Title:
FILM FORMED FROM POLYESTER HAVING URETHANE LINKAGE
Document Type and Number:
Japanese Patent JPH05140286
Kind Code:
A
Abstract:
PURPOSE:To provide a film having a mol.wt. high enough for practical use and excellent in tensile strength and flexibility. CONSTITUTION:100 pts.wt. molten crystalline polyester having an m.p. of 60 deg.C or higher and a number-average mol.wt. of 5,000 or higher and prepd. by reacting 1,4-butanediol with an acid mixture comprising 60-99mol% succinic acid and 1-40mol% sebacic acid is reacted with 0.1-5 pts.wt. diisocyanate above the m.p. of the polyester to give a polyester having a number-average mol.wt. of 10,000 or higher and at least two urethane linkages in the molecule, which is formed into a film.
Inventors:
TAKIYAMA EIICHIRO
FUJIMAKI TAKASHI
NIIKURA ISAMU
HATANO YOSHITAKA
FUJIMAKI TAKASHI
NIIKURA ISAMU
HATANO YOSHITAKA
Application Number:
JP33436791A
Publication Date:
June 08, 1993
Filing Date:
November 22, 1991
Export Citation:
Assignee:
SHOWA HIGHPOLYMER
International Classes:
B29C55/02; C08G18/42; C08G63/685; C08G63/91; C08J5/18; C08L67/00; B29K67/00; B29L7/00; (IPC1-7): B29C55/02; B29K67/00; B29L7/00; C08G18/42; C08G63/685; C08G63/91; C08J5/18; C08L67/00
Attorney, Agent or Firm:
Yaguchi flat
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