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    • 4. 发明授权
    • Process for producing pet articles with low acetaldehyde
    • 用于生产低乙醛的宠物用品的方法
    • US6099778A
    • 2000-08-08
    • US956670
    • 1997-10-23
    • Gregory Wayne NelsonVincent Alvin NicelySam Richard Turner
    • Gregory Wayne NelsonVincent Alvin NicelySam Richard Turner
    • C08L67/00C08G63/88C08L67/02B28B3/20C08F6/00C08F20/00
    • C08L67/02C08G63/88B29K2105/0002C08L77/00Y10S264/64
    • The present invention discloses a process for producing molded, shaped or extruded articles comprising the steps of:a) melt reacting, in the presence of a catalyst which is substantially free of Co compounds, at least one glycol and at least one dicarboxylic acid to form a polyester having an I.V. of at least about 0.5 dL/g, wherein said at least one glycol is selected from the group consisting of glycols having up to 10 carbon atoms and mixtures thereof and said dicarboxylic is selected from the group consisting of alkyl dicarboxylic acids having 2 to 16 carbon atoms, aryl dicarboxylic acids having 8 to 16 carbon atoms and mixtures thereof;b) adding an acetaldehyde reducing additive to said polyester to form a reduced acetaldehyde polyester; andc) forming said reduced acetaldehyde polyester into articles directly from step b.Thus, the present invention provides a process for directly producing from the melt article having extremely low acetaldehyde content.
    • 本发明公开了一种生产模塑,成型或挤出制品的方法,包括以下步骤:a)在基本上不含Co化合物的催化剂存在下熔融反应至少一种二醇和至少一种二羧酸形成 具有IV的聚酯 至少约0.5dL / g,其中所述至少一种二醇选自具有至多10个碳原子的二醇及其混合物,并且所述二羧酸选自具有2至16个碳原子的烷基二羧酸 8-18个碳原子的芳基二羧酸及其混合物; b)向所述聚酯中加入乙醛还原添加剂以形成还原乙醛聚酯; 和c)直接从步骤b将所述还原的乙醛聚酯制成制品。 因此,本发明提供了由具有极低乙醛含量的熔融制品直接生产的方法。