Characteristics and main varieties of various accelerators

1. Thiazoles

Thiazoles (acid) accelerator curing speed, curing curve flat, curing rubber comprehensive performance is good, has good aging resistance, a wide range of applications, suitable for natural rubber and various synthetic rubber, suitable for acidic carbon black, and furnace method with carbon black must pay attention to the risk of burning.

Main varieties: promoter M, DM, MZ

Rubber accelerator price

2. Secondary sulfonamides

Secondary sulfonamide accelerators and thiazoles in the same place is the same promoting group, but more than thiazoles an anti-coke base and activation base. The promoter is acidic, the activation base is alkaline, so the secondary sulfonamide accelerator is a kind of acid and base self-use accelerator, it has the advantages of thiazole accelerator, and overcome the shortcomings of short burning time. Its characteristics

(1) Long induction period, fast curing speed, flat curing curve, vulcanizing adhesive comprehensive performance is good;

(2) It should be matched with furnace carbon black, which has full safety and is conducive to the full fluidity of extrusion, calendering and pressing rubber material;

(3) Suitable for high temperature fast vulcanization and thick product vulcanization;

(4) An activated secondary sulfonamide sulfide system was formed by combining with acid accelerators.

Main varieties: accelerator CZ, NOBS, NS (TBBS), DZ

3. Tyuram class

Thiuram accelerators consist of two active bases and two accelerators, so the curing speed is fast, burning time is short, is a kind of overspeed acid accelerator. Special attention should be paid to scorch tendency when applied.

Main varieties: accelerant TMTD, TMTM, TRA

4. Dithiocarbamates

Dithiocarbamate accelerators have a faster vulcanization rate than thiuram accelerators, which is a super superspeed acid accelerator. Its induction period is very short, used for room temperature vulcanization and vulcanization of latex products, also used for butyl rubber, ethylene propylene diene rubber vulcanization, it gives vulcanization excellent aging resistance.

Main varieties: accelerator PX, ZDC, ZDMC

5. Guanides

Guanidine accelerators are active bases without promoting bases and other functional groups, so the curing start is slow, the operation safety is good, the curing speed is slow. Suitable for vulcanization of thick products, improve the constant elongation stress of sponge. Guanidine accelerator is easy to make the product aging crack, discoloration pollution.

Main varieties: Accelerator D (DPG)

6. Thiourea

Thiourea accelerators have low promoting efficiency and poor anti-coke performance. Except for chloroprene rubber for promoting and crosslinking function, other rubber is rarely used.

Main varieties: Accelerator NA-22 (ETU)

7, aldehydes amines

Aldehydes and amines accelerator is a condensation of aldehydes and amines, is a weak alkaline accelerator, vulcanization rate is slow, no risk of burning, generally used as a second accelerator, and other accelerators.

Main varieties: Accelerator H

8. Xanthan acids

Xanthan acid accelerator is a super speed acid accelerator, its vulcanization rate is faster than that of dithiocarbamate, in addition to low temperature glue and latex industrial use, generally are not used.