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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 improving the stability of acetal polymers
    6.
    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。

    Process for the stabilization of polyacetal reins
    8.
    发明授权
    Process for the stabilization of polyacetal reins 失效
    聚合物纤维素稳定化的方法

    公开(公告)号：US3998791A

    公开(公告)日：1976-12-21

    申请号：US605949

    申请日：1975-08-19

    申请人： Pierino Radici ,  Sergio Custro ,  Paolo Colombo

    发明人： Pierino Radici ,  Sergio Custro ,  Paolo Colombo

    IPC分类号： C08G2/34 ,  C08G2/32

    CPC分类号： C08G2/34

    摘要： Process for the stabilization of polyacetal resins having terminal hydroxyl groups, which comprises reacting a reagent capable of etherifying the hydroxyl groups with the polyacetal resins suspended in a reaction medium that is liquid under the conditions used, the said reaction medium consisting of at least one substance that is a solvent for the polymer and at least one substance that is a non-solvent for the polymer, the said solvent and non-solvent substances being completely miscible at the reaction temperatures but immiscible or partly miscible at temperature substantially lower than the reaction temperatures, and carrying out the operation in the presence of catalytic quantities of one or more compounds selected from the groups consisting ofA. strong or medium-strong mineral acids whose acid dissociation constant or first acid dissociation constant is higher than 10.sup..sup.-7 ;B. strong or medium-strong oganic acids whose acid dissociation constant is higher than 10.sup..sup.-6 ;C. alkyl, cycloalkyl, or alkylaromatic esters of strong or medium-strong mineral acids;D. alkyl, cycloalkyl or alkylaromatic esters of strong or medium-strong organic acids.

    Block copolymers
    9.
    发明授权
    Block copolymers 失效
    嵌段共聚物

    公开(公告)号：US3979479A

    公开(公告)日：1976-09-07

    申请号：US533267

    申请日：1974-12-16

    申请人： Pierino Radici ,  Gaudenzio Bianchi ,  Daniele Colombo ,  Paolo Colombo

    发明人： Pierino Radici ,  Gaudenzio Bianchi ,  Daniele Colombo ,  Paolo Colombo

    IPC分类号： C08G69/00 ,  C08G2/00 ,  C08G2/38 ,  C08G63/685 ,  C08G69/44 ,  C08L77/02

    CPC分类号： C08G2/38 ,  C08G63/6852 ,  C08G69/44

    摘要： A novel block copolymer HO--D--A--B--D--H, whereinA is a polylactonic block of recurring units ##EQU1## B is a polylactamic block of recurring units ##EQU2## C is a polyoxymethylene block of recurring units--CH.sub.2 O--is prepared by catalytic polymerization of at least one lactone ##EQU3## with at least one lactam ##EQU4## wherein: PM.sub.1 and PM.sub.2 are polymethylene linear chains having from 2 to 13 and 3 to 13 carbon atoms, respectively, and being either non-substituted or having at least one hydrogen atom replaced by an alkyl, aryl, alkylaryl or cycloalkyl radical, and reaction of the resulting A-B copolymer with monomeric formaldehyde.The block copolymer HO--D--A--B--D--H having a preponderant percentage in blocks A, B or D, respectively, behaves as a polylactone, polylactam or polyformaldehyde, respectively, having improved properties.

    摘要翻译： 一种新的嵌段共聚物HO-DABDH，其中A是重复单元的聚乳酸嵌段-C（PM1）-O-- PARALLEL OB是重复单元的聚乳酸嵌段-C-（PM2）-N-- PARALLEL | OH C是重复单元-CH 2 O-的聚甲醛嵌段，其通过至少一种内酯（PM1）|| CO-O |与至少一种内酰胺（PM2），|| || | CO- -NH|其中：

    Stable aqueous suspensions of zeolite which can be easily pumped
    10.
    发明授权
    Stable aqueous suspensions of zeolite which can be easily pumped 失效
    易于泵送的稳定的沸石水性悬浮液

    公开(公告)号：US5312793A

    公开(公告)日：1994-05-17

    申请号：US905731

    申请日：1992-06-29

    申请人： Paolo Colombo ,  Pier D. Mattioli ,  Luigi Valtorta ,  Pierino Radici

    发明人： Paolo Colombo ,  Pier D. Mattioli ,  Luigi Valtorta ,  Pierino Radici

    IPC分类号： C01B39/14 ,  C11D1/72 ,  C11D1/825 ,  C11D3/12 ,  B01J20/18 ,  B01J20/28 ,  C11D3/08

    CPC分类号： C11D3/1286 ,  C11D1/8255 ,  C11D1/72

    摘要： Stable aqueous suspensions of zeolite 4A which can be easily pumped, containing from 0.5 to 65% of zeolite and from 0.05 to 6 g (per 100 g of zeolite) of a suspending agent, composed of mixtures of ethoxylated alkanols, said mixtures being obtained by ethoxylating: a) biodegradable branched alkanols, having from 10 to 18 carbon atoms and having a single branching in position 2, said mixtures containing at least 2 alkanols having a different number of C atoms; or b) mixtures containing 40-100% of branched alkanols as in a) and 60-0% of linear alkanols having from 10 to 18 C atoms.

    摘要翻译： 沸石4A的稳定含水悬浮液，其易于泵送，其含有0.5至65％的沸石和0.05至6g（每100g沸石）悬浮剂，其由乙氧基化链烷醇的混合物组成，所述混合物由 乙氧基化：a）具有10至18个碳原子并且在位置2具有单个支链的可生物降解的支链烷醇，所述混合物含有至少2个具有不同数目C原子的链烷醇; 或b）含有40-100％如a）中的支链链烷醇和60-0％的具有10至18个C原子的线性链烷醇的混合物。