The solubility parameter of MBS is between 9.4 and 9.5, which is close to that of PVC, so it has good compatibility with PVC. Its main feature is that transparent products can be made by adding PVC. Generally, adding 10- 17 phr to PVC can improve the impact strength of PVC by 6- 15 times.
However, when the MBS content is more than 30 phr, the impact strength of PVC decreases. MBS itself has good impact performance and transparency, and the light transmittance can reach over 90%. While improving the impact, it has little effect on other properties of the resin, such as tensile strength and elongation at break.
Application scenario of mbs
Because mbs has good compatibility with PVC and high impact resistance at room temperature or low temperature, it is also suitable for all kinds of opaque products. According to the data, adding MBS resin to PVC can improve the impact strength of its products, and also improve the cold resistance and processing fluidity of its products.
Therefore, MBS has been widely used as an impact modifier for PVC. In addition, it also has good coloring, and can be used to make containers, pipes, plates, indoor decorative boards and soft products. However, butadiene with unsaturated structure is easy to be aged by oxygen and ultraviolet rays, so it has poor weather resistance and is not suitable for making long-term outdoor products.