Patent ID: 11879051
Assignee: NISSHINBO CHEMICAL INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A polyester resin composition comprising:
a polyester resin (A); and
a carbodiimide compound (B) represented by the following general formula (1),
wherein a content of the carbodiimide compound (B) is 0.1 to 5 parts by mass relative to a total of 100 parts by mass of the polyester resin (A) and the carbodiimide compound (B),, wherein R1 and R3 represent a residue of an organic compound having one isocyanate group-reactive functional group but excluding the isocyanate group-reactive functional group,
R1 and R3 may be the same as or different from each other,
R2 represents a divalent residue of a diisocyanate compound having two isocyanate groups removed therefrom,
R2 has a benzene aromatic ring directly bonded to an NCN group, and has no substituent group or only one substituent group at each of both ortho positions to a position bonded to the NCN group, of the benzene aromatic ring,
X1 and X2 represent a group formed by a reaction between the functional group of the organic compound and the isocyanate group of the diisocyanate compound, and X1 and X2 may be the same as or different from each other,
n represents a number of 1 to 15,
wherein the diisocyanate compound comprises a mixture of 2,4′-diphenylmethane diisocyanate and 4,4′-diphenylmethane diisocyanate,
a proportion of the 2,4′-diphenylmethane diisocyanate is 30 to 70 mol % and a proportion of the 4,4′-diphenylmethane diisocyanate is 30 to 70 mol % based on 100 mol % of the whole diisocyanate compound,
the equivalent of carbodiimide of the carbodiimide compound (B) (chemical formula weight per 1 mol of carbodiimide groups) is 200 to 1,500, and
the polyester resin (A) is one or more selected from the group consisting of polybutylene succinate, polylactic acid, and polyhydroxyalkanoic acid.