SU1286670A1 - Coating for field tracks and sports grounds - Google Patents

Abstract

The invention relates to the field of construction, namely, to the treadmills of stadiums, athletic fields and other sound-absorbing and heat-absorbing surfaces. The purpose of the invention is to ensure the stability of the hardness of the surface of the coating and increase its elasticity. The coating comprises rubber or polyurethane yarns 2 laid on the base 1 and composition 3 based on low molecular weight rubber. The length of the filaments is 5-40 cm, the content is 10-60% by weight of the coating. In operation, the rubber or polyurethane yarns 2 absorb the stress and are deformed together with the composition, contributing to the redistribution and leveling of the stresses in the coating. As a result, the strength properties of the coating, elasticity, and the stability of the surface hardness of the coating are ensured. 3 il. 1 tab. (L

Description

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The invention relates to the construction, namely to the surfaces of the racetracks of stadiums, athletic fields and other sound absorbing and heat absorbing surfaces.

The purpose of the invention is to ensure the stability of the hardness of the surface of the coating and increase its elasticity.

FIG. Figure 1 shows the coating with the arrangement of reinforcing threads along the direction of the action of the support reactions of the section; in fig. 2 - the same, with the arrangement of the reinforcing threads perpendicular to the direction of action of the support reactions; in fig. 3 - the same, with a random arrangement of reinforcing filaments. The coating includes folded 2 threads or polyurethane yarn 2 and composition 3 based on low molecular weight rubber.

The coating works as follows.

Under the action of compressive, tensile and shear forces on the coating, the composition 3 based on low molecular weight rubber is deformed. Rubber and polyurethane yarns | 2, evenly distributed in the coating volume and penetrating composition 3, experience the stresses that occur and are deformed together with the composition, contributing to the redistribution, alignment and reduction of stresses in the coating. As a result, the reinforcement effect is manifested. strength properties of the coating, elongation, elasticity, ensures the stability of the surface hardness of the coating.

Due to the uniform distribution in the volume of the coating of reinforcing yarns, the absence of clumping and the formation of balls of yarns, the hardness of the coating surface is maintained, and the relative elongation and elasticity of the coating increases.

The coating is formed by uniform laying on the basis of rubber or polyurethane filaments, followed by pouring the liquid composition. based on low molecular weight rubber, which impregnates the laid yarns and provides high adhesion to the base. After curing the liquid composition, in which rubber or polyurethane threads are distributed, a monolithic elastic layer is formed.

Example 1 Rubber threads are laid on the basis in quantities of 2 kg per 1 m, obtained from a mixture based on natural latex, 50 mm in length, up to A mm in the direction of the support reactions of the coating (see Fig. 1) . The laid yarns are poured with a composition based on low molecular weight polydiene urethane-dispoxy rubber in the amount of 8 kg per 1 m, ensuring the impregnation of the laid rubber yarn to the base and the formation of the upper layer of the composition 2-4 mm thick of the following composition, parts by weight:

Rubber PDI-ZAK

Dibutyl phthalate

a piece of chalk

Kaolin

Redoxide

Polye tylenpolyamine

White Spirit

100 90

120 70 10

4 30

five

five

five

The coating is left for 24-72 hours at 15-30 ° C. After curing, a monolithic elastic coating with good adhesion to the base, reinforced with rubber threads, is formed. The content of the reinforcing material in the coating is 20% by weight of the coating.

Example 2. The coating is made according to the technology described in Example 1. Instead of rubber threads, polyurethane threads are used with a length of 150 mm. Layer thickness of laid yarn is 3 mm, weight of yarn is 1 kg per 1 m.

The content of the reinforcing material in the cured elastic coating is 10% by weight of the coating.

Example 3. The coating is manufactured according to the technology described in example 1; Instead of rubber threads, polyurethane threads are used with a length of 100 mm. Layer Thickness

4 mm.

consumption 2 kg per 1 m

0

five

The content of the reinforcing material in the cured elastic coating is 20% by weight of the coating.

Example 4. The coating is made according to the technology described in Example 1. Instead of rubber threads, polyurethane threads are used with a length of 100 mm. Thickness of the laid threads of 4 mm, weight per 1 m 2 kg. Instead of the composition based on low molecular weight polydiene urethane dian epoxy rubber PDA-ZAK, a composition based on low molecular weight rubber with hydro3128 is used.

strong end groups of the following composition, ma.ch.

