Process for treating the surface of polyacetal resin
    2.
    发明授权
    Process for treating the surface of polyacetal resin 失效
    聚缩醛树脂表面处理方法

    公开(公告)号:US4418162A

    公开(公告)日:1983-11-29

    申请号:US339454

    申请日:1981-12-28

    IPC分类号: C08J7/14 C23C18/24 C08K9/04

    CPC分类号: C23C18/24

    摘要: A method for the surface treatment of polyacetal resin characterized in that the resin is treated with an acidic solution containing chloride ions and sulfuric acid ions can activate the surface so that the shaped article can be easily plated.

    摘要翻译: PCT No.PCT / JP81 / 00101 Sec。 371日期:1981年12月28日 102(e)1981年12月28日PCT申请1981年4月30日PCT公布。 公开号WO81 / 03178 日本1981年11月12日。一种聚缩醛树脂的表面处理方法,其特征在于,用含有氯离子的酸性溶液处理树脂,硫酸离子可以活化表面,使得成型制品能够容易地镀覆。

    Thermoplastic polyester composition
    6.
    发明授权
    Thermoplastic polyester composition 失效
    热塑性聚酯组合物

    公开(公告)号:US4436877A

    公开(公告)日:1984-03-13

    申请号:US440132

    申请日:1982-11-08

    CPC分类号: C08K5/3445 C08L67/02

    摘要: A thermoplastic polyester composition comprising a thermoplastic polyester resin containing a moiety derived from an aromatic dibasic acid, as a predominant acid moiety and a hydantoin compound in an amount sufficient to substantially retard evolution of aromatic dibasic acid vapor during melt processing of the composition. A method of preventing mold deposits during a molding operation of a thermoplastic polyester resin containing an aromatic dibasic acid as a predominant acid moiety comprising the addition of 0.01 to 10 parts by weight of a hydantoin compound per 100 parts by weight of the polyester resin. The aromatic dibasic acid is preferably terephthalic acid and the thermoplastic polyester resin is preferably selected from the group of polyethylene terephthalate, polytrimethylene terephthalate, polytetramethylene terephthalate and blends thereof.

    摘要翻译: 一种热塑性聚酯组合物,其包含含有衍生自芳族二元酸的部分作为主要酸部分的热塑性聚酯树脂和乙内酰脲化合物,其量足以在组合物的熔融加工期间基本上延缓芳族二元酸蒸气的逸出。 一种在含有芳族二元酸作为主要酸性部分的热塑性聚酯树脂的模塑操作期间防止模具沉积的方法,包括每100重量份聚酯树脂添加0.01至10重量份的乙内酰脲化合物。 芳族二元酸优选为对苯二甲酸,热塑性聚酯树脂优选选自聚对苯二甲酸乙二醇酯,聚对苯二甲酸亚丙酯,聚对苯二甲酸丁二醇酯及其共混物。

    Process for manufacturing polytetramethylene terephthalate
    9.
    发明授权
    Process for manufacturing polytetramethylene terephthalate 失效
    聚对苯二甲酸丁二醇酯的制备方法

    公开(公告)号:US4511708A

    公开(公告)日:1985-04-16

    申请号:US575414

    申请日:1984-01-31

    CPC分类号: C08G63/78 C08G63/183

    摘要: Polytetramethylene terephthalate is manufactured from terephthalic acid and 1,4-butanediol in two stages, a first stage comprising an esterification reaction employing an esterification catalyst and a second stage comprising a condensation-polymerization reaction. The esterification reaction is carried out in the presence of at least one acid amide compound, preferably selected from urea, a derivative thereof, mono- or poly-carboxylic acid amides having 1 to 9 carbon atoms, polyamides, phosphoric acid amides and sulfonic acid amides, whereby the production of tetrahydrofuran as a by-product is appreciably inhibited and the time required for the esterification reaction is reduced.

    摘要翻译: 聚对苯二甲酸丁二醇酯由对苯二甲酸和1,4-丁二醇分两阶段制造,第一阶段包括使用酯化催化剂的酯化反应和包含缩聚反应的第二阶段。 酯化反应在至少一种酸酰胺化合物,优选选自脲,其衍生物,具有1至9个碳原子的一元或多元羧酸酰胺,聚酰胺,磷酸酰胺和磺酸酰胺的存在下进行 ,由此副产物中的四氢呋喃的产生受到明显的抑制,并且酯化反应所需的时间降低。