Malic Acid → Malic Acid

Participants

Reaction Steps

As a result of production of a polyester in the same manner as in Example 1-A except that 100.3 g (0.85 mol) of succinic acid, 80.4 g (0.89 mol) of 1,4-butanediol, 0.37 g (2.8×10−3 mol) of malic acid, and 1.34 g (2.8×10−3 mol, 0.64 mol % relative to succinic acid as a whole) of 27.7% by weight of an aqueous malic acid solution in which germanium dioxide as a catalyst had been dissolved in an amount of 4% by weight beforehand were added at the feed of the starting materials in Example 1-A, a polyester having a reduced viscosity (ηsp/C) of 2.8 was obtained. The polymerization reaction time under reduced pressure of 0.07×103 Pa was 1.5 hours. The amount of the terminal carboxyl group was 22 eq/ton, the amount of the terminal OH group was 60 eq/ton, and the contents of a carbonate bond, a urethane bond, an aliphatic monooxymonocarboxylic acid unit, and a phosphorus atom derived from a phosphorus-containing compound were each 0.

Provenance & Evidence