Information
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Patent Application
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20030181564
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Publication Number
20030181564
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Date Filed
March 18, 200321 years ago
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Date Published
September 25, 200320 years ago
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CPC
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US Classifications
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International Classifications
- C08J003/00
- C08L001/00
- C08K003/08
Abstract
A fire-protection composition has browsing-resistant metal fibers.
Description
FIELD OF INVENTION
[0001] The invention relates to a fire-protection composition, such as a sealing composition, which is difficult to ignite or is capable of intumescing.
BACKGROUND INFORMATION AND THE PRIOR ART
[0002] Fire-protection compositions with intumescing materials, which expand when overheated, are customarily used as fire-protection products in kneadable or dimensionally stable form or as composite structures especially in dry-wall constructions, for example, to close off openings in partitions, wall feed-throughs and back-ventilated facades fire-tight and smoke-tight in the event of a fire.
[0003] Long-term stability is a particularly important criterion for fire-protection products. A problem arises in this regard if small animals, such as rats and mice, which destroy, for example, fire-protection products reinforced with fiberglass, by simply biting through the glass fibers; browse on the fire-protection products.
[0004] According to the DE10024421, an intumescing fire-protection composition consists essentially of a polymer matrix, expandable graphic, fillers and additives. According to U.S. Pat. No. 6,153,674, the structural phase is reinforced by adding a fiber mixture of tough organic fibers and high-strength inorganic fibers in an amount of 0.01% to 15% of the total weight, the inorganic fibers, including metal fibers having a length of 1 mm to 25 mm and a diameter of 0.05 μm to 5 μm. Such fiber mixtures are not resistant to browsing.
[0005] Moreover, the EP492248 discloses a fire protection product, which is constructed as a fabric and has grainy intumescing materials, such as expandable graphite, which is disposed in sandwich fashion between two textile fabrics of any fiber materials, which are sewn together or needle-punched. For reinforcement, glass, mineral or metal fibers 5 mm to 20 mm in length, as components of a fiber mixture, are mixed with these textile fabrics.
[0006] Moreover, according to WO0188301, it is known that concrete may be reinforced with steel wire fibers, 10 mm to 70 mm in length.
OBJECT OF THE INVENTION
[0007] It is an object of the invention to realize a fire-protection composition with a high long-term stability.
SUMMARY OF THE INVENTION
[0008] This objective is accomplished essentially by the distinguishing features of the independent claims. Advantageous further developments arise out of the dependent claims.
[0009] Essentially, a fire-protection composition contains a proportion of browsing-resistant metal fibers.
[0010] By means of the browsing-resistant barriers, which small animals cannot bite through or break and which are not decomposed biologically over time, as are organic fibers, a permanent protection of the fire-protection product against browsing by small animals is provided, as a result of which the long-term stability is increased.
[0011] Advantageously, the proportion of browsing-resistant metal fibers is 1% to 5% of the total weight. As a result, provided that the long-term stability is adequate, the remaining 95% remain available for essential, conventional components of a fire-protection composition.
[0012] Advantageously, the browsing-resistant metal fibers have a length of more than 20 mm, so that they are embedded over a greater length and the work, required to pull them out, is greater than that required to pull out conventional fibers and is beyond the capabilities of small animals.
[0013] Advantageously, the browsing-resistant metal fibers have a diameter of 20 μm to 200 μm, so that the bending resistance is greater than that of conventional fibers and cannot be overcome by small animals. The browsing-resistant metal fibers, with a fiber diameter of 20 μm and a, length of 20 mm act like needles and, during browsing, become hooked in the flesh of rodents.
[0014] Advantageously, the browsing-resistant metal fibers have a diameter of less than 600 μm and a length of less than 30 mm, because, beyond this, the effect through injury decreases significantly.
[0015] Advantageously, the browsing-resistant metal fibers are standardized steel wire fibers for use in reinforced concrete and are available technologically in large numbers.
[0016] Advantageously, the browsing-resistant metal fibers consist of a corrosion-resistant material such as stainless steel or brass, so that the long-term stability is increased further.
[0017] Advantageously, the fire-protection composition has material capable of intumescing, so that it expands when overheated.
[0018] Advantageously, the browsing-resistant metal fibers are a component of a composite structure, such as an intumescing fabric, as a result of which the textile fabric itself, which is disposed on the outside, is protected against browsing by small animals.
