NR 40-45ShA formulation?
NR 40-45ShA formulation?
(OP)
HEllo, i´m noob in this site... and my english is very poor XD
I need that somebody send to me a formulation of a NR compound, whith hardness= 40-45 Sha and 14 MPa Tensile strengh ... I need that this compound with a high viscosity
Other compounds of this type ,with low viscosity, originate a lot of dirt in our molds ..and i need a fast aceleration!!!
thank you very much
I need that somebody send to me a formulation of a NR compound, whith hardness= 40-45 Sha and 14 MPa Tensile strengh ... I need that this compound with a high viscosity
Other compounds of this type ,with low viscosity, originate a lot of dirt in our molds ..and i need a fast aceleration!!!
thank you very much





RE: NR 40-45ShA formulation?
SMR10 100.00
N330 1.00 (yes, just 1.00phr)
Whiting 50.00
Process oil 10.00
Zinc oxide 3.50
Stearic acid 1.00
Flectol H (TMQ) 1.00
Sulphur 1.50
MBTS 1.50
TMTD 0.15
Mooney viscosity = 60.
Curing test specimens at 150°C for 20mins should give you the following properties:
Tensile = 17.5MPa, EB = 660%, Shore A = 42°, Compression set (1 day at 70°C) = 11%.
Could the "dirt" be nothing more than mould fouling? This will always occur with ZnO/sulphur systems. The literature shows that most fouling is caused by a build up of zinc sulphide.
Graham Bennett
Tun Abdul Razak Research Centre.
www.tarrc.co.uk