Process for the production of polyamide
    6.
    发明授权
    Process for the production of polyamide 失效
    聚酰胺生产工艺

    公开(公告)号:US06737499B2

    公开(公告)日:2004-05-18

    申请号:US10146370

    申请日:2002-05-15

    IPC分类号: C08G6916

    CPC分类号: C08G69/04 C08G69/16

    摘要: A process for using low-molecular weight compounds that are water-extracted from (co)polyamides in the production of polyamide is disclosed. The process entails reacting these compounds with 10 to 15 wt. % water for a period of 3.5 to 6 hours at a temperature of 220° C. to 270° C., and polymerizing the resulting product along with caprolactam.

    摘要翻译: 公开了一种在聚酰胺生产中使用从(共)聚酰胺水提取的低分子量化合物的方法。 该方法需要使这些化合物与10至15wt。 %水,温度为220〜270℃,时间为3.5〜6小时,并与己内酰胺一起聚合得到的产物。

    Process and device for extracting polyamide
    7.
    发明授权
    Process and device for extracting polyamide 失效
    聚酰胺提取工艺及装置

    公开(公告)号:US06699962B2

    公开(公告)日:2004-03-02

    申请号:US10146320

    申请日:2002-05-15

    IPC分类号: C08F600

    CPC分类号: C08G69/48 C08G69/04 C08G69/16

    摘要: A process for removing low molecular weight constituents from polyamide 6 or from copolyamides based on caprolactam (herein (co)polyamide) is disclosed. The process comprise subjecting the (co)polyamide to liquid-extraction at a temperature which is above the boiling point of the liquid at atmospheric pressure said liquid containing water in an amount of at least 80 percent relative to its weight.

    摘要翻译: 公开了一种从聚酰胺6或基于己内酰胺(这里(共)聚酰胺)的共聚酰胺除去低分子量成分的方法。 该方法包括使(共)聚酰胺在大气压下在高于液体沸点的温度下进行液体萃取,所述液体含水量相对于其重量至少为80%。

    Stabilized polyamides
    10.
    发明授权
    Stabilized polyamides 失效
    稳定聚酰胺

    公开(公告)号:US4426475A

    公开(公告)日:1984-01-17

    申请号:US446943

    申请日:1982-12-06

    IPC分类号: C08L77/00 C08K5/18 C08K5/36

    CPC分类号: C08K5/18

    摘要: Stabilized polyamides containing from 0.02 to 5%, by weight of a diphenylamine compound corresponding to the following general formula: ##STR1## wherein R.sup.1 and R.sup.3, which may be the same or different, represent hydrogen, a CH.sub.3 --, C.sub.2 H.sub.5 -- or isopropyl group and R.sup.3 is in the o-, m- or p-position to the N-atom substitution;R.sup.2 represents hydrogen, a C.sub.4 -C.sub.12 alkyl, C.sub.7 -C.sub.12 aralkyl or C.sub.5 -C.sub.12 cycloalkyl group and is in the o-, or p-position to the N-atom substitution;n represents an integer of from 1 to 29; andY is a divalent, non-mono-olefinically unsaturated radical having the same meaning as R.sup.2 and, in addition, may represent (in a proportion of up to 50 mole percent) --S--, --CH.sub.2 --S--CH.sub.2 --, --CH.sub.2 --O--CH-- or >CH--R.sup.4, wherein R.sup.4 represents H, C.sub.1 -C.sub.6 alkyl or C.sub.5 or C.sub.6 cycloalkyl, and may be in the o- or p-position to the N-atom substitution.

    摘要翻译: 含有0.02至5%(重量)对应于以下通式的二苯胺化合物的稳定化聚酰胺:其中R 1和R 3可以相同或不同,表示氢,CH 3 - ,C 2 H 5 - 或异丙基,并且R 3与N原子取代的邻,间或对位; R 2表示氢,C 4 -C 12烷基,C 7 -C 12芳烷基或C 5 -C 12环烷基,并且位于与N-取代基的邻位或对位; n表示1〜29的整数, 并且Y是具有与R 2相同含义的二价,非单烯属不饱和基团,并且另外可以表示(以高达50摩尔%的比例)-S - , - CH 2 -S-CH 2 + 13, -CH 2 -O-CH-或> CH-R 4,其中R 4表示H,C 1 -C 6烷基或C 5或C 6环烷基,并且可以在与N-取代基的邻位或对位。