申请人:——
公开号:US20030149154A1
公开(公告)日:2003-08-07
This invention relates to the use of organophilic, swellable specially modified phyllosilicates in the production of nano-reinforced thermoplastic polymers, preferably polyamides, polyesters and polycarbonates. The inorganic phyllosilicate particles are bonded to or incorporated into the polymer in a covalent manner with nanodistribution. Special modification enables the phyllosilicates to be used as initiators in the case of polymerization or a chain elements in the case of condensation. The covalent bonding of the phyllosilicate particles to the polymer increases the stability of the reinforcing effect as opposed to an ionic bond. The special modification is performed for phyllosilicates which become hydrophobic as a result of cationic exchange. This property makes it possible for certain organic reaction partners to reach reactive groups present on the surface of the phyllosilicate and to react therewith on certain conditions. As a result of the functional groups containing organically modified phyllosilicats arising from the reaction, they are able to form stable, covalent bonds with the polymers.
本发明涉及在生产纳米增强热塑性聚合物(最好是聚酰胺、聚酯和聚碳酸酯)过程中使用亲有机、可膨胀的特殊改性植硅体。无机植硅体颗粒以共价方式与聚合物结合或融入聚合物中,并呈纳米分布。特殊的改性使植硅酸盐在聚合时可用作引发剂,在缩合时可用作链元素。与离子键相比,植硅体颗粒与聚合物之间的共价键增加了增强效果的稳定性。由于阳离子交换的结果,植硅体变得疏水,因此要对其进行特殊改性。这种特性使得某些有机反应物可以接触到植硅体表面的活性基团,并在特定条件下与之发生反应。由于反应产生的含有有机改性植硅体的官能团,它们能够与聚合物形成稳定的共价键。