Dual phase rubber composition and tire with nanocomposite-containing sidewall thereof
    41.
    发明授权
    Dual phase rubber composition and tire with nanocomposite-containing sidewall thereof 失效
    双相橡胶组合物和具有纳米复合材料侧壁的轮胎

    公开(公告)号:US07473728B2

    公开(公告)日:2009-01-06

    申请号:US11014017

    申请日:2004-12-16

    IPC分类号: C08K9/04

    摘要: This invention relates to a dual phase rubber composition and pneumatic tire with a rubber sidewall thereof, namely a dual phased non-black colored rubber composition composed of a first pre-formed elastomer phase comprised of butyl-type rubber and EPDM rubber containing a dispersion therein of reinforcing filler comprised of a particulate amorphous precipitated silica and a second pre-formed elastomer phase comprised of a nanocomposite of natural rubber containing a dispersion therein of exfoliated clay platelets. Said exfoliated clay platelets may be substantially oriented within the tire sidewall in a parallel direction to each and may also be substantially oriented in an annular direction about the axis of the tire. The tire sidewall rubber composition may contain at least one additional elastomer which may be included in either or both of said elastomer phases. Such tire sidewall rubber composition may contain a non-black colorant pigment, such as for example a white colored titanium dioxide pigment. The dual phased tire sidewall rubber composition is prepared by a phase mixing process comprised of pre-blending said butyl-type rubber and EPDM rubber together with said precipitated silica reinforcing filler to form a pre-mix thereof, and thereafter mixing therewith said nanocomposite as a pre-formed blend of natural rubber and exfoliated clay platelets.

    摘要翻译: 本发明涉及一种双相橡胶组合物和具有橡胶侧壁的充气轮胎,即双相非黑色橡胶组合物,其由包含丁基橡胶的第一预成型弹性体相和含有分散体的EPDM橡胶组成 的由无定形沉淀二氧化硅颗粒构成的增强填料和由纳米复合材料组成的第二预成形弹性体相,其中所述天然橡胶含有分散在其中的剥离粘土片晶。 所述剥离的粘土小片可以在轮胎侧壁内基本上在与每个平行的方向上定向并且也可以基本上围绕轮胎的轴线在环形方向上取向。 轮胎侧壁橡胶组合物可以含有至少一种另外的弹性体,其可以包括在所述弹性体相中的一个或两个中。 这种轮胎侧壁橡胶组合物可以含有非黑色着色剂颜料,例如白色二氧化钛颜料。 双相轮胎侧壁橡胶组合物通过相混合方法制备,该相混合方法包括将所述丁基橡胶和EPDM橡胶与所述沉淀二氧化硅增强填料一起预混合以形成其预混物,然后与所述纳米复合材料混合, 预先形成的天然橡胶和剥离粘土血小板的混合物。