# US 5,352,509 A · Insulating product of mineral fibre wool, intended in particular for heat insulation of pipes and method for preparing this product

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- Number: US 5,352,509 A
- Document ID: US5352509A
- Status: Granted
- Kind: A
- Application number: 08/179,762
- Filed: 1994-01-10
- Granted: 1994-10-04
- Earliest claimed: 1989-04-06
- Assignees: Oy Partek AB
- Inventors: Bob L. O. Talling
- Web page: https://patentgrep.com/patent/US5352509A

## CPC

- D04H 1/64: the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
- Y10T 442/60: Nonwoven fabric [i.e., nonwoven strand or fiber material]
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to a heat insulation product of mineral fiber wool. The curable binding agent of the product is an aqueous suspension containing water glass and slag. The slag reacts hydraulically with the alkalis or the water glass yielding water resistant bonds. During the preparation of the product, the suspension of water glass and slag is agitated before being applied onto the product. The curing of tile binding agent can be carried out immediately or at a later time. Curing may be effected at room temperature or at an elevated temperature.

## Claims

### Claim 1

Insulating product of mineral fibres intended in particular for the heat insulation of pipes whereas its binder consists essentially of water glass and slag, the water glass having a molar ration R.sub.s of 2.3 to 3.0, in which product the weight ratio of the mineral fibre amount to the dry substance of the water glass is 100:1-100:20, the slag is present in the binder in such an amount that the weight ratio of the dry substance of the water glass to the slag is 100:1-100:50, and the slag is pulverized blast furnace slag.

### Claim 2 (depends on 1)

Insulating product according to claim 1, whereas the binder is present in the product in such an amount, that the weight ratio of the mineral fibre amount to he dry substance of water glass is 100:5-100:14.

### Claim 3 (depends on 1, 2)

Insulating product according to claims 1 or 2, whereas the slag is presenting the binder in such an amount that the weight ratio of the dry substance of the water glass to the slag is 10:1-10:2.

### Claim 4 (depends on 1, 2)

Insulating product according to claims 1 or 2, whereas the binder contains dust binding, hydrophobizing or additional curing agents for the mineral fibres.

### Claim 5 (depends on 1, 2)

Insulating product according to claims 1 or 2, whereas it is uncured and packed in a moisture- and gasproof package.

### Claim 6 (depends on 1, 2)

Insulating product according to claim 1 or 2, whereas the binder consists essentially of water glass and slag, the water glass having a molar ratio R.sub.s of 2.7-3.0.

### Claim 7 (depends on 1, 2)

Insulating product according to claims 1 or 2, whereas the binder contains dust binding, hydrophobizing and additional curing agents for the mineral fibres.

### Claim 8 (depends on 7)

Insulating product according to claim 7, whereas the binding agent is polybutene and the hydrophobizing agent is silane.