Introduction to PVC Foam Boards Two technologies that improve the weatherability of PVC building materials
PVC foam board is a kind of PVC building materials. One of the most important technical indicators of PVC building materials is weather resistance, and how to improve the weather resistance of PVC building materials has become an important research project. At present, foreign countries have introduced two technologies to improve the weather resistance of PVC building materials, namely, to improve the weather resistance with nano-grade yttrium oxide, and to improve the weather resistance with mixed titanium oxide. Next, let's give you a detailed introduction to these two technologies.
The first is to improve the weather resistance of PVC building materials with nanometer cerium oxide. In order to improve the weather resistance of PVC building materials, ultraviolet absorbers such as benzophenone and benzotriazole have been added to vinyl chloride lamps. However, ultraviolet absorbers are deteriorated due to light and heat, and it is difficult to make them deteriorate. PVC building materials maintain high weatherability for a long period of time, and deteriorated UV absorbers also impair the transparency of PVC building materials. Nowadays, nanoscale cerium oxide is added to or replaced with UV absorbers in blends of vinyl resins, lubricants, stabilizers, modifiers, processing aids, plasticizers, fillers, antioxidants, and UV absorbers. The agent can greatly improve the weather resistance of the PVC building material, so that it can maintain good mechanical strength and transparency for a long time.
Second: The use of mixed titanium oxide to improve the weather resistance of pvc building materials. The use of titanium oxide can improve the weatherability and hiding power of PVC building materials, it can also prevent fading, and it is easy to color, so titanium oxide is commonly used in PVC building materials. However, at present, the addition of only one of rutile type anatase titanium oxide to a vinyl chloride resin-based blend cannot sufficiently improve its weatherability.