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    Molecular sizing process
    13.
    发明授权
    Molecular sizing process 失效
    分子筛分方法

    公开(公告)号：US3714134A

    公开(公告)日：1973-01-30

    申请号：US3714134D

    申请日：1971-04-30

    申请人： CITIES SERVICE CO

    发明人： OLECHOWSKI J

    IPC分类号： C08F8/50 ,  C08D5/00 ,  C08D13/00

    CPC分类号： C08F8/50 ,  C08F210/12 ,  C08F236/08

    摘要： LOW MOLECULAR WEIGHT BUTYL-TYPE COPOLYMERS ARE PREPARED BY CONTACTING A BUTYL-TYPE RUBBER WITH CATALYST COMPOSITION COMPRISING A TRANSITION METAL SALT, AN ORGANOMETALLIC COMPOUND OF A METAL OF GROUP I-A, II-A, II-B, OR III-A OF THE PERIODIC TABLE OF ELEMENTS, AND A PROTON DONOR. THE CATALYST COMPOSITION PREFERABLY COMPRESSES A HALIDE OF TUNGSTEN, MOLBDENUM, OR RHENIUM, AN ALKYL ALUMINUM HALIDE, AND A LOWER ALKANOL.

    Process for producing fibrids from latex foam
    16.
    发明授权
    Process for producing fibrids from latex foam 失效
    从LATEX FOAM生产纤维的方法

    公开(公告)号：US3668195A

    公开(公告)日：1972-06-06

    申请号：US3668195D

    申请日：1968-10-16

    申请人： GOODRICH CO B F

    发明人： GEER WILLEM JAN VAN DER

    IPC分类号： C08J3/16 ,  D21H17/35 ,  D21H17/36 ,  D21H17/37 ,  D21H21/52 ,  C08D5/00 ,  C08C1/14

    CPC分类号： D21H21/52 ,  C08J3/16 ,  D21H17/35 ,  D21H17/36 ,  D21H17/37

    摘要： Paper-like and non-woven sheet-form articles of superior properties are produced by a process in which an aqueous latex of a polymeric binder material of natural or synthetic origin is first foamed, as by beating with air, the resulting foamed latex mixed with a coagulant under vigorous agitation to form directly an aqueous suspension of mainly flocculent particles of uniform particle size distribution, the resulting suspension of binder particles admixed with an aqueous suspension of fibers and the resulting mixed suspension dewatered to form a sheet which is then dried. The binder particles obtained by coagulation of a foamed latex produce products of higher wet and dry strengths and are more efficient in that more of the binder is retained by the fibers and less is lost in the dewatering operation.

    摘要翻译： 通过以天然或合成来源的聚合物粘合剂材料的水性胶乳首先发泡，通过与空气一起打浆的方法制备具有优异性能的纸状和无纺布片状制品，将得到的泡沫胶乳与 凝结剂在剧烈搅拌下直接形成主要具有均匀粒度分布的絮状颗粒的水性悬浮液，所得到的粘合剂颗粒悬浮液与纤维的水性悬浮液混合，并将所得混合悬浮液脱水形成片材，然后将其干燥。 通过凝结发泡胶乳获得的粘合剂颗粒产生更高的湿和干强度的产品，并且更有效，因为更多的粘合剂被纤维保留，并且在脱水操作中损失较少。

    Process of joining lithiated polymers or copolymers
    17.
    发明授权
    Process of joining lithiated polymers or copolymers 失效
    接合立体聚合物或共聚物的方法

    公开(公告)号：US3607846A

    公开(公告)日：1971-09-21

    申请号：US3607846D

    申请日：1969-01-21

    申请人： FIRESTONE TIRE & RUBBER CO

    发明人： HALASA ADEL F ,  TATE DAVID P

    IPC分类号： C08C19/00 ,  C08C19/44 ,  C08D5/04 ,  C08D5/00 ,  C08D5/02

    CPC分类号： C08C19/00 ,  C08C19/44

    摘要： Polymers of increased molecular weight are produced from plastic and/or rubbery polymers derived from vinylidene monomers by reaction with an organic halogen compound in the presence of an alkali metal hydrocarbon and also in the presence of an accelerator which is a Lewis base. The reactant polymers include polystyrene and similar plastic polymers and rubbery polymers such as polybutadiene and butadiene-styrene copolymers. The organic halogen compound is any carbon compound containing at least one reactive halogen atom per molecule. The halogen is fluorine, chlorine, bromine and/or iodine. The alkali metal hydrocarbon is preferably a ''''live'''' polymer containing reactive alkali metal, e.g., polybutadiene produced by polymerization of butadiene-1,3 by means of a lithium initiator. The Lewis base may be organic or inorganic, but it is preferred to use organic compounds and especially ethers. Preferred products are nonflow rubbery polymers.

    Process for the production of finely divided styrene-butadiene copolymers
    18.
    发明授权
    Process for the production of finely divided styrene-butadiene copolymers 失效
    生产精细分散苯乙烯 - 丁二烯共聚物的方法

    公开(公告)号：US3558576A

    公开(公告)日：1971-01-26

    申请号：US3558576D

    申请日：1968-02-06

    申请人： COATHYLENE SA

    发明人： WELLER WOLFGANG

    IPC分类号： C08J3/14 ,  C08D5/00 ,  C08F1/92

    CPC分类号： C08J3/14 ,  C08J2309/06

    摘要： A PROCESS FOR THE PRODUCTION OF FINELY DIVIDED STYRENEBUTADIENE COPOLYMERS FROM A CORRESPONDING COARSER COPOLYMER COMPOSITION WHICH COMPRISES DISSOLVING THE COARSER MATERIAL IN A HOMOGENEOUS SOLVENT MIXTURE WHICH CONSISTS OF AT LEAST ONE SOLVENT FOR THE COPOLYMER, AND AT LEAST ONE SOLVENT FOR THE COPOLYMER, THE NON-SOLVENT PART HAVING A HIGHER BOILING POINT THAN THAT OF THE SOLVENT; THEREAFTER REMOVING FROM THE MIXTURE BY VACUUM DISTILLATION THE SOLVENT PORTION TO AN EXTENT AT LEAST SUFFICIENT THAT THE DISSOLVED COPOLYMER IS PRECIPITATED IN THE FORM OF A DISPERSION, AND FINALLY PURIFYING THE MATERIAL THUS PRECIPITATED BY TREATING IT WITH FURTHER NON-SOLVENT WHICH IS HOMOGENEOUSLY MISCIBLE WITH THE RESIDUAL LIQUID.