公开(公告)号：JPS6139971B2

公开(公告)日：1986-09-06

申请号：JP3604779

申请日：1979-03-27

Applicant: TORAY INDUSTRIES

Inventor： KUWATA JOSHIN ,  ODAJIMA AKIO ,  INOE SHUNEI

IPC: C08G63/00 ,  C08G63/64 ,  C08G63/78 ,  D01F6/62 ,  D01F6/92

公开(公告)号：JPS55127431A

公开(公告)日：1980-10-02

申请号：JP3604779

申请日：1979-03-27

Applicant: TORAY INDUSTRIES

Inventor： KUWATA JIYOUSHIN ,  ODAJIMA AKIO ,  INOUE SHIYUNEI

IPC: C08G63/00 ,  C08G63/64 ,  C08G63/78 ,  D01F6/62 ,  D01F6/92

Abstract: PURPOSE:To obtain polyester which has good brihtness and transparency and forms fiber easily, by a method wherein terephthalic acid contg. p-formylbenzoic acid is esterified with ethylene glycol, then a phosphorus cpd., a cobalt cpd. and inorg. particles are added to the reaction mixt. and the resulting mixt. is subjected to polycondensation. CONSTITUTION:(A) Dicarboxylic acids consisting mainly of terephthalic acid contg. 100-1000ppm of p-formylbenzoic acid are esterified with (B) glycols consisting mainly of ethylene glycol until an esterification rate of not less than 95% is obtained. To the reaction mixt. are added (C) a phosphorus cpd, a cobalt cpd and inorg. particles having an average particle diameter of not more than 5mu and a refractive index of 1.40-1.70 in an amount determined by the formula I,II and III [wherein (P), (Co) are amounts added (based on each R atom) (ppm vs polymer), (FBA) is p-formylbenzoic acid content in terephthalic acid (ppm vs terephthalic acid), (Par) is amount of inorg, particles added (ppm vs polymer)]. The resulting mixt. is subjected to polycondensation to produce polyester.

公开(公告)号：JPS54124098A

公开(公告)日：1979-09-26

申请号：JP3110878

申请日：1978-03-20

Applicant: TORAY INDUSTRIES

Inventor： ODAJIMA AKIO ,  SUZUKI MASARU ,  MINAMI TOMOYUKI

IPC: C08L67/00 ,  C08G63/00 ,  C08G63/78

Abstract: PURPOSE:To prepare a polyester useful as magnetic tape base, microfilm, metallized film, etc. and giving excellent slipperiness and fineness of surface flatness, by adding an ethylene glycol slurry of inactive inorganic particles, prepared by dispersing with stirring under specific conditions. CONSTITUTION:Inactive inorganic particles, e.g. silica, etc., having =4,000 and a heat evolution due to shear of >=50 deg.C. The slurry is added to the reaction system of terephthalic acid (derivative) and ethylene glycol, and the polymerization is carried out to give the desired polyester.