Preparation method of nano-modified polyurethane adhesive

A polyurethane adhesive, nano-modification technology, applied in the direction of adhesive, adhesive type, non-polymer adhesive additives, etc., can solve the problem of unsatisfactory heat resistance, achieve excellent adhesive performance, reasonable preparation method, Strong mechanical properties

Inactive Publication Date: 2015-12-16
太仓顺如成建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the heat resistance is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of nano-modified polyurethane adhesive, comprising the following steps:

[0023] a. Heating the polyester diol in a vacuum environment for 1 hour to obtain polyether diol, the vacuum degree is controlled at -0.05MPa, and the temperature is controlled at 95°C;

[0024] b. Add diphenylmethane diisocyanate to the obtained polyether diol at room temperature, then raise the temperature to 60°C, and react for 1.5h;

[0025] c. Then add polyoxalate-1,4-butylene glycol ester diol, control the temperature at 40°C, and react for 2 hours to prepare a prepolymer;

[0026] d. Add nano-silica to the obtained prepolymer, and use ultrasonic waves and stirrers to stir the prepolymer at the same time, so that the nano-silica is evenly distributed in the prepolymer, and the stirring time is 30 minutes to obtain nano-modified polyurethane ;

[0027] e. The obtained nano-modified polyurethane is reacted with polyphenol glycidyl epoxy resin for 1 hour, and the temperat...

Embodiment 2

[0029] A preparation method of nano-modified polyurethane adhesive, comprising the following steps:

[0030] a. Heating the polyester diol in a vacuum environment for 1.5h to obtain polyether diol, the vacuum degree is controlled at -0.1MPa, and the temperature is controlled at 100°C;

[0031] b. Add diphenylmethane diisocyanate to the obtained polyether diol at room temperature, then raise the temperature to 80°C, and react for 2 hours;

[0032] c. Then add polyethylene glycol-1,4-butanediol, control the temperature at 60°C, and react for 3 hours to prepare a prepolymer;

[0033] d. Add nano-silica to the obtained prepolymer, and use ultrasonic wave and stirrer to stir the prepolymer at the same time, so that the nano-silica is evenly distributed in the prepolymer, and the stirring time is 40min to obtain nano-modified polyurethane ;

[0034] e. The obtained nano-modified polyurethane is reacted with polyphenol type glycidyl epoxy resin for 1.5 hours, and the temperature is...

Embodiment 3

[0036] A preparation method of nano-modified polyurethane adhesive, comprising the following steps:

[0037] a. Heating the polyester diol in a vacuum environment for 2.5 hours to obtain polyether diol, the vacuum degree is controlled at -0.15MPa, and the temperature is controlled at 130°C;

[0038] b. Add diphenylmethane diisocyanate to the obtained polyether diol at room temperature, then raise the temperature to 100°C, and react for 3 hours;

[0039] c. Then add polyethylene glycol-1,4-butanediol, control the temperature at 80°C, and react for 5 hours to prepare a prepolymer;

[0040] d. Add nano-silica to the obtained prepolymer, and use ultrasonic waves and agitator to stir the prepolymer at the same time, so that the nano-silica is evenly distributed in the prepolymer, and the stirring time is 60min to obtain nano-modified polyurethane ;

[0041] e. The obtained nano-modified polyurethane is reacted with polyphenol glycidyl epoxy resin for 2 hours, and the temperature ...

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PUM

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Abstract

The invention discloses a preparation method of nano-modified polyurethane adhesive. The preparation method comprises the steps of a, heating polyester polyol for 1 to 2.5h under a vacuum environment to obtain polyether polyol; b, adding the obtained polyether polyol into diphenyl-methane-diisocyanate at the room temperature for reacting; c, adding poly oxalic acid-1,4-butylene adipate glycol for reacting to prepare a prepolymer; d, adding the obtained prepolymer into nanosilicon dioxide, and stirring the prepolymer simultaneously by adopting ultrasonic waves and a stirrer, so as to obtain nano-modified polyurethane; e, enabling the obtained nano-modified polyurethane to react with polyphenol type glycidol epoxy resin for 1 to 2h, so as to obtain the nano-modified polyurethane adhesive. The preparation method is reasonable and simple, and the obtained nano-modified polyurethane adhesive has excellent adhesive property, good flexibility, high mechanical property, and good impact resistance, high-temperature resistance and low-temperature resistance, cannot volatilize noxious substances to harm human bodies and environment, and can be widely applied to the field of industry.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a preparation method of nano-modified polyurethane adhesives. Background technique [0002] Polyurethane is the abbreviation of urethane, with the group -NHCOOR. Polyurethane adhesive is an important part of the rapidly developing polyurethane resin. It has excellent performance and has been widely used in many aspects. It is one of the important varieties among the eight synthetic adhesives. It is suitable for various structural bonding fields and has excellent flexibility characteristics. [0003] Polyurethane adhesives have many unique properties, such as good flexibility, low temperature resistance and impact resistance. But the heat resistance is not ideal enough. Silicone modified polyurethane can improve the heat resistance of polyurethane adhesive. If resin is used to modify silicone polyurethane, not only the water resistance of polyurethane can be improved, but also the rig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/06C09J163/02C09J11/04C08G18/42C08G18/48C08G18/76
Inventor 赵文刚
Owner 太仓顺如成建筑材料有限公司
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