Composition for manufacturing a decorative material and a method of manufacturing a filler for her

 

(57) Abstract:

Composition and method applicable in the field of artificial decorative materials based on polymers. The composition comprises a transparent uncured polymer resin, additives target and filler particles dendritic form obtained from utverzhdenii polymer resin with targeted supplements. The ratio of the following components, wt.%: transparent uncured polymer resin 20-40; additives target 40-60; filler - the rest. In the manufacture of filler in stages utverjdayut mixture of the second polymeric resin with targeted supplements. First utverjdayut to the degree of elongation at break 300-350%, then crushed using a centrifugal mill with the speed of 1200-1400 rpm and finally utverjdayut with particle formation dendritic form. Achieves the improvement of the aesthetic qualities of artificial decorative material. 2 S. and 2 C.p. f-crystals, 5 Il.

The invention relates to the production of artificial decorative materials based on polymers that mimic natural stones such as granite, marble, etc. that can be used for interior decoration, as well as in different areas of the building.

Ia uncured resin and a filler (see, for example, the application of EPO N 0362884, CL 04 In 26/06).

A known method of manufacturing a filler for this composition providing a cured resin premixed with targeted supplements, and its subsequent fragmentation using a known means (see, for example, the application of EPO N 0362884, CL 04 In 26/06).

When using this method formed the filler particles multifaceted forms, the use of which in the composition cannot provide the desired aesthetic qualities of the stone, which limits the scope of its use.

Closest to the proposed composition solution (prototype) is a composition for the manufacture of decorative materials containing the first uncured polymer resin, additives target and filler (see, for example, U.S. patent N 4544584, CL 428-15).

Closest to the proposed method of manufacturing a filler (prototype) is a method, which consists in drying and crushing of the second polymer resin (see, for example, U.S. patent N 4544584, CL 428-15).

The method involves curing the second polymer resin with targeted supplements and its subsequent fragmentation using a high-speed centrifuge with teeth. In real composition.

A significant disadvantage of the known solution is that the faceted shape of the particles prevents their dense packing in the plane of the thin section (no "adjustment" of the edges of the particles to each other), and between particles remain large gaps, resulting in significantly reduced aesthetic quality of the stone, such as granite.

The aim of the invention is to improve the aesthetic qualities of artificial decorative material, in particular of the stone, mimicking the natural granite, marble, etc.

The invention in part of the composition is that the composition for the manufacture of decorative materials containing the first uncured polymer resin, additives target and filler from the second utverzhdenii polymer resin with targeted supplements, the filler comprises particles of dendritic form in the following ratio, wt. %: the first polymeric resin 20-40, targeted supplements 40-60, filler - rest.

Compared to the prototype (patent N 4544584) the invention contains new features, namely, that the filler comprises particles of dendritic form in the following ratio, wt.%: the first polymeric resin 20-40, targeted supplements 40-60, on the deposits of filler, which consists in drying and crushing the second polymeric resin with targeted supplements, the curing is carried out in stages, with the first of his produce to the degree of elongation at break 300-350%, then the polymer resin is crushed, and then finally her utverjdayut with particle formation dendritic form.

Compared to the prototype (patent N 4544584) the invention contains new matter, which consists in stage-by-stage curing the second polymer resin with targeted supplements, with the first of his produce to the degree of elongation at break 300-350%, then crushed, then finally her utverjdayut with particle formation dendritic form.

In Fig. 1-5 depict variations of the profile of the filler particles dendritic form.

Particles dendritic forms have round 1 and corner 2 parts, as well as deepening 3.

Composition for the manufacture of decorative materials contains the first uncured polymer resin, additives target and filler particles dendritic form obtained from the second polymer utverzhdenii resin with targeted supplements.

As the first polymer resin (20-40 wt.%) can be used any transparent resin. The most suitable is elastichnimi resins as satisfying the essential requirements, i.e., good transparency and weather resistance.

In the resin introduced various additives target (40-60 wt.%): hardeners, pigments, additives that affect the impact strength, flame retardants, UV absorbers, thixotropic agents, agents that accelerate the degassing of the mixture, antistatic agents, agents that reduce fouling and influencing the coefficient of friction of the surface.

Their choice is determined by the purpose and requirements for the appearance of manufactured decorative materials.

The filler is introduced into the composition in the form of particles dendritic form. It is this form of particles provides increased packing density in the plane of the thin section, provides a "mesh" edges of the particles for each other, simulating the penetration, eliminates the appearance of visible gaps between adjacent particles.