[0019] Advantageously, the intumescing fabrics with the browsing-resistant metal fibers are needle-punched at least partly, which, moreover, contribute to the internal bonding of the composite structure.
[0020] The invention is described in greater detail with respect to three advantageous examples with a formulation for each:
[0021] A: a silicone polymer composition, which is difficult to ignite
[0022] B: and intumescing sealing composition
[0023] C: and intumescing tape/wrap for plastic pipes
1|
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AAmountTolerancesChemical Name
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1Silicone polymer38.0% ±10%α, ω-polydimethylsiloxane glycol
2Silicone plasticizer14.0% ±7% α, ω-trimethylpolydimethylsiloxane
3Catalyst0.5% ±0.3%Dibutyl tin dilaurate
4Fillers, pigments12.5% ±10%Chalk, talcum, clay, shear spar, iron
oxide pigments, titanium dioxide,
carbon black
5Cross-linking4.7%±2% Butanone oxime-vinyl silane
agent(alternatively alkoxysilanes,
methoxysilanes, ethoxysilanes or
mixtures)
6Adhesion0.8% ±0.5%(3-aminopropyl) triethoxysilane
promoter
7Thickener4.0%±3% Aerosil
8Ablative filler23.0% ±10%Aluminum trihydrate (ATH)
9Metal fibers2.5%±2% Stainless steel fibers or brass,
diameter 200μ; length 20 mm
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BAmountTolerancesExample
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1Acrylate dispersion35.0% ±10%Acronal 81D
2Plasticizer10.0% ±7% Dioctyl phthalate
3Dispersant0.5% ±0.3%Emulphor
4Fillers 35%±15%Chalk, talcum, clay
5Expanded graphite (or an 15%±7% Nordmin
intumescing mixture of
ammonium poly-phosphate,
melamine and penta-
erythritol)
6Thickener2.0% ±1.5%Aerosil, cellulose ether
7Steel wire fibers2.5%±2% Steel fibers, diam. 300μ,
length 20 mm Harex GSF
20
8Additives for stabilizing ash5.0%±2% Zinc borate, powdered glass
crust
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CAmountTolerancesExample
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1Polyvinyl acetate dispersion35.0% ±10%Makrovil D 3630
2Dispersant0.5% ±0.3%Emulphor
3Ash crust stabilizer15.0% ±10%Ammonium polyphosphate,
zinc borate
4Expanded graphite 35%±15%Nordmin
5Thickener2.0% ±1.5%Aerosil, cellulose ether
6Steel wire fibers2.5%±2% Harex GSF 20
7Fillers 10%±10%Chalk, talcum, clay, shear
spar,
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[0024] The mixture can be extruded and dried. However, panels can also be pressed, dried and cut to size. The formulations generally have very wide tolerances, so that a broad spectrum of viscosities, tensile strengths and intumescences can be formulated. For producing panels, the mixture, before it is dried and cured, can be applied on a textile backing material or on a fiberglass fabric and pressed, so that, during drying, there is bonding to form a fabric.
Claims
- 1. A fire-protection composition containing metal fibers, wherein browsing-resistant metal fibers are present.
- 2. The fire-protection composition of claim 1, wherein the proportion of browsing-resistant metal fibers is between 1 percent and 5 percent of the total weight.
- 3. The fire-protection composition of claim 1, wherein the browsing-resistant metal fibers have a length of at least 20 mm.
- 4. The fire-protection composition of claim 1, wherein browsing-resistant metal fibers have a length of not more than 30 mm.
- 5. The fire-protection composition of claim 1, wherein the browsing-resistant metal fibers have a fiber diameter of 20 μm to 600 μm.
- 6. The fire-protection composition of claim 1, wherein the browsing-resistant metal fibers are conventional steel wire fibers for concrete.
- 7. The fire-protection composition of claim 1, wherein the browsing-resistant metal fibers consists of a corrosion-resistant material such as stainless steel or brass.
- 8. The fire-protection composition of claim 1, wherein the browsing-resistant metal fibers are a component of a composite structure.
- 9. The fire-protection composition of claim 8, wherein the composite structure with the browsing-resistant metal fibers is needle-punched at least partly.
- 10. The fire-protection composition of claim 1, wherein said composition has an intumescing material.
Priority Claims (1)
Number |
Date |
Country |
Kind |
102 12 066.8 |
Mar 2002 |
DE |
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