# US 2014/0150242 A1 · Method for producing hydrophobic, heat-insulating mouldings

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- Number: US 2014/0150242 A1
- Document ID: US20140150242A1
- Status: Published application
- Kind: A1
- Application number: 14/233,085
- Filed: 2011-07-27
- Published: 2014-06-05
- Earliest claimed: 2011-07-27
- Assignees: Evonik Degussa GmbH
- Inventors: Guenter Kratel; Gerd Borchert; Frank Menzel
- Web page: https://patentgrep.com/patent/US20140150242A1

## CPC

- C07F 7/025: {without C-silicon linkages}
- C04B 30/02: containing fibrous materials
- C04B 41/009: {characterised by the material treated}
- C04B 41/4933: {containing halogens, i.e. organohalogen silanes}
- C04B 41/4944: {containing atoms other than carbon, hydrogen, oxygen, silicon, alkali metals or halogens, e.g. N-silyldisilazane: Image}
- C04B 41/64: Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
- C09C 1/3081: {Treatment with organo-silicon compounds}
- C04B 2111/28: Fire resistance, i.e. materials resistant to accidental fires or high temperatures
- Y02W 30/91: Use of waste materials as fillers for mortars or concrete
- Y10T 29/4998: Combined manufacture including applying or shaping of fluent material
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Process for hydrophobizing a microporous thermal insulation molding comprising hydrophilic silica, in which the molding is treated with at least one organosilane and in which one or more organosilanes which are gaseous under the reaction conditions are introduced into a chamber containing the microporous thermal insulation molding comprising hydrophilic silica until the pressure difference Δp is ≧20 mbar.

## Claims

### Claim 1

A process for hydrophobizing a molding, the method comprising:
treating the molding with at least one organosilane in a chamber, thereby obtaining a hydrophobized molding,
wherein:
the molding is a microporous thermal insulation molding comprising hydrophilic silica, and
the at least one organosilane is gaseous under said treating and is introduced into the chamber until a pressure difference Δp is ≧20 mbar.

### Claim 2 (depends on 1)

The process of claim 1,
wherein a pressure in the chamber before introducing the at least one organosilane is less than atmospheric pressure.

### Claim 3 (depends on 1)

The process of claim 1,
wherein a pressure in the chamber before introducing the at least one organosilane is atmospheric pressure or above.

### Claim 4 (depends on 1)

The process of claim 1,
wherein the molding comprises at least one of a pyrogenic silica and a silicon dioxide aerogel as the hydrophilic silica.

### Claim 5 (depends on 1)

The process of claim 1,
wherein the at least one organosilane is selected from the group consisting of Rn—Si—X4-n , R3Si—Y—SiR3,RnSinOn, (CH3)3—Si—(O—Si(CH3)2)n—OH, and HO—Si(CH3)2—(O—Si(CH3)2)n—OH,
where
n is a number of from 1 to 8;
R is —H, —CH3, or —C2H5;
X is —Cl, —Br; —OCH3, —OC2H5, or —OC3H8; and
Y is NH, or O.

### Claim 6 (depends on 1)

The process of claim 1,
wherein the at least one organosilane is introduced in liquid or vapor form into the chamber.

### Claim 7 (depends on 1)

The process of claim 1,
wherein at least one of water, an alcohol, and a hydrogen halide is introduced simultaneously with or subsequently to the at least one organosilane.

### Claim 8 (depends on 1)

The process of claim 1,
wherein the molding further comprises at least one of an opacifier, a fiber, and a finely divided inorganic additive.

### Claim 9 (depends on 8)

The process of claim 8,
wherein the molding comprises:
45-95% by weight of at least one of pyrogenic silicon dioxide and silicon dioxide aerogel,
5-20% by weight of the opacifier,
5-35% by weight of the finely divided inorganic additive, and
0-12% by weight of the fiber.

### Claim 10 (depends on 1)

The process of claim 1,
wherein the molding is perforated.

### Claim 11 (depends on 1)

The process of claim 1,
wherein said treating occurs at a temperature in the of from 20 to 300° C.

### Claim 12 (depends on 1)

The process of claim 1,
wherein the molding is left in the chamber for from 1 minute to 1 hour before introducing the at least one organosilane.

### Claim 13 (depends on 1)

A method for producing insulation, the method comprising:
employing the hydrophobized molding produced by the process of claim 1 in the insulation,
wherein the insulation is insulation in hollow building blocks, core insulation in multilayer building blocks, core insulation for composite thermal insulation systems for interior and exterior insulation of buildings, insulation in cavity wall masonry, or insulation in furnace construction and vacuum insulation panels.