What are the factors and solutions that affect the rebound and vulcanization speed of silicone hose compound? First of all, the vinyl content in the rubber is not enough or the vinyl content distribution of the raw rubber itself is uneven, so that the rubber does not reach the positive sulfur point during vulcanization, the vulcanization speed is too long and the vulcanization is not sufficient, resulting in poor elasticity of the rubber.

terms of settlement:

1、 The problems of poor resilience and slow curing speed can be solved by increasing the total content of vinyl in silicone hose compound and adding an appropriate amount of hydrogen silicone oil into the formula to reduce the amount of filler and improve the content of silicone hose compound; Different types of raw rubber with vinyl content and a small amount of high vinyl raw rubber can also be used to control the permanent deformation of silicone hose rubber, find the best balance point, avoid the brittleness of silicone hose rubber, and improve the elasticity of silicone hose rubber. Because the compound is acidic due to the acidity of silica itself and the acidity of structure control agent, the acidic compound can delay the vulcanization and reduce the high temperature resistance.

2、 The acid content of silicone hose compound can also be increased by adding appropriate weak alkaline substances. The pH value of silicone tube compound is generally in the neutral or weak alkaline range, which is conducive to improving the elasticity and vulcanization speed.

3、 Raw rubber with narrow molecular weight distribution and certain volatility can be selected to improve the demoulding rate of silicone hose compound and reduce the amount of plasticizer; The surface of white carbon black is treated with alkoxysilane and used in combination with hydroxyl silicone oil. The two-step method is used to make the combination reaction time between silica molecules and raw rubber molecules, and reduce the structure control agent through vulcanization, so as to improve the resilience and vulcanization speed of silicone hose compound.

In addition, establishing a standard curing curve for each compound is also a means to control the stable production quality of the compound.