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1. (WO1997017391) PROCESS FOR PRODUCING POLYETHYLENE NAPHTHALATE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/017391 International Application No.: PCT/JP1996/003116
Publication Date: 15.05.1997 International Filing Date: 25.10.1996
IPC:
C08G 63/189 (2006.01) ,C08G 63/78 (2006.01) ,C08G 63/82 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
63
Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
02
Polyesters derived from hydroxy carboxylic acids or from polycarboxylic acids and polyhydroxy compounds
12
derived from polycarboxylic acids and polyhydroxy compounds
16
Dicarboxylic acids and dihydroxy compounds
18
the acids or hydroxy compounds containing carbocyclic rings
181
Acids containing aromatic rings
185
containing two or more aromatic rings
187
containing condensed aromatic rings
189
containing a naphthalene ring
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
63
Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
78
Preparation processes
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
63
Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
78
Preparation processes
82
characterised by the catalyst used
Applicants:
MITSUI PETROCHEMICAL INDUSTRIES, LTD. [JP/JP]; 2-5, Kasumigaseki 3-chome Chiyoda-ku Tokyo 100, JP (AllExceptUS)
IWASAKI, Hiroshi [JP/JP]; JP (UsOnly)
ISHIBASHI, Masayasu [JP/JP]; JP (UsOnly)
UEKI, Hiromi [JP/JP]; JP (UsOnly)
HIRAOKA, Shoji [JP/JP]; JP (UsOnly)
MATSUYOSHI, Toru [JP/JP]; JP (UsOnly)
INOKI, Satoshi [JP/JP]; JP (UsOnly)
Inventors:
IWASAKI, Hiroshi; JP
ISHIBASHI, Masayasu; JP
UEKI, Hiromi; JP
HIRAOKA, Shoji; JP
MATSUYOSHI, Toru; JP
INOKI, Satoshi; JP
Agent:
SUZUKI, Shunichiro; Suzuki & Associates 13-6, Nishigotanda 7-chome Shinagawa-ku Tokyo 141, JP
Priority Data:
7/29310210.11.1995JP
8/23662506.09.1996JP
8/23662606.09.1996JP
Title (EN) PROCESS FOR PRODUCING POLYETHYLENE NAPHTHALATE
(FR) PROCEDE DE PRODUCTION DE NAPHTALATE DE POLYETHYLENE
Abstract:
(EN) In the production of polyethylene naphthalate of the present invention, the esterification reaction between naphthalenedicarboxylic acid and ethylene glycol is conducted while causing water to be present in a reaction system from a start of reaction, in the presence of at least one catalyst selected from the group consisting of nitric, carboxylic, phosphoric and hydrogenphosphoric salts and amines according to necessity, to thereby attain an esterification ratio of 45 to 80 %, so that a liquid mixture of naphthalenedicarboxylic acid esterification reaction products containing naphthalenedicarboxylic acid, carboxyl-hydroxyethoxycarbonylnaphthalene and bis(hydroxyethoxycarbonyl)naphthalene is obtained. Subsequently, a crystal is separated from this liquid mixture to thereby obtain a mixture of esterification reaction products. Thereafter, this mixture having ethylene glycol added thereto according to necessity is subjected to polycondensation. The polyethylene naphthalate obtained by the process of the present invention ensures a low content of naphthalenedicarboxylic acid esters each having diethylene glycol skeleton therein, thereby having excellent quality, for example, in appearance.
(FR) Dans la production de naphtalate de polyéthylène selon la présente invention, la réaction d'estérification entre l'acide naphtalènedicarboxylique et l'éthylèneglycol est exécutée en présence d'eau dès le début dans un système de réaction et en présence d'au moins un catalyseur choisi dans le groupe constitué par des sels et des amines azotiques, carboxyliques, phosphoriques et hydrophosphoriques en fonction des nécessités pour atteindre ainsi un taux d'estérification de 45 à 80 %, de telle sorte que l'on obtient un mélange liquide de produits de réaction de l'estérification de l'acide naphtalènedicarboxylique, qui comportent cet acide, du carboxylhydroxyéthoxycarbonylnaphtalène et du bis(hydroxyéthoxycarbonyl)naphtalène. Ensuite, on sépare un cristal de ce mélange liquide pour obtenir un mélange de produits de réaction de l'estérification. Après cela, on ajoute à ce mélange de l'éthylèneglycol en fonction des besoins et on lui fait subir une polycondensation. Le naphtalate de polyéthylène obtenu avec le procédé selon la demande assure une faible teneur en esters d'acide naphtalènedicarboxylique, chacun d'eux comportant un squelette de diéthylèneglycol, ce qui leur confère une excellente qualité, par exemple, en ce qui concerne leur aspect.
Designated States: CA, JP, KR, US
European Patent Office (DE, FR, GB, IT, NL)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0802938US5811513JPH10511138CA2209994KR1019980701284