# US 5,703,147 A · Extrudable microporous insulation

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- Number: US 5,703,147 A
- Document ID: US5703147A
- Status: Granted
- Kind: A
- Application number: 08/510,350
- Filed: 1995-08-02
- Granted: 1997-12-30
- Earliest claimed: 1995-08-02
- Assignees: Schuller International, Inc.
- Inventors: Phillip Charles Martin; Monroe W. Shumate; William Michael Gregg
- Web page: https://patentgrep.com/patent/US5703147A

## CPC

- C04B 30/02: containing fibrous materials
- C04B 28/24: containing alkyl, ammonium or metal silicates; containing silica sols {(reaction mixtures resulting in mineral polymers C04B28/006; polymeric reaction products of alkali metal silicates with isocyanates C08G18/3895)}
- C04B 2111/00724: {in mining operations, e.g. for backfilling; in making tunnels or galleries}
- C04B 2111/00982: {as construction elements for space vehicles or aeroplanes}
- Y10T 428/249953: Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T 428/249978: Voids specified as micro
- Y10T 428/249982: With component specified as adhesive or bonding agent
- Y10T 428/31855: Of addition polymer from unsaturated monomers
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A low density, high temperature resistant insulation material that is very thermally efficient, is easily moldable and is unaffected by water. The insulation material is especially suitable for use in aviation, aerospace and automotive applications. The insulation material contains inorganic fiber; inorganic binder; hydrophilic particulate inorganic material; hydrophobic particulate inorganic material; polymer; and preferably a setting agent and an opacifier.

## Claims

### Claim 1

An extrudable microporous insulation material comprising about:
(a) 10-30 wt % inorganic reinforcement fiber;
(b) 15-35 wt % inorganic binder;
(c) 10-20 wt % hydrophilic fumed particulate filler and bulking material;
(d) 25-50 wt % fumed particulate insulation material which has been surface treated to make the material hydrophobic;
(e) 0.5-5 wt % polymer;
(f) 0-6 wt % setting agent; and
(g) 0-20 wt % opacifier.

### Claim 2 (depends on 1)

An extrudable microporous insulation material according to claim 1 wherein: said hydrophilic fumed particulate material has a surface area greater than about 100 m.sup.2 /g and said hydrophobic fumed particulate material has a surface area greater than about 50 m.sup.2 /g.

### Claim 3 (depends on 1)

An extrudable microporous insulation material according to claim 1 wherein: said inorganic binder is an acid stabilized colloidal silica and said setting agent is a base stabilized colloidal silica.

### Claim 4 (depends on 1)

An extrudable microporous insulation material according to claim 1 wherein: said polymer is at least one polymer selected from the group consisting of polyalkylene oxides; cellulose ethers; polyalkylene glycols; and copolymers of vinyl amides and acrylic acids.

### Claim 5 (depends on 1)

An extrudable microporous insulation material according to claim 1, wherein: said polymer is a polyalkylene glycol.

### Claim 6 (depends on 5)

An extrudable microporous insulation material according to claim 5 wherein: said polyalkylene glycol is polyethylene glycol.

### Claim 7 (depends on 1)

An extrudable microporous insulation material according to claim 1 wherein said polymer is a copolymer of vinyl amides and acrylic acids.

### Claim 8 (depends on 1)

An extrudable microporous insulation material according to claim 1 wherein: said polymer is an acrylamide-acrylate copolymer.

### Claim 9 (depends on 1)

An extrudable microporous insulation material according to claim 1 having a density ranging from about 8 to about 20 p.c.f.

### Claim 10 (depends on 1)

An extrudable microporous insulation material according to claim 1 having a density ranging from about 10 to about 16 p.c.f.

### Claim 11 (depends on 1)

An extrudable microporous insulation material according to claim 1, wherein: said hydrophilic fumed particulate material is fumed silica; and said hydrophobic fumed particulate material is fumed silica surface treated with dimethyl silicone fluid, dimethyl-dichorosilane, or hexamethyl-disilane to make the material hydrophobic.

### Claim 12 (depends on 1)

An extrudable microporous insulation material according to claim 1 comprising about:
(a) 15-25 wt % inorganic fiber;
(b) 18-22 wt % inorganic binder;
(c) 13-18 wt % hydrophilic fumed particulate inorganic material;
(d) 30-40 wt % hydrophobic fumed particulate inorganic material;
(e) 1-4 wt % polymer;
(f) 0.5-4 wt % setting agent; and
(g) 7-15 wt % opacifier.

### Claim 13 (depends on 12)

An extrudable microporous insulation material according to claim 12 wherein: said hydrophilic fumed particulate inorganic material has a surface area greater than about 100 m.sup.2 /g and said hydrophobic fumed particulate inorganic material has a surface area greater than about 50 m.sup.2 /g.

### Claim 14 (depends on 13)

An extrudable microporous insulation material according to claim 13, wherein: said hydrophilic fumed particulate material is fumed silica; and said hydrophobic fumed particulate inorganic material is fumed silica surface treated with dimethyl silicone fluid, dimethyl-dichorosilane, or hexamethyl-disilane to make the material hydrophobic.

### Claim 15 (depends on 12)

An extrudable microporous insulation material according to claim 12 wherein: said inorganic binder is an acid stabilized colloidal silica and said setting agent is a base stabilized colloidal silica.

### Claim 16 (depends on 12)

An extrudable microporous insulation material according to claim 12 wherein: said polymer is at least one polymer selected from the group consisting of polyalkylene oxides; cellulose ethers; polyalkylene glycols; and copolymers of vinyl amides and acrylic acids.

### Claim 17

An extrudable microporous insulation material comprising about:
(a) 18 wt % inorganic reinforcement fiber;
(b) 19 wt % inorganic binder;
(c) 15 wt % hydrophilic particulate inorganic filler and bulking material;
(d) 33 wt % particulate inorganic insulation material which has been surface treated to make the material hydrophobic;
(e) 4 wt % polymer;
(f) 1 wt % setting agent; and
(g) 10 wt % opacifier.

### Claim 18 (depends on 17)

An extrudable microporous insulation material according to claim 17 wherein: said hydrophilic fumed particulate material has a surface area greater than about 100 m.sup.2 /g and said hydrophobic fumed particulate material has a surface area greater than about 50 m.sup.2 /g.

### Claim 19 (depends on 17)

An extrudable microporous insulation material according to claim 17 wherein: said inorganic binder is an acid stabilized colloidal silica and said setting agent is a base stabilized colloidal silica.

### Claim 20 (depends on 17)

An extrudable microporous insulation material according to claim 17 wherein: said polymer is at least one polymer selected from the group consisting of polyalkylene oxides; cellulose ethers; polyalkylene glycols; and copolymers of vinyl amides and acrylic acids.