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Preparation method of environment-friendly water-resisting composite boards

A composite board and composite board technology, applied in the direction of chemical instruments and methods, manufacturing tools, inorganic adhesives, etc., can solve the problems of low heat resistance temperature, unsuitable plane bonding, unusable bonding, etc., to achieve water absorption expansion The coefficient is small, the modification effect is remarkable, and the effect of easy operation and construction

Inactive Publication Date: 2013-05-15
韩敏杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphate-based inorganic adhesives are too brittle, and the heat-resistant temperature is not high (about 900°C), so they are not suitable for plane bonding; while silicate-based inorganic adhesives have the lowest cost, the simplest operation process, and the largest amount of industrial use, so they are suitable for silicate-based inorganic adhesives. The research on the modification of adhesives has very important social value and practical significance. Most silicate-based inorganic adhesives use water-soluble alkali metal silicates as adhesives. Although the plane bonding strength and heat resistance have been improved, but Water resistance is poor, so it cannot be used for bonding in high humidity environment

Method used

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  • Preparation method of environment-friendly water-resisting composite boards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Environmentally friendly and water-resistant adhesives used in the preparation of composite panels:

[0027] 1) Grind quartz sand and silicon carbide into powder, pass through a 200-mesh sieve for later use;

[0028] 2) Weigh 20 parts by weight of acetone, then add 16 parts by weight of cellulose acetate into it, stir thoroughly for 15 minutes to make a cellulose acetate solution, and seal it for later use;

[0029] 3) Add 1 part by weight of dimethylolpropionic acid, 1 part by weight of dihydroxyphenylpropionic acid and 5 parts by weight of N,N-dimethylformamide into a 250ml round bottom flask protected by dry nitrogen, fully Stir for 10 minutes, add 3 parts by weight of toluene diisocyanate, 1 part by weight of hexamethylene-1,6 diisocyanate and 0.06 parts by weight of dibutyltin dilaurate, stir and react at 75-100°C for 60 minutes, reduce The solvent is removed by pressure distillation to obtain a polyurethane prepolymer;

[0030] 4) Add the polyurethane prepoly...

Embodiment 2

[0037] 1) Environmentally friendly and water-resistant adhesives used in the preparation of composite panels:

[0038] 1) Grind quartz sand and silicon carbide into powder, pass through a 200-mesh sieve for later use;

[0039] 2) Weigh 25 parts by weight of acetone, then add 20 parts by weight of cellulose acetate, stir thoroughly for 30 minutes to make a cellulose acetate solution, and seal it for later use;

[0040] 3) Add 1 part by weight of dimethylolpropionic acid, 2 parts by weight of dihydroxyphenylpropionic acid and 6 parts by weight of N,N-dimethylformamide into a 250ml round bottom flask protected by dry nitrogen, fully Stir for 15 minutes, add 5 parts by weight of toluene diisocyanate, 2 parts by weight of hexamethylene-1,6 diisocyanate and 0.08 parts by weight of dibutyltin dilaurate, stir and react at 80°C for 100 minutes, and distill under reduced pressure Remove the solvent to obtain a polyurethane prepolymer;

[0041] 4) Add the polyurethane prepolymer prepar...

Embodiment 3

[0048] 1) Grind quartz sand and silicon carbide into powder, pass through a 200-mesh sieve for later use;

[0049] 2) Weigh 30 parts by weight of acetone, then add 24 parts by weight of cellulose acetate into it, stir thoroughly for 45 minutes to make a cellulose acetate solution, and seal it for later use;

[0050] 3) Add 2 parts by weight of dimethylolpropionic acid, 3 parts by weight of dihydroxyphenylpropionic acid and 8 parts by weight of N,N-dimethylformamide into a 250ml round bottom flask protected by dry nitrogen, fully Stir for 20 minutes, add 6 parts by weight of toluene diisocyanate, 3 parts by weight of hexamethylene-1,6 diisocyanate and 0.09 parts by weight of dibutyltin dilaurate, stir and react at 100°C for 180 minutes, and distill under reduced pressure Remove the solvent to obtain a polyurethane prepolymer;

[0051] 4) Add the polyurethane prepolymer prepared in step 3) to an organic amine solution prepared by 5 parts by weight of dipropylamine and 48 parts ...

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Abstract

The invention relates to a preparation method of environment-friendly water-resisting composite boards. The preparation method includes the following steps: (1) preparing environment-friendly water-resisting inorganic adhesive which is formed through specific combination, (2) preparing composite boards: taking wood-based boards in proper sizes, respectively coating the modified silicate inorganic adhesive prepared through the step (1) on two faces of the wood-based boards, gluing bamboo pieces on the surfaces of the wood-based boards, maintaining for a certain time in a drying oven, taking out samples, and then obtaining the environment-friendly water-resisting composite boards. The composite boards through the method have the advantages of being high in strength, good in water-resisting performance, non-poisonous and harmless, and green and environment-friendly.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly and water-resistant composite board, in particular to a preparation method of a green and environment-friendly composite board with high strength, good water resistance, non-toxic and harmless. [0002] Background technique [0003] my country has become a major producer of wood-based panels in the world, and the annual consumption of wood adhesives has exceeded 4 million tons. In the 1990s, my country's adhesive industry entered a new stage of rapid development. It is estimated that by 2015, that is, at the end of the "Twelfth Five-Year Plan", my country's adhesive output will exceed the 6 million tons mark. The adhesive industry is China's self-implemented reform One of the fastest-growing fine chemical industries since the opening policy. Adhesives are easy to use and have good economic benefits, providing an effective way for various industries to simplify processes, save ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08B32B37/12C09J1/02
Inventor 韩敏杰
Owner 韩敏杰
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