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Glulam glue and preparation method thereof

A technology of splicing glue and laminated material, applied in the direction of adhesive, monocarboxylate copolymer adhesive, adhesive type, etc., can solve the problem of insufficient strength, avoid cracking, prolong service life, improve The effect of bond strength

Active Publication Date: 2018-07-13
北京市创新玮地科贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are very few structural adhesives for glulam splicing in the domestic market that can meet the above-mentioned standards, and the wet strength index of water boiling resistance just exceeds the standard index, and it cannot reach the strength of broken wood.

Method used

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  • Glulam glue and preparation method thereof

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the above-mentioned glulam glue, the specific steps are as follows:

[0029] S1 Add 15% to 25% deionized water and polyvinyl alcohol in proportion to the reaction kettle and heat up to completely dissolve, then add a chelating agent to react for 1.5 hours and cool to obtain a modified polyvinyl alcohol solution for later use;

[0030] S2 Add the water-based emulsion, plasticizer, dispersant, and defoamer to the dispersing kettle in sequence, slowly add calcium carbonate, and disperse to a uniform mucilage, then add the modified polyvinyl alcohol solution prepared in step S1, bactericide, 0.4 %~2.7% deionized water is added to the dispersing tank and stirred evenly to obtain the finished product;

[0031] S3 Mix components A and B evenly.

[0032] It should be noted that component A and component B are uniformly mixed at a mass ratio of 100:15.

Embodiment 1

[0034] 1. Preparation of component A

[0035] Put 15.0g of deionized water into the reaction flask, put in 2.0g of polyvinyl alcohol 2088 and raise the temperature to 85°C for 1 hour, add 0.1g of titanate coupling agent, react for 1.5h and cool down to obtain a modified polyvinyl alcohol solution. stand-by;

[0036] Then 42.0g ethylene-vinyl acetate copolymer emulsion (VAE emulsion), 21.0g ethylene-vinyl acetate-vinyl chloride copolymer emulsion (chlorine vinegar emulsion), 1.0g carboxylated styrene-butadiene latex, 0.1g dispersant, 0.05g defoamer Add to the dispersing tank, slowly add 16.0g of calcium carbonate under stirring, stir for 1 hour to disperse to a uniform slurry, then slowly add the prefabricated modified polyvinyl alcohol solution, 0.05g of bactericide, and 2.7g of deionized water into the dispersing tank in sequence Stir well to get A component.

[0037] 2. Mix components A and B with a mass ratio of 100:15.

Embodiment 2

[0039] 1. Preparation of component A

[0040] Put 20.0 g of deionized water into the reaction flask, put in 3.0 g of polyvinyl alcohol 2088 and raise the temperature to 85° C. for 1 hour. Add 0.15g titanate coupling agent, react for 1.5h and cool down for later use;

[0041] Then 34.0g ethylene-vinyl acetate copolymer emulsion (VAE emulsion), 17.0g ethylene-vinyl acetate-vinyl chloride copolymer emulsion (chlorine vinegar emulsion), 2.5g carboxylated styrene-butadiene latex, 0.15g dispersant, 0.05g defoamer Add to the dispersing tank, slowly add 21.0g of calcium carbonate under stirring, stir for 1 hour to disperse to a uniform slurry, then slowly add the prefabricated modified polyvinyl alcohol solution, 0.05g of bactericide, and 2.1g of deionized water into the dispersing tank in sequence Stir evenly to obtain component A.

[0042] 2. Mix components A and B with a mass ratio of 100:15.

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Abstract

The invention discloses laminated material laminating glue and a preparation method thereof. The laminated material laminating glue comprises components A and B. The component A comprises, by mass, 17.7% to 25.4% of deionized water, 39% to 63% of a water-based emulsion, 1% to 5% of a plasticizer, 2% to 4% of polyvinyl alcohol, 0.1% to 0.2% of a chelating agent, 0.1% to 0.2 % of a dispersant, 0.05% to 0.1% of a defoamer, 16% to 26% of calcium carbonate and 0.05% to 0.1% of a bactericide. The component B comprises polyaryl polymethylene isocyanate. The preparation method comprises preparing a modified polyvinyl alcohol solution from deionized water, polyvinyl alcohol and the chelating agent, orderly adding the water-based emulsion, the plasticizer, the dispersant and the defoamer into a dispersion kettle, slowly adding calcium carbonate into the dispersion kettle, carrying out dispersion to obtain uniform glue slurry, adding a polyvinyl alcohol modification solution and a bactericide into the glue slurry to obtain the component A and mixing the component A and the component B. The laminated material laminating glue is used for splicing of various laminated materials, has high splicing strength, a long application period, excellent heat resistance and excellent water resistance, resists water boiling and can reach the wood breaking strength.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a glulam glue and a preparation method thereof. Background technique [0002] At present, in order to save forest resources, domestic and foreign countries use small materials to make great use of inferior materials, and retain their natural wood texture and beautiful appearance. Used to replace large-scale solid wood. At present, the adhesives used for glued wood splicing are mainly water-based polymer-isocyanate adhesives, but with the increase in the use of glued materials, hard The splicing of solid wood requires that the glued wood has sufficient gluing performance and durability, and it needs to be superior to solid wood in terms of physical and mechanical properties such as tensile and compressive properties and uniformity of material quality, especially in terms of water resistance. It must reach LY / T1601 -2011 standard requirements. Currently, only a few...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J123/08C09J131/04C09J11/08C09J11/04C09J11/06
CPCC08L2205/035C09J11/04C09J11/06C09J11/08C09J123/0853C09J131/04C08L23/0892C08L13/02C08L29/04C08K5/10C08K2003/265
Inventor 关爱君李丁丁
Owner 北京市创新玮地科贸有限公司
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