The heat storage material

 

(57) Abstract:

Describes thermal storage material consisting of a polymeric binder and heat-retaining substance. It differs in that it contains a polymeric binder composition based on the hydroxyl-containing Oligocene SKDP-N, MDI, glycerol and catalyst retinoblastoma, and as a heat storage substance is hydrated inorganic salts, providing the content of water of crystallization, is not less than 17% in thermal storage material in the following ratio, wt. hours : the hydroxyl-containing oligodon SKDP-N 100, the polyisocyanate 20-38, glycerin 1-5, catalyst retinoblastoma of 0.01-3.0, crystalline inorganic salts, providing the content of water of crystallization in the material is not less than 17% 50-200. The technical result - the development of thermal storage material, which allows to obtain coatings resistant to high temperature loads arising from the fire. 1 C.p. f-crystals, 1 table.

The invention relates to an elastic material, whose purpose is the protection of sites and structures from high-temperature heat fluxes and fields can be COI is ove (NH4)2CO3that includes Ba(OH)28H2O containing crystallization water.

(A. C. 1214707, C 09 K 5/02, 1986).

However, the temperature range of this composition lies in the range 29,0-147,5oC, which limits the scope of its application at high temperatures up to 150oC.

Known heat storage compositions based on crystalline different nature.

(Heat and choledocholytiasis materials/ C. N. Danilin, L. C. Bohr, A., Zalesov etc. - Krasnodar: KPI, 1981, S. 36-53).

However, the temperature range of their work lies in the range 17-75oC, and they represent a highly inelastic composition.

The closest are thermal storage material one-time actions, which is a composition based on a polymeric binder (epoxy resin or a mixture on the basis of two types of silicone rubber and heat-retaining substance (-polyformaldehyde or Polyoxymethylene). thermal effect of phase transition of POM - 170 kJ/kg, decomposition - 1500 kJ/kg thermal effect of decomposition-polyformaldehyde - 2700 kJ/kg

(Heat and choledocholytiasis material the crystals have the following disadvantage: in the temperature range 105-360oC they decompose with the formation of easily flammable products, which limits their applicability.

The task of the invention is:

- ability to develop flexible thermal barrier coatings, namely the development of thermal storage material, which allows to obtain coatings resistant to high temperature loads arising under fire.

During implementation of the invention receive the following technical result: increased resistance of heat-retaining material to the action of high temperature thermal fields in the temperature range 100-600oC in terms of contact with air.

This technical result is achieved in that the heat storage material consisting of a polymeric binder and heat-retaining substance comprises a polymeric binder composition based on the hydroxyl-containing Oligocene SKDP-N, representing a copolymer of butadiene with piperylene, MDI, glycerol and catalyst retinoblastoma, and as a heat storage substance is hydrated inorganic salts, providing the content of crystallization in nonahydrate of aluminium nitrate, the uranyl chloride Nickel sulfate heptahydrate magnesium or dihydrate potassium fluoride, in the following ratio, wt. hours: the hydroxyl-containing oligodon SKDP-N, representing a copolymer of butadiene with piperylene, 100, polyisocyanate 20-38, glycerin 1-5, catalyst retinoblastoma 0.01-3.0, hydrated inorganic salts, providing the content of water of crystallization in the material is not less than 17%, 50-200.

The invention consists in the fact that under the action of high temperature thermal field it undergoes a series of physical and chemical transformations involving endothermic effects. Moreover, the greatest contribution of the enthalpy loss of crystallization water ( Hdehydr.), enthalpy heat of bound water ( Hload.and enthalpy of evaporation ( Huse), thus they can be rank:

Huse> Hdehydr.> Hload.< / BR>
During these transformations crystallization water accumulates heat and thereby protects the polymer matrix of thermal load.

Thus, the use of crystalline inorganic salts allows to obtain an effective heat storage materials, sustainable qtnym and scientific and technical information sources and identify sources contains information about the equivalents of the claimed invention has allowed to establish that the applicant is not detected similar, characterized by signs, identical to all the essential features of the claimed invention, as defined from the list of identified unique prototype, as the most similar set of features analogue, has identified a set of essential towards perceived by the applicant to the technical result of the distinctive features in the claimed object set forth in the claims.

Therefore, the claimed invention meets the requirement of "novelty" by applicable law.

To verify compliance of the claimed invention to the requirement of inventive step, the applicant conducted a search of the known solutions in order to identify characteristics that match the distinctive features of the prototype of the characteristics of the claimed invention, the results of which show that the claimed invention is not necessary for the expert in the obvious way from the prior art because the prior art defined by the applicant, not the influence provided the essential features of the claimed invention transformations to achieve subretinally level by applicable law.

To obtain the proposed thermal storage material is prepared formulations with different contents of it. The composition is made based on hydroxyl-containing Oligocene SKDP-N (TU 38.303-01-29-90), MDI (TU 6-03-375-75), glycerin (GOST 6259-75) and catalyst retinoblastoma - tertiary amine.

