Process for recycling polyolefin cross-linked substance or polyolefin
foamed substance
    5.
    发明授权
    Process for recycling polyolefin cross-linked substance or polyolefin foamed substance 失效
    回收聚烯烃交联物质或聚烯烃发泡物质的方法

    公开(公告)号:US6090862A

    公开(公告)日:2000-07-18

    申请号:US927185

    申请日:1997-09-11

    摘要: A process is developed for recycling a polyolefin cross-linked substance having a cross-linkage, a polyolefin foamed substance free from a cross-linkage or a polyolefin foamed substance having a cross-linkage. The process includes the step of heating the polyolefin cross-linked substance together with a cross-linkage breaking agent, whereby breaking the cross-linkage to recycle the polyolefin cross-linked substance into a moldable thermoplastic resin. Further, the process includes the step of adding a foaming-agent-decomposition facilitating agent to the polyolefin foamed substance in the course of thermally melting the polyolefin foamed substance, whereby decomposing a residual foaming agent remaining in the polyolefin foamed substance. Furthermore, the process includes the step of adding a foaming-agent-decomposition facilitating agent to the polyolefin foamed substance in the course of heating the polyolefin foamed substance to break the cross-linkage, whereby decomposing a residual foaming agent remaining in the polyolefin foamed substance. The resulting recycled product is improved in terms of moldability, strength, elongation and superficial appearance.

    摘要翻译: 开发了一种用于回收具有交联键的聚烯烃交联物质,不含交联的聚烯烃发泡物质或具有交联键的聚烯烃发泡物质的方法。 该方法包括与交联破坏剂一起加热聚烯烃交联物质的步骤,由此破坏交联以将聚烯烃交联物质再循环到可模制热塑性树脂中。 此外,该方法包括在热熔聚烯烃发泡物质的过程中向聚烯烃发泡物质中加入发泡剂分解促进剂的步骤,从而分解留在聚烯烃发泡物质中的残余发泡剂。 此外,该方法包括在加热聚烯烃发泡物质的过程中向聚烯烃发泡物质添加发泡剂分解促进剂以破坏交联的步骤,从而分解留在聚烯烃发泡物质中的残留发泡剂 。 所得到的再生产品在成型性,强度,伸长率和表面外观方面得到改善。

    Heat resistant herapathite and process for producing the same
    8.
    发明授权
    Heat resistant herapathite and process for producing the same 失效
    耐热的天冬氨酸钙及其制备方法

    公开(公告)号:US5368780A

    公开(公告)日:1994-11-29

    申请号:US791718

    申请日:1991-11-14

    CPC分类号: G02F1/172 C30B29/54 C30B7/00

    摘要: A herapathite has a capillary crystal form in which its iodine atoms are oriented in a major axis direction of the capillary crystal form. The herapathite obtained is expressed by a chemical formula, xC.sub.20 H.sub.24 N.sub.2 O.sub.2.yH.sub.2 SO.sub.4.zHI.sub.3, in which a ratio of a number of the sulfuric acid molecules (y) with respect to a number of the iodine atoms (3z), i.e., (y/3z), is less than 0.5. The production process includes a reaction step, a first separating step, a recrystallizing step and a second separating step. A solvent used in the recrystallizing step is at least one of water and alcohol. A mixing weight ratio of water with respect to alcohol of the solvent is more than 50/50 or less than 10/90. The herapathite does not degrade even after it is heated up to 130.degree. C., and it is applicable to an automobile light shielding glass which should show a high transparency when a voltage is applied thereto.

    摘要翻译: 天麻石具有毛细晶体形式,其中碘原子沿毛细晶体形式的长轴方向取向。 所得到的噻草精由化学式xC20H24N2O2.yH2SO4z33表示,其中硫酸分子数(y)相对于碘原子数(3z)的比例,即(y / 3z ),小于0.5。 制备方法包括反应步骤,第一分离步骤,再结晶步骤和第二分离步骤。 在重结晶步骤中使用的溶剂是水和醇中的至少一种。 水相对于溶剂的醇的混合重量比大于50/50或小于10/90。 即使在加热至130℃之后,它也不会降解,并且适用于当施加电压时应显示高透明度的汽车遮光玻璃。