives, but the boards glued with this type of adhesive generally have disadvantages such as low bonding strength and poor water resistance.

Method used

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Embodiment 1

[0014] A non-toxic adhesive, the raw material formula is composed of main agent and auxiliary agent, the main agent is composed of the following components: 80g konjac powder, 10g chitosan, 50g polyvinyl alcohol; auxiliary agent includes sodium hydroxide, borax, phosphoric acid , nano-kaolin, urea and defoamer, wherein nano-kaolin is 1.5g, borax is 2.0g, and urea is 2.5g.

[0015] The preparation method of described nontoxic adhesive comprises the following steps:

[0016] (1) First dissolve 50g of polyvinyl alcohol in water, after the polyvinyl alcohol is completely dissolved, add phosphoric acid to adjust the pH value of the polyvinyl alcohol aqueous solution to 5, then heat to 80°C, stir for 25 minutes, then add phosphoric acid to adjust the pH value to 2.5, continue to heat up to 90°C, and react for 30 minutes, then cool down to 60°C; add 2.5g of urea and 2.0g of borax, stir well, add sodium hydroxide to adjust the pH to 9, and finally add 10g of shell The polysacchari...

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Abstract

The invention relates to a non-toxic adhesive and a preparation method thereof. For the non-toxic adhesive, the formula of raw materials consists of a main agent and additives, wherein the main agent comprises following components: konjac powder, chitosan and polyvinyl alcohol; and the additives comprise sodium hydroxide, borax, phosphoric acid, nano-kaolin, urea and a degassing agent. The preparation method of the non-toxic adhesive comprises following steps: (1) firstly, dissolving polyvinyl alcohol in water, adding urea and borax, and finally adding chitosan and stirring until chitosan is completely dissolved to obtain a component A; (2) adding konjac powder to a sodium hydroxide solution and stirring until konjac powder is completely dissolved to obtain a component B; and (3) mixing and uniformly stirring the component A, the component B, the degassing agent and nano-kaolin to obtain the non-toxic adhesive. The non-toxic adhesive is environment-friendly and safe, high in bonding strength and good in water resistance; and the preparation method of the non-toxic adhesive is also simple and easy to operate.

Description

technical field [0001] The invention relates to a nontoxic adhesive and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, the adhesive industry has also developed by leaps and bounds, providing many new types of rubber for the society, but also bringing new pollution problems to the environment. [0003] There are many volatile organic compounds (VOC) in existing adhesives, such as organic solvents in solvent-based adhesives. Most of these organic solvents are toxic and harmful. For example, some halogenated hydrocarbon solvents are substances that destroy the ozone layer of the atmosphere. ; Aromatic hydrocarbon solvents are highly toxic and even carcinogenic. Currently the most commonly used phenolic, urea-formaldehyde, and melamine-formaldehyde adhesives have excellent performance and a wide range of applications, but they contain free formaldehyde; another example is the styrene contained in unsaturated pol...

Claims

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Application Information

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IPC IPC(8): C09J105/02C09J105/08C09J129/04C09J11/04
Inventor 张成如李丹丹阚红静
Owner SHANDONG TAIDE NEW ENERGY
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