Platinum catalyst is a kind of catalyst with high activity and high catalytic efficiency in silicone rubber curing. Platinum catalyst can efficiently catalyze the addition reaction of Si-Vi and Si-H without side reaction. Besides, platinum catalyst also has the advantages of good stability and strong anti-toxic, which can avoid the formation of black substances in the process of storage or use, and reduce the influence of nitrogen and sulfur-containing substances.

In addition to the above advantages, platinum catalyst material also has the advantages of good selectivity, less by-product, little influence on the transparency of the compound, high transparency products and eco-friendly chemical feature. Platinum catalyst has no toxic gas release in the vulcanization process.

 

The application fields of platinum catalyst are given below:

 

 

  1. Platinum catalyst can be used as a catalyst for liquid addition silicone rubber, silicone gel,
    addition molding compound, electronic potting adhesive, silica gel ink and so on.
  2. Catalysts for synthesis of polyether silicone oil, amino silicone oil, etc.
  3. Other applications of hydrosilylation reaction.
  4. Paper separator
  5. Modified organosilicon


The main factors for the catalyst.

  1. Valence state of platinum: zero-valent platinum is the most active. Sometimes, there is a small amount of Pt2+.
  2. The existence of oxygen or not: oxygen can accelerate the hydrosilylation reaction. From the hydrosilylation reaction mechanism, oxygen is the promoter.
  3. The effectiveness of inhibitors and retarders is based on the production needs to apply to inhibit or delay the hydrosilylation reaction. (G
  4. enerally organic peroxides, methyl isobutyl alcohols, other low boiling ethynyl alcohols, tetravinyl tetramethyl cyclotetrasiloxanes, and nitriles)
  5. Dosage of inhibitor or retarder: 1-5% of liquid silicone rubber. In order to slow down or stop the platinum sulfurization process, 1-3 drops of the inhibitor are
    added to 100 g of polymer.(Note: Common inhibitors and Retardants: vinyl siloxane, ethynol, dimethylfumaric acid. However, vinyl methylcyclosiloxane is the most convenient one to use, which is odorless, stable, and easy to store.)