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Biological adhesive for plywood and preparation method thereof

An adhesive and plywood technology, applied in the preparation of adhesives, animal glue or gelatin, adhesive types, etc., can solve the problems of poor water resistance, bacteria-prone mildew, hard adhesive layer, etc., to reduce production costs and product quality. Stabilizing and improving water resistance

Active Publication Date: 2012-10-24
赵晓斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, when the biological adhesive based on animal blood is used for wood-based panels, the cured adhesive layer is relatively hard, has poor water resistance, has a special odor and is prone to mold and mildew
Although some people tried to overcome these shortcomings by adding some preservatives and reinforcing agents, the effect was not good, which affected the popularization and application of bio-adhesives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The specific operation is as follows:

[0021] ①In the reactor, first add 10kg of animal blood protein granules, then add 1kg of amino compound ammonia water and 1kg of epichlorohydrin, stir, and use flake sodium hydroxide to adjust the pH of the material in the reactor to 10 ~11, after heating and reacting for 4 hours under stirring, cool to room temperature, wherein the weight ratio of animal blood protein particles: amino compound: epichlorohydrin is 10:1:1, and the above stirring speed is controlled at 300~500rpm;

[0022] The preparation method of the animal blood protein granules in the step ① is to add 100 kg of fresh pig blood into the container, steam and cook for 30 minutes under stirring, then transfer to an industrial centrifuge filter bag for centrifugal dehydration to obtain a solid content of 45 kg It is 70wt% animal blood clot, which is prepared by stirring and crushing the animal blood clot, the particle size of which is ≥50 mesh, and the stirring speed...

Embodiment 2

[0025] The specific operation is as follows:

[0026] ①In the reaction kettle, first add 10kg of animal blood protein granules, then add 0.5kg of amino compound dimethylamine, 0.5kg of diethylenetriamine and 1kg of epichlorohydrin, stir, and use flake sodium hydroxide to dissolve The material in the reaction kettle is adjusted to a pH of 10-11, heated and reacted for 4 hours under stirring, and then cooled to room temperature, wherein, the weight ratio of animal blood protein particles: amino-containing compound: epichlorohydrin is 10: 1: 1, and the above-mentioned stirring The speed is controlled at 300~500rpm;

[0027] The preparation method of the animal blood protein granules in the step ① is to add 100 kg of fresh bovine blood into the container, stir and steam for 30 minutes, then transfer to an industrial centrifuge filter bag for centrifugal dehydration to obtain a solid content of 45 kg It is 70wt% animal blood clot, which is prepared by stirring and crushing the ani...

Embodiment 3

[0030] The specific operation is as follows:

[0031] ①In the reaction kettle, first add 0.5kg of amino compound triethylenetetramine, 0.5kg of diethylenetriamine and 1kg of epichlorohydrin, and then use flake sodium hydroxide to adjust the pH of the materials in the reaction kettle to 10-11, heat to 50°C under stirring for 4 hours, then add 10 kg of animal blood protein particles, continue to stir for 4 hours, then cool to room temperature, wherein, the weight ratio of animal blood protein particles: amino compounds: epichlorohydrin 10:1:1, the stirring speed is controlled at 300~500rpm;

[0032] The preparation method of the animal blood protein granules in the step ① is to add 100 kg of fresh chicken blood into the container, stir and steam for 30 minutes, then transfer to an industrial centrifuge filter bag for centrifugal dehydration to obtain a solid content of 45 kg It is 70wt% animal blood clot, which is prepared by stirring and crushing the animal blood clot, the par...

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Abstract

The invention relates to a biological adhesive for plywood and a preparation method thereof. The adhesive is a product obtained by chemically modifying animal blood protein grains with an amino compound and epoxy chloropropane, and the weight ratio of animal blood protein grains to amino compound to epoxy chloropropane is 10:1-5:1-5, wherein the animal blood protein grains are prepared from fresh animal blood, the grain size is greater than or equal to 50 meshes, and the solid content is 60-95 wt%; the amino compound is one or more than one of ammonia water, dimethylamine, diethylenetriamine, triethylenetetramine, polyvinylamine, polyethyleneimine and polyketoamine; and the fresh animal blood is blood of pigs, cows, sheep, chickens or ducks. The preparation method comprises the following steps of: chemically modifying the animal blood protein grains with the amino compound and epoxy chloropropane, and diluting the product to obtain the biological adhesive. The obtained adhesive reaches the bonding strength of No. I adhesives, the water resistance of an adhesive layer is increased, and the adhesive does not contain formaldehyde and has low cost and industrial popularization value.

Description

technical field [0001] The invention relates to a plywood biological adhesive and a preparation method thereof. Background technique [0002] Wood-based panels mainly include four categories: plywood, particleboard, blockboard and fiberboard, among which plywood is the leading product of my country's wood-based panels. At present, except that the building templates in plywood are made by pressing phenolic glue, others are made by pressing urea-formaldehyde glue or melamine-modified urea-formaldehyde glue. These wood-based panel adhesives all contain formaldehyde. Studies have shown that the formaldehyde release period of wood products made of formaldehyde-containing adhesives used indoors can be as long as 15 years. The lot of documents record, formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction to health effects. Therefore, living in this environment for a long time ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00
Inventor 赵晓斌
Owner 赵晓斌
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