摘要： 研究了作为单组分涂料基料的硅溶胶与硅酸钾（钠）混合物的室温贮存稳定性，并用等温热导微量热法和粒径测量作了表征。结果表明，含小的纳米胶体二氧化硅粒子的混合物稳定性好，稳定性受硅酸钾（钠）模数、硅溶胶在混合物中占的质量分数、混合操作条件和原材料规格等因素影响。加了适当稳定剂的该混合物稳定贮存时间大大延长。最后再加入苯丙乳液配制成的基料在室温下可贮存至少7个月以上。

关键词: 硅溶胶, 硅酸钾（钠）, 单组份, 涂料基料, 稳定性

Abstract:

The stability of mixtures of silica sol and potassium(sodium)silicate as binder of 1 K coating at ambient temperature was investigated. The mixtures were characterized by using isothermal heat conduction microcalorimetry and measurements of particle size. Experimental results showed better stability for the mixtures containing small nano colloidal silica particles. And the stability was influenced by the molar ratio of silica to alkali metal oxide in potassium(sodium) silicate, the percentage by weight of silica sol in the mixture, operating conditions when mixing, raw material specifications, etc. When appropriate stabilizers was added, the mixture shored a significantly longer shelf life. Moreover. the shelf life of the binder which was prepared by mixing the mixture and stabilizers as well as styrene-acrylic emulsion can reach more than 7 months at ambient temperature.

Key words: silica sol, potassium(sodium) silicate, one-component, binder, stability