Takasago International Corporation

Seiichi Abe

Yoji Hori

Minoru Hanada

Hideyuki Hongo

Yasuo Fujiwara

A perfume-containing controlled release biodegradable resin composition which can release aroma of the included perfume gradually without changing its perfume tone and can be used in such applications as deodorants, etc. The resin composition includes a biodegradable resin which is a random or block copolymer polyester represented by the following formula (1): ##STR1## wherein R.sup.1 is a hydrocarbon radical having 1 to 15 carbon atoms, which is a divalent organic group that may be have a double bond or an oxygen atom but does not have a group represented by the formula ##STR2## wherein the symbol '*' is an asymmetric carbon atom. Each of m and n is 0 or an integer of 100 to 9,000, provided that m+n is within the range of 200 to 10,000. The molar ratio of the structural units [I] and [II] is 1-99:99-1 when m and n are not 0 and the number average molecular weight is 5,000 to 1,000,000, and a perfume such as a cyclic ether, a natural plant perfume, etc., is held in the biodegradable resin.

Growing community of inventors

Kanagawa, Japan

Seiichi Abe