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公开(公告)号:US5527875A
公开(公告)日:1996-06-18
申请号:US386268
申请日:1995-02-09
CPC分类号: C08G64/307
摘要: A process for producing an aromatic polycarbonate having a weight average molecular weight of from 7,000 to 60,000 is disclosed, comprising melt polycondensing an aromatic diol compound (e.g., bisphenol A) and a diaryl carbonate compound (e.g., diphenyl carbonate) in the presence of a combination of (a) an alkali metal compound and (b) a phosphonium hydroxide compound (e.g., tetraethylphosphonium hydroxide) as an interesterification catalyst. The aromatic polycarbonate has improved heat resistance and hue.
摘要翻译: 公开了一种重均分子量为7,000至60,000的芳族聚碳酸酯的制备方法,其包括将芳族二醇化合物(例如双酚A)和碳酸二芳基酯化合物(例如碳酸二苯酯)熔融缩聚在 (a)碱金属化合物和(b)氢氧化鏻化合物(例如氢氧化四乙基鏻)作为酯交换催化剂的组合。 芳族聚碳酸酯具有改善的耐热性和色调。
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公开(公告)号:US06765070B2
公开(公告)日:2004-07-20
申请号:US10140186
申请日:2002-05-08
申请人: Koichi Tamura , Fumio Keitoku , Toshio Kanbe , Yasuhiro Tomita
发明人: Koichi Tamura , Fumio Keitoku , Toshio Kanbe , Yasuhiro Tomita
IPC分类号: C08L6702
CPC分类号: C08J5/18 , C08G63/183 , C08J2367/02 , C08L67/02 , C08L67/025 , C08L2666/18
摘要: A copolymerized polyester resin composition comprising the following polyethylene terephthalate resin (A) and a polybutylene terephthalate resin (B), wherein the proportion of the resin (A) is from 50 to 95 wt %, and the proportion of the resin (B) is from 5 to 50 wt %, based on the total amount of the resins (A) and (B): Resin (A): a copolymerized polyethylene terephthalate resin, having a dicarboxylic acid component containing terephthalic acid as the main component and a diol component containing ethylene glycol as the main component copolymerized, wherein the dicarboxylic acid component contains isophthalic acid in an amount of from 3 to 30 mol % based on the total dicarboxylic acid component, and the diol component contains a cyclohexane dimethanol in an amount of from 3 to 40 mol % based on the total diol component.
摘要翻译: 包含以下聚对苯二甲酸乙二醇酯树脂(A)和聚对苯二甲酸丁二醇酯树脂(B)的共聚聚酯树脂组合物,其中树脂(A)的比例为50-95重量%,树脂(B)的比例为 5〜50重量%,基于树脂(A)和(B)的总量:树脂(A):具有含有对苯二甲酸作为主要成分的二羧酸成分的共聚聚对苯二甲酸乙二醇酯树脂和二醇成分 含有乙二醇作为主要成分的共聚物,其中二羧酸成分含有相对于总二羧酸成分为3〜30摩尔%的间苯二甲酸,二醇成分为环己烷二甲醇的3〜 基于总二醇组分为40摩尔%。
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公开(公告)号:US06239249B1
公开(公告)日:2001-05-29
申请号:US09510671
申请日:2000-02-22
申请人: Fumio Keitoku , Hisashi Kimura , Toshio Kanbe , Koichi Ikeyama
发明人: Fumio Keitoku , Hisashi Kimura , Toshio Kanbe , Koichi Ikeyama
IPC分类号: C08G6302
CPC分类号: C08G63/78 , C08G63/672
摘要: A method for producing a copolymerized polyester resin, which comprises subjecting a dicarboxylic acid component containing terephthalic acid or its ester derivative as the main component and a phenylene dioxydiacetic acid as a copolymerizable component, and a diol component containing ethylene glycol as the main component, to polycondensation through an esterification reaction or a transesterification reaction, wherein the phenylene dioxydiacetic acid is added to the reaction system in the form of a solution dissolved in the diol component.
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