Nanocomposites for use e.g. in adhesives, circuit boards, construction parts or fire retardants contain an organic binder and a layered silicate modified by phosphorus-containing cations

摘要

Nanocomposites containing an organic binder and a layered silicate modified by specified phosphorus-containing cations with aromatic and non- aromatic substituents are new, such nanocomposites being excluded when the organic binder is a thermoplastic and the phosphorus-containing cations have all of the aromatic substituents as unsubstituted phenyl groups. Nanocomposites containing an organic binder and a layered silicate modified by phosphorus-containing organically-substituted cations of formula (I) are new, such nanocomposites being excluded when the organic binder is a thermoplastic and the phosphorus-containing cations have all R2> as unsubstituted phenyl groups. [(R1>)nP(R2>)m]+> (I) R1>non-aromatic substituents; and R2>aromatic substituents; m : 1- 4; n : 0-3; and m + n : 4. Independent claims are also included for (1) preparation of the nanocomposites by modifying the layered silicate with the phosphorus-containing cations and either (i) working the thus-modified silicates into a thermoplastic melt or (ii) working the thus-modified silicates into a monomer and/or a pre-polymer which is polymerizable and/or crosslinkable to a thermoplastic, elastomer or thermoset; and (2) nanocomposites containing an organic binder and a layered silicate modified by phosphorus-containing cations containing one or more phosphate ester, phosphorous acid ester, hypophosphorous ester and/or phosphine group. Also excluded are nanocomposites in which the binder is a thermoplastic and in which the cation with m = 3 is such that all aromatic residues R2> are unsubstituted in the para-postion to the cation.