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    • 4. 发明申请
    • CURABLE FILM-FORMING COMPOSITION EXHIBITING IMPROVED SCRATCH RESISTANCE
    • 可塑成膜组合物展现改进的耐刮擦性
    • WO2003070839A1
    • 2003-08-28
    • PCT/US2003/004746
    • 2003-02-19
    • PPG INDUSTRIES OHIO, INC.
    • VANIER, Noel, R.MUNRO, Calum, H.CLAAR, James, A.JENNINGS, Robert, E.
    • C09D7/12
    • C09D7/67C08K3/22C08K3/36C09D7/61Y10T428/254Y10T428/257Y10T428/259Y10T428/269
    • A curable film-forming composition is provided that on curing produces a coating, comprising in a medium (i) 10 to 90 percent by weight based on the total weight of resin solids in the film-forming composition of a crosslinking agent; (ii) 10 to 90 percent by weight based on the total weight of resin solids in the film-forming composition of a polymer containing a plurality of functional groups reactive with the crosslinking agent; and (iii) 20 to 85 percent by volume based on the total volume of the film-forming composition of particles having a mean particle size less than 100 nm. The particles further have an index of refraction sufficiently similar to that of the polymer of (ii) to minimize haze, and have an affinity for the medium sufficient to keep the particles suspended therein. The affinity of the particles for the medium is greater than the affinity of the particles for each other, thereby preventing agglomeration of the particles within the medium. The film-forming compositions exhibit improved scratch (mar) resistance compared to compositions of the prior art, as well as improved sag resistance when compared to similar coating compositions prepared without the particles. A multi-component composite coating composition is also provided. The coating composition comprises a pigmented film-forming composition serving as a base coat and a clear film-forming composition serving as a transparent topcoat over the base coat. The transparent topcoat, or clear coat, is derived from the curable film-forming composition described above.
    • 提供了一种可固化成膜组合物,其在固化时产生涂层,所述涂层包含介质(i)基于交联剂的成膜组合物中的树脂固体的总重量为10至90重量% (ii)基于成膜组合物中含有与交联剂反应的多个官能团的聚合物的树脂固体的总重量为10〜90重量% 和(iii)基于平均粒度小于100nm的成膜组合物的总体积为20〜85体积%。 颗粒进一步具有与(ii)的聚合物的折射率相当的折射率,以使雾度最小化,并且对于足以使颗粒悬浮在其中的介质具有亲和性。 颗粒对介质的亲和力大于颗粒彼此的亲和力,从而防止颗粒在介质内的团聚。 当与现有技术的组合物相比时,成膜组合物显示出改善的耐擦伤性(耐擦伤性),以及当与不含颗粒制备的类似涂料组合物相比时,改善的抗流挂性。 还提供了多组分复合涂料组合物。 涂料组合物包含用作底涂层的着色成膜组合物和在底涂层上作为透明面漆的透明成膜组合物。 透明面漆或透明涂层衍生自上述可固化成膜组合物。