| 摘要 |
PROBLEM TO BE SOLVED: To obtain a resin composition which is degraded by light or by soil or marine organisms or microorganisms by adding ultramicroparticulate titanium oxide to a mixture of a biodegradable aliphatic polyester with starch. SOLUTION: This composition is obtained by adding 0.5-2 pts.wt. ultramicroparticulate titanium dioxide having a mean particle diameter of 0.001-0.07μm in a state of primary particles and having a BET specific surface area of 30m<2> /g or above to 100 pts.wt. mixture of 80-60wt.% biodegradable aliphatic polyester with 20-40wt.% starch, and melt-kneading the resulting mixture at 80-250 deg.C.
|
