Abstract

Some physical properties of acrylate resin balloons were compared with extender pigments. Acrylate balloons were prepared through the process of in situ polymerization of W/O/W emulsion.The angle of fall and the angle of repose were measured in order to evaluate the spreadability of acrylate balloons and extenders when they are applied to the skin. From the relation between the angle of fall and the angle of repose, extenders are classified in three groups. Each group of extenders is characterized with their particle shape such as spherical or platelike. Acrylate balloons are located out of the range of these three groups because of their low angle of fall and low angle of repose.It was also shown that not only the particle shape but the structure of the particle surface has affected the spreading behavior of extenders on the skin.The oil absorption value of acrylate balloons was adjustable, to be lower than that of silica beads but higher than that of the other extenders, by changing the amount of surfactant used in the polymerization process.The transparency and the air permeability were also measured. Due to the porous baloon particle structure, acrylate balloons were less transparent than acrylate beads, but more transparent than nylon powder.The air permeability of acrylate balloons was almost twice times larger than that of the other spherical extenders. Porour balloon structure of acrylate ballons appeared to be effective to provide high air permeability.The result of water absorption study suggests that acrylate balloons have the moisture control capacity when they are applied to the skin. Acrylate balloons absorbed water in high humid air and released water to dry air reversibly. The amount of water held in acrylate balloons was much larger than that of silica beads, and the balloons absorbed less water in the low humid condition as compared with silica beads.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call