Preparation and characterization of fluorocarbon latex modified by diallyl malate

Usually, the traditional acrylate polymer latex, which is used as the binder of the coatings, is a linear polymer and properties of the latex film cannot meet with the demand of the high-grade coatings. Presently, there are few reports on the polyacrylate latex modified by diallyl malate, i.e. butanedioic acid,2-hydroxy-, 1,4-di-2-propen-1-yl ester (BAHD) and long fluorocarbon acrylate monomer such as dodecafluoroheptyl methacrylate (DFMA) in the open literatures. The purpose of this work is that the cross-linked acrylate latex is prepared which DFMA and BAHD are used as the functional monomer and as a cross-linking monomer, respectively. The cross-linked acrylate latex is prepared which methyl methacrylate (MMA) and butyl acrylate (BA) is used as the main monomers and the non-ionic emulsifier isomeric alcohol polyoxyethylene ether (X-407) and the anionic emulsifier sodium dodecyl sulfonate (SDS) are used as emulsifiers. DFMA and BAHD are used as the functional monomer and as a cross-linking monomer, respectively. Factors which have an influence on the properties of the resultant latex and the emulsion polymerization are investigated in detail. The optimal recipe of preparing the latex is obtained as follows: the amount of mixed emulsifiers is 6% and mass ratio of X-470 to SDS is 2:1. When the amount of BAHD is 4.47%, the water absorption rate is reduced greatly. The glass transition temperature is 10 °C. In compassion with the conventional latex, the thermal decomposition temperature is increased by 10 °C. The resultant latex has good stability and small particle size. The latex film exhibits hydrophobicity and the water contact angle is more than 90°.