RU2358999C2 - Thermoplastic composition spray-plastic for roadbed marking by means of pressure spraying - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: composition of spray-plastic contains the following components as film-forming substance - aliphatic hydrocarbon resins or their mixtures with glycerin or pentaerythritol ester of white resin in combination with block-copolymer on the basis of styrene and isoprene. Plasticiser used is represented by esters of aromatic acids or paraffin mineral oils.

EFFECT: increased elasticity and wear resistance of spray-plastic.

1 cl, 1 tbl, 1 ex

Description

The invention relates to the creation of a spray plastic composition for marking a roadbed with an asphalt concrete coating in order to ensure road safety.

The known composition of the spray plastic, including as a film-forming polyester resin, plasticizer, titanium dioxide, anti-sedimentation additive, glass beads, mineral filler, wax, surfactants (patent No. 2217459), which we adopted as a prototype.

Its disadvantages are:

- a low level of softening temperature, which leads to a change in the geometric dimensions of the strips during operation associated with the rolling of the material;

- low level of wear resistance due to insufficient elasticity of the material, especially at low temperatures (below 0 ° C).

The invention solves the problem of creating an elastic composition of the spray plastic that does not collapse at low temperatures with a high softening temperature.

The task is achieved by using aliphatic hydrocarbon resins with rosin resins (pentaerythritol and glycerol rosin esters) as a film-forming composition in the spray plastic composition in a weight ratio of 50 / 50-100 / 0 in combination with special additives (styrene copolymers with unsaturated aliphatic hydrocarbons), increasing the elasticity of spray plastic at low temperatures when using aromatic acid esters such as dibutyl phthalate, dioctyl phthalate and plasticizers other or paraffin mineral oils with tsp> 210C °.

The combination of these components in the spray plastic composition in a certain ratio can significantly increase its elasticity and, accordingly, its wear resistance.

In addition, the material softening temperature rises significantly.

The content of the components included in the spray plastic is as follows, wt.%:

specified film-forming 15.0-25.0 specified plasticizer 2.5-4.5 styrene-isoprene block copolymer 0.2-1.5 kaolinite 0-4.0 titanium dioxide 2.0-10.0 glass beads 0-30,0 stearic acid 0.2-1.5 polyolefin wax 0.5-1.5 mineral filler (quartz sand, chalk, microcalcite, etc.) rest

The results are illustrated by examples.

Example 1. Take a sample of components for a particular composition (see table), mix and melt the mass at a temperature of 200 ± 10 ° C for at least 2 hours. The obtained melt is used for sample preparation. Examples of compositions are presented in table 1

Compositions of spray plastics and their properties

Table 1 Indicators Spray Compositions Prototype one 2 3 four Polyester resin with 45% terephthalic acid, wt.% 29th - - - - Adipic acid and ethylene glycol polyester, wt.% 2.0 - - - - The degradation product of polyethylene terephthalate with ethylene glycol, wt.% 2.0 - - - - Aliphatic hydrocarbon resin wt.% - 15.0 12.6 17.5 18,4 Rosin pentaerythritol ester, wt.% - - - 1,0 - Rosin glycerin ester, wt.% - - 5,4 - 6.6 Dioctyl phthalate, dibutyl phthalate, wt.% - 2.5 3.3 3,7 - Paraffin mineral oil, wt.% - - - - 4,5 Block copolymer based on isoprene and styrene, wt.% - 0.2 0.7 0.8 1,5 Kaolinite, wt.%, 4.0 - - - 4.0 Titanium dioxide, wt.% 7.0 2.0 5,0 5,0 10.0 Glass beads, wt.% 15.0 - 15.0 15.0 30,0 Quartz sand, wt.% 40.5 61.6 41 34 22.0 Microcalidite, wt.% - eighteen 16 22 twenty Stearic acid, wt.% 0.2 0.2 0.2 0.2 1,5 Polyethylene wax PV-200, wt.% 0.3 0.5 0.8 0.8 1,5 The flow rate of the melt, g / s 14,4 13.3 14.3 14,4 15.6 Softening point, ° С 81.8 91.4 91.3 90.5 92.5 Wear resistance,% 2 months later 4,5 0.3 - - - In 3 months 13.3 4,5 - - - The compressive strength, kg / cm ² and the physical condition of the samples during compression at a temperature, ° C - +20 473 is not destroyed. 41.0 is not destroyed. 79.6 is not destroyed. 40.0 is not destroyed. 21.4 is not destroyed. 0 426 fragile destruction. 180 is not destroyed. 151 is not destroyed. 183 is not destroyed. 164 is not destroyed. -10 - 302 not destroyed., No cracks 278 not destroyed., No cracks 255 not destroyed., No cracks 295 not destroyed., No cracks

Claims (1)

The thermoplastic composition of the spray plastic for marking the roadway by spraying under pressure, including a film-forming substance, a plasticizer, titanium dioxide, wax, stearic acid, a mineral filler, optionally kaolinite and glass beads, characterized in that it contains aliphatic hydrocarbon resins as a film-forming or mixtures thereof with glycerol or pentaerythritol rosin esters in combination with a styrene-isoprene-based block copolymer when used as e plasticizer esters of aromatic acids or paraffinic mineral oils, and its constituent components are taken in the following ratio, wt.%:
specified film-forming 15-25 specified plasticizer 2.5-4.5 styrene-isoprene block copolymer 0.2-1.5 kaolinite 0-4 titanium dioxide 2-10 glass beads 0-30 stearic acid 0.2-1.5 polyolefin wax 0.5-1.5 mineral filler selected from the group including quartz sand, chalk, microcalcite rest