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    Block copolymers
    3.
    发明授权
    Block copolymers 失效
    嵌段共聚物

    公开(公告)号：US4160789A

    公开(公告)日：1979-07-10

    申请号：US734932

    申请日：1976-10-22

    申请人： Pierino Radici ,  Gaudenzio Bianchi ,  Paolo Colombo

    发明人： Pierino Radici ,  Gaudenzio Bianchi ,  Paolo Colombo

    IPC分类号： C08G2/00 ,  C08G2/38 ,  C08G63/664

    CPC分类号： C08G2/38 ,  C08G63/664

    摘要： Block copolymer of the structure A-B wherein:A is a polylactone block of recurring units: ##STR1## wherein PM is a linear polymethylene chain having from 2 to 13 carbon atoms,B is a polyoxymethylene block of recurring units --CH.sub.2 O--. The block copolymer contains at least 2 wt.% of block B and at least 0.1 wt.% of block A.The block copolymer can be used as modified polyacetal when rich in block B, or as special additive for plastics materials when rich in block A.

    摘要翻译： 结构A-B的嵌段共聚物，其中：

    Process for the polymerization of formaldehyde in the presence of anionically polymerized lactam
    5.
    发明授权
    Process for the polymerization of formaldehyde in the presence of anionically polymerized lactam 失效
    在存在阴离子聚酰胺酸酯时聚甲醛的方法

    公开(公告)号：US4000217A

    公开(公告)日：1976-12-28

    申请号：US642825

    申请日：1975-12-22

    申请人： Pierino Radici ,  Daniele Colombo ,  Paolo Colombo

    发明人： Pierino Radici ,  Daniele Colombo ,  Paolo Colombo

    IPC分类号： C08G2/00 ,  C08G2/06 ,  C08G2/08 ,  C08G2/38 ,  C08L77/00

    CPC分类号： C08G2/08 ,  C08G2/06 ,  C08G2/38

    摘要： Polyoxymethylene is prepared by feeding anhydrous formaldehyde into a reaction medium containing a liquid organic diluent non-solvent for the polyoxymethylene and non-reactive towards the other constituents of the reaction medium, and containing in a dispersed form a polymer A carrying a terminal ionic couple on its macromolecular chain, said polymer A being a polylactamic block of recurring units ##STR1## wherein PM is a linear polymethylene chain having from 3 to 13 carbon atoms, and being present in a proportion of from 0.001 to 0.1% by weight with respect to the polyoxymethylene.

    摘要翻译： 描述了一种方法，其中进料到含有待获得的聚甲醛的惰性有机稀释剂或非溶剂的反应介质的无水单体甲醛在分散在反应介质中的催化量的催化剂存在下聚合，并由 下式的内酰胺单体的离子聚合的产物：其中m是3至13的整数，其中亚甲基的一个或多个氢原子可以被烷基，烷基芳基，环烷基或芳基取代 ，催化剂的分子量为1000〜50,000。 作为内酰胺的实例，可以提及ε-己内酰胺，α-吡咯烷酮，ω-月桂内酰胺，α-哌啶酮和ω-内酰胺。 所显示的主要优点是获得的内酰胺的分子量分散性显着降低。

    Process for the polymerization of formaldehyde
    6.
    发明授权
    Process for the polymerization of formaldehyde 失效
    甲醛聚合方法

    公开(公告)号：US4355153A

    公开(公告)日：1982-10-19

    申请号：US208457

    申请日：1980-11-19

    申请人： Pierino Radici ,  Paolo Colombo

    发明人： Pierino Radici ,  Paolo Colombo

    IPC分类号： C08G2/08 ,  C08L77/02

    CPC分类号： C08G2/08

    摘要： Polyformaldehyde is prepared by polymerizing anhydrous monomeric formaldehyde in an organic, liquid and inert diluent which is a non-solvent for polyformaldehyde, in the presence of a catalyst of the formula: ##STR1## wherein A.sup.(-) is a lactamate group: ##STR2## in which PM is a linear polymethylene chain with from 3 to 13 carbon atoms, possibly substituted with one or more alkyl, cycloalkyl, aryl or alkylaryl radicals, and wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently are an alkyl, cycloalkyl, aryl or alkylaryl radical.

    摘要翻译： 在下式催化剂存在下，将无水单体甲醛聚合在有机，液体和惰性稀释剂（其为聚甲醛的非溶剂）中制备聚甲醛，其中A（ - ）为乳糖酸盐基团：IMA图 >其中PM是具有3至13个碳原子的直链多亚甲基链，可能被一个或多个烷基，环烷基，芳基或烷基芳基取代，并且其中R 1，R 2，R 3和R 4独立地是烷基，环烷基，芳基或 烷基芳基。

    Process for the recovery of formaldehyde present in waste waters
    8.
    发明授权
    Process for the recovery of formaldehyde present in waste waters 失效
    在废水中回收甲醛的方法

    公开(公告)号：US4088818A

    公开(公告)日：1978-05-09

    申请号：US692408

    申请日：1976-06-03

    申请人： Pierino Radici ,  Pietro Erini ,  Umberto Santini ,  Paolo Colombo

    发明人： Pierino Radici ,  Pietro Erini ,  Umberto Santini ,  Paolo Colombo

    IPC分类号： C07D487/18 ,  C07D295/02

    CPC分类号： C07D487/18 ,  C07C45/85

    摘要： Formaldehyde present in a waste water containing lower carboxylic acids is recovered by reacting said waste water at 0.degree. to 90.degree. C. with the amount of ammonia required for converting said formaldehyde into hexamine and the latter is recovered in solid form by evaporating the resulting solution.The solid hexamine thus recovered has a content in lower carboxylic acids not exceeding 0.05 wt.%, is practically free from other impurities and is suited for any conventional use.

    摘要翻译： 含有低级羧酸的废水中存在的甲醛通过使所述废水在0-90℃下与将所述甲醛转化成六胺所需的氨的量进行回收，后者通过蒸发所得溶液而以固体形式回收 。

    Process for improving the stability of acetal polymers
    10.
    发明授权
    Process for improving the stability of acetal polymers 失效
    改进缩醛聚合物稳定性的方法

    公开(公告)号：US4268643A

    公开(公告)日：1981-05-19

    申请号：US088250

    申请日：1979-10-25

    申请人： Pierino Radici ,  Sergio Custro ,  Paolo Colombo

    发明人： Pierino Radici ,  Sergio Custro ,  Paolo Colombo

    IPC分类号： C08G2/32 ,  C08G2/34 ,  C08G6/00

    CPC分类号： C08G2/34 ,  C08G2/32

    摘要： The terminal hydroxyl groups of an acetal polymer are esterified or etherified by reaction with an end-capping agent chosen from anhydrides of carboxylic acids, orthoesters and orthocarbonates, by forming an intimate mixture of polymer in powder form and liquid end-capping agent, the amount of said agent in the mixture being less than that which results in loss of the free-flowing characteristics of the powder, and reacting said mixture under stirring at 50.degree.-170.degree. C.

    摘要翻译： 通过与选自羧酸，原酸酯和原碳酸酯的酸酐的封端剂反应，通过形成粉末形式的聚合物和液体封端剂的紧密混合物，缩醛聚合物的末端羟基被酯化或醚化， 所述混合物中的所述试剂的摩尔比小于粉末的自由流动特性的损失，并且在搅拌下使所述混合物在50-170℃下反应。