Composition based on emulsified resins, curable by ultraviolet radiation, and their use as a varnish for coating floors and walls

 

(57) Abstract:

The invention relates to compositions based on emulsified resins, curable by ultraviolet radiation, which includes: unmodified oligomers as the basis of composition, which determines the final properties of the cured product; curing agents consisting of polyfunctional monomers; photoinitiator initiating polymerization; additives to make the product special properties. The proposed composition differs in that it is a homogeneous stable emulsion, in which the weight percentage of water in a mixture of water and resin is from 5 to 35%. 8 C.p. f-crystals, 3 tables.

The subject of invention

The present invention relates to new compositions based emulsified resin type polyurethane, or other similar materials, UV curable by radiation, which if necessary can easily enter the desired additives and which is quite simple in operation.

The invention also concerns the use of these compositions - both in pure form and, more generally, in combination with additives as the layer of lacquer to improve properties such as wear-RES

Background of invention

Many of the flooring and the walls are paintings and tiles are produced using a variety of technologies, in particular, by applying to the surface of various materials, such as PVC or synthetic resin type of linoleum. These products usually put protective layers, in particular lacquer, with the aim of improving their operational properties.

This varnish should be transparent, so that it did not close the underlying decorative finish, resistant enough to prevent changes color over time, and possess high wear resistance and resistance to stains.

When it is applied usually get a very thin film, in order to ensure the preservation of relief drawing, which tend, as a rule, be performed on the finished product, in particular by chemical or mechanical granulation.

The varnish is usually injected additives or fillers that improve the appearance or properties of the product.

As such fillers, such as alumina, as a rule, high density, it is difficult to obtain and to maintain a homogeneous dispersion. Citadine fillers, even in the case of a thin lacquer layer, undesirable.

It was found that the use of resins, polyurethane type is particularly useful due to their inherent properties, in particular, due to their easy and fast curing UV radiation.

Curing UV radiation finds its application in areas such as coatings on plastics, wood and laminates, paper, metal, leather, textiles, etc.

In addition, it is often used in relation to paints and adhesive substances.

Compared with other methods of curing, UV curing has a number of advantages, among which we can mention better performance accounted for by the greater speed and less energy, compact equipment and more effective protection of the environment due to the refusal of the use of solvents or sharp reduction of their amounts, and their lower toxicity.

However, it should be borne in mind that the application of some of the resins is associated with certain difficulties, in particular in the case of the introduction of additives for mineral and similar fillers.

Obtaining a uniform and stable the second mass, consequently, with a high viscosity, which requires operation at high temperatures to reduce the viscosity.

Currently, typical lacquer composition based on resin type polyurethane, cured by UV-radiation, includes:

- oligomeric basis that determines the final properties of the cured varnish;

- monofunctional or polyfunctional monomers as reactive diluents and curing agents;

- photoinitiator that serve as initiators of curing;

- supplements to make the coating special properties.

As oligomers usually use polymers with a molecular weight of from 400 to 7000.

Low molecular weight oligomers are flowing liquids.

With high-molecular oligomers are difficult to operate at room temperature.

The viscosity of the oligomers varies at room temperature from 10,000 to 100,000 SDRs.

As a consequence, we have, as a rule, to resort to the use of monomers to reduce the viscosity of the final composition.

Another way is to use large amounts of solvents.

In these cases, in the ü, unlike oligomers, which are considered non-toxic, some of the monomers are classified and labeled, depending on existing regulations as hazardous products. For the same reasons you should avoid widespread use of solvents. In addition, the lack of monofunctional monomers is to substantially reduce the speed of curing and performance deterioration.

Therefore, it was proposed to use oligomers modified to make them hydrophilic properties, which can be combined with an aqueous medium.

This eliminates the presence of monomers in the composition to achieve a viscosity of about 100 PZ when the dry matter content of from 30 to 40%.

The main disadvantage of modified oligomers is their high cost and limited capabilities of their choice.

As for unmodified oligomers, suppliers are advised not to use water at all or to limit its content to a few percent.

The purpose of the invention

The aim of the invention is to eliminate the disadvantages of the technical solutions, the relevant prior art, the PA, curable by ultraviolet radiation, without the use of solvents or modified oligomers.

Features of the invention

The subject of the invention is a composition based emulsified resins, curable by ultraviolet radiation, including:

- unmodified oligomers as the basis of composition, which determines the final properties of the cured product;

- curing agents consisting of polyfunctional monomers;

- photoinitiator initiating polymerizatio;

- additives to make the product special properties, such as surface-active substances.

This composition differs in that it is a homogeneous stable emulsion in which the weight percentage of water in a mixture of water and resin is from 5 to 35%, preferably from 10 to 25%.

The term “resin” includes oligomers and the above curing agents.

The advantage of this technical solution is no need to use extremely volatile solvents and monofunctional monomers.

Through proper selection of the appropriate weight ratio of the water and resin in the above-mentioned limits.

When using the claimed composition as varnish for coating floors and walls with the use of traditional technologies, well-known practitioners, you can find the final viscosity of the composition depending on the needs of specific equipment with small amounts of suitable solvents.

If you are working with compositions consisting of 100% of the polyacrylic resins, faced with the difficulty of obtaining matte surfaces, the proposed compositions do not have this disadvantage, because they can easily enter matting fillers.

As a rule, in the proposed composition can easily enter numerous fillers of different nature.

In particular, the following matting agents, and agents, giving strength:

1. Matting agents:

- fine silica powder;

- fine matting agent;

- polyolefin wax;

- polyamide wax;

- wax PTFE (PTFE).

