Thermal barrier composition

a technology of thermal barrier and composition, which is applied in the direction of ceramic layered products, transportation and packaging, coatings, etc., can solve the problems of piping used in various manufacturing facilities to be subjected to temperatures in excess of 400.degree.

Inactive Publication Date: 2004-12-23
MICROPHASE COATINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Substrates, particularly metal substrates, can be subjected to high temperatures causing fatigue, cracking, distortion and the like of the substrate.
In such a situation, it is readily apparent that fatiguing or cracking can lead to catastrophic failure.
Similarly, piping used in various manufacturing facilities can be subjected to temperatures in excess of 400.degree. F. caused by the liquid or gas passing through the pipe.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] 1. Formulation

1 wt % Component 6.79 Poly(methylsilsesquioxane) 10.50 Titanium isopropoxide 4.19 Polydiethoxysiloxane 21.00 Silanol-terminated polydimethylsiloxane (4200 g / mol) 7.35 Titanium diisopropoxide (Bis-2,4-pentanedionate) 4.19 Polydiethoxysiloxane 31.49 Mica 325 mesh 13.48 Heucophos ZPO (zinc organophosphate) Corrosion Protection 1.50 Heucorin RZ (zinc salt) Corrosion Protection

[0013] 2. Manufacturing Steps

[0014] The first step is to dissolve the polymethysilsesquioxane (POSS) into the titanium isopropoxide (TIPO). This is accomplished by mixing the POSS into the titanium isopropoxide and heating at 100.degree. C. for 24 hours.

[0015] The second step is to terminate the silanol groups on the ends of the polydimethylsiloxane. This is accomplished by mixing the silanol terminated polydimethylsiloxane with the titanium diisopropoxide (bis-2,4-pentanedionate) and allowing the mixture to crosslink for 1 hour. If this step is not performed, the silanol groups on the polymer ...

example 2

[0017] Formulation

2 wt % Component 24.07 Polysilsesquioxane dissolved in titanium isopropoxide and 20% polydiethoxysiloxane 5.42 Epoxy-functionalized polydimethylsiloxane 0.61 Aminopropyltriethoxy silane 16.05 Milled glass fiber 10.57 Hollow glass microspheres 1.20 Dibutyl tin dilaurate 40.12 Isopropyl alcohol 1.78 Titanium dioxide 0.18 Carbon Black

[0018] The formulation was manufactured using the same steps as Example 1 except that the POSS did not have to be pre-reacted with the TIPO. The formulation of Example 2 was used in various tests as described below and in Table 1.

3TABLE 1 Property Approach Test Method Standard Results Flexure Mechanically flex a coated titanium Apply coating to 6-inch titanium ASTM- 6 of 10 strips experienced cracking strip until the coating cracks or strips. Bend strips over rods of D6272 when bent over 1.50" rods. Only 4 delaminates increasing diameter until cracks modified of 10 strips experienced cracking appear. when bent over 1.25" rods. Conclusion:...

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Abstract

The thermal barrier composition of the present invention provides a glassy matrix comprising an alkoxy-functionalized siloxane and a functionally-terminated silane or siloxane, polymethylsilsesquioxane dissolved in a crosslinking agent, and optionally a filler and/or hollow glass microspheres.

Description

[0001] This application claims priority to Provisional Application No. 60 / 461,800 filed Apr. 10, 2003, the disclosure of which is hereby incorporated by reference in its entirety.FIELD AND BACKGROUND OF THE INVENTION[0002] The present invention relates to a thermal barrier composition for use on a variety of substrates that are exposed to high temperatures. Exemplary substrates include pipelines, engine parts including jet engine components, water conduits including tubes in power plants, reactor vessels and exhaust manifolds.[0003] Substrates, particularly metal substrates, can be subjected to high temperatures causing fatigue, cracking, distortion and the like of the substrate. For example, components of a jet engine or the surrounding parts of the jet can be exposed to temperatures in excess of 1800.degree. F. In such a situation, it is readily apparent that fatiguing or cracking can lead to catastrophic failure. Similarly, piping used in various manufacturing facilities can be s...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B32B5/16B32B9/04B32B18/00C08G77/08C08G77/18C08K3/20C08K3/36C08L83/00C08L83/04C09D5/18C09D183/04C23CE04B1/74
CPCC08G77/14C08G77/18C08L83/04C09D5/18C09D183/04C08L83/00Y10T428/31663
Inventor SIMENDINGER, WILLIAM H. IIIGARRETT, DAVID WILLIAM
Owner MICROPHASE COATINGS
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