NL1018235C2 - Silicone- and wax-free water-based composition for cleaning and hardening paint coatings comprises a film-forming polymer, a dispersant and a water-soluble cleaning agent - Google Patents

Abstract

Silicone- and wax-free water-based composition for cleaning and hardening paint coatings has a pH of 5-9 and comprises a film-forming polymer, a dispersant and a water-soluble cleaning agent. Independent claims are also included for: (1) (1) a method for cleaning and hardening paint coatings, comprising applying the above composition and drying it so that it adheres to the paint coating; (2) (2) a paint coating on which the above composition has been applied and adheres.

Description

Short indication: Cleaning and protection agent for paint layers.

The invention relates to a silicone-free and wax-free water-based composition for simultaneously cleaning and protecting and thus making existing paint layers sustainable.

Paint layers, in particular when exposed to the outside environment, get soiled over time, without the paint itself being affected. This particularly concerns paint layers applied to frames, in particular wooden frames, cladding, gutters, doors, etc. Cleaning agents for paint layers are known, but these often contain silicones and / or wax-like products. Furthermore, organic solvents are often used in such cleaning agents. For example, US 391 41 97 describes a protection composition in which an organic solvent and mineral oil are included.

The drawback of such cleaning agents lies in the fact that paint layers treated with them are difficult to paint over due to the presence of silicones and waxy products. To reapply a layer of paint treated with such a cleaning agent, the relevant protective layer must first be removed, which often requires organic solvents, which is labor-intensive and is harmful to the environment. The invention provides a water-based silicone and wax-free composition for simultaneously cleaning and preserving existing paint layers and adhering thereto, at least comprising - a film-forming polymer, - a dispersing agent, - a water-soluble cleaning agent, wherein the pH of the composition is 5-9.

By "water-based" it is meant that the composition is an aqueous solution or a suspension in which substantially no organic solvents are included. The composition is preferably free of organic solvents, although a low content of, for example, 5-6 w / w%, but a maximum of 10 w / w% is possible.

1018235 «- 2-

The composition according to the invention can be applied directly to a contaminated paint layer, whereby the paint layer is cleaned and again has a fresh appearance because the film-forming polymer provides a new protective layer, the paint layer acquiring the appearance of a newly applied paint layer. Because the agent according to the invention is in the neutral pH range, it is not harmful to, for example, glass, rubber, sealant edges, etc., so that the composition according to the invention does not have to be accurately applied to only the paint layer. Adjacent material that is not provided with a coating can also be brought into contact with the composition according to the invention without adverse effects. The composition according to the invention is particularly suitable for treating paint layers of one-component acrylate and alkyd resins, which is generally used for the woodwork of buildings. However, the use of the composition according to the invention is not limited to paint layers of the above-mentioned paints; the composition can also be used for treating paint layers of multi-component slags, such as car paints, as well as for latex paints.

The protective layer applied with the aid of the composition according to the invention is moisture-permeable and dirt and water-repellent, as a result of which water penetrates into the lacquer layer and the painted material, for example wood, whereby the evaporation of the water from the material through the protective layer 25 remains possible. This property is particularly advantageous when a moisture-permeable paint is also used.

One of the advantages of the use of the composition according to the invention lies in the fact that the paint layers retain an attractive appearance for longer and become less contaminated, whereby the renewed application of a paint layer can be postponed, which results in large cost savings in the maintenance of the paint layer. paint coats.

The composition according to the invention can be applied to the paint layer 35 in a simple manner with the aid of, for example, a sponge or by spraying. After drying for usually 1 to 2 hours, the paint layer is provided with an excellent adhesive polymer layer which gives the paint layer an attractive new appearance.

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The film-forming polymer in the composition according to the invention is preferably selected from the group consisting of acrylate copolymers, styrene copolymers, polyvinyl acetate or a mixture of at least two of them.

It has been found that by using such (co) polymers a protective layer is applied to the paint layer which adheres excellently to the paint layer and gives the paint layer a glossy appearance, whereby the paint layer thus treated can hardly be distinguished from a new paint layer.

The dispersant is preferably selected from the group consisting of ethyl glycol esters and butyl glycol esters or a combination thereof. Due to the good dispersing capacity, butyl glycol esters, in particular butyl monoglycol, are particularly preferred.

Any water-soluble cleaning agent known in the art is per se known to remove the paint layer from dirt, whereby a clean and clear paint layer is obtained suitable for inclusion in the composition according to the invention. The cleaning agent must not substantially attack or degrade the paint layer and is preferably easily miscible in the composition according to the invention. The person skilled in the art is able to choose such a suitable cleaning agent.

The water-soluble cleaning agent which is included in the composition according to the invention can thus for instance be a soap, but preferably the cleaning agent is selected from the group consisting of inorganic salts and inorganic hydroxides or a combination of at least two of them.

Particular preference is given to alkali hydroxides, alkali salts, ammonium hydroxide and ammonium salts, with the hydroxides in question, in particular potassium hydroxide, being most preferred.

It has been found that potassium hydroxide has excellent cleaning properties, the paint layer being substantially unaffected. Furthermore, potassium hydroxide is easily miscible in the composition according to the invention, and a stable composition is obtained which has a long shelf life.

