Phosphonium salt, organically modified layered silicate containing the phosphonium salt and composition thereof
View Patent ↗A tetraalkylphosphonium salt having at least one branched alkyl chain containing 9 to 100 carbon atoms in total, an organically modified layered silicate containing the tetraalkylphosphonium salt having at least one branched alkyl chain containing 9 to 100 carbon atoms in total between layers of a layered silicate and a composition comprising the organically modified layered silicate and an organic solvent or a thermoplastic resin. There are provided a tetraalkylphosphonium salt for a layered silicate having thermal stability and dispersibility superior to those of conventional organophilized layered silicates, an organically modified layered silicate containing the tetraalkylphosphonium salt and a composition thereof.
1. A tetraalkylphosphonium salt having at least one branched alkyl chain containing 12 to 100 carbon atoms in total.
2. The tetraalkylphosphonium salt according to claim 1 , wherein said branched alkyl chain contains 12 to 50 carbon atoms in total.
3. The tetraalkylphosphonium salt according to claim 1 , wherein said branched alkyl chain contains 16 to 36 carbon atoms in total.
4. The tetraallkylphosphonium salt according to claim 1 , wherein said branched alkyl chain branches at the 2-position.
5. The tetraalkylphosphonium salt according to claim 4 , wherein said branched alkyl chain is 2-hexadecylicosyl group.
6. The tetraalkylphosphonium salt according to claim 1 , wherein alkyl chains other than said branched alkyl chain each contains 4 or more carbon atoms in total.
7. The tetraalkylphosphonium salt according to claim 1 , wherein alkyl chains other than said branched alkyl chain are the same.
8. The tetraalkylphosphonium salt according to claim 7 , wherein alkyl chains other than said branched alkyl chain are n-butyl group.
9. The tetraalkylphosphonium salt according to claim 1 , which comprises an anion selected from the group consisting of anions of halogen atom, p-toluenesulfonic acid, BF 4 , ClO 4 , PF 6 and NO 3 .