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
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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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