The composition according to the invention comprises in particular: 15-75 w / w% water 6-30 w / w% film-forming polymer 1-5.5 w / w% dispersant 0.05-0.5 w / w% in water soluble cleaning agent.

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In an attractive embodiment, the composition according to the invention further comprises one or more of the following components: anti-foaming agents, preferably 0.15-1.0 w / w%, 5 stabilizers, preferably 0.4-3.0 w / w%, preservatives, preferably 0.01-1.0 w / w%, -pH adjusting agents, preferably 0.05-0.5 w / w%, surfactants, preferably 0.1 -0.8 w / w%, plasticizers, preferably 0.05-0.5 w / w%.

Anti-foaming agents are included to prevent foaming when applying the composition to paint layers, with which an even layer can be obtained upon application, without the formation of bubbles caused by air bubbles. A person skilled in the art is perfectly capable of choosing a known suitable antifoaming agent.

15 Attractive examples are, for example, SAG-10 (van Meeuwen,

Netherlands) and Dehydran 1293 (Henkel, Germany).

Stabilizers are included in the composition to stabilize the emulsion, to prevent settling of the components in the water, thereby ensuring an extended shelf life of the composition and a reduced need for shaking before use.

Suitable stabilizers are known in the art, such as polyurethane compounds (an attractive example of this is Ser AD FX 1010 Servo B.V., the Netherlands) and methylcellulose (an attractive example of this is Bermocoll E320 FQ, ICH,

The Netherlands).

Preservatives, in particular antimicrobials, are included in the composition according to the invention to prevent the growth of microorganisms such as, for example, bacteria and fungi and contamination caused thereby on the composition once applied to the paint layer. Suitable preservatives are known per se in the art. Attractive examples are Preventol D7 (Bayer, Germany), Metatin 55-31 (Achima AG, Switzerland), Parnatol XD40 (Schülke & Mayer, Germany) 35 and similar means.

pH-adjusting agents are used in the composition according to the invention to obtain the desired pH between 5 and 9. To this end, all means known to those skilled in the art can be used, including, for example, ammonia or AMP (Intergrated 1018235).

Chemicals Netherlands). Preferably the pH adjusting agent comprises ammonia. The use of ammonia also has the advantage that ammonia also acts as a disinfectant. By incorporating ammonia, it is thus possible to adjust both the pH and to impart degreasing properties to the composition.

The composition according to the invention preferably comprises surfactants to prevent drop formation of the composition when applied to a paint layer. Examples of suitable surfactants are known in the art.

Attractive examples are Surfinol 104F (Air Products, USA), Fluorad FC 129 (3M, USA) and similar means.

The surfactants are preferably non-ionic It has been found that with non-ionic surfactants, drop formation is optimally prevented; furthermore, such substances are highly compatible with the other components of the composition according to the invention. In this regard, alkyl sulfates are preferred, with C 1 -C 4 alkyl sulfates being most preferred.

Preferably, 20 plasticizers are included in the composition of the invention to impart additional elasticity to the film formed with the composition. Particularly preferred plasticizers are fatty acids with a carbon chain of 15 carbon atoms or more.

The composition according to the invention preferably contains glycol esters (butyl glycol, butydiglycol, Texanol, Dowanol), acrylate copolymer emulsion and / or PVAC (polyvinyl acetates), ammonia, anti-foaming agents, thickeners, preservatives, potassium hydroxide, alkali salts, high-quality fatty acids, non-ionic surfactants alkyl sulphate), emulsifiers. In a very attractive embodiment the composition according to the invention comprises at least: 67% by weight of water, at least 25% by weight of acrylate copolymer emulsion (100% by volume) of binder can also be supplied in 50% solution (water) of at least 0 75 wt% antifoam at least 0.4 wt% potassium hydroxide at least 0.07 wt% preservative (Parmatol XD40) at least 2.08 wt% thickener (SerAd FX1010) at least 0.35 wt% ammonia At least 0.6% by weight of non-ionic surfactants (alkyl sulfates) at least 0.35% by weight of alkali salts of high-quality fatty acids at least 4.26% by weight of glycol esters.

In another attractive embodiment, the composition according to the invention comprises at least: 15-75% by weight of water, at least 6-30% by weight of acrylate copolymer emulsion (100%) at least 0.15-0.9% by weight of antifoam 10 at least 0.08-0.06% by weight of potassium hydroxide at least 0.01-1.0% by weight of preservative at least 0.4-2.75% by weight of thickener at least 0.09-0.4% by weight % ammonia at least 0.1 -0.75% non-ionic surfactants (cell alkyl sulfates) at least 0.09-0.4% by weight alkali salts with high-quality fatty acids at least 1.0 -5.5 wt.% glycol esters Emulsifiers can also be included in the composition according to the invention. When soft water, i.e. with a hardness of 6-7 according to DIN, is used in the composition, it is sufficient to add a very low level of emulsifiers or to leave the emulsifiers absent from the composition. At a higher hardness of the water, in particular above 8.5, it is preferable to include one or more emulsifiers in the composition. Examples of proper emulsifiers are known in the art, such as Calgonit (Henkel, Germany) or Calgon N (Biesterfeld, the Netherlands). Depending on the water hardness, the emulsifier content is preferably 0-5 w / w%.

