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Plus molding silicone rubber Manufacturers china features
Release time:
2022-04-11 15:39
Do you know what the characteristics of plus molding silicone rubber Manufacturers china are? Let’s take a look at it briefly below!
Two-component addition type RTV silicone rubber is divided into elastic silicone gel and silicone rubber. The former has lower strength and the latter has higher strength. Their vulcanization mechanism is based on the addition reaction (hydrosilation reaction) between the vinyl group (or propylene group) on the end group of the silicone raw rubber and the silicon hydrogen group on the cross-linking agent molecule.
In this reaction, a hydride-functional polysiloxane is used as a crosslinking agent (vulcanizing agent) and chloroplatinic acid or other soluble platinum compounds are used as catalysts.
The vulcanization reaction is carried out at asphyxiant temperature. No by-products are released. Since no low-molecular substances are released during the cross-linking process, the addition type RTV silicone rubber does not shrink during the vulcanization process. This type of vulcanizate is non-toxic, high mechanical strength, has excellent hydrolytic stability (even under high pressure steam), good low compression set, low flammability, deep vulcanization, and vulcanization speed can be controlled by temperature, etc. Therefore, it is a type of silicone rubber that is vigorously developed at home and abroad.
The packaging method of the addition room temperature vulcanized silicone rubber is generally divided into two components: M and N: the catalyst and the vinyl group-containing silicone polymer are used as one component; the hydrogen-containing polysiloxane cross-linked Chain agent as another component.
The above is a brief introduction to the knowledge about the characteristics of molding silicone rubber Manufacturers china.
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