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Single-component polyurethane adhesive and preparation method thereof

A polyurethane adhesive, one-component technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of yellowing resistance, no toughness, poor UV resistance, etc., and prolong the service life. , to meet the water resistance, improve the effect of bond strength

Inactive Publication Date: 2019-11-22
无锡庄周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

[0005] Aiming at the deficiencies of the prior art, the present invention provides a single-component polyurethane glue and its preparation method, which solves the problem that the adhesive stone concrete made of two-component epoxy resin on the market has high hardness, no toughness, and is not durable. Yellowing, poor UV resistance, short service life, and failure to achieve expected results

Method used

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  • Single-component polyurethane adhesive and preparation method thereof
  • Single-component polyurethane adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] S1. Put 13 parts of hydroxy silicone oil, 15 parts of polycarbonate diol and 35 parts of trifunctional polyether polyol into the reaction stick, stir and heat up to 105°C, keep warm and vacuumize for 55 minutes, and cool down to 57°C after the moisture content is less than 0.025%. ℃, then add 7 parts of chain extender and stir evenly;

[0032] S2. After stirring evenly, add 0.0225 parts of catalyst, the above catalyst is added in 3 times, each interval is 4 minutes, while controlling the reaction temperature, the temperature is controlled at 55 ° C;

[0033] S3. Slowly drop 45 parts of HDI monomer into the reactor, control the temperature at 65°C for 45 minutes, then raise the temperature to 75°C for 45 minutes, and finally raise the temperature to 85°C After 45 minutes of reaction, after all the HDI monomers are added dropwise, control the temperature at 83°C and keep it warm for three hours;

[0034] S4. Sampling and detection-NCO content, after reaching the required...

Embodiment 2

[0037] S1. Put 10 parts of hydroxy silicone oil, 10 parts of polycarbonate diol and 30 parts of trifunctional polyether polyol into the reaction stick, stir and heat up to 100°C, keep warm and vacuumize for 50 minutes, and cool down to 55°C after the moisture is less than 0.02%. ℃, then add 5 parts of chain extender and stir evenly;

[0038] S2. After stirring evenly, add 0.015 parts of catalyst, the above catalyst is added in 3 times, each interval is 3 minutes, while controlling the reaction temperature, the temperature is controlled at 50 ° C;

[0039] S3. Slowly drop 40 parts of HDI monomer into the reactor, control the temperature at 60°C and react for 45 minutes. After all the HDI monomers are added dropwise, raise the temperature to 70°C and react for 45 minutes. Finally, the temperature was raised to 80°C for 45 minutes, and the temperature was controlled at 80°C for three hours;

[0040] S4. Sampling and detection-NCO content, after reaching the required predetermine...

Embodiment 3

[0043]S1. Put 15 parts of hydroxy silicone oil, 20 parts of polycarbonate diol and 40 parts of trifunctional polyether polyol into the reaction stick, stir and heat up to 110°C, keep warm and vacuumize for 60 minutes, and cool down to 60°C after the moisture is less than 0.03%. ℃, then add 10 parts of chain extender and stir evenly;

[0044] S2. After stirring evenly, add 0.03 parts of catalyst, the above catalyst is added in 3 times, each interval is 5 minutes, and the reaction temperature is controlled at the same time, and the temperature is controlled at 60 °C;

[0045] S3. Slowly drop 50 parts of HDI monomer into the reactor, control the temperature at 70°C for 45 minutes, then raise the temperature to 80°C for 45 minutes, and finally raise the temperature to 90°C After 45 minutes of reaction, after all the HDI monomers are added dropwise, the temperature is controlled between 83-85°C and kept for three hours;

[0046] S4. Sampling and detection-NCO content, after reachi...

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Abstract

The invention discloses a single-component polyurethane adhesive and a preparation method thereof. The raw materials comprise the following components in parts by weight: 40 to 50 parts of HDI monomers, 10 to 15 parts of hydroxyl-terminated silicone oil, 10 to 20 parts of polycarbonate diol, 30 to 40 parts of trifunctional polyether polyol, 5 to 10 parts of chain extender and 0.015 to 0.03 part ofcatalyst. The trifunctional polyether polyol is a reaction product of polyol and polyisocyanate, the polyol contains trifunctional polyether polyol with more than one ethyleneoxy group in one molecule and the number average molecular weight of more than 3000, and the invention relates to the technical field of preparation of polyurethane adhesives. According to the invention, in specific practical application, the adhesive strength between glue and stones can be improved, outdoor water resistance, weather resistance, ultraviolet resistance, yellowing resistance and aging resistance are met, the service life of the water-permeable adhesive stone is prolonged, and by means of low viscosity of hydroxyl silicone oil, the polyurethane adhesive is solvent-free, more environmentally friendly inuse and capable of meeting the requirements of time development.

Description

technical field [0001] The invention relates to the technical field of preparing polyurethane adhesives, in particular to a single-component polyurethane adhesive and a preparation method. Background technique [0002] Polyurethane glue is a glue containing urethane and isocyanate groups in the molecular chain. Due to the strong polar isocyanate and urethane groups, it has high reactivity and can be cured at room temperature, so it is suitable for metal, rubber, glass, ceramics, etc. , plastic, wood, fabric, leather and other materials have excellent adhesive properties. The main chain of polyurethane is very flexible. Its biggest feature is that it can withstand shock, vibration and bending fatigue, and has high peel strength, especially low temperature resistance. It is extremely excellent and ranks first among the existing glues. The polyurethane glue has a simple process and can be cured at room temperature and heating. When different materials are glued, the effect of t...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/61C08G18/44C08G18/48C08G18/32C09J175/08
CPCC08G18/3206C08G18/4018C08G18/44C08G18/4829C08G18/61C08G18/6607C09J175/08
Inventor 张志平
Owner 无锡庄周新材料科技有限公司
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