Magnet wire for hermetic motors
AssigneeRea Magnet Wire Co., Inc.
InventorsHarold R. Otis, Charles E. Blake
Life of this patent
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Abstract
A magnet wire suitable for use in hermetic motors comprising a conductor wire, an insulating intermediate layer, a polyamide outer layer, and an organic polymeric lubricant coating on the outer layer. The lubricant has a pour point below about 15.degree. F. (-9.degree. C.) and wets the outer layer. A preferred lubricant is soluble in monochlorodifluoromethane and in dichlorodifluoromethane, and comprises a saturated C.sub.2 -C.sub.4 ether of ethylene oxide and 1,2-propylene oxide copolymers. A particularly preferred lubricant has a viscosity of about 100 to 400 SUS (21 to 87 centistokes) and a pour point of about -60.degree. F. (-51.degree. C.).
Claims7
A magnet wire suitable for use in an hermetic motor environment comprising
- a conductor wire;
- an insulating intermediate layer adjacent and exterior to said conductor wire;
- a polyamide outer layer adjacent and exterior to said intermediate layer, said polyamide being selected from the group consisting of polyundecaneamide, polydodecaneamide, and mixtures and copolymers thereof;
- and
- an organic polymeric lubricant adjacent and exterior to said outer layer, said lubricant comprising a saturated C.sub.2 -C.sub.4 ether of ethylene oxide and 1,2-propylene oxide copolymers, the ratio of ethylene oxide to propylene oxide being about 1:1 to 3:1;
- said lubricant having a pour point below about 15.degree. F., a viscosity at 100.degree. F. of about 100 to 400 SUS, and a molecular weight of about 200 to 800;
- said lubricant wetting the outer layer, and being soluble in monochlorodifluoromethane and dichlorodifluoromethane.
Dependencies are inferred from the claim text.