METHOD FOR PURIFYING ALIPHATIC POLYESTER AND ALIPHATIC POLYESTER PURIFIED WITH SAID METHOD
申请人:MUSASHINO CHEMICAL LABORATORY, LTD.
公开号:US20160083507A1
公开(公告)日:2016-03-24
Provided is a method for purifying an aliphatic polyester which reduces coloring of the aliphatic polyester, reduces the amount of residual monomer and residual catalyst, and improves stability and appearance. This method for purifying an aliphatic polyester subjects an aliphatic polyester containing a monomer to heat treatment under dry air containing oxygen at a temperature at or above the melting point of the monomer and at or below the melting point of the aliphatic polyester.