Pilcure ZBzDC is mainly used as a ‘nitrosamine free’ ultra fast accelerator since it is based on dibenzyl amine and forms N-nitrosodibenzyl amine on vulcanization which is not carcinogenic according to the published literature.
Pilcure ZBzDC is used as primary as well as secondary accelerator in latex and dry rubber based compounds for specialty applications (e.g. nitrosamine free products, products for food contact applications etc.).
The dosage of Pilcure ZBzDC is generally 70% higher than ZDEC and 30% higher than ZDBC to achieve equivalent state of cure since its molecular weight is higher.
Pilcure ZBzDC is effective in the presence of Zinc oxide and Stearic acid as activators of cure in dry rubber compounds. Similarly, presence of Zinc oxide is necessary in latex based compounds.
Pilcure ZBzDC disperses easily in latex as well as dry rubber based compounds and does not decompose in the absence of sulphur.
Pilcure ZBzDC can be activated by basic accelerators but retardation is difficult. Vulcanization temperatures below 135ºC are recommended for better reversion resistance.
Pilcure ZBzDC offers better processing safety as compared to other dithiocarbamate accelerators. However; necessary precautions similar to other ultra fast accelerators should be taken to avoid premature vulcanization and improved storage stability of uncured stocks.
TYPICAL DOSAGES:
Typical dosages of Pilcure ZBzDC based cure systems are given below:
TYPICAL DOSAGES OF PILCURE ZBzDC
|
Product
|
Rubber
|
Accelerator / Sulfur , phr
|
ZBzDC
|
MBTS
|
ZMBT
|
DPG
|
S
|
As primary accelerator
|
NR
SBR/NBR
|
1.0-1.5
1.5-1.8
|
-
-
|
-
-
|
0.5-0.8
0.8-1.0
|
1.8-2.0
1.5-2.0
|
As secondary accelerator
|
NR
SBR/NBR
|
0.2-0.5
0.3-0.5
|
0.8-1.2
1.0-1.5
|
-
-
|
-
-
|
2.0-2.5
1.5-2.2
|
Food Contact products
|
NR
|
0.5-1.0
|
-
|
-
|
0-0.20
|
2.0-2.4
|
Sports goods
|
NR
|
1.0-1.3
|
-
|
-
|
0- 0.5
|
1.8-2.0
|
Proofing materials
|
NR
SBR/NBR
|
1.0-1.5
1.5-2.0
|
-
-
|
-
-
|
0-0.5
0-0.5
|
2.0
1.5-2.0
|
Extruded Products
|
EPDM
|
1.0-2.0
|
1.5
|
-
|
0.8-1.2
|
1.5-2.0
|
Latex Products
|
Dipped Goods
|
NR
SBR/NBR
|
1.0-2.0
1.5-2.5
|
-
-
|
-
-
|
0.5-1.0
0.5-1.0
|
1.5-2.0
2.5-2.8
|
Foamed Products
|
NR
|
1.5-2.0
|
-
|
0.3-0.5
|
-
|
2.0
|