Patent ID: 11898031
Assignee: ECOVANCE CO. LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. A biodegradable polyester resin composition, comprising a polyester resin comprising a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid,
a hydrolysis degree after one week is 35% to 60%, and
a hydrolysis degree after three weeks is 85% or more,
wherein the hydrolysis degree after one week and the hydrolysis degree after three weeks are measured by a measurement method below:
wherein in the measurement method
the hydrolysis degree after one week is a number average molecular weight reduction rate, compared to an initial number average molecular weight of the biodegradable polyester resin composition, of the biodegradable polyester resin composition placed for one week under high-temperature and high-humidity conditions of 80° C. and a relative humidity of 100%, and
the hydrolysis degree after three weeks is a number average molecular weight reduction rate, compared to an initial number average molecular weight of the biodegradable polyester resin composition, of the biodegradable polyester resin composition placed for three weeks under high-temperature and high-humidity conditions of 80° C. and a relative humidity of 100%.