Environmentally-friendly adhesive

An adhesive and environmentally friendly technology, applied in the direction of adhesive types, starch adhesives, non-polymer adhesive additives, etc., can solve the problems of low bonding strength of starch adhesives, achieve low cost, improve cohesive strength, cost reduction effect

Inactive Publication Date: 2018-08-14
CHENGDU KECHUANGCHENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the problem of low bonding strength of starch adhesives, the present invention provides an environmentally friendly adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides an environmentally friendly adhesive, which is made of the following raw materials, in parts by weight, the raw materials include 20 parts of starch, 100 parts of water, 1 part of 1mol / L hydrochloric acid, 0.04 parts of 0.1% potassium permanganate, sodium hypochlorite 2 parts, 1 part of 4% sodium hydroxide solution, 1 part of crosslinking agent.

[0029] The starch is wheat starch.

[0030] The crosslinking agent includes inorganic crosslinking agent and organic crosslinking agent.

[0031] The inorganic crosslinking agent is sodium trimetaphosphate.

[0032] The organic crosslinking agent is epichlorohydrin.

[0033] The water is deionized water.

[0034] Described environment-friendly adhesive is prepared according to the following steps:

[0035] 1) Weigh the starch and add it to water, heat up to 50°C in a water bath while stirring, add 1mol / L hydrochloric acid dropwise, and stir evenly;

[0036] 2) Add 0.1% potassium permanganate, reac...

Embodiment 2

[0041] This embodiment provides an environmentally friendly adhesive, which is made of the following raw materials. In parts by weight, the raw materials include 30 parts of starch, 150 parts of water, 10 parts of 1mol / L hydrochloric acid, 0.06 parts of 0.1% potassium permanganate, sodium hypochlorite 4 parts, 10 parts of 4% sodium hydroxide solution, 2 parts of cross-linking agent.

[0042] The starch is corn starch.

[0043] The crosslinking agent includes inorganic crosslinking agent and organic crosslinking agent.

[0044] The inorganic crosslinking agent is borax.

[0045] The organic crosslinking agent is tetraisocyanate.

[0046] The water is deionized water.

[0047] Described environment-friendly adhesive is prepared according to the following steps:

[0048] 1) Weigh the starch and add it to water, heat up to 60°C in a water bath while stirring, add 1mol / L hydrochloric acid dropwise, and stir evenly;

[0049] 2) Add 0.1% potassium permanganate, react for 15 minu...

Embodiment 3

[0054] This embodiment provides an environmentally friendly adhesive, which is made of the following raw materials, in parts by weight, the raw materials include 25 parts of starch, 120 parts of water, 5 parts of 1mol / L hydrochloric acid, 0.05 parts of 0.1% potassium permanganate, sodium hypochlorite 3 parts, 5 parts of 4% sodium hydroxide solution, 1.6 parts of crosslinking agent.

[0055] The starch is wheat starch.

[0056] The crosslinking agent includes inorganic crosslinking agent and organic crosslinking agent.

[0057] The inorganic crosslinking agent is borax and phosphorus oxychloride.

[0058] The organic crosslinking agent is epichlorohydrin.

[0059] The water is deionized water.

[0060] Described environment-friendly adhesive is prepared according to the following steps:

[0061] 1) Weigh the starch and add it to water, heat up to 55°C in a water bath while stirring, add 1mol / L hydrochloric acid dropwise, and stir evenly;

[0062] 2) Add 0.1% potassium perm...

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PUM

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Abstract

The invention discloses an environmentally-friendly adhesive, and relates to the technical field of adhesives. The problem of low adhesive strength of starch adhesives is solved. The adhesive is prepared from, by weight, 20-30 parts of starch, 100-150 parts of water, 1-10 parts of 1 mol / L hydrochloric acid, 0.04-0.06 part of 0.1% potassium permanganate, 2-4 parts of sodium hypochlorite, 1-10 partsof a 4% sodium hydroxide solution and 1-2 parts of a cross-linking agent. A preparation method of the environmentally-friendly adhesive comprises the following steps: 1) weighing the starch, adding the starch into the water, performing water bath heating to 50-60 DEG C while stirring, dropwise adding the 1 mol / L hydrochloric acid, and performing uniform stirring; 2) adding the 0.1% potassium permanganate, performing a reaction for 10-15 min, adding the sodium hypochlorite, and performing a reaction for 10-20 min; 3) rising the temperature to 60-70 DEG C, adding the 4% sodium hydroxide solution to adjust the pH value to 12-13.5, and performing a reaction for 45-90 min; and 4) adding the cross-linking agent, performing uniform stirring, adding a pH adjuster to adjust the pH value to 10-12,and performing stirring and reacting for 45-90 min to obtain the environmentally-friendly adhesive. The environmentally-friendly adhesive has the advantages of non-toxicity, environmental protection,low cost, high bonding strength, and meeting of plate production process requirements.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to an environmentally friendly adhesive. Background technique [0002] At present, my country's adhesives mainly use formaldehyde as the main raw material for production, namely urea-formaldehyde resin glue, phenolic resin glue and melamine-formaldehyde resin glue. Among them, urea-formaldehyde resin glue is a kind of thermosetting polymer adhesive developed earlier. Because of its simple process, cheap raw materials, high bonding strength, colorless and transparent, etc., it is widely used in plywood, particleboard, medium density fiberboard, and wood-based panels. production and interior decoration industries. However, due to its high content of free formaldehyde, it will bring great harm to the environment and human health. The main hazard of formaldehyde is the stimulation of the skin and mucous membranes. When formaldehyde reaches a certain concentration indoors, people wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/02C09J11/04C09J11/06
CPCC09J103/02C08K3/32C08K5/1515C08K5/29C08K2003/387C09J11/04C09J11/06
Inventor 雍海燕
Owner CHENGDU KECHUANGCHENG TECH
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