# US 5,707,633 A · Thermal protection material covering of aggregate of mineral fibers and method for producing same

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- Number: US 5,707,633 A
- Document ID: US5707633A
- Status: Granted
- Kind: A
- Application number: 08/665,773
- Filed: 1996-06-18
- Granted: 1998-01-13
- Earliest claimed: 1992-11-05
- Assignees: Societe Anonyme dite: Aerospatiale Societe Nationale Industrielle
- Inventors: Jean-Louis Tisne
- Web page: https://patentgrep.com/patent/US5707633A

## CPC

- F16L 59/028: {Compositions for or methods of fixing a thermally insulating material}
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL

## Abstract

Thermal protection material coating of an aggregate of mineral fibers, in particular carbon or silicon, is provided with at least one coat of a silicon-based material covering at least the area exposable to the flaking or crumbling sources of the thermal protection device. The coating is especially applicable to thermal protection structures.

## Claims

### Claim 1

A coating, comprising:
a thermic protection material comprising an aggregate containing mineral fibers, said aggregate including a surface which is capable of crumbling under action of gaseous flow thereover; and
at least one layer of a silicone-based material covering at least said surface, said silicone-based material comprising at least one member selected from the group consisting of certified space products.

### Claim 2 (depends on 1)

The coating according to claim 1, wherein said mineral fibers are members selected from the group consisting of carbon and silica.

### Claim 3 (depends on 1)

The coating according to claim 1, wherein silicone-based material comprises a silicone resin.

### Claim 4 (depends on 2)

The coating according to claim 2, wherein said silicone-based material comprises a silicone resin.

### Claim 5 (depends on 1)

The coating according to claim 1, wherein said at least one layer has a total thickness of between about 50 and 100 micrometers.

### Claim 6 (depends on 1)

The coating according to claim 1, wherein said thermic protection material comprises an aggregate of short silica fibers linked together by a binder comprising silica and a phenolic resin.

### Claim 7

A coating, comprising:
a thermic protection material comprising an aggregate containing mineral fibers, said aggregate including a surface which is capable of crumbling under action of gaseous flow thereover; and
at least one layer of a silicone-based material covering at least said surface, said silicone-based material is not selected from the group consisting of certified space products, and is subjected, after projection and polymerization on said surface, to a baking post-treatment such that after the baking post-treatment, the silicone-based material fulfills the requirements of degassing standard ESA PSS 01-702A.

### Claim 8 (depends on 7)

The coating according to claim 7, wherein said silicone-based material is polymerized, dried and then baked, with the baking being effected under a medium vacuum at temperature of about 120.degree. C. for a period of about 24 hours.

### Claim 9 (depends on 7)

The coating according to claim 7, wherein said at least one layer has a total thickness of between about 50 and 100 micrometers.

### Claim 10 (depends on 7)

The coating according to claim 7, wherein said thermic protection material comprises an aggregate of short silica fibers linked together by a binder comprising silica and a phenolic resin.

### Claim 11 (depends on 7)

The coating according to claim 7, wherein said mineral fibers are members selected from the group consisting of carbon and silica.