A water-dispersible fluorescent fluorescent paint

 

The invention relates to a paint coating of the fluorescent type, namely the composition of a water-dispersible fluorescent fluorescent paint can be used for applying the signal label to paint the road, navigation, aerodrome signs and may find wide application in various industries and agriculture. Describes a water-dispersible fluorescent fluorescent paint containing film-forming - 50% stirolakrilat dispersion, the thickener is an acrylic thickener, fluorescent pigment-based thermoplastic melamineformaldehyde resin, dispersant - 30% aqueous solution of ammonium salts of polyacrylic acids and hydrophobic siliconsamurai the non and the ultraviolet absorbent is derived dihydroxybenzophenone, 30% of which is from the prescription of the quantities injected into the film-forming, and the remaining 70% in the total mixture. A water-dispersible fluorescent fluorescent paint can improve the consumer properties of the finished product, to provide high aggregate stability of the paint during storage and when using all known fluorescent pigments, significantly improve sitechristian fluorescent type, which can be used for applying the signal label clearly visible with diffused light to paint the road, navigation, aerodrome signs, for applying distinctive signs on plant equipment for marking of aircraft, can be used in various industries and agriculture.

Known fluorescent fluorescent paint based on polyacrylic, kremnijorganicheskih and acrylamide resins. The use of polyacrylic resins were found to be inappropriate due to the high viscosity of concentrated solutions of these resins, paints have to be diluted for application with a spray gun, which necessitates the application of numerous layers (up to 5 layers) to achieve the desired coating thickness and achieve the effect of reflection.

The disadvantage of these paints is also a need for more nanesenia on the fluorescent coating of varnish filter containing antioxidants, which transform or absorb UV component of daylight (300-400 nm), reducing its harmful effects on the floor, however, the fastness is not large enough (3-6 months) [Paint materials and their applications, M.: the State is e equipment improve visibility on land vehicles, aircraft. The composition of the fluorescent coatings include fluorescent pigments finely dispersed particles of resin, painted with fluorescent dyes. A significant part absorbed from the surrounding space and energy these coatings give back, reflecting, and the unabsorbed portion of the incident light.

The disadvantage of these coatings is also the need for varnish filter to improve their lightfastness. Even so, the weather resistance of the coating is low, the paint has a tendency to stratification during storage [Reibman A. I. Protective paint coating. Chemistry. Leningrad branch, 1982, S. 243-244].

The closest in composition, purpose and effect is achieved is a water-dispersible fluorescent fluorescent paint containing polyvinyl acetate emulsion (41-60%), pigment (21-30%), carboxymethylcellulose (0,25-0,6%), glycerol or ethylenglycol (1.7 to 3.8 percent), sodium salt butylnaphthalene-1-sulfonic acids (0,8-1,5%) [A. S. USSR 331079, MKI 09 D 5/22, 09 D 3/74. publ. Bull. 9, 1972 - prototype].

The disadvantage of the composition are poor indicators light and weather resistance, the need for additional is their antioxidants, but even this measure does not lead to significant improvements in the above indicators paint.

The basis of the invention the task is improving the water-dispersible fluorescent fluorescent paint through improved consumer properties due to the introduction of the set of components in a certain ratio, which helps to ensure a finished product of high aggregate stability of the paint during storage when using all known fluorescent pigments, as well as by the introduction of the antioxidants at certain stages, which can significantly improve the light and weather resistance of the finished product and prolong the service life of the coating.

This object is achieved due to the fact that the water-dispersive fluorescent fluorescent paint containing film-forming, fluorescent pigment, a thickener, a dispersant and water, according to the invention, as film-forming contains 50% stirolakrilat dispersion, as a thickener is an acrylic thickener, pigment, fluorescent pigment-based thermoplastic melamineformaldehyde resin as a dispersant - 30% aqueous solution ammonitovye absorbent - derived dihydroxybenzophenone, 30% of which is from the prescription of the quantities injected into the film-forming, and the remaining 70% in the total mixture in a ratio of components, wt.%: 50% Stimulationa variance - 17,0-25,0 Fluorescent pigment-based thermoplastic melamineformaldehyde resin - 24,0-36,0 Acrylic thickener - 0,2-0,3 30% Aqueous solution of ammonium salt of polyacrylic acid of 0.1 - 0.2 Gidrofobny siliconsamurai the non - 0,1-0,2 Ultraviolet absorbent - derived dihydroxybenzophenone - 0,5-1,0 Water - the Rest Use as film-forming copolymer of acrylate and the introduction of an antioxidant (ultraviolet absorbent) in the film-forming and the mix can improve the light resistance and weather resistance are covered with not less than 12 months. Application as in the prototype of the protective layer using varnish-filter is not possible to achieve these targets, which are achieved with the use of this composition.

