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WESTCO CTP is an anti-scorching agent for both NR and SR rubber. It is a pre-vulcanization inhibitor. It provides predictable scorch control in most sulphur vulcanization and improved cost performance through marginal stock recovery, single-stage mixing, higher processing and/or curing temperatures. Crystals provide free flowing and non dusting characteristics.

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ACMETARD RE is highly essential for rubber compounds based on NR, IR, SBR, BR & NBR for improved processing characteristics. It is widely used in tyre compounds formulations involving sulphenamide accelerators systems. It can also be used as replasticizing agents for rubber compounds which either have been subjected to high temperatures for a long period during processing or stored for a long time under different fluctuating ambient temperatures and therefore can not be processed further or shaped without the risk of scorching.

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Dicyclohexyl Disulfide

Dicyclohexyl Disulfide Cas NO : 2550-40-5 Purity : 90.5%% Molecular Formula: C12H22S2 Molecular Weight: 230.43 Packing: 200kg/drum Uses: used in synthesis of pharmaceuticals, pesticides, dyes and other organic compounds

Zinc Dibenzyldithiocarbamate

Zinc dibenzyldithiocarbamate is a very fast primary or secondary accelerator for NR, SBR, IIR, EPDM and for natural and synthetic latexes. It provides excellent prevulcanization resistance in latex compounds. It has the best scorch resistance among zinc dithiocarbamate accelerators.

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N-(Cyclohexylthio)phthalimide is a high effective pre-vulcanization inhibitor.It is applied in NR,SBR,BR,IIR,CR,EPM,EPDM,NBR with cure system consisting of sulfur and Thiazole but mainly Sulphenamide Accelerator.It is used in natural rubber and synthetic rubber. It may protect effectively the rubber material from scorching during Processing, so that to make it possible for extruder and calender to be running at a high temperature and high speed and improve the production the storage stabilizztion of the rubber material,protect natural vulcanization during storage.

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Rubber Antiscorching Agent CTP(PVI) Industrial Grade

Chemical Name  N-(cyclohexylthio)Phthalimide

Molecular Structure

Molecular Formula  C14H15O2SN

Molecular Weight  261.34

CAS No. 17796-82-6

Specifications Q/KES274-2007





   White or light-yellow crystals powder

Assay                    (%)Min


Initial Melting Point         (℃)Min.


Heat Loss               (%)Max.


Ash                      (%)Max.


Toluene undissolved matter  %MAX



Properties  Density :1.25~1.35g/cm3 ,soluble in gasoline, benzene, acetone and etc. Insoluble in water.

Applications It is a high effective pre-vulcanization inhibitor. It's applied in NR, SBR, BR, IIR, CR, EPDM, NBR with cure system consisting of sulfur and Thiazole but mainly Sulphenamide Accelerator. Even a small addition of this products to rubber compounds. PVI is regulated for use in articles in contact with food as specified under FDA 21 CFR 177.2600 and under BGVV XXI, Categories 3-4.

Storage  Store closed containers in a cool, dry, well-ventilated area. Avoid exposure to direct sunlight.

Packing  25kg net paper bags lined with polyethylene film bags.

Predispersed Rubber Chemical CTP-80 Masterbatch Industrial Grade 98%

Predispersed Rubber Chemical CTP-80 Masterbatch

Product description
Composition 80% N-(cyclohexylthio) phthalimide,
20% EPDM binder and dispersing agents
Appearance Beige granules
Density,20 oC Approx. ~ 1.23 g / cm3  (20oC)
Physiological properties :  See safety data sheet (MSDS)
Raw material characteristics of CTP:
Melting point 85 oC Evaporation loss ≤ 0.5 %
CTP content ≥ 98% Sieve residue 63µm ≤ 0.1 %
Ash content ≤ 0.4 % 

Use Characteristics Konson® CTP-80 retards the onset of cure in NR and diene sythetic rubber without considerably extending the total curing time. It is preferably used with sulphenamide or thiazole accelerators to improve processing safety, keeping the properties of the vulcanizate unchanged. Konson® CTP-80 significantly improves the storage stability of uncured diene rubber compounds. When Konson® CTP-80 is used in the compounds, it is possible to process the rubber compounds at higher temperatures, thereby ensuring full use of machine capacity. Contact staining does not occur. Konson® CTP-80 causes only very slight discolouration in bright or white articles.

Processing Advantages The thermoplastic, excellent compatible EPDM/EVA binder which is combined with active dispersing promoters allows much more easily and quickly incorporation and excellent dispersion in the rubber mixing. In this way, optimal activity of the effective CTP is assured.
Dosage levels Normally 0.2 - 2.0 phr
Applications Compounds based on synthetic diene rubber and natural rubber, which are mainly cured with  thiazole and sulphenamide accelerators (e.g. in the production of tires, conveyor belts, soles, technical moulded and extruded articles.
Packing   Net 25 kg cartons with plastic inner.
Storage stability In original closed containers under cool and dry conditions max. 2 years.
Handling Consult material safety data sheet (MSDS) for additional handling information.

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