Hydrophilic polymers, articles and methods of making same

Details Hydrophilic polymers, articles and methods of making same Hydrophilic polymers, articles and methods of making same

1973-08-07

1976-03-02

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

3 1, 3 14, 3 15, 260 25R, 260 25EP, 260 25N, 260 8, 260 27R, 260 291SB, 260 336UA, 260 4221, 260 861E, 260837R, 260844, 260857UN, 260857G, 264 1, 264183, 264210R, 351160, 351177, C08K 324, C08K 501, C08L 3102

Patent

active

039418588

ABSTRACT:
A process for preparing hydrophilic cross-linked polymers and products prepared thereby, said process comprising admixing in a solvent-free system in the presence of a free radical, vinyl polymerization catalyst and reacting a major amount of a water-soluble polymerizable monoester of an olefinic acid having at least one substituted functional group with a minor amount of a polymerizable diester of one of said olefinic acids having at least two esterifiable hydroxyl groups. The novel products include a solid friable foam which can be disintegrated to powder. Shaped bodies can be prepared in the form of articles which can be cast with additives such as fragrances, medicinals, flavors, chemicals and the like, which are gradually released from the article when it is wetted in water or alcohol. Liquid casting syrups adapted to be polymerized in situ with or without additives can be formed. The casting syrups can be prepared in water to yield a polymer soluble in alcohol which is suitable for formation of hydrophilic coatings as by spray, dip, casting and the like.

REFERENCES:
patent: 2558139 (1951-06-01), Knock et al.
patent: 2861965 (1958-10-01), Roncoroni
patent: 3220960 (1965-10-01), Wichterle et al.
Refojo et al., "Jour. of Applied Polymer Science," Vol. 9 (1965), pp. 2425-2435.

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