2. Agents, giving strength:

- quartz;

- silicon dioxide;

The above is applicable to matting agents, the content of which can vary from 0 to 10%, and fillers that give strength, and fillers to improve wear resistance, the content of which can vary from 0 to 30%. The above percentages represent weight content, expressed with respect to the resin.

Thanks to the good dispersive ability of the pigment fillers provided by selection of songs, you can optimize the content of the component without having the use of their excess in order to obtain the required number of additives on the surface of the coated product.

Even materials with a high density (for example, aluminum oxide, the density of which is about 4), only slightly deposited in such a composition, and then easily return in the emulsified state.

As no restrictive examples of the use of unmodified oligomers according to the invention include:

- urethaneacrylate;

- epoxyacrylate;

- complex preferablyat;

- simple preferablyat;

- siliconegel.

Values maskrider agents, can result:

- GUPTA (glycerylphosphorylcholine);

- HDDA (hexaniacinate);

- TPGDA (tripropyleneglycol);

- TMPTA (trimethylolpropane);

- PATIA (pentaerythrityl three - and tetraacrylate).

The percentage of monomer in the mixture of polyfunctional monomer with the unmodified oligomer is up to 35%.

As photoinitiators can be used:

- alpha hydroxyketone;

- alpha aminoketone;

- benzyldimethylamine;

- benzophenone.

These photoinitiator used in the usual proportions, defined by the nature of the applied polyfunctional oligomers and monomers.

As surfactants in the invention may be any surfactant that can emulsify the resin in water to obtain stable emulsions. Specialists in this field can easily find suitable surfactant. In particular, as a surfactant can be used FC430 3M, which is a fluorinated product, additionally, you can use products similar to BYK307 company BYK CHEMIE, which is the preferred method of implementation, illustrated using the following examples and the technological scheme for obtaining a floor covering (see tab.1-3).

Examples

The contents of the ingredients in table 1 represents the percentage weight content with respect to the resin, i.e., in units of concentration per 100 parts resin".

Method for making

1:

gradually add urethaneacrylate CN 965, trimethylol-proventricular SR 350, surfactant FC-430 and photoinitiator Darocure 1173, and then stirred using a unit DISPERMAT CV with a rotation speed of 1000 rpm for 10 min;

- gradually add water when the rotation speed of 4000 rpm for 15 minutes

2:

gradually add epoxyacrylate CN 104, trimethylol-proventricular SR 350, surfactant FC-430 and photoinitiator Darocure 1173, and then stirred using a unit DISPERMAT CV with a rotation speed of 1000 rpm for 10 min;

- gradually add water when the rotation speed of 4000 rpm for 15 minutes

3:

gradually add urethaneacrylate CN 965, trimethylol-proventricular SR 350, surfactant FC-430 and photoinitiated 10 min;

- gradually add the matting agent OK and Al2ABOUT3agent, giving strength, then homogenized at a speed of 2000 rpm for 10 min;

- gradually add water when the rotation speed of 4000 rpm for 15 minutes

4:

gradually add epoxyacrylate CN 104, trimethylol-proventricular SR 350, surfactant FC-430 and photoinitiator Darocure 1173, and then stirred using a unit DISPERMAT CV with a rotation speed of 1000 rpm for 10 min;

- gradually add the matting agent OK 412 and Al2ABOUT3agent, giving strength, then homogenized at a speed of 2000 rpm for 10 min;

- gradually add water when the rotation speed of 4000 rpm for 15 minutes

The compositions of examples 5-7 were prepared as compositions of examples 1-4, with the difference that the quality of the ingredients took other oligomers and in examples 6 and 7, another surfactant.

Table 3 summarizes the comparative properties, on the one hand, the technical solutions of the relevant prior art, and more particularly polyurethane with 100% dry matter content and water polyurethane 40% sod is

1. Composition based emulsified resins, curable by ultraviolet radiation, comprising oligomers as the basis of composition, which determines the final properties of the cured product; curing agents consisting of polyfunctional monomers; photoinitiator initiating polymerization; additives to make the product special properties, such as surface-active substances, characterized in that the oligomers are unmodified oligomers selected from the group consisting of urethaneacrylate, epoxyacrylate, complex preferability, simple preferability and silicongate incompatible with water, and the composition is a homogeneous stable emulsion, in which the weight percentage of water in a mixture of water and resin is from 5 to 35%.

2. The composition according to p. 1, characterized in that the weight percentage of water in a mixture of water and resin is from 10 to 25%.

3. Composition under item 1 or 2, characterized in that it contains additives.

4. The composition according to p. 3, characterized in that it contains a matting fillers, the weight content of which with respect to the resin is from 0 to 10%.

5. Composers who their durability, the weight content of which with respect to the resin is from 0 to 30%.

6. Composition according to any one of paragraphs.1-5, characterized in that the polyfunctional monomer acting as a curing agent selected from the group comprising one or more of the following compounds: glycerylphosphorylcholine; hexanediamine; tripropyleneglycol; trimethylolpropane; pentaerythritol three - and tetraacrylate.

7. Composition according to any one of paragraphs.1-6, characterized in that the weight percentage of monomer in the mixture of polyfunctional monomer and the unmodified oligomer is up to 35%.

8. Composition according to any one of paragraphs.1-7, characterized in that photoinitiator selected from the group comprising one or more of the following compounds: alpha-hydroxyketone; alpha aminoketone; benzyldimethylamine; benzophenone.

9. Composition according to any one of paragraphs.1-8 to create a layer of lacquer for coating floors and walls.

 

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