Composition comprising an oxygenated solvent and a siloxane solvent for the removal of silicone deposits
AssigneeNuGeneration Technologies, LLC
InventorsDonato Polignone, Stephen Utschig-Samuels
Life of this patent
Estimating the term…
Abstract
A solvent composition has an oxygenated solvent and a siloxane solvent. In one embodiment, the oxygenated solvent is propylene glycol methyl ether and the siloxane solvent is hexamethyldisiloxane or octamethyltrisiloxane. In another embodiment, the solvent composition is an azeotrope of propylene glycol n-butyl ether and decamethyltetrasiloxane. The siloxane solvent can be used in any situation where one desires to remove a silicone deposit, e.g., conformal coatings, adhesives, sealants, greases, heat transfer fluids, paints, oils, etc.
Claims15
A method of removing a silicone deposit, comprising:
- providing a solvent composition including an oxygenated solvent and a siloxane solvent, wherein the oxygenated solvent includes propylene glycol n-butyl ether and the siloxane solvent includes decamethyltetrasiloxane, wherein the solvent composition includes approximately 15% of the siloxane solvent by weight and approximately 85% of the oxygenated solvent by weight to form an azeotrope, and wherein the solvent composition includes no other solvents other than the oxygenated solvent and the siloxane solvent;
- providing an object including a silicone deposit disposed on the object;
- and
- removing the silicone deposit by using the solvent composition to dissolve the silicone deposit.
A method of removing a silicone coating, comprising:
- a) providing a printed circuit board (PCB) including a first electrical component mounted to the PCB and a silicone coating deposited over the PCB and first electrical component;
- b) providing a solvent composition including an oxygenated solvent and a siloxane solvent, wherein:
- i) the oxygenated solvent includes propylene glycol n-butyl ether and the siloxane solvent includes decamethyltetrasiloxane;
- ii) the solvent composition is a non-azeotrope with at least 50% by weight of the siloxane solvent, and
- iii) the oxygenated solvent and siloxane solvent in combination comprise approximately 100% by weight of the solvent composition;
- c) using the solvent composition to remove a portion of the silicone coating over the first electrical component by disposing the solvent composition in an aerosol can and dispensing the solvent composition through an aerosol nozzle;
- and
- d) replacing the first electrical component with a second electrical component after removing the portion of the silicone coating.
A method of removing a silicone coating, comprising:
- a) providing a printed circuit board (PCB) including a first electrical component mounted to the PCB and a first silicone coating deposited over the PCB and first electrical component;
- b) providing a solvent composition including an oxygenated solvent and a siloxane solvent, wherein:
- i) the oxygenated solvent includes propylene glycol n-butyl ether and the siloxane solvent includes decamethyltetrasiloxane;
- and
- ii) the oxygenated solvent and siloxane solvent in combination comprise approximately 100% by weight of the solvent composition;
- c) using the solvent composition to remove a first portion of the first silicone coating over the first electrical component while a second portion of the first silicone coating remains on the PCB;
- d) replacing the first electrical component with a second electrical component after removing the portion of the first silicone coating;
- and
- e) forming a second silicone coating over the second electrical component and PCB to replace the first silicone coating after replacing the first electrical component.
Dependencies are inferred from the claim text.