The composition according to the invention can be manufactured and stored as a concentrate and diluted before use with the correct amount of water, for which tap water, for example, is suitable. The composition according to the invention can, for example, be concentrated up to five times. A concentration of three times (that is, one part of concentrate can be diluted with three parts of water) is preferred.

The invention further comprises a method for simultaneously cleaning and preserving existing paint layers, comprising applying a composition according to any of the preceding TG1823S to the paint layer to cause it to adhere. The composition can be sprayed onto a layer of paint or, for example, with a sponge or cloth moistened with the composition. When spraying, a sponge or cloth can be used for example. The agent is preferably applied under dry conditions, because the still-dried composition can be rinsed off of the paint layer by, for example, rain or otherwise splashing water. Once dried, which usually takes 1 to 2 hours, the composition forms a film which, by choosing suitable film-forming polymers, as indicated above, can have a glossy character and which has an excellent adhesion to old intact paint layers. There are also various substrates on which the composition according to the invention can be applied, such as for example wood, plastics, natural stone, non-ferrous metals, etc.

It has been found that when applying the composition according to the invention to exterior paintwork, the maintenance work on this paintwork in the form of the application of an additional layer of paint by a person skilled in the art can be postponed considerably. This also makes a positive contribution to the environment, because less paint and therefore less solvent and / or environmentally harmful pigment substances will be used over time. Since applying the composition according to the invention with a sprayer, sponge or cloth is much less labor-intensive, faster and considerably simpler than applying a new layer of paint, it is much cheaper and can be carried out by lower-skilled personnel; This has very large financial benefits, especially with regard to planned maintenance.

With heavily contaminated layers of paint, it may be preferable to pre-rinse the layers of paint with water or with a cleaning agent suitable for this purpose and known per se, in particular for coarse contamination such as, for example, sand, and deposits of, for example, moss, algae and carbon / exhaust gases at least partially.

The invention furthermore relates to a layer of paint on which the composition according to the invention is applied and which adheres to it. As explained above, such a paint layer and the material on which the paint layer is applied are additionally protected, so that maintenance of the paint layer can be postponed and the paint layer retains a fresh appearance for a long time. In particular older layers of intact paint, i.e. older than 4 years, in particular older than 6 years, the above-mentioned result is remarkable.

The invention will be explained in more detail below with reference to an example.

5 Example

The following composition according to the invention was prepared by incorporating the aforementioned components in water: 52.05% by weight of neocrylic SC90 (45% by weight in water) 4.26% by weight of glycol esters (Tescunol) 10.35% by weight ammonia 0.74% by weight antifoam 2.08% by weight of thickener SerAd FX1010 0.07% by weight of preservative Parmatol XD40 0.40% by weight of potassium hydroxide 39.10% by weight of hydrogen 0.6% by weight of alkyl sulfate 0, 35 wt% alkali salts of higher fatty acids

Product is now a concentrate and can be diluted to a maximum of water from 1 (concentrate) to 3 (water).

20 Product is UV resistant, good outdoor durability for at least 1 year.

Adheres excellently to painted wood and revives the faded colors (especially dark colors) to almost the original color.

T018235 ·

Claims (9)

A water-free silicone-free and wax-free composition for simultaneously cleaning and preserving existing paint layers and adhering to them, at least comprising: - a film-forming polymer, - a dispersing agent, - a water-soluble cleaning agent, the pH of the composition 5 -9. 10 The composition of claim 1, wherein the film-forming polymer is selected from the group consisting of acrylate copolymers, styrene copolymers, polyvinyl acetate or a mixture of at least two of them. 15 A composition according to claim 1 or 2, wherein the dispersing agent is selected from the group consisting of ethyl glycol esters and butyl glycol esters or a combination thereof. A composition according to any one of the preceding claims, wherein the water-soluble cleaning agent is selected from the group consisting of inorganic salts and inorganic hydroxides or a combination of at least two of them. The composition of any one of the preceding claims, wherein the water-soluble cleaning agent comprises potassium hydroxide. 6. Composition as claimed in any of the foregoing claims, comprising: 15-75 w / w * water 6-30 w / w% film-forming polymer 1-5.5 w / w% dispersant 0.05-0.5 w / w % water-soluble cleaning agent. Composition according to any of the preceding claims, wherein the composition further comprises one or more of the following components: anti-foaming agents, preferably 0.15-1.0 w / w%, stabilizers , preferably 0.4-3.0 w / w%, preservatives, preferably 0.01-1.0 w / w%, 5 -ph setting agents, preferably 0.05-0.5 w / w %, surfactants, preferably 0.1-0.8 w / w%, plasticizers, preferably 0.05-0.5 w / w%. 8. Method for simultaneously cleaning and preserving an existing paint layer, comprising applying a composition according to any one of the preceding claims to the paint layer and drying it to adhere it. 9. A paint layer on which the composition according to any one of claims 1-7 is applied and which adheres to it.