As the polymer binder use composition based on hydroxyl-containing Oligocene SKDP-N, representing a copolymer of butadiene with piperylene (A. C. 1229214. Composition for coating/ B. N. Medvedev, A. M. Agrell, E. H. Krasnov):

The hydroxyl-containing oligodon SKDP-N, representing a copolymer of butadiene with piperylene - 100

The polyisocyanate - 24

Glycerol - 3

Tertiary amine - 0,6

Preparation of the proposed heat-retaining material is carried out in a paddle stirrer, ensuring thorough mixing of the ingredients of the mixture. The mixture is poured into a mold and maintained at room temperature (17-25oC) for 3 days. Then from the form using a knife remove the samples, which are further subjected to the test. The size of the form should provide samples corresponding to the requirements of GOST 21207-81. As at the time of the second material begins to destructivity and burn the convenient feature for analyzing the effectiveness of thermal storage material one-time action is the linear burning rate (Vg). Linear burning rate and the length of the charred part of the sample (L) are determined in accordance with GOST 21207-81. If the sample was Samosata before reaching the label on the sample, the time at the moment of its decay were taken during the extinguishing (twith).

The invention is illustrated by the following examples:

Example 1. In a paddle stirrer was placed 100 g of hydroxyl-containing Oligocene CCDP-N, 24 g of MDI, 3 g of glycerol, 0.6 g of tertiary amine and 100 g of nonahydrate of aluminium nitrate. The mixture was thoroughly stirred for 30 minutes Then poured into a mold and maintained at room temperature (17-25oC) for 3 days. Prepared samples are removed from the mold with a knife.

The composition and properties of the heat-accumulating material of example 1 are shown in table (1).

Example 2. At indicated in example 1 technology prepare heat-retaining materials, the composition of which is given in the table.

As can be seen from the table, the use of crystalline inorganic salts allows to obtain an effective heat is -6, see the table), increases the material's resistance to high temperature exposure. This is due to the endothermic effect of physico-chemical processes in crystalline and water-related, which it contains. During these transformations, the water accumulates heat and thereby protects the polymer binder from the heat load.

The selected composition of the polymeric binder is associated with the need for thermal storage material with the required properties. The claimed dosage ingredients in a polymeric binder, due to technological factors upon receipt of heat-retaining material.

The use of other types of crystalline inorganic salts (compounds 7-13) does not allow to obtain an effective heat storage materials. As can be seen from the table, they are during high temperature heat flux ignite and burn. In addition, they observed calipatria, which is undesirable from the point of view of preserving the shape and design of the product.

As can be seen from table, for more effective heat-retaining materials you want to use crystallohydrate magnesium sulfate, the dihydrate potassium fluoride.

The use of these crystalline eliminates calipatria, which is undesirable from the point of view of preserving the shape and design of the product.

Increasing doses of crystalline to 200 wt.h. (5) allows to obtain a material with L = 0 mm and twith= 0 sec, while calipatria missing. However, if you increase the dosage of hydrated more than 200 wt.h. worse technological properties of the composition.

The reduced content of hydrated up to 50 wt.h. (6) leads to a decrease in the content of crystallization water in the composition, it leads to calipatria that in some cases is acceptable and does not affect the achievement of the technical result.

From the table it is seen that the crystalline inorganic salts, providing the content of water of crystallization in the material in not less than 17% (compounds 1-6) provide effective heat storage materials with a total endothermic effect 512-2138 kJ/kg, which allows to achieve the claimed technical result.

Thus, the above data confirm that the implementation of the use of Appl is lacticinia thermal barrier coatings;

for the claimed invention in the form as it is described in the independent clause following claims, confirmed the possibility of its implementation using the above described in the application or known before the priority date tools and techniques;

the tool embodying the claimed invention in its implementation, is able to achieve perceived by the applicant of the technical result.

Therefore, the claimed invention meets the requirement of "industrial applicability" under the current law.

1. The heat storage material consisting of a polymeric binder and heat-retaining material, characterized in that it contains a polymeric binder composition comprising a hydroxyl-containing oligodon SKDP-N, representing a copolymer of butadiene with piperylene, polyisocyanate, glycerol and catalyst retinoblastoma, and as a heat storage substance is hydrated inorganic salts, providing the content of water of crystallization of not less than 17% in thermal storage material in the following ratio, wt.h.:

The hydroxyl-containing oligodon SKDP-N, pre is utilizator retinoblastoma - of 0.01 to 3.0

Hydrated inorganic salts, providing the content of water of crystallization in the material is not less than 17% - 50 - 200

2. The heat storage material under item 1, characterized in that the hydrated inorganic salts it contains nonahydrate of aluminium nitrate, uranyl chloride Nickel sulfate heptahydrate magnesium or dihydrate potassium fluoride.

 

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