Water-absorbent resins and manufacturing methods thereof

Details Water-absorbent resins and manufacturing methods thereof Water-absorbent resins and manufacturing methods thereof

1997-01-24

1998-08-11

Lipman, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 58, 536 63, C08B 1600

Patent

active

057928550

ABSTRACT:
Water-absorbent resins which are prepared by mixing polysaccharides with amino acids (amino acids and/or polymers of amino acids) and heating the mixture so as to cause a crosslinking reaction therein. Each of the water-absorbent resins has a water-absorbing ratio of not less than 10 g/g with respect to physiologic saline as well as having a rate of biodegradability of not less than 10%. Moreover, its water-absorbing ratio under pressure is not less than 10 ml/g with respect to physiologic saline. The water-absorbing ratio under pressure is measured by using a measuring device that is constituted of a weighing machine, a container, an air-intake pipe, a conduit, a glass filter, and a measuring section. The water-absorbent resins are superior in both water-absorbing capacity and biodegradability, and are capable of maintain their water-absorbing capacity even under pressure.

REFERENCES:
patent: 4697008 (1987-09-01), Asano et al.
patent: 4722739 (1988-02-01), Blanchard et al.
patent: 4990551 (1991-02-01), Haubl et al.

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