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Environment-friendly plywood adhesive

A plywood and adhesive technology, applied in the direction of starch adhesives, adhesive additives, polymer adhesive additives, etc., can solve problems such as endangering human health, achieve low prices, good production environment, and environmental protection.

Inactive Publication Date: 2019-01-18
TIANE COUNTY PINGCHANG ECOLOGICAL AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plywood made of this type of adhesive will release formaldehyde during storage and use, endangering human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An environment-friendly plywood adhesive contains material components in parts by weight, including 50 parts of starch, 8 parts of isocyanate, 1 part of polyvinyl alcohol and 10 parts of palm oil.

[0016] Its preparation method:

[0017] (1) Take a certain amount of starch and 0.5mol / L HCl solution to prepare a starch emulsion, heat it up to 45°C and keep it warm;

[0018] (2) Add 10% initiator solution to the starch emulsion, add polyvinyl alcohol with a starch mass of 35% after pre-initiation for 25 minutes, and adjust the pH to 4.2 with NaOH solution to obtain primary acid-hydrolyzed oxidized starch;

[0019] (3) Add a certain amount of isocyanate in batches within 40 min, carry out the graft copolymerization reaction for 1.5 h, then add 10% initiator solution, and continue the reaction for 1.5 h to obtain a composite modified starch emulsion;

[0020] (4) Slowly add a certain mass of pyrolyzed palm oil into the reaction system, react for 30 minutes, and cool down ...

Embodiment 2

[0022] An environment-friendly plywood adhesive contains material components in parts by weight, including 100 parts of starch, 15 parts of isocyanate, 3 parts of polyvinyl alcohol and 20 parts of palm oil.

[0023] Its preparation process is as described in Example 1.

Embodiment 3

[0025] An environment-friendly plywood adhesive contains material components in parts by weight, including 80 parts of starch, 11 parts of isocyanate, 2 parts of polyvinyl alcohol and 15 parts of palm oil.

[0026] Its preparation process is as described in Example 1.

[0027] The performance of the adhesive obtained in Examples 1-3 of the present invention is measured, the storage period of the adhesive in Examples 1-3 is all greater than 20 days, the viscosity is greater than 850mPs s, and the adhesive strength is greater than 1.50MPa, which is better than that of the national standard.

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PUM

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Abstract

The invention relates to the technical field of wood processing, in particular to an environment-friendly plywood adhesive. The environment-friendly plywood adhesive comprises the following raw materials in parts by weight: 50-100 parts of starch, 8-15 parts of isocyanate, 1-3 parts of polyvinyl alcohol and 10-20 parts of palm oil. The environment-friendly adhesive do not contain any aldehyde-containing chemical substance, so that the detected aldehyde release amount is zero, and the environment-friendly adhesive is an aldehyde-free environment-friendly adhesive; the starch is used as a main raw material of the plywood adhesive, so that the environment-friendly adhesive is a pure natural, non-toxic and harmless renewable resource, is relatively low in price, is biodegradable and is conducive to environmental protection.

Description

technical field [0001] The invention relates to the technical field of wood processing, in particular to an environment-friendly plywood adhesive. Background technique [0002] As one of the most common decoration and building materials, plywood is widely used in the market. With the improvement of people's living standards, people have put forward higher requirements for the decoration of their residences, offices, activities and other places, not only requiring beautiful, trendy, natural and concise, but also requiring health and environmental protection. [0003] my country's plywood industry has developed rapidly, and the total output in 2011 has reached 98.6963 million m 3 , an increase of 38.24% over 2010, widely used in construction and decoration, packaging, and the manufacture of automobiles and sports and cultural goods. However, the adhesives used in my country's wood industry are still dominated by "trialdehyde glue", especially the largest amount of urea-forma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/02C09J11/06C09J11/08
CPCC08L2201/06C08L2205/03C09J11/06C09J11/08C09J103/02C08L29/04C08L91/00C08K5/29
Inventor 张宗斌
Owner TIANE COUNTY PINGCHANG ECOLOGICAL AGRI
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