Environment-friendly soybean oil-based moisture-cured polyurethane wood adhesive

A soybean oil-based, epoxidized soybean oil technology, applied in the field of polyurethane adhesives, can solve problems such as not meeting the requirements of product environmental protection, and achieve the effects of reducing energy consumption costs, high bonding strength, and simplifying processes

Inactive Publication Date: 2017-12-15
郑州华普密封材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has certain economic benefits, but 5% to 35% solvent is still used in the preparation, which does not meet the current environmental protection requirements for products

Method used

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  • Environment-friendly soybean oil-based moisture-cured polyurethane wood adhesive
  • Environment-friendly soybean oil-based moisture-cured polyurethane wood adhesive
  • Environment-friendly soybean oil-based moisture-cured polyurethane wood adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The dehydration treatment of embodiment 1 soybean oil polyol and polyether polyol

[0022] Put a 250mL four-necked bottle in an oven at 120°C and dry it. Add 20g of soybean oil-based polyol and 80g of PPG2000 into the four-necked bottle. g, viscosity (45°C) is 913mPa·s. Install mechanical stirring, thermometer and nitrogen bladder. Turn on the stirring and oil pump, evacuate to a vacuum degree of about -0.098MPa, heat with a heating mantle, slowly raise the temperature to 120°C, dehydrate for 1.5h, until no bubbles escape, stop heating, wait until the temperature cools down to the temperature required for feeding , stop stirring, turn off the oil pump, and then blow in nitrogen to release the vacuum. In the following examples, soybean oil-based polyols and polyether polyols were mixed with this method for dehydration.

Embodiment 2

[0024] Add 64.6g of MDI after heating and melting into the soybean oil-based polyol and polyether diol mixture dehydrated according to the method in Example 1, control the temperature at 75°C, react for 1h, stop stirring, lower the system temperature, add 243uL prepared 2g / 10ml dibutyltin dilaurate and 153uL bismorpholine diethyl ether, after reacting for 30min, stop stirring, vacuumize again for 10min, get rid of the air bubbles in the reaction solution, and discharge the material to obtain 165g large Soybean oil-based polyurethane adhesive, stored in a desiccator airtight. The adhesive is heated to 85°C, the viscosity is 3500mPa·s, and the adhesive is used to bond wood with a moisture content of 8% by brushing. The glue amount is 125g / ㎡, and the pressure is 1.5MPa, pressurized for 12 hours, tested after 72 hours, the dry compressive shear strength of the product reached 10.84MPa, and the wet compressive shear strength after soaking at (60±5)°C for 3 hours was 5.82MPa.

Embodiment 3

[0026] Take by weighing 25g soybean oil-based polyol and 75g propylene oxide polyether glycol, join in the four-neck bottle after drying, carry out dehydration treatment according to the method in embodiment 1, add the 69.81g MDI after heating and melting In the mixed solution of soybean oil-based polyol and polyether diol, control the temperature at 75°C, react for 1h, stop stirring, lower the system temperature, add 252uL prepared 2g / 10ml dibutyltin dilaurate and 80uL bismorpholine di Ethyl ether, after reacting for 30 minutes, stop stirring, vacuumize again for 10 minutes, remove the air bubbles in the reaction solution, and discharge the material to obtain 169.81 g of soybean oil-based polyurethane adhesive for wood, which is placed in a desiccator for airtight storage. The adhesive is heated to 85°C, the viscosity is 2980mPa·s, and the adhesive is used to bond wood with a moisture content of 8% by brushing. The glue amount is 125g / ㎡, and the pressure is 1.5MPa, the pressu...

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Abstract

The invention discloses an environment-friendly soybean oil-based moisture-cured polyurethane wood adhesive, which comprises the following raw materials in percentage by mass: 15-35% of soybean oil-based polyol, 60-80% of polyether polyol, 10-25% of isocyanate, and 0.03-0.1% of catalyst. No solvents are added into the adhesive, so that the environment-friendly, healthy and safe requirements of the green adhesive can be met. The adhesive can be moisture-cured at room temperature, and has good adhesion performance after being applied in the field of wood adhesives. The invention further discloses a preparation method of the environment-friendly soybean oil-based moisture-cured polyurethane wood adhesive, and the preparation method comprises simple steps, is convenient to construct, has high economic benefits and is beneficial to industrial production.

Description

technical field [0001] The invention relates to a preparation method and application of an environment-friendly soybean oil-based moisture-curing polyurethane wood adhesive, and belongs to the technical field of polyurethane adhesives. Background technique [0002] Solvent-free soybean oil-based polyurethane adhesive is a new type of adhesive that has been researched in recent years. It is an adhesive synthesized from renewable soybean oil-based polyols. It has no solvent addition and no formaldehyde release. , has the advantages of good water resistance, thermal stability and high bonding strength, and at the same time, the process is simple, the economic benefit is good, and it meets the development requirements of environmental protection, safety and health adhesives. Soybean oil-based polyurethane adhesive is a copolymerization product of isocyanate, soybean oil-based polyol and polyether polyol. Its molecular chain contains active -NCO-groups and -NHCOO-groups, which ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/66C08G18/48C08G18/36
CPCC08G18/36C08G18/4825C08G18/6696C09J175/08
Inventor 魏柳荷刘兴江张洁吴林志武金笔顾刘峰
Owner 郑州华普密封材料有限公司
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