Heat resistant ethylene-propylene rubber with improved tensile properties and insulated conductor product thereof
AssigneeGeneral Electric Company
InventorJoseph E. Vostovich
Life of this patent
Estimating the term…
Abstract
A cross-link curable ethylene-propylene rubber composition with improved tensile and related properties and resistance to heat, the cured rubber composition and electrical conductors indulated with said cured rubber composition. The improved rubber composition comprises a combination of ethylene-propylene rubber, chlorosulfonated polyethylene, finyl silane, antimony oxide, peroxide and a combination of antioxidants, zinc oxide, talc and carbon black in particular proportions.
Claims6
A curable ethylene-propylene rubber composition having improved tensile and related physical properties, resistance to heat and apt electrical and physical properties, consisting essentially of the combination in approximate parts by weight of:
- Ethylene-propylene rubber 100
- Talc-hydrated magnesium silicate 50-125
- Vinyl silane 0.5-3
- Thermal carbon black 10-32
- Reaction product of acetone and diphenylamine 1-2.5
- Zinc salt of 2-mercaptotolylimidazole 0.2-3
- Chlorosulfonated polyethylene 3-10
- Antimony trioxide 3-10
- Zinc oxide 15-25
- Dicumyl peroxide curing agent 2-8
- Polybutadiene homopolymer 2-5
A curable ethylene-propylene rubber composition having improved tensile and related physical properties, resistance to heat and apt electrical and physical properties, consisting essentially of the combination in approximate parts by weight of:
- Ethylene-propylene copolymer 50.
- Ethylene-propylene-diene-terpolymer 50.
- Talc-hydrated magnesium silicate 76.
- Vinyl silane 0.77
- Medium thermal carbon black 30.4
- Reaction product of acetone and diphenylamine 2.
- Zinc salt of 2-mercaptotolylimidazole 0.5
- Chlorosulfonated polyethylene 5.
- Antimony trioxide 5.
- Zinc oxide 20.8
- Dicumyl peroxide curing agent 98-100% active 4.71
- Polybutadiene homopolymer 3.
Dependencies are inferred from the claim text.