Chlorosulfonated polyethylene latex
A technology for chlorosulfonated polyethylene and latex, applied in the field of latex, can solve the problems of difficulty in improving adhesion, poor static stability and mechanical stability, and achieves good mechanical stability and adhesion, and safe body and environment. , Good static stability
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[0065] In the preparation of the emulsion in step A, a method of stirring and mixing with an emulsifier having an appropriate shear force, such as a homogenizer, a colloid mill, etc., a method of dispersing and mixing with an ultrasonic disperser, etc., etc. can be used. , the method of stirring and mixing is usually preferred. The temperature at the time of stirring and mixing is not particularly limited, but it is preferably set at 5 to 70°C, particularly preferably at 35 to 60°C. In addition, the average particle size of the chlorosulfonated polyethylene in the target chlorosulfonated polyethylene latex can be adjusted by controlling stirring and mixing and ultrasonic dispersion when preparing the emulsion.
[0066] In the step B, as a method of removing the organic solvent from the emulsion obtained in the step A, for example, a conventional method such as a method of heating the emulsion under reduced pressure can be employed.
[0067] In addition, the emulsion after rem...
Embodiment 1
[0093] Chlorosulfonated polyethylene (trade name "Hypalon 45" of DuPont Dow Elastomer Japan Co., Ltd.: mass average molecular weight 142000, chlorine content 23.5% by mass, sulfur content 1.0% by mass) 45g, toluene 255g and oleic acid 0.45g were charged A detachable flask with an inner volume of 500 mL was stirred and dissolved at 85° C. for 4 hours to prepare an organic solvent solution. In addition, 7.5 g of polyoxyalkylene alkyl ether sodium sulfate (1) and 0.188 g of potassium hydroxide were dissolved in 170 g of water to prepare an aqueous solution.
[0094] An aqueous solution was added to the organic solvent solution, and the mixture was stirred and mixed for 10 minutes with a homogenizer (trade name "TK homomixer M type" of Tokukikika Kogyo Co., Ltd.) to obtain an emulsion. The rotational speed and temperature during stirring and mixing were set to 12000 rpm and 40° C., respectively. The obtained emulsion was heated to 40-70° C. under reduced pressure of 40-90 kPa to ...
Embodiment 2
[0096] In addition to using a mixture of polyoxyalkylene alkyl ether sodium sulfate (1) 4.5g and polyoxyalkylene alkyl ether sodium sulfate (2) 3.6g to replace polyoxyalkylene alkyl ether sodium sulfate (1) 7.5g, the same as the implementation Example 1 was operated in the same manner to prepare chlorosulfonated polyethylene latex.
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