Patent ID: 8969507
Filing Date: 2015-03-03
Classification: B01J,C08G

Abstract:
1. A method of producing an aliphatic polyester resin, comprising continuously reacting the units represented by formula (1); formula (2); at least one of formula (3) and formula (4); and at least one of formula (5), formula (6), and formula (7) in plural continuous reaction tanks, wherein said continuously reacting comprises esterifying and melt polycondensing, wherein said aliphatic dicarboxylic acid represented by formula (1) and said aliphatic diol represented by formula (2) are comprised as main components, a reduced viscosity at 30° C. of the aliphatic polyester resin is from 1.6 to 3 dL/g, and wherein: wherein R 1 represents an aliphatic saturated hydrocarbon group having from 0 to 40 carbon atoms, wherein R 2 represents an aliphatic hydrocarbon group having from 2 to 10 carbon atoms, wherein R 3 represents an aliphatic hydrocarbon group having from 1 to 20 carbon atoms, wherein R 4 represents an aliphatic hydrocarbon group having from 1 to 20 carbon atoms, wherein R 5 represents an aliphatic hydrocarbon group having from 2 to 20 carbon atoms, having at least one double bond, wherein the formula (6) and the formula (7) are geometric isomers regarding double bond, the formula (6) represents a trans form and the formula (7) represents a cis form, r and s each independently are an integer of from 0 to 17, R wherein the total amount of units represented by the formula (3), the formula (4), the formula (5), the formula (6) and the formula (7) is from 0.0010 to 0.50 mol % to 100 mol % of the total amount of all units in the aliphatic polyester resin; and wherein the total of the units represented by the formula (3) and the formula (4) is from 1.0 to 7.0 in terms of molar ratio to the total of the units represented by the formula (5), the formula (6) and the formula (7).