US Patent 7655207 Aluminum complex hydroxide salt and method of producing the same

An aluminum complex hydroxide salt having Al oxide octahedral layers and a divalent anion among the octahedral layers, wherein an aluminosilicate anion expressed by the following general formula (1),[NapAlqSirOz]2−  (1)wherein p, q, r and z are positive numbers satisfying,5≦z≦20,z=(p/2)+(3q/2)+2r+1,0<p/q<1,0.01≦q/r≦1is, at least, contained as the divalent anion. The aluminum complex hydroxide salt can be favorably used as a compounding agent for resins, and exhibits excellent heat retaining property as well as excellent transparency particularly when it is mixed as a heat retaining agent into films for agricultural use.