Patent EP-1120432-A1 (EP)
Inventor: WATANABE JUN
IPC: C08K5/09
Filed: 2000-08-04
Abstract: The present invention I relates to a method for the
preparation of a polyester block copolymer (P1) characterized in
that in the method for the preparation of 100% by weight of the
polyester block copolymer (P1) by allowing to react A% by weight of
a crystalline aromatic polyester with B% by weight of lactones
(A+B=100), (B+0.5)% by weight of lactones are added into A% by
weight of a crystalline aromatic polyester, and not less than 0.5%
by weight of unreacted lactones are remained with respect to 100%
by weight of the polyester block copolymer (P1) after reaction. 
     The present invention II relates to a method for the
preparation of a polyester block copolymer (P'1) having a high
molecular weight characterized in that the polyester block
copolymer (P1) is allowed to further react in a solid phase. 
     The 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 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 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 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 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).