Bituminous compositions modified with polyolefinic materials
    1.
    发明授权
    Bituminous compositions modified with polyolefinic materials 失效
    用聚烯烃材料改性的沥青组合物

    公开(公告)号:US06284820B1

    公开(公告)日:2001-09-04

    申请号:US08900035

    申请日:1997-07-24

    IPC分类号: C08J9500

    摘要: The present invention relates to bituminous compositions, particularly suitable for paving and building waterproofing, comprising a bitumen and a copolymer of ethylene with propylene and/or other alpha-olefins and optionally with smaller proportion of a diene or polyene. The copolymer is besides characterized by a very low crystallinity, intrinsic viscosity higher than 1.5 dl/g and by a content of propylene units or of the alpha-olefin in form of triads comprised between 4 and 50% of the propylene or of the alpha-olefin, with at least 70% of said triads having isotactic structure.

    摘要翻译: 本发明涉及沥青组合物,特别适用于铺路和建筑防水,其包含沥青和乙烯与丙烯和/或其它α-烯烃以及任选地较少比例的二烯或多烯的共聚物。 该共聚物的特征在于非常低的结晶度,特性粘度高于1.5dl / g,丙烯单元或三元组形式的α-烯烃含量在丙烯或α-烯烃的4-50%之间, 烯烃,其中至少70%的所述三单元组具有全同立构结构。

    Process for preparing multilayer fibrous structures and product
    3.
    发明授权
    Process for preparing multilayer fibrous structures and product 失效
    制备多层纤维结构和产品的方法

    公开(公告)号:US4500594A

    公开(公告)日:1985-02-19

    申请号:US588775

    申请日:1984-03-12

    摘要: Composite sheets comprising a layer of cellulosic fibers and a layer adjacent thereto consisting in whole or in part of thermoplastic fibers are made to adhere by superimposing the sheets on the side of the cellulosic fibers layer and by inserting between such layers a film of a thermoplastic polymer having:(a) a melting temperature lower than the melting temperature of the polymer forming the thermoplastic synthetic fibres contained in the layer adjacent to the cellulosic layer, intended for the adhesion, of the composite sheet;(b) a viscosity in the molten state--measured in a capillary viscosimeter, at a velocity gradient equal to or lower than 10.sup.-1 seconds, and at a temperature comprised between a temperature higher by 10.degree. C. than the melting temperature of such polymer and a temperature higher by 20.degree. C. than the melting temperature of the abovesaid thermoplastic fibres--lower than 1.multidot.10.sup.8 poises, and preferably lower than 1.multidot.10.sup.5 poises;(c) a surface tension not exceeding by more than 5 dynes/cm the surface tension of the polymer forming such thermoplastic fibres, measured at the same temperature;(d) a solubility parameter, at a temperature of 25.degree. C., in a ratio of from 0.8 to 1.15, extremes included, to the solubility parameter of the polymer forming such thermoplastic fibres; andby heating the whole at a temperature ranging from a temperature exceeding by 10.degree. C. the melting temperature of the polymer forming such film to a temperature exceeding by 20.degree. C. the melting temperature of the polymer forming the synthetic fibres existing in the layer which is adjacent to the cellulosic fibre layer, intended for the adhesion, of the composite sheet.

    摘要翻译: 通过将纤维素纤维层的一层和纤维素纤维全部或部分组成的复合片材叠合在纤维素纤维层的侧面上,并通过在这些层之间插入热塑性聚合物膜 具有:(a)低于形成所述复合片材的附着层的与纤维素层相邻的层中所含的热塑性合成纤维的聚合物的熔融温度的熔融温度; (b)熔融状态下的粘度 - 在毛细管粘度计中以等于或低于10-1秒的速度梯度测量,并且在比其温度高10℃的温度下 聚合物,比上述热塑性纤维的熔融温度高20℃,低于1×10 8泊,优选低于1×10 5泊; (c)在相同温度下测量的形成这种热塑性纤维的聚合物的表面张力不超过5达因/厘米的表面张力; (d)溶解度参数,在25℃的温度下,所包含的极限为0.8-1.15,与形成这种热塑性纤维的聚合物的溶解度参数; 并且在温度超过10℃的温度下加热整体,形成这种膜的聚合物的熔融温度超过20℃。形成存在于层中的合成纤维的聚合物的熔融温度 其邻近纤维素纤维层,用于粘合复合片材。

    Dynamically vulcanizable polyolefin composition
    4.
    发明授权
    Dynamically vulcanizable polyolefin composition 失效
    动态可硫化聚烯烃组合物

    公开(公告)号:US07019078B1

    公开(公告)日:2006-03-28

    申请号:US09571997

    申请日:2000-05-16

    IPC分类号: C08L23/10 C08L23/04 C08L23/26

    CPC分类号: C08K5/3435 C08K5/14

    摘要: Polyolefin compositions comprising: (A) 20 to 50 parts by weight of a particular propylene polymer having a MWD greater than 3.5; and (B) 50 to 80 parts by weight of an elastomeric ethylene copolymer having a low enthalpy of fusion and a narrow MWD. The compositions of the invention are capable of giving, after dynamic vulcanization, thermoplastic elastomeric products having optimum elastomeric properties and a good balance of physico-mechanical properties.

    摘要翻译: 聚烯烃组合物,其包含:(A)20至50重量份具有MWD大于3.5的特定丙烯聚合物; 和(B)50至80重量份具有低熔融焓和窄MWD的弹性体乙烯共聚物。 本发明的组合物能够在动态硫化后提供具有最佳弹性性质和良好物理机械性能平衡的热塑性弹性体产品。