The application and dosage of antioxidants in plastics
1, the application in polypropylene:
In general, the processing temperature of polypropylene is 220-280 ℃, if not add antioxidants, thermal degradation will occur at the processing temperature, so that its melt index increases. The antioxidant system commonly used in industry is mainly phenols with high relative molecular mass, such as 330,1010,1076, etc.. The dosage is 0.05~0.25%, often used together with calcium stearate.
2、Application in polyethylene:
High molecular weight hindered phenols, such as antioxidants CA, 330, 1010, 1076, etc. Antioxidant 1076 is generally used in high-density polyethylene. If the processing temperature is very high, it is recommended to select 1010 and phosphoric acid antioxidants. For chemical cross-linked polyethylene can be used thiobisphenol and polymerized quinoline dioxide derivatives, etc. Dosage 0.1~0.25.
3, in the application of styrene plastics:
Polystyrene is more sensitive to the effect of light oxidation. After oxidation, products appear yellowing and brittle phenomenon, the use of 3-(3,5 a di-tert-butyl-4-hydroxybenzene propionic acid) octadecyl not only has antioxidant effect, but also has anti-photo-oxidation effect. If you add the right amount of UV absorbers, the synergistic effect is better. Dosage 0.1~0.2%.
4、Application in ABS resin;
Phosphite ester can be used with phenolic antioxidants, 1076,1010,2246,246. or add DLTP (dodecyl thiodipropionate), TNP (trinonyl phenyl phosphite), etc.
Ltd. and Shandong Sanfeng New Materials Co., Ltd. held the launching ceremony of 2021 "Quality Month" activities in front of Sanfeng Chemical Technology Center Building and Sanfeng New Materials Integrated Office Building respectively on September 1, 2021 around the theme of "Strengthening Quality Consciousness and Promoting Quality Development".
Recently, Linyi City, Shandong Province, Sanfeng Chemical Co., Ltd. launched the second phase of the antioxidant green integration project of Sanfeng New Materials, which is located in the Chemical Industry Park of Linyi City Lingang Economic Development Zone.
In order to enhance the awareness of fire safety and the ability of self-prevention and self-rescue, as well as to strengthen the team spirit of employees and create a healthy, harmonious and united working atmosphere, Sanfeng New Materials organized a firefighting skills competition in the winter "Safety Production Month" at 9:30 a.m. on November 23, 2020 at the west side of the main road of the company's production complex. Competition activity.
At 10:16 a.m. on March 21, 2020, Sanfeng New Material 2#168 project started the groundbreaking ceremony. During the ceremony, Feng Shangti, Yuan Xiaogang, Li Xinmin, Tan Zhouli, leaders of the group company, as well as Guang'an company and the supervisor of the relevant site managers attended the groundbreaking ceremony.
In order to further enhance the awareness of production safety among employees, and at the same time strengthen the team spirit of employees, enhance the friendship among employees and create a harmonious and beautiful working environment, Shandong Sanfeng New Materials Co., Ltd. organized a competition of "Production Safety Month" in 2021 at 9:30 a.m. on June 21, 2021 on the west side of the main road of the production complex.