After drying, it was tried to pulverized comparative dried product (3) with a roll mill in the same manner as the Comparative example 1. However, there were non-dried products which strongly adhered onto the surface of the roll mill, and therefore it was impossible to crush them. Comparative Example 4
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In a method for producing a water absorbent resin by drying a particulate hydrogel having a high solid content concentration (of 45% by weight or more, preferably 50% by weight or more, and more preferably 55% by weight or more), a method for efficient drying water absorbent resin having maintained/improved physical properties is provided.
Ethylene propylene copolymer elastomers and ethylene propylene diene terpolymer elastomers are shown which, when cured, exhibit improved oil resistance and chemical aging properties at elevated temperatures and pressures. A previously polymerized liquid 1,2-polybutadiene is incorporated into the ...