The use of dispersant and thickener acrylate type when the claimed ratio of components eliminates the tendency of the paint to flake when stored.

The invention is illustrated by the following examples get vesperia
The fluorescent pigment-based thermoplastic melamineformaldehyde resin
- Acrylic thickener type
A dispersant acrylic type - 30% aqueous solution of ammonium salt of polyacrylic acid
The non - hydrophobic siliconsamurai component
- Reactive absorber of ultraviolet rays - Supplement company EFKA (EFKA - 6725) - derived dihydroxybenzophenone
- The active substance: 95-100%
- Density at 20oFrom: 1.025-1.065 g/MS3
- Flash point: 200oWith
Appearance: slightly colored liquid
The procedure for preparation of paint next.

In a container with a stirrer download demineralized water, film-forming with the content of the ultraviolet absorber (absorber UV rays) - 30% from prescription number to Include in a stirrer-mixer. After stirring download dispersant, thickening agent and a pigment. Stirring is carried out to obtain a homogeneous mass. The resulting mixture was dispersed using dissolver. After dispersion in pigmentary paste download half portion of non and low speed are mixing to obtain a stable composition. 10 minutes before the end of paramasivan the indicator of UV rays). Prepared paint before testing if necessary, dilute with water to a viscosity of 20-30 with the viscometer VZ-246 or VZ-4 with the nozzle diameter of 4 mm at a temperature of 20+0,5oC. Filtered through the grid 1 according to GOST 6613 and put in 1-2 layer on the prepared plate, covered with white paint. Recipe known and offered paints are shown in table 1. The results of the tests in table 2.

From the data of tables 1, 2, it is seen that the proposed paint (examples 2-5) compared to the prototype, known protected with a varnish-filter for more 2-4 times the length of trials has a light-fastness 4-5 points on a 5-point scale ( compared with the prototype-3-4 points) and the weathering of coatings 6-8 points on 8-point scale, compared with 4-5 points on the prototype.

In example 3, the lower concentration of ultraviolet absorbent (UV-absorber) there is a decrease in the time trials from 12 to 10 months, so further reducing the concentration of absorber (absorber UV rays) is impractical. With exorbitant concentration of absorber (absorber UV-rays) (example 6), the decrease of the weather. Test the paint on the propensity for delamination during storage showed that the proposed paint AGR is luorescence paint can improve the consumer properties of the finished product, to provide high aggregate stability of the paint during storage and when using all known fluorescent pigments, significantly improve the light and weather resistance of the paint.


Claims

A water-dispersible fluorescent fluorescent paint containing film-forming, fluorescent pigment, a thickener, a dispersant and water, wherein as the film-forming it contains 50% stirolakrilat dispersion, as a thickener is an acrylic thickener, pigment, fluorescent pigment-based thermoplastic melamineformaldehyde resin as a dispersant - 30% aqueous solution of ammonium salts of polyacrylic acids and hydrophobic siliconsamurai the non and additionally ultraviolet absorbent - derived dihydroxybenzophenone, 30% of which is from the prescription of the quantities injected into the film-forming, and the remaining 70% - in the mix at the ratio of components, wt.%:

50% Stimulationa dispersion of 17.0-25,0

Fluorescent pigment-based thermoplastic melamineformaldehyde resin 24,0-36,0

Acrylic thickener of 0.2-0.3

30% Aq-0,2

The ultraviolet absorbent is derived dihydroxybenzophenone 0,5-1,0

Water The Rest

 

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