Rubber Antireversion Curing Accelerators

Products

Chemical Composition

Appearance

Melting Point °C

Application Characteristics  

PK900

1,3-Bis(citracon imidomethyl)benzene

Off white powder

75-90

PK900 is an antireversion curing agent for sulfur cured diene rubbers. During longer time curing and longer term service at higher temperature, the polysulfide crosslink  of diene rubber vulcanizates have to breakage to generating new conjugated diene macro molecules which can react with PK900 molecules to reunion the crosslink. Particularly for the performance needs of antireversion cases e.g. TBR tire, OTR tire, GOTR tire and  antivibration damp articles. 

TBSI

N-t-butyl-di-(2-benzothiazole) sulfenimide

White to grey powder

≥128

TBSI shows longer scorch safety, better antireversion curing, lower curing speed, higher modulus and lower HBU of NR and diene rubbers. TBSI can increase the heat stability and durability of bonding compounds of tire rubber to steel cord. The physical performance of vulcanizates is almost same with TBBS and DCBS. Suitable for the more thick section rubber products, e.g. TBR, OTR and GOTR tires.

CBBS

N-t-cyclohexyl-di-(2-benzothiazole) sulfenimide

White to grey powder

≥120

CBBS shows longer scorch safety, better antireversion curing, lower curing speed, higher modulus and lower HBU of NR and diene rubbers. To replace DCBS for the tire steel cord bonding  compounds show excellent heat resistance and service durability. Suitable for tires, belts, hoses, and other TRG articles.   

ZBOP

70% Moderate MW Zinc dithiophosphate and 30% inertial filler

White powder  

—

ZBOP is an antireversion curing agent for sulfur cured  NR and diene rubbers. As a secondary accelerator  blending with sulphenamides or thiazol. The vulcanizates have the excellent heat resistance and antireversion performance. Used with retarder CTT will improve its scorching safety in the OTR and GOTR tires and thick section rubber articles such as automotive engine mounts.

ZDOP

70% High MW Zinc dithiophosphate and 30% inertial filler

White powder

—

ZDOP is an antireversion curing agent for sulfur cured  NR and diene rubbers. As a secondary accelerator  blending with sulphenamides or thiazol. The vulcanizates have the excellent heat resistance and antireversion performance. Used with retarder CTT can improve its scorching safety in the TBR, OTR and GOTR tires and thick section rubber articles such as automotive engine mounts.