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US 9,429,149 B2Granted
Polyetherimide pump
AssigneeSabic Global Technologies B.V.
InventorPeter Haug
Life of this patent
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Abstract
A positive displacement pump and methods of making a positive displacement pump having a component, the component having a density ranging from more than 0 to 3 g/cm3, a glass transition temperature (Tg) greater than or equal to 150° C., and a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.
Claims28
A positive displacement pump comprising at least a first component;
- wherein said first component comprises a polyetherimide component,
- wherein the polymeric component has a density ranging from more than 0 to 3 g/cm3,
- wherein the polymeric component has a glass transition temperature (Tg) greater than or equal to 150° C.,
- wherein the polymeric component has a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.;
- and,
- wherein the first component is a rotor of the positive displacement pump.
3 more elements
A method of making a positive displacement pump for pumping liquids, the pump comprising
- a housing defining an inlet and an outlet,
- a rotor operatively positioned between the inlet and the outlet, the pump further comprising a rotor for displacing a liquid between the inlet and the outlet,
- wherein the method comprises forming at least the rotor of the pump from polyetherimide, wherein the polyetherimide has a density ranging from more than 0 to 3g/cm3, and has glass transition temperature (Tg) greater than or equal to 150° C., and has a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.
A positive displacement pump comprising a polyetherimide component,
- wherein the polyetherimide component has a density ranging from more than 0 to 3 g/cm3,
- wherein the polyetherimide component has a glass transition temperature (Tg) greater than or equal to 150° C., and
- wherein the polyetherimide component has a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C;
- wherein the polyetherimide component comprises a member selected from the group of polyetherimide homopolymers, polyetherimide copolymers, and combinations thereof;
- wherein the polyetherimide component is a rotor operatively positioned between an inlet and an outlet, wherein the inlet and the outlet are defined by a housing, and wherein the pump further comprises a displacement component for displacing a liquid between the inlet and the outlet, wherein the displacing component is one selected from the group consisting of a vane, a gear, and a trachoid.
2 more elements
A positive displacement pump comprising at least a first component;
- wherein said first component comprises a polyetherimide component,
- wherein the polymeric component has a density ranging from more than 0 to 3 g/cm3, a glass transition temperature (Tg) greater than or equal to 150° C., a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.;
- has an Izod unnotched (80*10*4 at +23° C. and−30° C.) impact strength of at least 40 KJ/m2, as measured according to ISO 180/1U, a Vicat softening temp, rate B/120 of 220° C., as measured according to ISO 306, an HDT/Ae, 1,8 MPa Edgew 120*10*4 sp=100 mm of 210° C., as measured according to ISO 75/Ae, and,
- wherein the first component is a rotor of the positive displacement pump.
1 more element
Dependencies are inferred from the claim text.