在涂估中差异应用触变性流变剂和假塑性流变剂(国外英文资料).docVIP

在涂料中区别应用触变性流变剂和假塑性流变剂(国外英文资料) The application of thixotropic rheology agent and pseudoplastic rheometer is different in coatings The auxiliary agent that can improve coating rheology is called rheological modifier, also known as rheological agent. In general, rheological agents can improve the stability and coating properties of coatings and improve coating quality. Such as: prevent the accumulation of the appearance and packing in the coating process, avoid the splash-down and flow of the coating during the coating process, and improve the flow flat performance of the coating. From the rheological point of view, the rheological agent also divided into thixotropy rheological agent and pseudoplastic rheology agent, the difference between them and shear force system structure after removal of the speed of recovery. This characteristic is the main influence factor of coating flow and flow flat. Pseudoplastic rheological agent because of the structure of the fast recovery rate, the viscosity and shear force to remove almost immediately after the recovery structure, thus is advantageous to the coating can prevent subsidence and prevent sagging, but high dosage when the adverse effects on the flow and flow flat, and then the quality of the coating, such as the heavy brush marks, spraying atomized bad, etc. The typical pseudo plastic rheoagent is the gas phase silicon dioxide, soluble castor oil and polyolefins. Thixotropic rheological agent can display real-time after plus shear force to remove the structure of the related recovery rate, used to paint can be satisfied with the flow resistance of hang, without loss of flow and flow property, its application in coating is better than pseudoplastic rheological agent. This kind of rheological agent mainly has organic clay and hydrogenated castor oil base organic wax etc. Thixotropy has to do with the shape of the stuffing, the larger the particle aspect ratio (aspectratio), the smaller the size and the higher the effect of t