Resin composition and method for manufacturing the same

1 . A resin composition comprising a thermoplastic resin and inorganic particles having major axes less than 1 μm and aspect ratios in a range of from 3 to 1000 and dispersant both of which are frozen and dried at a temperature lower than 30° C. below the freezing point by means of freeze vacuum drying before blended with said thermoplastic resin.

2 . The resin composition as defined in claim 1 , wherein a total content of said inorganic particles and said dispersant is in a range of from 0.5 to 30% by mass.

3 . The resin composition as defined in claim 1 , wherein said inorganic particles and said dispersant are frozen and dried within one hour.

4 . A method for manufacturing resin composition which comprises a thermoplastic resin and inorganic particles having major axes less than 1 μm and aspect ratios in a range of from 3 to 1000 and dispersant blended with said thermoplastic resin, said resin composition manufacturing method comprises the steps of:

preparing a dispersion liquid of said inorganic particles and said dispersant dispersed in a solvent;

freezing and drying said dispersion liquid at a temperature lower than 30° C. below the freezing point by means of freeze vacuum drying; and

blending said inorganic particles and said dispersant with said thermoplastic resin.

5 . The resin composition manufacturing method as defined in claim 4 , and further comprising the step of blending said inorganic particles and said dispersant after freeze vacuum drying with said thermostatic resin by means of melt kneading.

6 . The resin composition manufacturing method as defined in claim 4 , wherein said freeze vacuum drying is completed within one hour.