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Preparation method for producing butyl rubber through polyethylene

A butyl rubber and polyethylene technology, applied in the direction of adhesives, polyurea/polyurethane adhesives, adhesive types, etc., can solve the problems of complex and obvious bonding process, environmental pollution, etc., and achieve simple and convenient bonding process. Improved adhesive strength and good operability

Inactive Publication Date: 2017-02-15
JIANGSU JIHUA CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing hot melt adhesives have complicated preparation methods, require a drying process, have obvious environmental pollution and poisoning problems, and cannot meet environmental protection requirements. The bonding process is relatively complicated, and sizing methods such as roller coating or spraying cannot be used.

Method used

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  • Preparation method for producing butyl rubber through polyethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] like figure 1 shown, including the following steps:

[0022] a, the first polyethylene, the second polyethylene, the third polyethylene, the fourth polyethylene, the dimethyl-4-methylphenol, the sodium chloride solution and The polyethylene powder is dehydrated in vacuum at 50-70°C for 0.5-0.8h;

[0023] b. After completing step a, when the temperature is -170--180°C, add 80-880 parts of the diphenylmethane diisocyanate while stirring, and then add it into a four-necked flask, and keep it warm for 0.5-0.7h;

[0024] c. Take the sample in step b, analyze that the mass fraction of NCO is basically consistent with the design value, add 1-5 parts of stabilizer, and vacuum defoam for 20-30 minutes, then seal and store.

[0025] Preferably in the present invention, the first polyethylene accounts for 639 parts; the second polyethylene accounts for 559 parts; the third polyethylene accounts for 445 parts; and the fourth polyethylene accounts for 445 parts. 377 parts; The di...

Embodiment 2

[0027] like figure 1 shown, including the following steps:

[0028] a, the first polyethylene, the second polyethylene, the third polyethylene, the fourth polyethylene, the dimethyl-4-methylphenol, the sodium chloride solution and The polyethylene powder is dehydrated in vacuum at 50-70°C for 0.5-0.8h;

[0029] b. After completing step a, when the temperature is -170--180°C, add 80-880 parts of the diphenylmethane diisocyanate while stirring, and then add it into a four-necked flask, and keep it warm for 0.5-0.7h;

[0030] c. Take the sample in step b, analyze that the mass fraction of NCO is basically consistent with the design value, add 1-5 parts of stabilizer, and vacuum defoam for 20-30 minutes, then seal and store.

[0031] Preferably in the present invention, the first polyethylene accounts for 609 parts; the second polyethylene accounts for 509 parts; the third polyethylene accounts for 395 parts; and the fourth polyethylene accounts for 509 parts. 327 parts; The di...

Embodiment 3

[0033] like figure 1 shown, including the following steps:

[0034] a, the first polyethylene, the second polyethylene, the third polyethylene, the fourth polyethylene, the dimethyl-4-methylphenol, the sodium chloride solution and The polyethylene powder is dehydrated in vacuum at 50-70°C for 0.5-0.8h;

[0035] b. After completing step a, when the temperature is -170--180°C, add 80-880 parts of the diphenylmethane diisocyanate while stirring, and then add it into a four-necked flask, and keep it warm for 0.5-0.7h;

[0036] c. Take the sample in step b, analyze that the mass fraction of NCO is basically consistent with the design value, add 1-5 parts of stabilizer, and vacuum defoam for 20-30 minutes, then seal and store.

[0037] Preferably in the present invention, the first polyethylene accounts for 689 parts; the second polyethylene accounts for 609 parts; the third polyethylene accounts for 495 parts; the fourth polyethylene accounts for 495 parts. 427 parts; the dimeth...

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Abstract

The invention provides a preparation method for producing a butyl rubber through polyethylene. According to the present invention, the drying process is not required, and the presence of the solvent cannot cause the problems of environmental pollution and poisoning so as to meet the environmental protection requirement; the adhesion process is simple, wherein the roller coating or spraying and other sizing methods can be adopted; the operability is good, wherein the two objects to be adhered can be fixed within the short time, such that the assembly member can be rapidly transferred into the next processing step so as to improve the working efficiency; the obtained product has advantages of heat resistance, cold resistance, water vapor resistance, chemical resistance and solvent resistance; and compared to the original hot melt adhesive, the product of the present invention has the following characteristics that the performances and the adhesion strength are substantially improved due to the cross-linking structure of the reactive hot melt adhesive.

Description

technical field [0001] The invention relates to the field of butyl rubber production technology, in particular to a preparation method for producing butyl rubber through polyethylene. Background technique [0002] Butyl rubber is a moisture-curing reactive polyurethane hot-melt adhesive, which is called a moisture-curing reactive polyurethane hot-melt adhesive in Chinese. The main component is isocyanate-terminated polyurethane prepolymer, and the adhesion and toughness (elasticity) of PUR can be adjusted. And has excellent bonding strength, temperature resistance, chemical corrosion resistance and aging resistance, has become one of the important varieties of adhesive industry in recent years, and is now widely used in packaging, wood processing, automobiles, textiles, electromechanical and aerospace and other fields of the national economy. [0003] Butyl rubber is a polar and chemically active urethane group (-NHCOO-) or isocyanate group (-NCO) in its molecular structure...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J123/06C09J11/06C09J11/04
Inventor 屠国锋
Owner JIANGSU JIHUA CHEMICAL CO LTD
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