The degree of packing in a layer of such particles is 0,73-0,74, and for particles with straight faces - of 0.62-0.64 in, the angle of repose 42-44 and the 37orespectively.

As the second resin filler can be used any resin during curing which there is a pronounced stage of viscoelastic state, and this may be the same resin as the first, but mojiti epoxy resin, or the first resin may be epoxy resin, and the second apoximately.

Targeted supplements in the filler are, basically, pigments, but it can be hardeners, flame retardants and others.

The ratio of components is selected so as to obtain the desired packing of particles dendritic form. Deviations in the content of components will lead to the violation of the packaging due to changes in the degree of filling, resulting in deteriorating the similarity of the artificial stone with a natural sample.

The product on the basis of the described composition is produced in a known manner, i.e., curing of the mixture components in the form at room temperature.

A method of manufacturing a filler composition is as follows.

The second uncured polymer resin mixed with targeted supplements, cures in stages.

At the initial stage the mixture utverjdayut to achieve elongation at break 300-350% under conditions of uniaxial tension of a cylindrical sample with a diameter of 2.5 mm at a speed of stretching of 300 mm/min. and Then the workpiece is ground in a centrifugal mill with the speed of 1200-1400 rpm, after which produced the surface, with many speakers round 1 and bit the corner parts between 2 grooves 3.

It is the elongation of a mass in the range of 300-350% provides particle formation dendritic form.

At a higher elongation resin such particles are not formed, and is samolepnye particles. With less elongation of the formed particles are more angular shape with straight edges.

Crushing mass produced in a centrifugal mill with knives with cutting edges. This mill brands EKM, as well as the modified mill based on them. The rotation speed is 1200-1400 rpm, This speed helps to obtain particles dendritic form. Decreasing the rotation speed of the particles dendritic forms are not formed due to the slow stretching of the mass. When the speed increases, the mass behaves fragile due to too high speed stretching and the resulting particles have a straight face. Centrifugal mill is selected because it provides the specified speed. Other methods of crushing masses unsuitable, since the particles are dendritic forms could not. Final curing of the particles produced in modes, obespechivayushchaya, wt. %: the first epoxy resin with hardener 30, targeted supplements (trihydrate alumina) 50, filler 20.

For the manufacture of filler took a second resin, also epoxy, hardener, the trihydrate of alumina and mineral pigments. The content of the component masses for the manufacture of filler was as follows, wt.%: epoxy resin with hardener 30, the trihydrate of alumina 65, mineral pigments 5.

As mineral pigments used the iron oxide to obtain a red color, titanium dioxide for white, ochre - yellow-brown, soot for black, cadmium sulfide - orange color.

In the mixer periodic actions were consistently mixed resin, the hardener, the trihydrate of alumina, pigments. The mixture was distributed on a plastic pallet thickness 1.0-1.2 mm and spent the first curing to obtain the elongation at break of 310%. To this mixture was stirred at a temperature of 30oWith, the exposure time of 150 minutes In the first curing was obtained elastic sheet that is divided into pieces (cut with scissors or tear. The pieces have a size of approximately 2x2 see the resulting pieces were placed in a centrifugal melnitsami on a plastic tray and carried out the second stage of curing at a temperature of 45oWith over 60 minutes

Solidified powders had a pronounced dendritic form. The same form was the powders when the variation of all parameters of the process within the stated values. Then the powders were separated into fractions using the system screens.

To obtain a red granite in composition is injected with a mixture of fillers in the following colors: red, orange, yellow, brown, white, black. For more dense packing of the powder filler took various sizes from 0.3 to 1.5 mm of the Composition was poured into the form and utverjdali at a temperature of 65-70oC for 60 minutes In a red granite with a very high visual similarity with the natural sample - grained Karelian red granite. The same effect was obtained in the manufacture of granite for all the specified proportions of the components of the composition.

1. Composition for the manufacture of decorative materials containing polymer uncured transparent resin and a filler of polymer utverzhdenii resin with targeted supplements, characterized in that the filler comprises particles of dendritic forms at the following content, wt.%:

The uncured polymer is transparent is the, as polymer uncured transparent resin used resin type epoxy, acrylic, etc

3. The composition according to PP. 1 and 2, characterized in that the polymer utverzhdenii resin used epoxy or apoximately resin.

4. A method of manufacturing a filler, which consists in curing polymer resin with targeted supplements and subsequent crushing by centrifugal mill, characterized in that the first exercise cure to the degree of elongation at break of 300 to 350%, and the crushing is carried out at a rotation speed of 1200 - 1400 rpm, after which the resin is finally utverjdayut with particle formation dendritic form.

 

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