Curing agent and accelerator in the function and classification of rubber industry
Title: curing agent and accelerator in the rubber industry in the process of sulfide, role and classification of the long chain of rubber molecules into vulcanizing agent crosslinking reaction to form three-dimensional structure.
In practice, sulfur is almost completely used for rubber vulcanization.
Other vulcanizing agent, such as sulfur chloride, selenium, tellurium, and thiuram disulfide, used only in special circumstances.
Function: accelerate can improve the reaction rate of sulfur and rubber, lower curing temperature.
They can also reduce the analysis of the physical and technical features.
Inorganic promoter in rubber industrial history came across, inorganic compounds add rubber as colorant and filler.
In the basic of salt and metal oxide as accelerator, line, magnesium oxide, and the most common, yellow monk still have varying degrees of application, but the influence of the black limits its application of black compound vulcanizates.
Mr Boon sligo in 1906 found that the accelerating effect of aniline marks belong to many different groups of the beginning of the long term organic promoter.
These organic compounds of a very small amount, about 1% of the acceleration of these organic compounds have significant effect.
Organic promoter according to the classification of its technical effect, and was classified as the following categories: super accelerator half super promoter of medium speed promoter to activate promoter of slow promoter.
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Activator and accelerator response.
As a result, form an intermediate complex.
The compound more effectively activate the sulfur rubber mixture.
There are two kinds of activator: metal oxides and fatty acids.
Representatives of the two groups to attend at the same time.
The first group of members of one of the most common is zinc oxide, which is about 3 to 5% of the proportion, as nearly all of the rubber compound activator.
The second group including oleic acid palmitic acid, stearic acid in particular.
Their dosage is 0.
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