Zinc salts of ethyl, isopropyl, and butyl xanthates are prepared
in the laboratory, and the effect of these xanthates with zinc diethyl
dithiocarbamate (ZDC) on the vulcanization of HAF-filled nitrile butadiene
rubber (NBR) compounds has been studied at different temperatures. The cure
times of these compounds have been compared with that of NBR compounds
containing TMTD/MBTS. The rubber compounds with the three xanthate
accelerators and ZDC are cured at various temperatures from 60 to 150°C.
The sheets are molded and properties such as tensile strength, tear strength,
cross-link density, elongation at break, compression set, abrasion resistance,
flex resistance, etc. have been evaluated. The properties show that zinc salt
of the xanthate/ZDC accelerator system has a positive synergistic effect on the
cure rate and mechanical properties of NBR compounds.
Zinc salts of ethyl, isopropyl and butyl xanthates were prepared in the laboratory. The
effect of these xanthates with zinc diethyldithiocarbamate (ZDC) on the vulcanization
of HAF filled NR compound has been studied at different temperatures. The
rubber compounds with the three xanthate accelerators and ZDC were cured at various
temperatures from 60°C to 150°C. The sheets were moulded and properties such as tensile
strength , tear strength , cross-link density, elongation -at-break, compression set, heat
build up, abrasion resistance, flex resistance , etc. were evaluated . The properties
showed that zinc xanthate/ZDC accelerator combination has a positive synergistic effect
on the mechanical properties of NR compounds. The curing of HAF filled NR compound
containing zinc xanthate /ZDC is slightly slower than the curing of the corresponding gum
compounds . It is observed that, by gradually increasing the amount of the accelerator, the
cure time of black filled NR compound can be made equal to that of the gum compou
Rani, Joseph(John Wiley & Sons, Inc., March 20, 2000)
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Abstract:
ABSTRACT: Zinc salts of ethyl, isopropyl, and butyl xanthates were prepared in the
laboratory. They were purified by reprecipitation and were characterized by IR, NMR,
and thermogravimetric analysis techniques. The melting points were also determined.
The rubber compounds with different xanthate accelerators were cured at temperatures
from 30 to 150°C. The sheets were molded and properties such as tensile strength,
tear strength, crosslink density, elongation at break, and modulus at 300% elongation
were evaluated. The properties showed that all three xanthate accelerators are effective
for room temperature curing.