1.Combined with peroxide vulcanization, it can be used as bridging agent to improve bridging density, improve tensile strength, reduce compression deformation and shorten vulcanization time.
Ingredients: (Trimethylolpropane trimethylacrylate)
Package: 25kg / bag
Appearance: White powder
Content (%): ≥69
Density (g / cm) ³£©: 1.25
Refractive index (nd25 ¡æ): 1.468-1.478
Acid value (mgKOH / g): ≤0.2
Moisture (%): 0.2
Application:
1. rubber active agents Combined with peroxide vulcanization, it can be used as bridging agent to improve bridging density, improve tensile strength, reduce compression deformation and shorten vulcanization time.
2. rubber active agents have plasticizing effects during mixing and hardening effects after vulcanization. It can be used as a hardener for high hardness products. About 1 PHR PL400 for each increase in hardness can increase one degree.
3. Improve the crosslinking efficiency and reduce the use of peroxide of rubber active agents from China factory.
Dosage:
1. In general rubber as co-gluing agent (bridging agent), it is recommended to add 2-4PHR
2. In EVA foam products, it is recommended to add 0.5-1.0PHR
3. In high hardness products, it is recommended to add 10-30PHR
The active agent can increase the activity of the accelerator in the formulation of rubber products, and then achieve the purpose of reducing the amount of the accelerator and shortening the vulcanization time. The active agents commonly used in the production of rubber products are divided into inorganic and organic, inorganic active agents are mainly zinc oxide, magnesium oxide and lead oxide are more common; the most commonly used organic active agent is stearic acid, other weak acids, polymeric alcohols, and amino alcohols are also used. In actual production, different rubber products need to be combined with different varieties and different amounts of active agents.
Rubber active agents in rubber product formulations can play a role in activating the vulcanization system, improving the crosslink density and aging resistance of vulcanized rubber, and the addition of a small number of active agents can also significantly improve the vulcanization strength and heat resistance of vulcanized rubber HYL6Y7Y2Y. In actual production, the commonly used inorganic active agent – zinc oxide in the production of rubber products has multiple roles of vulcanization, reinforcement, and capacitation.
The most commonly used active agents in the production of rubber products are zinc oxide and stearic acid. The amount of zinc oxide is generally controlled at 2-5 parts; to improve the heat resistance of rubber, the amount of zinc oxide is usually more than 5 parts. The amount of stearic acid in the formulation of rubber products is generally controlled at 1-4 parts. In actual production, stearic acid can play the role of lubricant, on the one hand, to reduce the viscosity of rubber, and on the other hand, to promote the dissolution of zinc salts; too much stearic acid will play the role of delayed vulcanization.
Metal zinc oxide and stearic acid will produce salt-stearate during the vulcanization of rubber, and this zinc salt has a large solubility in rubber. The chelation of zinc salts with cross-linked bonds protects the weak bonds in the rubber molecules, allowing the rubber to form short cross-linked bonds during vulcanization and then increase new cross-linked bonds and the rubber cross-link density increases. Zinc oxide or zinc salts and vulcanized rubber of multi-sulfur cross-linking reaction will make the sulfur atoms in vulcanized rubber reduced, the presence of zinc oxide can reduce the rate of stress relaxation of vulcanized rubber, and then improve the thermal stability of vulcanized rubber.
In actual production, when zinc oxide and stearic acid are added in sufficient amounts, the zinc salt reacts with the accelerator to obtain rubber with full cross-linking, fast vulcanization speed, and high performance. Rubber can be divided into three categories: natural rubber, synthetic rubber, and recycled rubber. Different varieties of rubber can be used alone or with other rubbers, and the appropriate amount of active agent can further improve the mechanical properties of vulcanized rubber and enhance the comprehensive index of finished products.
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