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    • 8. 发明申请
    • METHOD FOR PREVENTING HARDENING CONCRETE FROM STICKING TO ADJACENT SURFACES
    • 防止混凝土从附着到表面的方法
    • WO1989002356A1
    • 1989-03-23
    • PCT/SE1988000485
    • 1988-09-20
    • LJUNGBO, Sven
    • B28B07/38
    • B28B7/384
    • The invention consists in coating surfaces, which on occasion are in contact with concrete as it hardens, for example mould covers, concrete handling equipment etc., with a protective layer of plastic which has the property that concrete does not adhere to the plastic surface. The protective layer is made of a polymer pertaining to a certain group of polymers. This group is characterized by the fact that the polymer chains consist entirely or in large proportion - at least 30 per cent by weight - of an atomic group, which can be written: (I), where Qa, Qb and Qc each constitutes a single representive from the group hydrogen atoms, hydrocarbon groups and functional groups, but Qd constitutes a single representative only from the group alkyl groups. The most current ones in this group are polymetacrylates and polypropylene. The latter, especially, is highly suitable, owing to the fact that it is easy to produce thin films or fibres, respectively, thereof. The protective layer need not consist 100 % of a polymer according to the above definition but may consist of a mixture of such a polymer with another polymer compatible therewith, even one lacking the former's release capacity in respect of concrete as it hardens. The protective layer is applied to the surface to be protected by lacquering or by laminating with the aid of gluing or hot pressing. The protective layer, reinforced with fibres of the polymer type defined above, for example polypropylene fibres, is particularly wear-resistant.
    • 本发明包括涂层表面,其有时在硬化时与混凝土接触,例如具有塑料保护层的模具盖,混凝土处理设备等,其具有混凝土不粘附到塑料表面的性质。 保护层由与某组聚合物有关的聚合物制成。 该组的特征在于,聚合物链全部或大部分(至少占原子量的30%),可以写为:(I),其中Qa,Qb和Qc各自构成单 代表氢原子,烃基和官能团,但Qd仅由烷基组成单一代表。 该组中最新的是聚甲基丙烯酸酯和聚丙烯。 特别地,后者由于分别容易地制造薄膜或纤维的事实是非常适合的。 保护层不需要根据上述定义的100%的聚合物,而是可以由这种聚合物与另一种与其相容的聚合物的混合物组成,甚至在混凝土硬化时缺少前者的释放能力。 保护层通过涂漆或通过胶合或热压辅助层压而被施加到待保护的表面上。 用上述聚合物类型的纤维(例如聚丙烯纤维)增强的保护层是特别耐磨的。