发明名称 |
MODIFIED POLYESTER USEFUL AS PHOTOGRAPHIC ROLL FILM SUPPORT |
摘要 |
A copolyester is synthesized by reacting a dialkyl ester of an aromatic dicarboxylic acid (e.g., dimethyl terephthalate) with ethylene glycol, low molecular weight poly(ethylene glycol) and a salt of a sulfonic acid-substituted aromatic dicarboxylate (e.g., sodium sulfoisophthalic acid) simultaneously in a first stage reaction in the presence of a phosphite or phosphate stabilizer. The intermediate product of the first stage is further reacted in a second stage in the presence of a polycondensation catalyst to obtain a random copolyester of the desired molecular weight. The copolyester is extruded to form a film which, after orientation and heat setting, has excellent clarity and is useful as a photographic film support. Aqueous processing of the film relaxes any core set or curl.
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申请公布号 |
US5138024(A) |
申请公布日期 |
1992.08.11 |
申请号 |
US19910645945 |
申请日期 |
1991.01.25 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
BROZEK, CARL T.;DALY, ROBERT C.;FEHNEL, ROBERT H.;PETROPOULOS, CONSTANTINE C. |
分类号 |
B29C55/12;B29K67/00;C08G63/181;C08G63/688;C08G63/78;C08J5/18;C08K5/524;C08K5/527;C08L67/00;C08L67/02;G03C1/795 |
主分类号 |
B29C55/12 |
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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