Polyvinyl chloride (PVC -u) Windows and doors profiles is made by PVC, stabilizer, impact modifier and processing aid, packing and so on according to certain formula of mixing and extrusion molding, PVC and the selection of auxiliary has a great influence on the performance of the products. As the extrusion hard PVC -u
Polyvinyl chloride (PVC -u) Windows and doors profiles is made by PVC, stabilizer, impact modifier and processing aid, packing and so on according to certain formula of mixing and extrusion molding, PVC and the selection of auxiliary has a great influence on the performance of the products. As the extrusion hard PVC -u Windows and doors profiles and plastic doors and Windows industry, the rapid development of PVC additives and related industry also have made new progress. 1 1.1 PVC resin and the selection of auxiliary production PVC -u doors and Windows profiles, generally use of loose type PVC production suspension method (SG - 5).
Specifically, in the production of PVC material, appropriate chooses oil pyrolysis production of vinyl, had better not production by calcium carbide method. 1.2 heat stabilizer (1) heat stabilizer of common varieties lead class heat stabilizer In lead type of thermal stabilizer, three base thermal stability of lead sulfate is best, the most widely used; Dibasic lead phosphite significantly, thermal stability and resistance to initial coloration also give good weather resistance, and two base lead stearate and thermal stability of lead stearate is a bit poor, but strong lubricity. Lead salts are the biggest disadvantages of toxicity, and easy to change color appearance. Lead class heat stabilizer is the focus of the development of eliminating dust pollution, the development of composite lead salt.
Nanjing, wenzhou, chongqing is the three big domestic clean composite lead salt production base, production is mostly cooperate with ester lubricant, when products are granular, flake, can well solve the problem of dust pollution. Metal soap stabilizer According to its function and mechanism of points is given priority to, auxiliary. Main metallic soap stabilizer is given priority to with Cd, zinc, auxiliary metallic soap stabilizer is given priority to with Ba, Ca, main and auxiliary metallic soap, has a synergistic effect, representative is Ba - CDS, Ba - zinc and Ca - zinc. Domestic commonly used for Ca - zinc and Ba - zinc system. Shandong zhaoyuan chemical technology introduced from American Ferro company built in 3000 t/a composite metal soap device, PVC Window Machine can produce 260 grades, including Ca, zinc, Ba, Cd, composite metal soap products.
Organotin stabilizer Organic tin stabilizer consists of sulfur-containing organic tin and organotin carboxylates. Organic auxiliary stabilizing agent Organic auxiliary stabilizer and metal salt stabilizers and usually produce synergies. Mainly including phosphite ester, epoxy compound, polyol, sulfur auxiliary stabilizers, beta diketone auxiliary stabilizing agent. The rare earth stabilizer Rare earth stabilizer is our newly developed a new type of thermal stabilizer, and cheap, non-toxic, high performance, good transparency, storage stability, excellent weatherability, etc.
The actual use of rare earth stabilizer is usually rare earth organic mixed with metal calcium, or zinc compounds. Rare earth stabilizer in recent years in our country is developing very quickly. Changshu synthetic chemical plant with
We fine chemical factory developed L518 rare earth - zinc stearate is a composite heat stabilizer, wide range of USES. Fuzhou ErQing industry developed by research institute of rare earth compound stabilizer, transparency is close to the organic tin products, alternative cadmium stearate for non-toxic products. Guangdong university of technology and development of rare earth complex heat stabilizer RHS - 2 non-toxic, alternative Ba - Cd. Beijing huatong hair technology development company development system of the thermal stability of composite processing AIDS has formed the production capacity of 5000 t/a.