Patent EP-1498442-A2 (EP)
Inventor: WATANABE JUN
IPC: C08K5/00
Filed: 2000-08-04
Abstract: The first aspect of the present invention, referred to as "present
invention III", relates to a polyester block copolymer composition (R)
obtained by thermally-processing a polyester block copolymer composition
(Q) obtained by melt-mixing 100 parts by weight of a polyester block
copolymer (P) with 0.1-5 parts by weight of an epoxy compound (C)
having one or more epoxy groups under an inert gas atmosphere and not
less than 120°C in a solid phase, and further, at a temperature lower than
a melting point of the polyester block copolymer composition (R). 
     The second aspect of the present invention, referred to as "present
invention IV", relates to a polyester block copolymer composition which
comprises thermally-kneading 0.5-5.0 parts by weight of a mono or
morefunctional epoxy compound (C) and 0.01-3.0 parts by weight of a
complex-formable agent for a metal (G) such as an oxalic acid derivative
and a salicylic acid derivative or a hydrazide derivative with 100 parts by
weight of a polyester block copolymer (P1) obtained by a reaction of a
crystalline aromatic polyester (A1) with lactones (B). 
     The third aspect of the present invention, referred to as "present
invention V", relates to a polyester block copolymer composition which
comprises, in obtaining the polyester block copolymer composition by
allowing to react the crystalline aromatic polyester (A1) with lactones (B),
adding and thermally-kneading 0.5-5.0 parts by weight of an epoxy
compound (C) having one or more pieces of epoxy groups (including at
least 0.2 part by weight of two or more functional epoxy compound) and,
optionally, 0-2.0 parts by weight of a carbodiimide compound (E) to 100
parts by weight of a polyester block copolymer (P3) obtained by allowing 
to react 0.1-100% by mol of at least one of a multifunctional compound
(D) having at least three pieces of at least one kind of carboxylic group (i),
hydroxyl group (ii), and/or an ester-formable group therefrom (iii) with
100% by mol of a crystalline aromatic polyester (A1). 
     The fourth aspect of the present invention, referred to as "present
invention VI", relates to a polyester block copolymer composition which
comprises, in obtaining said polyester block copolymer composition by
allowing to react the crystalline aromatic polyester (A1) with lactones (B),
adding and thermally-kneading 0.1-5.0 parts by weight of an epoxy
compound (C) having one or more pieces of epoxy groups and 0-2.0 parts
by weight of a carbodiimide compound (E) to 100 parts by weight of a
polyester block copolymer (P3) obtained by allowing to react 0.1-200% by
mol of at least one of an aliphatic or aromatic multifunctional compound
(D) having at least three pieces of carboxylic group (i), hydroxyl group (ii),
and/or an ester-formable group therefrom (iii) with 100% by mol of a
crystalline aromatic polyester (A1). 
     The fifth aspect of the present invention, referred to as "present
invention VII", relates to a polyester block copolymer composition (R)
which comprises, in obtaining the polyester block copolymer composition
by allowing to react the crystalline aromatic polyester (A1) with lactones
(B), heating a polyester block copolymer composition (Q) at a solid phase,
and the composition (Q) is obtained by adding and thermally-kneading
0.1-5.0 parts by weight of at least one kind of an epoxy compound (C)
having one or more pieces of epoxy groups to 100 parts by weight of a
polyester block copolymer (P) obtained by allowing to react 0.1-200% by
mol of at least one of a multifunctional compound (D) having at least 
three pieces of carboxylic group (i), hydroxyl group (ii), and/or an ester-formable
group therefrom (iii) with 100% by mol of a crystalline aromatic
polyester (A1).