| abstract |
Phosphonic acid polymers are prepared from di- or polyphosphonic acids having one or more unsaturated C=C bonds (e.g. vinylidene-1, 1-diphosphonic acid), either as homopolymers or as higher polymers with at least one further compound having unsaturated C=C bonds (e.g. acrylic acid). The polymers can be used as, or in connection with, flame-retardants, corrosion inhibitors, coatings, cements and ion exchange resins. |