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.

IPC Classes  ?

• C11D 9/36 - Organic compounds containing silicon
• B08B 3/08 - Cleaning involving contact with liquid the liquid having chemical or dissolving effect
• C09D 9/00 - Chemical paint or ink removers
• C11D 7/50 - Solvents
• C11D 17/00 - Detergent materials or soaps characterised by their shape or physical properties

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.

IPC Classes  ?

• C11D 9/36 - Organic compounds containing silicon
• C11D 7/50 - Solvents
• B08B 3/08 - Cleaning involving contact with liquid the liquid having chemical or dissolving effect
• C11D 17/00 - Detergent materials or soaps characterised by their shape or physical properties
• C09D 9/00 - Chemical paint or ink removers
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents

Abstract

A face mask has a first woven filter layer comprising a first yarn and a second woven filter layer comprising a second yarn. The second yarn is disposed at a non-right and non-parallel angle relative to the first yarn. The second woven filter layer is stitched to the first woven filter layer. A third woven filter layer with a third yarn can be added with the third yarn at a non-right and non-parallel angle relative to both the first yarn and second yarn.

IPC Classes  ?

• A62B 18/02 - Masks
• A41D 13/11 - Protective face masks, e.g. for surgical use, or for use in foul atmospheres
• A62B 27/00 - Methods or devices for testing respiratory or breathing apparatus
• B01D 39/08 - Filter cloth, i.e. woven, knitted or interlaced material

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.

IPC Classes  ?

• C11D 9/36 - Organic compounds containing silicon
• C11D 7/50 - Solvents
• B08B 3/08 - Cleaning involving contact with liquid the liquid having chemical or dissolving effect
• C11D 17/00 - Detergent materials or soaps characterised by their shape or physical properties
• C09D 9/00 - Chemical paint or ink removers
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents

Abstract

A converter-dissolver composition in an aqueous solution of carbonate or bicarbonate, chelating agents, hydroxide base, and surfactant wetting agent. A mixture of the chelating agents and carbonate or bicarbonate is diluted with deionized water. The mixture reacts for five minutes. The hydroxide base is added to the mixture to form an in-situ reaction with the carbonate or bicarbonate and reacted for another five minutes. The solution pH is adjusted with the chelating agent. The surfactant wetting agent is added. The aqueous solution is heated to 70-230° C. and applied to a surface of oil or gas well and pipeline equipment with metal sulfate scales in a ratio of 3.78 liters of the aqueous solution per 0.45 kilograms of the metal sulfate scales. The aqueous solution reacts for 0.25-1.5 hours to dissolve the metal sulfate scales. The aqueous solution and dissolved metal sulfate scales are flushed from the surface.

IPC Classes  ?

• C09K 8/528 - Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
• C11D 3/36 - Organic compounds containing phosphorus
• C11D 1/14 - Sulfonic acids or sulfuric acid estersSalts thereof derived from aliphatic hydrocarbons or mono-alcohols
• C11D 3/04 - Water-soluble compounds
• C11D 3/10 - Carbonates
• C11D 3/30 - AminesSubstituted amines
• C11D 3/33 - Amino carboxylic acids
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents

Abstract

A converter-dissolver composition in an aqueous solution of carbonate or bicarbonate, chelating agents, hydroxide base, and surfactant wetting agent. A mixture of the chelating agents and carbonate or bicarbonate is diluted with deionized water. The mixture reacts for five minutes. The hydroxide base is added to the mixture to form an in-situ reaction with the carbonate or bicarbonate and reacted for another five minutes. The solution pH is adjusted with the chelating agent. The surfactant wetting agent is added. The aqueous solution is heated to 70-230 °C and applied to a surface of oil or gas well and pipeline equipment with metal sulfate scales in a ratio of 3.78 liters of the aqueous solution per 0.45 kilograms of the metal sulfate scales. The aqueous solution reacts for 0.25-1.5 hours to dissolve the metal sulfate scales. The aqueous solution and dissolved metal sulfate scales are flushed from the surface.

IPC Classes  ?

• C02F 5/14 - Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
• C09K 8/528 - Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
• C23G 1/14 - Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions