苯丙乳液合成中复配乳化剂对滤纸透气和耐水性能的影响

Influence of emulsifiers used for preparation of styrene-acrylic emulsion on air permeability and water resistance of automobile filter paper

以苯乙烯和丙烯酸酯为主要单体,设计多种复配乳化剂方案,通过单体预乳化、半连续乳液聚合法合成苯丙乳液,用做汽车发动机空气滤清器滤纸浸渍树脂。实验研究了多种复配乳化剂合成苯丙乳液对滤纸透气度、耐水性能的影响,筛选对滤纸性能作用效果良好的复配乳化剂。结果表明:复配乳化剂合成苯丙乳液使滤纸透气度下降6%～11%,保持滤纸透气度90%以上的复配乳化剂有OP-10/S-100、OP-10/CO-436、OR-2/FR-1、OR-2/RS-610、S-201/FR-1、S-201/OF-40、S-201/RS-610,FOR-3/S-100、FOR-3/COPS-1、FOR-3/OF-40;不同复配乳化剂合成的乳液对滤纸耐水性能影响非常大,OP-10/FR-1、OR-2/FR-1、FOR-3/OF-40合成乳液浸渍滤纸耐水时间在240min以上。对保持滤纸透气度90%以上和耐水性能均有良好作用的复配乳化剂依次是OR-2/FR-1、FOR-3/OF-40、S-201/FR-1、FOR-3/COPS-1。

By using styrene and acrylic ester as the base materials,a series of styrene-acrylic emulsions were prepared via the pre-emulsification and semi-continuous copolymerization method,the emulsions were subsequently used for the preparation of emulsion-impregnated automobile filter paper.The influence of emulsifiers on air permeability and water resistance was investigated,and then the emulsifiers with great performances were selected.Results show that by use of emulsifiers,air permeability is reduced by 6%～11%.When the emulsifiers including OP-10/S-100,OP-10/CO-436,OR-2/FR-1,OR-2/RS-610,S-201/FR-1,S-201/OF-40,S-201/RS-610,FOR-3/S-100,FOR-3/COPS-1 and FOR-3/OF-40 were used,air permeability was maintained by more than 90%（in comparison to the base paper）.The emulsifiers including OP-10/FR-1,OR-2/FR-1 and FOR-3/OF-40 were capable of achieving very high water resistance（above 240min）.The emulsifiers capable of maintaining both good air permeability（90%） and good water resistance are OR-2/FR-1,FOR-3/OF-40,S-201/FR-1,and FOR-3/COPS-1.