Shanghai Dayton tell you: How to find the perfect vulcanizat

Entry Shanghai Dayton more than a year, from the original ignorant of the chemical industry, to a smattering of knowledge, to understand, to a certain product is now relatively proficient, this road is very long, in order to achieve a an industry truly professional, proficient, it may take years, decades or even a lifetime, the United States today than Haydn vulcanization accelerator, for example, in the choice of the vulcanization accelerator, how to find the ideal accelerator.

Classification accelerator varied, but in daily chemical applications, accelerant classification of commonly used classification chemical structure similar to the structure of the agent to act to promote similar. According to the chemical structure classification can be divided into: thiazole, sulfenamide, thiuram disulfide amino gallates, guanidines, thioureas, xanthan acids and aldehydes amines.

Ideal promoter should have the following characteristics:

1, scorch long time, that is before the vulcanization process safe. Above accelerator TMTM Haydn beauty class, TMTM natural rubber and synthetic rubber promoting agent, curing temperature is 121 degrees, excellent scorch resistance.

2, curing time is short, requiring vulcanization started fast, high production efficiency. Haydn accelerator DM more than the United States, for example, natural rubber, reclaimed rubber for general-purpose accelerator. Its high critical temperature curing (130 ℃), the temperature increase in the activity of more than 140 ℃, a significant aftereffect.

3, curing curve flat, the flat long curing time, non-sulfide reduction. Thiazole vulcanization accelerator curve of a certain flatness, such as the United States and Haydn accelerator D, accelerator DM.

4, non-toxic, non-polluting. Such as Shanghai to promote the accelerator TMTM agent of Dayton, accelerator TRA and the like.

In practice, the vulcanization accelerator and other auxiliary systems join rubber, vulcanized before mixing, extrusion process and a series of coke should absolutely not happen, in the curing process should be as far as possible in the short time to finish off a cross-linked. In addition, regardless of how long to extend the cure time, the physical properties of vulcanized rubber should not be lowered. But has yet to find the accelerator all the varieties meet the above conditions, only sulfenamide accelerators ideal.