H. Kaczmarek et al., STRUCTURE OF POLY(ACRYLIC ACID)-HF,TI,ZR(IV) CHLORIDE GELS AND THEIR POTENTIAL APPLICATION IN DENTISTRY, Journal of applied polymer science, 60(13), 1996, pp. 2321-2327
Poly(acrylic acid) [poly(polypropenoic acid)] (PAA) can form stable an
d insoluble, colorless hydrogels with HfCl4, TiCl4, and ZrCl4 in water
. Two carboxylic groups of PAA are complexed by the M(OH)(2)(2+) ions.
Hydrogels formed from PAA-MCl(2)(OH)(2) (where M = Hf, Zr) (2 : 1) ha
ve found practical application in the blocking of microscopic channels
in tooth dentin, and thereby decrease the fluid permeability and prot
ect against tooth decay. (C) 1996 John Wiley & Sons, Inc.