| 摘要 |
A porous, absorbent, polymeric macrostructure comprising an interparticle crosslinked aggregate comprising multiplicity of precursor particles of substantially water-insoluble, absorbent, hydrogel-forming, polymer material and from 0.01 to 30 parts by weight per 100 parts by weight of the precursor particles of an interparticle crosslinking agent reacted with said polymer material of said precursor particles to form covalent crosslink bonds between said precursor particles; said interparticle crosslinked aggregate having pores between adjacent of said precursor particles, said pores being interconnected by intercommunicating channels thus forming a liquid permeable macrostructure, the circumscribed dry volume of the macrostructure being greater than about 10.0 mm3. Therefore, the reaction will generally be carried out at a temperature in the range from about 120 DEG C to about 300 DEG C. The time to complete the reaction, in the absence of catalysts, will generally be from about 5 minutes to about 6 hours. |
