发明名称 |
Process for Manufacturing Polyethylene Terephthalate |
摘要 |
The invention relates to a process for producing a polyester resin, said process comprises the steps of
(i) providing a mixture of terephthalic acid, monoethylene glycol, a polycondensation catalyst which contains antimony, a phosphorous containing stabilizer comprising a compound of the formula (I)
and optionally a colour correction additive containing cobalt ions;
(ii) heating said mixture to a temperature of 220 to 270°C to provide bis-hydroxyethylterephthalic acid ester; and
(iii) performing polycondensation of said bis-hydroxyethylterephthalic acid ester at a temperature of between 280 and 310°C at reduced pressure. |
申请公布号 |
EP2749584(A1) |
申请公布日期 |
2014.07.02 |
申请号 |
EP20120008668 |
申请日期 |
2012.12.29 |
申请人 |
CLARIANT FINANCE (BVI) LIMITED |
发明人 |
DONGIOVANNI, ERNESTO;SUPAT, KORADA |
分类号 |
C08G63/00;B01J23/00;C08G63/78;C08K5/49 |
主分类号 |
C08G63/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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