Abstract： |
Diacrylic polyglycol as one crosslinking agent with different molecular weight is obtained through the distillation with pressure reduced of polyglycol of 200-1500 molecular weight, reaction with metal sodium powder to obtain polyglycol sodium; reaction of polyglycol sodium and acryloyl chloride in chloroform solvent in certain sealed conditions, filtering and distillation with pressure reduced of the reaction product. High-hydroscopicity resin may be prepared through adding deionized water into acrylic acid monomer, partial neutralization with sodium hydroxide, adding 2-methyl-(2-acryloyl) propyl sodium sulfonate, leading in nitrogen gas, adding the said crosslinking agent, and final adding peroxide initiator for reaction. The said crosslinking agent has long molecular chain and moderate activity; and the high-hydroscopicity resin is homogeneously crosslinked and has less soluble linear polymer, fast water absorbing speed, high salt solution absorbing amount and relatively high strength. |
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