Phenolic moulding compositions
    1.
    发明授权
    Phenolic moulding compositions 失效
    酚醛成型组合物

    公开(公告)号:US5002994A

    公开(公告)日:1991-03-26

    申请号:US349307

    申请日:1989-05-09

    摘要: A phenolic moulding composition in solid form, such as a dough moulding composition or sheet moulding composition, comprises a phenol formaldehyde novolak resin; a phenol formaldehyde resole resin as cross linking agent for the novolak resin; fibrous reinforcement; and non-fibrous particulate filler in an amount greater than the combined amount of the novolak and resole resins; the weight proportions of the ingredients being in the ranges______________________________________ phenolic resins 20-40% fibrous reinforcement 20-50% non-fibrous particulate filler 25-50% ______________________________________ Articles moulded from the compositions under heat and pressure have the flexural strength and impact strength required in certain precision parts for the automotive and engineering industries.

    Glass-reinforced thermoplastic moulding compositions
    3.
    发明授权
    Glass-reinforced thermoplastic moulding compositions 失效
    玻璃增强热塑性成型组合物

    公开(公告)号:US4056505A

    公开(公告)日:1977-11-01

    申请号:US692143

    申请日:1976-06-02

    IPC分类号: C08K5/092 C08K7/14

    CPC分类号: C08K5/092 C08K5/09 C08K7/14

    摘要: A mouldable thermoplastic material and process for making the same. The material comprises from 20% to 90% by weight of polypropylene, polyethylene or polyamide, from 80 to 10% by weight of glass fibre and from 0.05% to 15% by weight of an additive capable of coupling with the glass at a temperature in the range 180.degree. C to 300.degree. C and incapable of forming a homopolymer at that temperature. The additive is selected from oxalic acid and compounds containing the grouping ##STR1##