Patent ID: 7714048

Claim:
A biodegradable resin composition containing a surfactant represented by following Formula (A): [wherein R 1 , R 2 , R 3 and R 4 are the same as or different from one another and each represent a straight- or branched-chain alkyl group, alkenyl group, hydroxyalkyl group, alkylaryl group, arylalkyl group, each of which has one to thirty carbon atoms, -(A 1 O) f —R a group (wherein A 1 represents an alkylene group having two to four carbon atoms; “f” denotes 1 to 50; and R a represents a straight- or branched-chain alkyl group, alkenyl group, hydroxyalkyl group or alkylaryl group, each of which has one to thirty carbon atoms) or a group represented by following Formula (A′): R 5 —X 2 —R 6 — (A′) (wherein R 5 represents a straight- or branched-chain alkyl group, alkenyl group, hydroxyalkyl group or alkylaryl group, each of which has one to thirty carbon atoms; R 6 represents an alkylene group having one to thirty carbon atoms; and X 2 represents —C(═O)NH—, —NHC(═O)—, —C(═O)O—, —OC(═O)— or —O—); X 1 is represented by following Formula (B): R 8 OOC—(CH 2 ) p —(CHSO 3 ) q —COOR 9 (B) (wherein R 8 and R 9 are the same as or different from one another and each represent a straight- or branched-chain alkyl group, alkenyl group, hydroxalkyl group, alkylaryl group, each of which has one to thirty carbons atoms, -(A 3 O) h —R c group (wherein A 3 represents an alkylene group having two to four carbon atoms; “h” denotes 1 to 50; and R c represents a straight- or branched-chain alkyl group, alkenyl group, hydroxyalkyl group, and alkylaryl group, each of which has one to thirty carbon atoms), hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or phosphonium (wherein R 8 and R 9 do not simultaneously represents hydrogen atoms, alkali metals, alkaline earth metals, ammoniums or phosphoniums); and “p” and “q” each represent an integer of 1 or more, and the total of “p” and “q” is an integer of 2 or more, and wherein the CH 2 group and CHSO 3 group may be arranged at random or in block); or X 1 is represented by following Formula (C): (wherein R 10 and R 11 are the same as or different from each other and each represent a straight- or branched-chain alkyl group, alkenyl group, hydroxyalkyl group, alkylaryl group, each of which has one to thirty carbon atoms, -(A 4 O) i —R d group (wherein A 4 represents an alkylene group having two to four carbon atoms; “i” denotes 1 to 50; and R d represents a straight- or branched-chain alkyl group, alkenyl group, hydroxyalkyl group, and alkylaryl group, each of which has one to thirty carbon atoms), hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or phosphonium (wherein R 10 and R 11 do not simultaneously represent hydrogen atoms, alkali metals, alkaline earth metals, ammoniums or phosphoniums)); and “m” denotes an integer of 1 or more].