| 摘要 |
<p>Hardened mouldings are produced from polymers and aq. silicate solns. (1) by mixing polymer particles (or particulate polymer mixtures) which have an expansion of 10-5-10 cm. in >=1 of the three spatial coordinates and which contain acidic gps., with (I) and then allowing the moulding to harden. A wide variety of polymers may be used, e.g. (A) polymers contng. acidic gps. in their mol. structure such as (co)polymers of itaconic or maleic acid or anhydride, (meth)acrylic acid etc.; (B) polymer which are non-reactive per se but contain additives with acidic functions, e.g. m-phosphoric acid, benzoic acid etc. Such polymers are PF, UF, epoxides, PVC, PVAc, fluoro resins etc. Mouldings harden after convenient pot-life to form dimensionally stable articles. Used e.g. in mfre. of light structural elements.</p> |
