Dimethyl silicone oil has many outstanding characteristics, so it is widely used in various sectors of industrial and agricultural production, national defense industry, scientific research and medical and health departments.Dimethyl silicone oil is divided into: high temperature vulcanized silica gel, room temperature vulcanized.After high temperature vulcanization dimethyl silicone oil yellow how to do? 

    High temperature silicon sulfide dimethyl silicone oil usually need to carry out the second stage of vulcanization to eliminate the decomposition of the oxide residues, silicone rubber is further crosslinking to achieve the best physical properties.The second stage vulcanization makes dimethyl silicone oil glue yellow, transparency decreased, directly affecting the appearance of the product, the scope of application is limited in food, medical and solar photovoltaic industries.

    Causes of dimethylsilicone oil yellowing are also different, some believe that the production of dimethylsilicone oil raw materials and additives contain trace metal elements and NO-3 caused by;Some think it is the decomposition of dialkylperoxides and acetone, resulting in α hydroxybutyraldehyde condensation, dehydration, the generation of conjugate compounds caused by;It is also believed that silica pH value affects the yellowing of silicone rubber.But at present, the main solution to the yellowing of dimethyl silicone oil is to consider the three aspects of raw rubber, white carbon black and additives

    The following are several ways to improve the yellowing of silicone rubber:

    1. Add a kind of anti-yellowing paste double 2,5 vulcanizing agent, there is a high amount of hydrogen silicone oil, promote silicone rubber anti-yellowing effect has been significantly improved, improve the transparency of dimethyl silicone oil, prevent vulcanizing agent splatter.

    2. Adding organic surfactants in silica to control the size of secondary particles, under the action of compound anti-yellowing agent, effectively control the degree of yellowing of dimethyl silicone oil.

    3. Add a kind of anti-yellowing agent called pyrophosphate, on the basis of not reducing the physical and mechanical properties of mixed rubber, enhance the ability of mixed rubber to resist yellowing.

    Dimethylsilicone oil should be stored in a ventilated, dry warehouse, to prevent direct sunlight, and should be isolated from fire.Dimethylsilicone oil will not be absorbed by the digestive system, no irritation to the skin, slight irritation to the cornea, but no harm.When used in operation, no protective measures need to be taken.You can solve the problem of dimethylsilicone oil yellowing through the above methods.