A kind of high-strength environmental protection wood board adhesive and preparation method thereof

An adhesive and high-strength technology, applied in the direction of polymer adhesive additives, non-polymer adhesive additives, adhesive types, etc., can solve problems such as low VOC content, human health hazards, air pollution, etc. Achieve the effects of less side reactions, increased hard segment content, and simple operation

Active Publication Date: 2022-07-12
广东龙马新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional plywood industry, most of them use UF glue (urea-formaldehyde resin) to add a certain amount of starch to thicken and put it into production, but because it will volatilize and produce formaldehyde, pollute the air, and cause hidden dangers to human health, so its application is limited.
[0003] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain, which have the characteristics of low VOC content, low or no environmental pollution, and non-combustibility. At the same time, it has excellent shear strength and impact resistance properties. At the same time, the performance of polyurethane adhesives is often further improved through the use of reinforcing components. Among them, polyimide as an additive has excellent thermal stability, mechanical properties, Solvent resistance, etc., but because of the above stability, it is difficult to dissolve and process, so it is not easy to introduce it into the polyurethane system for performance enhancement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-strength environment-friendly wood board adhesive is prepared from the following raw materials by weight: 40 parts of hexamethylene diisocyanate, 10 parts of hydroxyl terminated ethylene oxide-tetrahydrofuran copolyether, 7.5 parts of modified polyimide, 75 parts of fluorinated polyether glycol, 1.3 parts of dibutyltin dilaurate, 0.4 part of boron trifluoride triethanolamine complex, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid 0.2 part of n-octadecyl alcohol ester and 0.2 part of antioxidant.

[0026] The modified polyimide is prepared by the following steps:

[0027] (1) Mix 49 parts of N,N-dimethylacetamide and 6.5 parts of 3,3',4,4'-biphenyltetracarboxylic dianhydride, stir under nitrogen for 8 minutes, and then add 1.5 parts of 2, 4,6-triaminopyrimidine was stirred for 36 hours;

[0028] (2) The obtained solution was heated to 155° C., and xylene and water were added to azeotrope to remove the generated water. After cooling, the solution was washed ...

Embodiment 2

[0034] A high-strength environment-friendly wood board adhesive is prepared from the following raw materials in parts by weight: 30 parts of 4,4'-diphenylmethane diisocyanate, 5 parts of hydroxyl-terminated ethylene oxide-tetrahydrofuran copolyether, modified polyamide 5 parts of imine, 60 parts of fluorine-containing polyether glycol, 0.5 part of dibutyltin dilaurate, 0.2 part of boron trifluoride triethanolamine complex, β-(3,5-di-tert-butyl-4-hydroxyl 0.1 part of isooctyl phenyl) propionate and 0.1 part of antioxidant.

[0035] The modified polyimide is prepared by the following steps:

[0036] (1) Mix 47 parts of N,N-dimethylacetamide and 6 parts of 3,3',4,4'-biphenyltetracarboxylic dianhydride, stir under nitrogen for 5 minutes, and then add 1 part of 2, 4,6-triaminopyrimidine was stirred for 24 hours;

[0037] (2) heating the obtained solution to 150°C, adding xylene and water azeotropically to remove the water produced, after cooling, washing the solution with ethanol...

Embodiment 3

[0043] A high-strength environmentally friendly wood board adhesive is prepared from the following raw materials in parts by weight: 50 parts of toluene diisocyanate, 15 parts of hydroxyl terminated ethylene oxide-tetrahydrofuran copolyether, 10 parts of modified polyimide, fluorine-containing polyether 90 parts of ether glycol, 2 parts of dibutyltin dilaurate, 0.5 part of boron trifluoride triethanolamine complex, tetrakis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] 0.3 part of pentaerythritol ester and 0.3 part of antioxidant.

[0044] The modified polyimide is prepared by the following steps:

[0045] (1) Mix 51 parts of N,N-dimethylacetamide and 7 parts of 3,3',4,4'-biphenyltetracarboxylic dianhydride, stir under nitrogen for 10 minutes, and then add 2 parts of 2, 4,6-triaminopyrimidine was stirred for 48 hours;

[0046] (2) heating the obtained solution to 160° C., adding xylene and water azeotropically to remove the generated water, after cooling, washing the...

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PUM

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Abstract

The invention discloses a high-strength environment-friendly wood board adhesive and a preparation method thereof, which are prepared from the following raw materials in parts by weight: 30-50 parts of polyisocyanate, 5-15 parts of hydroxyl-terminated ethylene oxide-tetrahydrofuran copolyether, modified 5-10 parts of polyimide, 60-90 parts of fluorine-containing polyether diol, 0.5-2 parts of dibutyltin dilaurate, 0.2-0.5 parts of boron trifluoride triethanolamine complex, 0.1- part of antioxidant 0.3 part, antioxidant 0.1-0.3 part. In the preparation process of the adhesive of the invention, there are few side reactions and residual solvents, the preparation conditions are mild, the operation is simple, and the environment is not polluted. At the same time, the obtained product has excellent mechanical properties and can reach ideal standards in terms of bonding strength and shear strength. , has better use value.

Description

technical field [0001] The invention belongs to the technical field of adhesive preparation, and in particular relates to a high-strength environment-friendly wood board adhesive and a preparation method thereof. Background technique [0002] Wood adhesives are products used in the wood processing industry, such as the production of plywood, particleboard, laminates, decorative cladding panels and blockboards, which require adhesives with different properties. The emergence of adhesives not only plays an important role in saving wood and simplifying the production process, but also makes composite materials with various properties, so as to exert the unique functions of wood and provide some special purposes. In the traditional plywood industry, most of them use UF glue (urea-formaldehyde resin) to add a certain amount of starch to thicken and put into production, but because it will volatilize to produce formaldehyde, pollute the air, and cause hidden dangers to human healt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J179/08C09J11/06C09J11/08C08G18/48C08G18/50
CPCC09J175/08C09J11/06C09J11/08C08G18/4804C08G18/4837C08G18/5015C08L2201/08C08L79/08C08K5/1345
Inventor 卢文书
Owner 广东龙马新材料科技有限公司
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