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US 4,382,112 AGranted
Flexible insulation with improved discoloration and heat age resistance
AssigneeGeneral Electric Company
InventorsJoseph E. Betts, Joseph E. Vostovich, Kenneth R. Curtis
Life of this patent
Estimating the term…
Abstract
Chlorinated polymers are employed within flexible wire insulation coatings to improve the insulation properties of the coating and to increase the coating's discoloration resistance.
Claims5
A curable composition having improved resistance to discoloration comprising the following combination of ingredients;
- ______________________________________ INGREDIENT PARTS ______________________________________ Ethylene-Propylene Polymer 100 Compatible Chlorinated Polymer 4-12 Alumina 50-150 Zinc Oxide 5-30 Parafin Wax 0-10 Antioxidant 2-10 Vinyl Silane Linking Aid 0.5-3 Peroxide Crosslinking Agent 1.5-8 Titanium Dioxide 0-10. ______________________________________
A cured composition having improved discoloration resistance after curing which comprises the following combination of ingredients:
- ______________________________________ INGREDIENT PARTS ______________________________________ Ethylene-Propylene Polymer 100 Compatible Chlorinated Polymer 4-12 Alumina 50-150 Zinc Oxide 5-30 Parafin Wax 0-10 Antioxidant 2-10 Vinyl Silane Linking Aid 0.5-3 Peroxide Crosslinking Agent 1.5-8 Titanium Dioxide 0-10. ______________________________________
A curable composition having improved resistance to discoloration which comprises the following combination of ingredients:
- ______________________________________ INGREDIENT PARTS ______________________________________ Ethylene-propylene EPDM elastomer polymers 100 Compatible chlorinated polymer Chlorinated polyethylene 6-10 Aluminum oxide 75-130 Zinc oxide 10-25 Parafin wax 2-7 Antioxidant Zinc salt of a blend of 4- and 5-methyl mercaptobenzimidazole 3-6 Tetrakis methane 1.5-3 Vinyl Silane Linking Aid 1-2 Peroxide Crosslinking Agent .alpha.,.alpha.'-bis,(t-butyl peroxy) diiso-propyl benzene 2-4 Titanium dioxide 0-5 ______________________________________
Dependencies are inferred from the claim text.