RU2201352C1 - Heat-resistant and fireproof material - Google Patents

Abstract

FIELD: manufacture of multi-layer heat-resistant materials used for operation in areas of intensive radiation and fire- fighting. SUBSTANCE: proposed hat-resistant fire-proof material is made on base of heat-resistant fibers with layer of pigmented fluorine-containing rubber on its outside on which coat of heat-reflecting metal, such as aluminum powder and unpigmented fluorine-containing rubber coat applied to it; on inner side, hydro- and heat- insulating coat is applied; this coat includes siloxane composition on base of heat-resistant low-molecular synthetic rubber compound and aerosil; pigmented fluorine-containing rubber and coat of external layer include vulcanizing agent, such as diamine. EFFECT: reduced mass; enhanced heat-protective properties and bending stability; low stiffness. 1 tbl

Description

 The invention relates to the production of multilayer heat-resistant materials and can be used in the manufacture of protective clothing and other products, such as wraps, covers, bedspreads, requiring increased resistance to heat for work in the zone of intense heat radiation, as well as open fire - when fighting fires .

 Known fire-retardant material, which is obtained by combining a metallized polyethylene terephthalate film with a fabric from hollow, non-profiled threads, partially filled with air (RF patent 2008044, class A 62 B 17/00, publ. 02.28.94).

 A disadvantage of the known material is its instability when exposed to an open flame, with a sudden increase in heat flux, since the polyethylene terephthalate film melts, exposing the fabric, undergoes thermal degradation, which affects the properties of the metal coating with the violation of the heat-protective properties of clothing during warping and peeling of the coating.

 Known composite material designed to protect against high temperatures and flame. The material contains a base made of Normex, or Cex, or Tyvek fabric, sequentially coated with a chemical protection layer made of butyl rubber, polyvilidene chloride, etc., and a layer of metallized heat-curing film. Material on the outside and inside covered with a film of flame retardant polyethylene, which glues together all layers of material (US patent 4792480, CL 32 V 27/00, 1988).

 In the known material, Normex, or Cex, or Tyvek fabrics taken as the basis have low heat resistance, which reduces the reliability of the material during operation at high temperatures.

 Known material has a low degree of reliability due to the presence on the outside and between the layers of the film, which melts at high temperatures.

 Known material has low frost resistance, as well as a complex and time-consuming manufacturing technology.

 Known material for clothing that protects against flame, which consists of a fibrous layer and a heat-reflecting layer of soft metal cloth (French patent 2489696, CL. And 62 In 17/00, 1982).

 Clothing made of such a material provides human protection in a certain temperature-time range, but has a large mass, which limits the possibility of its use and is a significant drawback.

 The closest in technical essence to the claimed one is a heat-resistant flame-retardant material, which consists of a heat-resistant fibrous layer, on which a thermal protection coating is applied on both sides in the form of layers of filled fluororubber, and a layer made of unfilled fluororubber, located on the outer surface of the heat-reflecting layer in contact its inner surface with one of the layers made of filled fluororubber, and which is a metallized coating (pat ie RF 2082469, class A 62 B 17/00, published 06.27.97 -.. a prototype).

The disadvantages of the known heat-protective flame-retardant material are as follows:
- applying on both sides of the heat-resistant fibrous coating layer in the form of layers of filled fluororubber gives a lot of weight to clothes made of such a material, which limits the possibility of its use;
- to strengthen the metal layer on the metal surface, a layer of unfilled fluororubber is applied, which reduces the reflection coefficient of thermal radiation;
- a material with a two-layer coating of filled fluororubber exhibits weak bending resistance, which also decreases due to poor adhesion of the heat-reflecting layer to the layer of filled fluororubber, as well as high rigidity.

 An object of the invention is the creation of a new heat-shielding flame-retardant material with reduced weight, increased heat-shielding properties, significant flexural stability and low stiffness.

 The technical problem is solved in that in a heat-insulating flame-retardant material based on heat-resistant fiber, having a layer of filled fluororubber on the outside, coated with a coating including heat-reflecting metal such as aluminum powder and unfilled fluororubber, and on the inside there is a thermal insulation coating, according to the invention of thermal insulation the coating is a siloxane composition based on synthetic rubber heat-resistant low molecular weight compounds - SKTN and aerosil, and on olnenny fluororubber coating and the outer layer comprise a diamine type vulcanizing agent.

