公开(公告)号：US3842043A

公开(公告)日：1974-10-15

申请号：US34099673

申请日：1973-03-14

Applicant: MITSUBISHI RAYON CO

Inventor： CHIMURA K ,  KAWASHIMA M ,  ITO K ,  TAKASHIMA S

IPC: C08G63/83 ,  C08G63/86 ,  C08G17/015

CPC classification number: C08G63/863 ,  C08G63/83

Abstract: 1. A PROCESS FOR PREPARING POLYESTERS COMPRISING POLYCONDENSING AT LEAST ONE GLYCOL TEREPHTHALATE IN THE PRESENCE OF APOLYCONDENSATION CATALYST WHICH IS PREPARED BY DISSOLVING GERMANIUM DIOXIDE IN A GLYCOL SOLVENT IN THE PRESENCE OF A SOLUBILIZING AGENT SELECTED FROM THE GROUP CONSISTING IF CALCIUM, MAGNESIUM, STRONTIUM AND ZINC, AND FORMATES, ACETATES, BENZOATES, LINEAR POLYPHOSPHATES, CITRATES, OXALATES, METHOXIDES, ETHOXIDES, PROPOXIDES, BUTOXIDE AND ETHYLENE GLYCOXIDES OF THE ABOVEMENTIONED METALS, IN A RATIO OF 0.25 TO 2.0 ATOMS OF THE SOLUBILIZING AGENT METAL PER ATOM OF GERMANIUM.

公开(公告)号：US3796691A

公开(公告)日：1974-03-12

申请号：US3796691D

申请日：1971-09-23

Applicant: MITSUBISHI RAYON CO

Inventor： CHIMURA K ,  TAKASHIMA S ,  KAWASHIMA M

IPC: C08G63/00 ,  C08G63/78 ,  C08G63/82 ,  C08G63/85 ,  C08G63/86 ,  C08G63/87 ,  C08K5/57 ,  D01F6/62 ,  C08G17/015

CPC classification number: C08G63/87 ,  C08G63/85 ,  C08G63/866 ,  C08K5/57 ,  C08L67/02

Abstract: AN IMPROVED PROCESS FOR PRODUCING A LINEAR POLYESTER WHEREIN POLYCONDENSATION OF GLYCOL TEREPHTHALATE IS PER FORMED IN THE PRESENCE OF (1) A TRIVALENT ANTIMONY COMPOUND, (2) A PHOSPHORUS COMPOUND AND (3) AN ORGANOTI COMPOUND IN THE PROPORTIONS SATISFYING THE FOLLOWING ATOMIC RATIOS; SN/SB$0.2 AND P/SN$1. THE RESULTANT POLYESTER EXHIBITS EXCELLENT WHITENESS AND TRANSPARENCY AND THEREFORE, IS PARTICULARLY USEFUL FOR A TEXTILE FIBER AND FILM.