A water absorbent,whose water absorptivity is about 1400 and salt solution absorptioity 170,is made by adding acrylic acid,starch gum as basic material,persulfate as initiating agent,N,N′-methylene acrylic amicle as crosslinker,urea as assistant, water as solvent and not using nitrogen for protection.It can be used in fields such as physiologic sanitary,agriculture,forestry,gardening,oil field etc.
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