有机硅-丙烯酸酯共聚物乳液的制备及在调湿涂料中的应用

以3-甲基丙烯酰氧丙基三甲氧基硅烷(MPTS)为功能改性单体,丙烯酸酯及少量的丙烯酸为主要共聚单体,采用离子型/非离子型复合乳化剂,过硫酸钾(KPS)为引发剂,制备了有机硅改性的丙烯酸酯共聚物乳液(SAE)。考察了MPTS用量、甲基丙烯酸-β-羟丙酯(HPMA)用量、引发剂用量及聚合温度对乳液稳定性的影响。采用IR、TG对SAE进行了表征。共聚物乳液SAE为成膜物,硅藻土、膨润土等为颜填料,制备了有机硅改性丙烯酸酯共聚物调湿涂料(SAE-C)。在测定共聚物乳液膜、SAE-C涂料基本性能的基础上,进一步测定了涂料SAE-C调湿功能。结果表明,MPTS能提高SAE乳液膜的附着力和涂料的耐水性;SAE乳液与SAE-C涂料均能达到国家内墙涂料和建筑涂料相关标准。同时,具有较好的增/降湿性能,可用作具有调湿功能的内墙涂料。

Preparation of Organic Silicon-Acrylate Copolymer Emulsion and its Application of Humidity Controlling Coatings

In this article,3-(diethoxymethylsilyl)propyl methacrylate(MPTS) was used as modifying functional monomer,acrylic ester and acrylic acid as main monomers,ionic emulsifiers and nonionic emulsifiers as the composite emulsifier,persulfate(KPS) as initiator,and the silicone modified acrylate copolymer emulsion(SAE) was successfully prepared.The relationship between the stability of SAE emulsion and contents of MPTS,β-hydroxypropyl methacrylate(HPMA),initiator and copolymerization temperature were investigated.IR and TG were used to characterize SAE.The SAE copolymer emulsion was applied in the preparation of silicones-acrylate copolymer humidity coating(SAE-C) with the addition of pigments and fillers,such as diatomite,bentonite,etc.By measuring the basic performance of copolymer emulsion film and SAE-C coatings,the humidifying function of SAE-C coating was investigated.In conclusion,MPTS could improve the adhesion of SAE film and water resistance of the coating.The results show that the basic properties of SAE and SAE-C match the standard for interior wall coatings.The obtained coatings had good humidity-sensitivity and humidity retention,which could be used as the interior wall coating in the building.