| 摘要 |
A biodegradable resin composition comprising polylactic acid and nanosheeted layered titanic acid characterized in that the nonasheeted layered titanic acid is nanosheeted layered titanic acid obtained by a preparing process comprising the steps of: (1) treating layered titanate represented by the general formula: <?in-line-formulae description="In-line Formulae" end="lead"?>A<SUB>x</SUB>M<SUB>y</SUB>□<SUB>z</SUB>Ti<SUB>2-(y+z)</SUB>O<SUB>4</SUB> (1) <?in-line-formulae description="In-line Formulae" end="tail"?> [wherein A and M represent a different monovalent to trivalent metal, □ represents a part defective in Ti, x is a positive real number satisfying 0<x<1.0, and y and z are 0 or a positive real number satisfying 0<y+z<1.0, respectively]with an acid or warm water to replace an A ion and/or a M ion with hydrogen and/or a hydronium ion, and (2) reacting the resulting compound with a basic compound having interlayer swelling activity thereon, to swell or peel between layers.
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