HVAC/R system sealant and drying composition, and method for sealing and removing moisture therewith

Patent metadata

Field	Value
Publication number	US-10012422-B1
Application number	US-201615194731-A
Country	US
Kind code	B1
Filing date	Jun 28, 2016
Priority date	Jun 28, 2016
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A moisture treatment and leak sealant product for a vapor-compression system has two separate components. One of the components includes a viscosity modifying additive, excluding oil compounds, to more closely match a viscosity of the product to that of lubricating oil in the system and a drying agent to remove moisture from the system. The second of the components includes a silane leak sealant and also the viscosity modifying additive.

First claim

We claim:

1. A moisture treatment and leak sealant product for a vapor-compression system, comprising first and second separate components, a first of the components including a viscosity modifying additive excluding oil compounds to more closely match a viscosity of the product to that of lubricating oil in the system and a drying agent to remove moisture from the system, and a second of the components including a silane leak sealant and the viscosity modifying additive, wherein the viscosity modifying agent is a compound selected from the group consisting of ethers, esters, ketones, aldehydes, amines, anhydrides and amides, and exclude compound families with OH groups.

2. The product of claim 1 wherein the drying agent is 2,2-dimethoxypropane.

3. The product of claim 1 wherein the viscosity modifying agent is a compound selected from the group consisting of tetraglyme, triethylene glycol dimethyl ether, diethylene glycol diethyl ether, butyric anhydride, tetramethylurea, ethylene glycol diacetate, N,N-dimethylformamide, N,N dimethylacetamide, N,N-diethylformamide, or 2-octanone.

4. The product of claim 1 , wherein the system is one of a refrigerator, a heat pump, a freezer, an air conditioner, a thermal control device, a refrigerant recovery apparatus, a refrigerant recycling apparatus and a refrigerant reclamation apparatus.

5. The product of claim 1 , wherein the drying agent is present in a concentration of between about 1 and 99 percent by mass.

6. The product of claim 1 , wherein the viscosity modifying additive is present in a concentration of between about 1 and 99 percent by mass.

7. The product of claim 1 , wherein the silane leak sealant is present in a concentration of between about 1 and 99 percent by mass.

8. A moisture treatment and leak sealant product for a vapor-compression system, comprising first and second separate components, a first of the components including a viscosity modifying additive excluding oil compounds to more closely match a viscosity of the product to that of lubricating oil in the system and a drying agent to remove moisture from the system, and a second of the components including a silane leak sealant and the viscosity modifying additive, wherein the silane leak sealant is trimethoxyvinylsilane in a concentration of between about 1 and 100 percent by mass, N-3-trimethoxysilylpropylethylenediamine in a concentration of between about 1 and 100 percent by mass and trimethoxymethylsilane in a concentration of between about 1 and 10 percent by mass.

9. The product of claim 1 , wherein the viscosity modifying additive is present in a concentration of between about 1 and 99 percent by mass.

10. The product of claim 8 , wherein the viscosity modifying additive is a high viscosity liquid.

11. A method of removing moisture and sealing leaks in a vapor compression system, comprising first introducing a drying agent and a viscosity modifying agent excluding oil compounds, and then introducing a silane leak sealant and an additional amount of the viscosity modifying agent, wherein the viscosity modifying additive is a compound selected from the group consisting of ethers, esters, ketones, aldehydes, amines, anhydrides and amides, and exclude compound families with OH groups.

12. The method according to claim 11 , wherein the drying agent is 2,2-dimethoxypropane.

13. The method according to claim 11 , wherein the viscosity modifying additive is a compound selected from the group consisting of tetraglyme, triethylene glycol dimethyl ether, diethylene glycol diethyl ether, butyric anhydride, tetramethylurea, ethylene glycol diacetate, N,N-dimethylformamide, N,N dimethylacetamide, N,N-diethylformamide, or 2-octanone.

14. The method according to claim 11 , wherein the system is one of a refrigerator, a heat pump, a freezer, an air conditioner, a thermal control device, a refrigerant recovery apparatus, a refrigerant recycling apparatus and a refrigerant reclamation apparatus.

15. The method according to claim 11 , wherein the drying agent is present in a concentration of between about 1 and 99 percent by mass.

16. The method according to claim 11 , wherein the viscosity modifying agent is present in a concentration of between about 1 and 99 percent by mass.

17. The method according to claim 11 , wherein the silane leak sealant is present in a concentration of between about 1 and 99 percent by mass.

18. The method according to claim 11 , wherein the silane leak sealant is compound selected from the group consisting of trimethoxyvinylsilane in a concentration of between about 1 and 100 percent by mass, N-3-trimethoxysilylpropylethylenediamine in a concentration of between about 1 and 100 percent by mass and trimethoxymethylsilane in a concentration of between about 1 and 10 percent by mass.

19. The method according to claim 18 , wherein the viscosity modifying agent is a high viscosity liquid.

20. The method according to claim 11 , wherein the viscosity modifying additive is present in a concentration of between about 1 and 99 percent by mass.

21. The method according to claim 11 , wherein the introduction is into a compressor oil sump of the system.

22. The method according to claim 11 , wherein the introduction occurs at a low-pressure side of the system during operation by using a pressure differential between high and low pressure sides of the system.

23. The method according to claim 22 , wherein a low-pressure service port comprises a connection to the low pressure side, and a high-pressure service port comprises a connection to the high pressure side.

Assignees

• Amundsen Ted J
• Scaringe Robert P
• Mainstream Eng Corporation

Inventors

• Amundsen Ted J
• Scaringe Robert P

Classifications

• C09K3/12 Primary

  Materials for stopping leaks, e.g. in radiators, in tanks (filling pastes C09D5/34) · CPC title

• F25B31/002

  Lubrication · CPC title

• F25B2500/14

  the presence of moisture in a refrigeration component or cycle · CPC title

• F25B2500/22

  Preventing, detecting or repairing leaks of refrigeration fluids · CPC title

• F25B13/00

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title