U.C.C.L. RUBBER PROCESS AND EXTENDER OILS .
In the rubber industry the petroleum oils are mainly used as:
RUBBER PROCESS OILS (used by manufacturer of finished rubber product, to aid processing) and RUBBER EXTENDERS OILS (used by raw material manufactures to soften polymers).
Extender oil by swelling the polymer and by providing lubrication between rubber molecules softens the stiff rubbery polymers.
By adding extender oils the molecular weight, viscosity & solvency of the base polymers can be varred & because of oil content more additional ingredients can be blended.
Process oils assist in the mixing operation, reduces compounding time, improve processability and modify the physical properties of the finished product.
New rubber compounding process requires high speed mixing & short mixing times & proper polymer consistancy for rapid processing. Process oils can aid to optimize these conditions, the compounder can achieve a workabel mass with good dispersion of fillers by selecting correct process oil.
Process oils as well as other ingredients (like wax) import an oiliness to the rubber mass that helps prevent sticking to calender & tube machine dies. It is particularly important in extrusion & injection moulding were output & rejection rates are adversely affected by a sticky non- uniform formulation.
Since the primary plasticizers in pvc leather cloth manufacturing are costly, process oils may be used as secondary plasticizers to reduce cost.
|
Kind of Rubber |
Paraffinic Group. |
Naphthenic Group. |
Aromatic Group. |
|
Natural Rubber |
Good |
Good |
Extremely Good |
|
Synthetic Rubber |
Good |
Specially Good |
Extremely Good |
|
Neoprene |
Inferior |
Extremely Good |
Extremely Good |
|
Butyl Rubber |
Good |
Good |
Good |
|
Nitrile Rubber |
Inferior |
Good |
Good |
|
Features |
The property of extension, low
Temperature, anti-pollution, anti-aging is good but the compatibility and working |
The property of anti-pollution,
Low temperature, anti-tension,
Elasticity, extensibility and
anti-abrasion is good |
The property of compatibility,
Anti-exudation, working is good, but the property of low temperature, anti-pollution is bad comparatively |
TECHNICAL SPECIFICATIONS
PARAFFINIC RUBBER PROCESS OIL.
PARAMETERS |
SPECIFICATIONS |
|
SPECIFIC GRAVITY @ 15/15c |
0.886 0.888 |
|
APPEARANCE |
YELLOW COLOUR |
VISCOSITY KINEMATIC
@ 100 c
@ 40 c |
10 11
94 108 |
|
VISCOSITY INDEX vi |
93 100 |
|
FLASH POINT |
205 210 |
|
STRONG ACID( mineral acid ) |
mg , KOH nil |
|
TOTAL ACID (organic acid) |
mg, KOH gr 0.03 0.05 |
|
POUR POINT |
gr ( c ) 0 2 |
|
COLOUR |
3 ¼ - 4 |
