Waterproofing composition for coating capacitive structures

 

(57) Abstract:

Use: in the construction and paint industries, to receive waterproofing coatings. The inventive composition comprises, %: high impact polystyrene or waste 20-50 ; dimethylphthalate 3-6; glycerol ester of rosin 2-7; diethyl ester of carbonic acid 5-15; toluene - rest. Polystyrene or waste pour solvent. The mixture was incubated day for swelling and subsequent dissolution of the polystyrene. Stirred for about one hour. The mixture is brought to a working dissolution, complete dissolution of polystyrene granules. 7 table.

The invention relates to the field of production and application of compositions on the basis of polystyrene intended to receive waterproofing coatings, mainly on the surface of the concrete and liquid capacitive structures for drinking water, and can be widely used in industrial, civil and road construction.

Known composition for coating consisting of polystyrene grades UPM-0503 or UPM-0509 and an organic solvent and applied by spraying on the inner surface of the reinforced concrete structures of one or more layers [1]

Not the coating to the concrete surface, the possibility of formation and coating cracks, delaminations, peeling, chipping and cracks in the coating on concrete surface with high humidity and when exposed to alternating temperatures, low aesthetic qualities.

Closest to the invention to the technical essence is a waterproofing composition to cover the capacitive structures of drinking water supply, including polystyrene, a plasticizer ester of rosin and organic solvent [2]

This composition is intended for the manufacture of varnish applied on the tree, artificial stone and separately for its components and ready-made does not meet the requirements for coatings used in domestic water supply.

The purpose of the invention to improve the quality and aesthetics of the coating by giving it impact resistance, frost resistance, improve adhesion and water resistance.

This goal is achieved by the fact that the waterproofing composition for coating capacitive structures comprising polystyrene, a plasticizer ester of rosin and an organic solvent, according to the invention, contains a high impact on the R rosin, as the organic solvent toluene and addition of diethyl ester of carbonic acid, in the following ratio, wt.

High impact polystyrene

or waste 20-50,

Dimethylphthalate 3-6

Glycerin ether

rosin 2-7

Diethyl ether coal-

Noah acid 5-15

Toluene Else.

The coating has a high level of adhesion, frost resistance, water resistance due to the introduction of polystyrene composition glycerol ester of rosin, high elasticity and strength of the film due to the complex composition of phthalates of dimethylphthalate. The acceleration of the formation of the coating is achieved by entering into the composition of diethyl ether (diatoma) anaesthetic substances acting in the composition as siccative accelerator reaction during formation of the coating. Aesthetics is achieved through the use of color high impact polystyrene or their waste. For formation of a coating on the workpiece surface are first applied intermediate layer and then coating layers. The intermediate layer compositions are applied by impregnation of the concrete surface when the ratio of the content of high-impact p the>/P>Comparative characteristics of this composition and the composition of the prototype is given in tab.1.

Used high impact polystyrene or waste is a product of copolymerization of styrene and rubber, produced in mass in the presence of a solvent. For the preparation of compositions can be used in high impact polystyrene in accordance with the requirements of OST 6-05-406-80 and THE 6-05-1871-79 "E" and their industrial waste in accordance with the requirements of TU-6-05-1918-82 or secondary waste (housing household equipment telephone sets, juicers, radio and TV, and others). Can be used polystyrenes sverhudachnyh brands oops-1104 or UAM-1003; UPM-523, polystyrenes low impact resistance UPM-L, UPM-225 and, mainly, polystyrene, medium impact resistance grades UPM-L, COC-L, COC-S, UPM-L, COC-S, COC-0505, UPM-0508. Can be used polystyrenes brands oops-0801, COC-10-1002, UAM-0503, COC-O, UPM-325, UPM-424 with low content of residual monometr recommended for the manufacture of products and packaging intended for food contact and other

High impact polystyrene produced (or crushed) until homogeneous granules (painted or not) of size 2-5 mm Content is LASS="ptx2">

Basic physical and mechanical properties of high impact polystyrene must meet the requirement:

impact strength,

kgf cm/cm24-13

ultimate tensile stress

tensile, MPa 20-30

elongation

at break, not less than 15-45.

High impact polystyrene is resistant to halogen, some mineral and organic acids.

Glycerol ester of rosin must meet the requirements of OST 81-26-78.

Characteristics used glycerol ester of rosin are given in table.2.

