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High-performance adhesive and its preparation method and use

A kind of adhesive, high-performance technology, applied in the direction of sulfide preparation, organic chemistry, etc., to achieve the effects of large performance adjustable range, high yield, and simple bonding process operation

Inactive Publication Date: 2017-03-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on improving the adhesive properties of polyurethane by introducing sulfur into the main chain structure of polyurethane through the synthesis of sulfur-containing diol chain extenders has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Synthesis of the first step sulfur-containing chain extender

[0061] In a four-necked reaction flask equipped with a thermometer, an electric stirrer and a reflux condenser, add 10% NaOH aqueous solution (151.2 g) and 4,4'-dimercaptodiphenyl sulfide (0.1 mol), and 2-chloro- 1-Ethanol (0.2mol) and 11.7mL of absolute ethanol were mixed evenly, and then added dropwise to the system under vigorous stirring. After the dropwise addition was completed for 5 minutes, the temperature was raised to 90°C, and the reaction was kept for 1 hour. Cool to room temperature after the reaction, vacuum filter, wash twice with distilled water and dry to obtain a crude product, then purify twice with benzene, and dry in vacuum to obtain a powder solid with a yield of 68.77%, which is sealed for future use.

[0062] Synthesis of the second step adhesive

[0063] (1) vacuum dehydrate polyethylene adipate (molecular weight: 1000) at 100°C for 3 hours, and seal it for later use;

[0064] (2) ...

Embodiment 2

[0070] Synthesis of the first step sulfur-containing chain extender

[0071] In a four-necked reaction flask equipped with a thermometer, an electric stirrer and a reflux condenser, add 15% NaOH aqueous solution (100.8g) and 1,3-propanedithiol (0.1mol), and 3-chloro-1-propane Alcohol (0.21mol) and 24.5mL of absolute ethanol were mixed evenly, and then added dropwise to the system under strong stirring. After the dropwise addition was completed for 6 minutes, the temperature was raised to 85°C, and the reaction was kept for 1.5h. Cool to room temperature after the reaction, vacuum filter, wash twice with distilled water and dry to obtain a crude product, then purify twice with benzene, and dry in vacuum to obtain a powder solid with a yield of 72.04%, which is sealed for future use.

[0072] Synthesis of the second step adhesive

[0073] (1) vacuum dehydrate polybutylene adipate (molecular weight: 700) at 120° C. for 3 hours, and seal it for later use;

[0074] (2) Add dehydr...

Embodiment 3

[0080] Synthesis of the first step sulfur-containing chain extender

[0081] In a four-necked reaction flask equipped with a thermometer, an electric stirrer and a reflux condenser, add 10% NaOH aqueous solution (100.8g) and 1,6-hexanedithiol (0.1mol), and 4-chloro-1-butanol Alcohol (0.21mol) and 30.6mL of absolute ethanol were mixed evenly and added dropwise to the system under vigorous stirring. After the dropwise addition was completed for 7 minutes, the temperature was raised to 90°C, and the reaction was kept for 1.5 hours. Cool to room temperature after the reaction, vacuum filter, wash twice with distilled water and dry to obtain the crude product, then purify twice with benzene, and obtain powder solid after vacuum drying with a yield of 72.58%, which is sealed for future use.

[0082] Synthesis of the second step adhesive

[0083] (1) vacuum dehydrate polyethylene adipate-propylene glycol (molecular weight: 1500) at 120°C for 3 hours, and seal it for later use;

[0...

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PUM

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Abstract

The invention discloses a high-performance adhesive. The high-performance adhesive comprises polyester diol, diisocyanate and a chain extender according to a mass ratio of 1: 0.42: 0.25 to 1: 0.85: 0.85. The high-performance adhesive has the advantages of use of easily available raw materials, curing at the room temperature or under heating, no side reaction, operation simpleness and strong adhesion.

Description

technical field [0001] The invention belongs to a high-performance adhesive and its preparation method and application. Background technique [0002] Polyurethane adhesives started in the 1940s. Polyurethane (PU) is generally composed of isocyanate, polyols, chain extenders and other additives. Because it contains very polar and chemically active isocyanate and urethane groups, It can react with active hydrogen to form excellent chemical adhesion; at the same time, polyurethane adhesive has excellent low temperature resistance, good wear resistance, water resistance, solvent resistance, chemical resistance and other properties, and its good adhesion It has strong bonding adaptability to metal, rubber, glass, ceramics, plastic, wood, plants, leather and other materials, so it is widely used in many fields. Polyurethane adhesives are divided into three categories according to the reaction composition: polyisocyanate adhesives, polyurethane prepolymer adhesives, and polyuretha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/04C08G18/42C08G18/44C08G18/32C08G18/10C07C319/14C07C323/12
CPCC09J175/06C07C319/14C08G18/10C08G18/4238C08G18/4277C08G18/44C09J175/04C07C323/12C08G18/3876
Inventor 亢茂青王媛赵雨花王军威李其峰冯月兰殷宁梁辰
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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