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Environment-friendly, high-viscosity and weather-resistant modified starch adhesive and preparation method thereof

A starch adhesive, high viscosity technology, applied in the direction of starch derived adhesives, polymer adhesive additives, adhesive types, etc., can solve mildew adhesive ability, unsuitable for large-scale industrial application, weather resistance Poor problems, to achieve the effect of prolonging the storage time

Inactive Publication Date: 2019-12-10
永发印务(东莞)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional adhesives are mainly based on resins and organic solvents. During production, use, and subsequent drying processes, volatile solvents harmful to the human body will be produced, as well as formaldehyde. Therefore, they are gradually replaced by water-based adhesives. Although organic solvent-based adhesives are more environmentally friendly than traditional organic solvent-based adhesives, their main components are still various resins and emulsions, which are not truly green and environmentally friendly, and are non-renewable. At the same time, their solvent is water. It is easy to open the glue in a high humidity environment, which will affect the product quality
Since starch is one of the main food crops in our country, it has abundant resources, wide sources, natural green environmental protection and renewable, most of the existing adhesives use starch as the main linking material, the starch is heated and swelled to obtain gelatinized starch, and this kind The gelatinized starch obtained by the method contains a large amount of hydrogen bonds, so that the system has poor fluidity, high viscosity, easy caking, short storage time, and poor adhesive force, which is not suitable for large-scale industrial applications. Poor plasticizing effect, etc., and the formaldehyde-free adhesive prepared from this starch is often used to bond cardboard, wood, etc. It can be used under harsh conditions such as high and low temperature, high and low temperature cycle impact, but the weather resistance of traditional starch adhesives is poor and cannot meet the requirements of these harsh conditions

Method used

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  • Environment-friendly, high-viscosity and weather-resistant modified starch adhesive and preparation method thereof
  • Environment-friendly, high-viscosity and weather-resistant modified starch adhesive and preparation method thereof
  • Environment-friendly, high-viscosity and weather-resistant modified starch adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides an environmentally friendly high-viscosity weather-resistant modified starch adhesive, which includes the following components in parts by weight:

[0047]

[0048] Among them, the carboxylic acid crosslinking agent is a dibasic carboxylic acid, i.e. food-grade adipic acid, the mass fraction of hydrogen peroxide is 29%, the degree of polymerization of polyvinyl alcohol is 1700, and the auxiliary agents are potassium pyrophosphate, Dow Corning DC-67, butyl The mixture of alcohol and Dow Corning DC-65 silicone defoamer, the mass ratio of the four is 1:1:1:1, the pH regulator is 2% sodium hydroxide solution in mass fraction, and the pasting agent is The mass fraction is 30% sodium hydroxide solution, and the pH regulator and pasting agent are both prepared from analytically pure sodium hydroxide and third-grade water.

[0049] Its preparation method comprises the following steps:

[0050] S1. Mixing: Put the three-necked bottle in a constant temp...

Embodiment 2

[0057] This embodiment provides an environmentally friendly high-viscosity weather-resistant modified starch adhesive, which includes the following components in parts by weight:

[0058]

[0059] Among them, the carboxylic acid crosslinking agent is polycarboxylic acid, the mass fraction of hydrogen peroxide is 30%, the degree of polymerization of polyvinyl alcohol is 1750, and the auxiliary agents are potassium pyrophosphate, Dow Corning DC-67, phenol and Dow Corning DC-65 silicone disinfectant. A mixture of foaming agents, the mass ratio of the four is 2:5:5:5, the pH regulator is 2% sodium hydroxide solution, and the pasting agent is 30% sodium hydroxide The solution, the pH regulator and the pasting agent are all prepared from analytically pure sodium hydroxide and tertiary water.

[0060] Its preparation method comprises the following steps:

[0061] S1. Mixing: Put the three-necked bottle in a constant temperature water bath at 60°C, add third-grade water into the t...

Embodiment 3

[0068] This embodiment provides an environmentally friendly high-viscosity weather-resistant modified starch adhesive, which includes the following components in parts by weight:

[0069]

[0070] Among them, the carboxylic acid crosslinking agent is food-grade adipic acid, the mass fraction of hydrogen peroxide is 30%, the degree of polymerization of polyvinyl alcohol is 1750, and the auxiliary agents are potassium pyrophosphate, Dow Corning DC-67, butanol and Dow Corning DC-65 silicon A mixture of ketone defoamers, the mass ratio of the four is 2:5:5:5, the pH regulator is 2% sodium hydroxide solution, and the pasting agent is 30% hydrogen The sodium oxide solution, the pH regulator and the pasting agent are all prepared from analytically pure sodium hydroxide and tertiary water.

[0071] Its preparation method comprises the following steps:

[0072] S1. Mixing: Put the three-necked bottle in a constant temperature water bath at 60°C, add third-grade water into the three...

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Abstract

The invention discloses an environment-friendly, high-viscosity and weather-resistant modified starch adhesive and a preparation method thereof.The environmentally friendly, high-viscosity and weather-resistant modified starch adhesive is prepared from the following components in parts by weight: 20 to 30 parts of soluble starch, 50 to 70 parts of tertiary water; 0.1 to 1 part of vinyl alcohol, 1to 10 parts of a PH regulator, 1 to 5 parts of a gelatinizer, 2 to 8 parts of hydrogen peroxide, 0.1 to 1 part of a carboxylic acid crosslinking agent, 0.5 to 2 parts of borax and 0.1 to 5 parts of anadditives. According to the environmentally friendly, high-viscosity and weather-resistant modified starch adhesive, the polyvinyl alcohol, the starch and the tertiary water are mixed, then the hydrogen peroxide is added in an alkaline environment for oxidization to destroy the hydrogen bond of the starch for modification, the carboxylic acid crosslinking agent is added to form a stable network structure,and then gelatinization, complexationand dispersion are conducted to prepare the environment-friendly and highly-viscosity modified starch adhesive with the abilities to withstand high temperature and high humidity, low temperature and high and low temperature cycling impact.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to an environment-friendly, high-viscosity and weather-resistant modified starch adhesive and a preparation method thereof. Background technique [0002] Traditional adhesives are mainly based on resins and organic solvents. During production, use, and subsequent drying processes, volatile solvents harmful to the human body will be produced, as well as formaldehyde. Therefore, they are gradually replaced by water-based adhesives. Although organic solvent-based adhesives are more environmentally friendly than traditional organic solvent-based adhesives, their main components are still various resins and emulsions, which are not truly green and environmentally friendly, and are non-renewable. At the same time, their solvent is water. It is easy to open the glue in a high humidity environment, which will affect the product quality. Since starch is one of the main food cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/10C09J11/08C08B31/18
CPCC08B31/18C08B31/185C08L2201/08C08L2312/00C09J11/08C09J103/10C08L29/04
Inventor 张朝忠武军沈荣波杨伟栋陈倩沈海生刘时波
Owner 永发印务(东莞)有限公司
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