subject: Pvc Building Materials Durability Of New Technologies To Improve The Birth-pvc Building Materials, [print this page] PVC Weathering of building materials is an important performance. It is related to the level of PVC Weathering of building materials, recently introduced two technologies abroad should learn. Are outlined below:
1, with nano-cerium oxide to improve durability in the past, in order to enhance the durability PVC material is light in the vinyl chloride resin to add benzene ketones, benzo-a yl, etc. UV absorbers . However, as UV absorbers. UV absorbers in the light and heat, because they are volatile and deterioration under the action of deterioration is difficult to make PVC building materials to maintain a high long-term durability. In addition, the deterioration of the UV absorber will undermine transparency of PVC building materials. In the vinyl resins, stabilizers, slip agents, processing aids, Modifier , Plasticizer , Filler, anti-oxidants and UV absorbers in the composition of the mixture add.
Ganami cerium oxide or use it to replace the UV absorber, can greatly improve the PVC building materials, weather resistance, to maintain good long-term mechanical strength and transparency.
Get 100 points as polyvinyl chloride (polymerization degree 1030 level), 3.9 copies of organotin stabilizers, calcium fatty acids were 0.5 and 1.0 were acrylate, methyl propionate 5 copies of a styrene butadiene-1 modifier, 0.2 were Polyethylene Add the wax mixture consisting of 1.0 copies of ceria particle size of 6nm, placed Mixer Mixed, then placed in two-roll mill at 180 for 3 minutes mixing, made of 1mm thickness of flakes. Web results will be combined film, at 180 preheating 3 minutes, 4 minutes after 5mPa pressure to suppress, the thickness of 2mm made of specimens, respectively, and the moonlight color colorimeter stick of Carbon Arc Radiation Measurement transparency and color change. The results showed that the best generation of nano-cerium oxide UV absorber, significantly improved weather resistance, transparency and color a long time remained unchanged.
2, mixed titanium dioxide can be used to improve durability PVC building materials to improve durability and hiding power, to prevent fading, and easy to color, titanium dioxide trapped in the building materials commonly used in PVC. But in the vinyl chloride resin-based material mixing add only anatase rutile type titanium dioxide in one, not yet fully improved weatherability.
Test showed that the vinyl chloride resin-based material mixing ratio of 1.3:1 to add rutile and anatase titanium dioxide mixture composed of titanium dioxide, can give full play to the role of titanium dioxide to further enhance the weathering and opacity, to prevent the bleaching effect is better. Such as rutile titanium dioxide containing only 0.54 copy of PVC samples after exposure to 200 hours aging test machine, its color will change, which contain 0.54 were rutile and anatase titanium dioxide composition of mixed composition of mixed titania PVC samples irradiated by the aging test machine for more than 600 hours, still preserving its color changes. In addition, with the incorporation of expensive resins and additives to improve weathering technology group, the mixed titanium technology, production costs lower. These two simple and feasible technology for pipe, profile, covered surfaces such as PVC building materials production.
