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Preparation method for producing butyl rubber through polyvinyl alcohol

A polyvinyl alcohol, butyl rubber technology, applied in the direction of adhesives, polyurea/polyurethane adhesives, adhesive types, etc., can solve the problems of complex and obvious bonding process, and cannot use rollers, etc., and achieve the bonding process. The effect of simplicity, improved bonding strength, and improved performance

Inactive Publication Date: 2017-03-08
YANCHENG OUHUA CHEM IND
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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 polyvinyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0022] a, the first polyvinyl alcohol, the second polyvinyl alcohol, the third polyvinyl alcohol, the fourth polyvinyl alcohol, the polyvinyl propanol, the sodium chloride solution and the The methanol is dehydrated in a 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 polyvinyl alcohol accounts for 639 parts; the second polyvinyl alcohol accounts for 559 parts; the third polyvinyl alcohol accounts for 445 parts; the fourth polyethylene Alcohol accounts ...

Embodiment 2

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

[0028] a, the first polyvinyl alcohol, the second polyvinyl alcohol, the third polyvinyl alcohol, the fourth polyvinyl alcohol, the polyvinyl propanol, the sodium chloride solution and the The methanol is dehydrated in a 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 polyvinyl alcohol accounts for 609 parts; the second polyvinyl alcohol accounts for 509 parts; the third polyvinyl alcohol accounts for 395 parts; the fourth polyethylene Alcohol accounts ...

Embodiment 3

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

[0034] a, the first polyvinyl alcohol, the second polyvinyl alcohol, the third polyvinyl alcohol, the fourth polyvinyl alcohol, the polyvinyl propanol, the sodium chloride solution and the The methanol is dehydrated in a 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 polyvinyl alcohol accounts for 689 parts; the second polyvinyl alcohol accounts for 609 parts; the third polyvinyl alcohol accounts for 495 parts; the fourth polyethylene Alcohol accounts ...

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Abstract

The invention provides a preparation method for producing a butyl rubber through polyvinyl alcohol. According to the present invention, the drying process is not required, the problems of environmental pollution and poisoning due to the presence of the solvent cannot be caused, and the environmental protection requirement is met; the adhesion process is simple, the roller coating or spray coating and other sizing method can be used, the operability is good, and two adhered materials can be fixed within a short time, such that the assembled member can be rapidly transferred into the next step so as to improve the working efficiency; the advantages of heat resistance, cold resistance, water vapor resistance, chemical resistance and solvent resistance are provided; and compared to the original hot melt adhesive, the adhesive 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 with polyvinyl alcohol. 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 structu...

Claims

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Application Information

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IPC IPC(8): C08G18/62C09J175/04
CPCC08G18/6212C08G2170/20C09J175/04
Inventor 卢圣茂王志伟郭宇时娇娇
Owner YANCHENG OUHUA CHEM IND
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