Dimethylphthalate-phthalates (GOST 8782-77 "E") are products of the interaction between the anhydride orthophtalic acid with alcohol. In table.3 illustrates the properties of dimethylphthalate.

Diethyl ester of carbonic acid (C5H10ABOUT3-diatom. Colorless liquid narcotic effect. The product must meet THE 113-03-0376-84 and contain at least 96,6% of the basic substance.

As a solvent of high impact polystyrene or its waste, using toluene. Its characteristics are given in table.4.

According to the results of sanitary-chemical analysis of water vitagen composition of the following components,wt.

High impact polystyrene

or waste 20-50

Glycerin ether

rosin 2-7

Dimethyl phthalate 3-6

Diethyl ether coal-

Noah acid 5-15

Toluene is the solvent Else.

Examples of embodiment of the invention are given in the table.6.

The composition is prepared as follows. The estimated number of high impact polystyrene or its waste, with stirring, pour the solvent, which is taken from the calculation of obtaining the ratio of 1:4. The mixture was incubated day for swelling and subsequent dissolution of polystyrene by stirring for about one hour. For mixing can be used agitators. The mixture is brought to a working condition complete dissolution of polystyrene granules. The estimated amount of the glycerin ester of rosin dissolved under stirring for 0.5 h in the selected solvent. In a solution of high impact polystyrene or its wastes under stirring enter solution glycerol ester of rosin, dimethylphthalate and diethyl ester of carbonic acid (diatom). Part of the ready to use composition at a ratio of 1:4 content high impact polystyrene or waste solvent by increasing with the device primer-impregnating layer (substrate), then with an interval of 20-30 minutes put the desired number of layers with the concentration of polystyrene in a solvent of 1:4.

The optimal number of layers for waterproofing coatings depending on the operating conditions of the facility is equal to 3-6. The thickness of the waterproofing coating is 1-2 mm When applying a waterproofing coating polystyrene composition at the surface is applied by brush, air or airless spraying.

In table. 6 summarizes the data on the ratio of initial components polystyrene compositions made in the claims and shown in the three boundary options (min, max, AVG) recipe. These data are fully consistent.

For various technical means and methods of coating (air, vacuum, sputtering, etc.) polystyrene compositions are manufactured in different concentrations, i.e., with different viscosity. Working viscosity of polystyrene composition according to GOST 8420-74 picked by adjusting the dosage of the solvent using a viscometer of the OT-4 according to GOST 9070-75. For the vast majority of high-impact polystyrene (OST 6-05-406-80) and industrial waste (TU-6-05-1 is latarjet requirements applying polystyrene coatings, for example aggregates airless spraying type N and N (up to 300), widely used in the device of waterproofing coatings waterworks.

Glycerol ester of rosin dissolved in toluene in a 1:1 ratio given in the General flow of solvent in the composition.

For device coatings do not have contact with drinking water for dissolving polystyrene can be used and other types of solvents.

In table. 7 shows data on the basic physical and mechanical properties of waterproofing coatings on the basis of the assumed compositions offer and control structures.

Created polymer composition satisfies the high physical-mechanical and other special requirements:

largest adhesion to the concrete surface vodoemkost facilities;

waterproofing of a piece of concrete-polymer coating for various conditions of safe operation of the facility;

to meet the requirements of SNiP 2.04.02-84, GOST 2874-82, the requirements of the chief sanitary-epidemiological control of the Ministry of healthcare of the USSR on sanitary-chemical and sanitary-hygienic indicators for economic Pitjeva the s components on the physico-mechanical and other special properties of this polymer compositions in coatings for minimum, the mean and maximum content of each component in the test examples, in this optimal composition and a known composition is shown in table.6 and 7. From table.7 shows that the selected optimal composition satisfies the highest requirements of the relevant standards in comparison with the known composition and coatings shows adhesion to concrete after a long freeze-thaw durability testing 3-5 times higher and the resistance is 2-3 times higher than the floor with a known composition.

Waterproofing composition for coating capacitive structures comprising polystyrene, a plasticizer ester of rosin and an organic solvent, characterized in that it contains polystyrene high impact polystyrene or waste, as the plasticizer dimethylphthalate, as ester of rosin glycerin ester of rosin, as the organic solvent toluene and addition of diethyl ester of carbonic acid in the following ratio, wt.

High impact polystyrene or waste 20 50

Dimethylphthalate 3 6

Glycerol ester of rosin 2 7

Diethyl ester of carbonic acid 5 15

Toluene Else

 

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