Patent TW-585880-B (TW)
Title: Process for producing polyester block copolymer
Inventor: KOTANI KAZUYA
IPC: H05B3/56
Filed: 2000-08-02
Granted: 2004-05-01
Abstract: The present invention I relates to a process for producing a polyester block copolymer (P1) by reacting A% by weight of a crystalline aromatic polyester with B% by weight of a lactone to give 100% by weight (A+B=100) of a polyester block copolymer (P1), wherein with respect to A% by weight of a crystalline aromatic polyester, (B+0.5)% by weight of the lactone is added, and with respect to 100% by weight of the polyester block copolymer (P1) after the reaction, more than 0.5% by weight of an unreacted lactone is added. The present invention II relates to a process for producing a high-molecular weight polyester block copolymer (P'1), characterized by reacting a polyester block copolymer (P1) in liquid state. The present invention III relates to a polyester block copolymer composition (R) obtained by melting and mixing 100 parts by weight of a polyester block copolymer (P) with 0.1 to 5 parts by weight of an epoxy compound having at least one epoxy group within the molecule, and the resulting polyester block copolymer composition (Q) is treated by heat under an inert atmosphere in solid phase at a temperature not less than 120 DEG C and not more than the melting point of the obtained polyester block copolymer composition (R). The present invention IV relates to a polyester block copolymer composition obtained by heating and kneading 0.5 to 5.0 parts by weight of an epoxy compound having one or more functionalities and 0.01 to 3.0 parts by weight of metal complexing agent (G) of oxalic acid derivatives, salicylic acid derivatives, hydrazides or the like based on 100 parts by weight of a polyester block copolymer (P1) obtained by reacting (A1) a crystalline aromatic polyester with (B) a lactone. The present invention V relates to a polyester block copolymer composition, wherein while a polyester block copolymer is obtained by reacting (A1) a crystalline aromatic polyester with (B) a lactone, 0.1 to 100% by mole of a multi-functional compound (D) having more than three in total one or two of (i) carboxyl groups, (ii) hydroxyl groups and (iii) ester-forming groups thereof based on 100% by mole of the crystalline aromatic polyester (A1) is added, 0.5 to 5.0 parts by weight of one or more functional epoxy compound (C) (but containing 0.2 parts by weight of two or more functional epoxy compound) based on 100% by mole of the polyester block copolymer (P3) is added, and, if necessary, 0 to 2.0 parts by weight of a carbodiimide compound (E) is added, heated and kneaded to give the polyester block copolymer composition. The present invention VI relates to a polyester block copolymer composition, wherein while a polyester block copolymer is obtained by reacting (A1) a crystalline aromatic polyester with (B) a lactone, 0.1 to 200% by mole of at least one of aliphatic and aromatic multi-functional compounds (D) having more than three in total within the molecule one or two of (i) carboxyl groups, (ii) hydroxyl groups and/or (iii) ester-forming groups thereof based on 100% by mole of the crystalline aromatic polyester (A1) is added, 0.1 to 5.0 parts by weight of at least one of a one or more functional epoxy compound (C) based on 100% by mole of the polyester block copolymer (P3) is added, and 0 to 2.0 parts by weight of a carbodiimide compound (E) is added, heated and kneaded to give the polyester block copolymer composition. The present invention VII relates to a polyester block copolymer composition (R), wherein while a polyester block copolymer is obtained by reacting (A1) a crystalline aromatic polyester with (B) a lactone, 0.1 to 200% by mole of at least one of multi-functional compounds (D) having more than three in the molecule in total one or two of (i) carboxyl groups, (ii) hydroxyl groups and/or (iii) ester-forming groups thereof based on 100% by mole of the crystalline aromatic polyester (A1) is added, 0.1 to 5.0 parts by weight of at least one of a one or more functional epoxy compound (C) based on 100% by mole of the polyester block copolymer (P) is added, melted and mixed, the resulting polyester block copolymer composition (Q) being heated in solid state to give the polyester block copolymer composition (R).