Rubber SKD-GTR 100

Toluene diisocyanate 10

Dibutyl Dilaurenate

tin0.05

Redoxide5

The consumption of this composition is 8 kg per 1 m. The content of the reinforcing material in the cured elastic coating is 20% of the coating mass. Example 5. The coating is made according to the technology described in Example 1. Instead of rubber threads, polyurethane threads are used with a length of 100 mm. Thickness of the laid threads of 4 mm, Consumption per 1 m 2 kg. Instead of a composition based on low molecular weight polydienurethane epoxy rubber, use is made of a composition based on FP-65 polydiene diisocyanate of the following composition, m.ch .:

Polydiene Diisocyanate FP-65 100

Chalk 50

Triethanolamine 3

Dimethylbenzylamine 3

Redoxide5

The consumption of the composition per 1 m of the coating is 8 kg. The content of the reinforcing material in the cured elastic coating is 20% by weight of the coating.

Example 6. On the base, Spandex polyurethane filaments are laid with a length of 100-200 mm, a layer of up to 4 mm in the direction of the support reactions of the coating in an amount of 3 kg per 1 m. Polyurethane filaments with a length of 100-200 mm are laid on top up to 4 mm in a direction 3 kg per 1 m. The top layer is applied, evenly with a liquid self-curing composition of a composition specified in example 1 with a thickness that impregnates all layers of polyurethane filaments to the base; 2-4 mm. Consumption of the composition is 4 kg per 1 m. The coating is held for 24-72 hours at 15-30 C. After solidification, a monolithic elastic coating is formed, possessing good adhesion to the base. The content of the reinforcing material in the coating is 60% by weight of the coating.

Example 7. Based on randomly laid polyurethane

O4

yarns 300-400 mm long with a layer up to –12 mm in the amount of 6 kg per 1 m.

A layer of liquid self-curing composition specified in example 1 with a thickness that impregnates the laid polyurethane filaments to the base and arranges the top layer of the composition with a thickness of 2-4 mm is applied evenly on top. Consumption of the composition is 6 kg per 1 m. The coating is kept for 24 hours at 15-30 ° C. After curing, a monolithic elastic coating is formed, which has high adhesion to the base. The content of the reinforcing material in the coating is 50% by weight of the coating.

The properties of the proposed coatings in examples 1-7, as well as known are given in the table.

As can be seen from the table, the hardness of the proposed coatings over the entire surface is stable and reaches 50-52 units. according to TM-2, which ensures the same reaction of the support to the acting forces over the entire surface of the coating.

The relative elongation of the proposed coatings reaches 550-750%, T; .e. 3-5 times bigger than the famous ones.

High deformation properties, stability of the surface hardness of the coating, high elasticity with high strength allows to create the most comfortable conditions for athletes, reduce injuries and increase the service life of the coating.

Claims (1)

Invention Formula Covering treadmills and sports fields, comprising an elastic layer laid on the base of a composition based on low molecular weight rubber with reinforcing material, characterized in that, in order to ensure stable surface hardness of the coating and increase its elasticity, polystyrene rubber is used as a low molecular weight rubber. - diepoxides, or polydienediols, or oligodienediisocyanates, and the reinforcing material is made of rubber or polyurethane filaments 5-40 cm long, and the content the reinforcing material in the composition is 10-60%. Hardness up Relative elongation at rupture,% along the support reaction line 450 across the line of action of the supporting reactions 170 Relative elongation in violation of the monolithic sample,%, when stretching along the line of action of support reactions 450 across the line of action of the supporting reactions 170 Elasticity by rebound,% 48 Residual elongation,% 2 Resistance breaking at stretching, MPa along the line of support reactions1, 3 across the line of action of the support reactions 1,1 49 50 50 50 52 52 40-46 30-60 450 550 450 450 750 650 140 145 155 175 175 165 750 650 140 145 450 550 550 450 750 650 140 65 155 175 175 165 750 650 140 35 46 48 48 48 50 50 44 25-28 34 1.2 1.35 1.3 1.2 1.5 1.5 1.1 1.15 1.15 1.1 1.5 1.5 1 1.15 34 1 1.15 The hardness and elasticity of the coatings were determined in areas located 30 mm in length over a 300 mm sample. U / G ////// /// /// /// /// /// /// // // // Phage. 3