Such heat-protective flame-retardant material has:
- reduced weight due to the application on the inner side of a layer of heat-resistant fiber instead of a layer of filled fluororubber lighter layer of siloxane composition;
- increased heat-shielding properties, due to the absence of a layer of unfilled fluororubber on the surface of heat-reflecting metal;
- increased bending resistance, firstly, due to the good adhesion of the heat-reflecting metal, which is mixed with a solution of unfilled fluororubber and a vulcanizing agent, and, secondly, due to the fact that the layer deposited on the inner side of the layer of heat-resistant fiber is more flexible, than a layer of filled fluororubber, a siloxane composition comprising a synthetic rubber heat-resistant low molecular weight compound with a filler (flexural stability reaches 100,000 cycles);
- low stiffness, which is especially important in a suit for firefighters made of such fabric, which is achieved due to the use of a siloxane composition in the composition of the material, including a synthetic rubber heat-resistant low molecular weight compound with a filler instead of a hard layer of filled fluororubber.

 The invention is illustrated by the following examples.

 Example 1

Heat-protective flame-retardant material contains a heat-protective flame-retardant layer of aramid fiber (TU 6-12-05763369-27-93), on the outside of which there is a layer of 50 to 100 g / m ² filled with fluororubber, which is a mixture of synthetic fluorines SKF-26 - 50 parts by weight and SKF-32 - 50 weight. hours (both according to GOST 18376), as well as filler - chalk (TU 044-42-95) in an amount of 10 to 30 parts by weight, magnesium oxide (TU 6-09-3023-79) in an amount of 2 to 6 parts by weight and a curing agent such as diamine (TU 6-00-04691277-194-97) in an amount of from 0.5 to 3.0 parts by weight

This layer is coated with from 30 to 50 g / m ² containing a mixture of unfilled fluororubber and a vulcanizing agent such as diamine (TU 6-09-3023-79) in an amount of 0.5 to 3.0 parts by weight, in which added aluminum powder in an amount of from 7.8 to 13.0 g / m ² .

 Unfilled fluororubber is a mixture of synthetic fluorine rubbers SKF-26 - 50 parts by weight and SKF-32 - 50 parts by weight (both according to GOST 18376) and magnesium oxide (TU 6-09-3023-79) in an amount of from 2.0 to 6.0 parts by weight

On the inner side of the aramid fiber layer, a layer of 10 to 30 g / m ^{2 of a} siloxane composition is applied, including a synthetic rubber heat-resistant low molecular weight compound - SKTN (TU 3840397-93) in an amount of 100 parts by weight, of which aerosil was used as a filler (TU 044-42-95) in an amount of 2-6 parts by weight

 Example 2

 Heat-protective flame-retardant material, similar to example 1 with the only difference that the layer of heat-resistant fiber is a fiberglass (TU 6-48-10-92).

 Example 3

 Heat-protective flame-retardant material, similar to example 1 with the only difference that the layer of heat-resistant fiber is a silica fabric (GOST 19170-73).

 The correctness of the choice of composition and the number of applied layers is illustrated by the following table.

 A comparative analysis of the claimed invention and the prototype reveals the distinctive features of the claimed material in comparison with the closest analogue, which allows us to conclude that the proposed solution meets the criterion of "novelty."

 The presence of distinctive features makes it possible to obtain a positive effect, expressed in the creation of a new heat-shielding fire-resistant material with reduced weight, increased heat-shielding properties, significant bending resistance and low stiffness.

 Since when examining the object of the invention in the patent and scientific literature, no solutions were found containing the features of the claimed invention other than the prototype, it should be concluded that the claimed invention meets the criterion of "significant differences".

 The application of the claimed invention in the production of multilayer heat-resistant materials ensures its compliance with the criterion of "industrial applicability".

Claims (1)

 Heat-resistant flame-retardant material based on heat-resistant fiber, having a layer of filled fluororubber on the outside, coated with a coating including heat-reflecting metal such as aluminum powder and unfilled fluororubber, and on the inside, a thermo-thermal insulation coating, characterized in that the thermo-thermal insulation coating is a siloxane composition on based on synthetic rubber heat-resistant low molecular weight compounds - SKTN and aerosil, and filled with fluororubber and coating externally th layer contain a curing agent such as diamine.

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