Water absorbing polymer compositions and articles prepared there

Details Water absorbing polymer compositions and articles prepared there Water absorbing polymer compositions and articles prepared there

1986-04-11

1988-05-10

Lieberman, Allan M.

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

128156, 525186, 525187, A61F 1316, C08L 7100, C08L 7102

Patent

active

047432446

ABSTRACT:
A polymer composition which is water-absorbent upon curing comprising: (a) a copolymer containing from about 25 to about 75 mole percent recurring units of at least one .alpha.,.beta.-unsaturated monomer bearing at least one pendant unit selected from the group consisting of a carboxylic acid unit, a carboxylic acid salt unit, a carboxylic acid anhydride unit, a carboxylic acid imide unit, a carboxylic acid amide unit and a carboxylic acid ester unit and from about 75 to about 25 mole percent recurring units of a copolymerizable monomer; and, (b) a polyether derived from C.sub.2 to C.sub.10 alkylene oxides, wherein from about 20 to about 65 percent of the total pendant units introduced through the .alpha.,.beta.-unsaturated monomer must either be carboxylic acid units or must be converted to carboxylic acid units and from about 35 to about 80 percent of the pendant units must either be carboxylic acid salt units or must be converted to carboxylic acid salt units and wherein at least a portion of the oxide groups on the polyether are interacted with the carboxyl hydrogen atoms on the pendant carboxylic acid units such that the copolymer and the polyether are associated through hydrogen bonds.

REFERENCES:
patent: 3387061 (1968-06-01), Smith et al.
patent: 3993552 (1976-11-01), Assarsson et al.
Ikawa et al., Journal of Polymer Science (Polymer Chemistry Edition) vol. 3, No. 7, pp. 1505-1514 (Jul., 1975).

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