Table VI. Deep-Ocean Effects on Insulation Resistance 
of Electrical Insulating Materials 
Materials Insulation Resistance (meg) Voltage 
(IS ails Jets) Before Exposure !/ After Exposure2/ Breakeown=/ 
Polyethylene 20, 100,000 2,500,000 None 
Polyvinyl chloride 4,400,000 500,000 None 
Silicone rubber 6,200,000 850,000 None 
GR-S rubber (SBR) 5,500,000 650,000 None 
Neoprene rubber 36,000 16,000 None 
ly Average of 8 wires 
2, Average of 4 wires 
3, Tested at 1,000 volts AC for 10 seconds 
Table VII. Materials Used in the Formulation of 
Insulating Materials (15 mils thick) 
Test Specimens Plasticizer 
Polyethylene 
(Standard polyethylene 
insulation) 
Fillers Antioxidant 
Polyvinyl 
chloride (PVC) 
GR-S rubber (SBR) Cumarone-indene 
resin and micro- 
crystalline wax 
Hard clay and | Polymerized 
water-ground | trimethyl 
whiting dihydroquinoline 
Silicone rubber 
Neoprene Light process 
(Type W) oil and petroleum 
4, 4 thiobis 
(6-tert-buty| 
m-creosol) 
Hard clay 
39 
