FI104184B - A method for producing paint - Google Patents

Description

"104184

METHOD FOR PREPARING PAINT

The invention relates to a method for producing paint.

B

In particular, though not exclusively, the process relates to the preparation of red mullet. For the sake of simplicity, the invention will be described below, although not limited to the preparation of red multifunction paint Viita-5.

Before describing the invention in more detail, it is appropriate to describe a conventional red-earth paint preparation.

For hundreds of years, red paint has been made using a similar manufacturing process. The scale of only 10 batches ranged from small soup cookers to manual factory scale soups. In recent years, a process-controlled plant has also been introduced.

The paint mainly consists of a color pigment (traditionally from the Falun Copper Mine), flour such as rye or wheat which acts as a swelling agent and gives the paint its thixotropy, iron wax, wetting agent and water. In the last decades, linseed oil has also been added to improve the adhesion of paint. In this case, linseed oil is the only actual binder in the paint :. they.

The production technology has always been the same, with different ingredients added with stirring and heating. The blowing agent, flour, is always added before or at the beginning of the heating step to prevent lumps from forming in the paint.

The traditional method of production is based on the blending of paint ingredients, whereby the shear rate of the blending motion is very low, so as not to damage the binding ability of the paint flour. This know-how has been passed on from one generation to the next by red gold manufacturers.

2,104,184

The relatively poor wetting of the red paint, and the consequent relatively low binding capacity, are issues that are not known to have been addressed.

Due to these properties, red coarse paint has been used with a reliable 5 result only on coarse v wood. Today's fast-growing wood and its smooth-faced lumber have caused increasing problems with the use of red mulch, especially for manufacturers whose manufacturing process is poorly controlled. One of the problems that arises is that the red mulch paint comes off the surface of the wood.

It is an object of the present invention to eliminate the above-mentioned problem as well as other problems by developing a process for producing a paint which provides high and uniform quality of paint which has good wetting and consequent adhesion to the substrate and other properties.

The invention thus relates to a process for the preparation of a paint by first preparing a trowel containing at least the majority of the above-mentioned materials except the swelling agent and containing only a portion of the water contained in the paint, such as about 20% or the like, using high shear rates and for a sufficient period of time to crush the particulate agglomerates present in the original particles, separately preparing a size containing swelling agent and a further portion of paint water, such as about 15% thereof, and heating a mixture consisting of and the remainder of the paint water, such as about 65% of it, at room temperature elevated temperature, such as, for example, a low shear rate of about 70 ° C, was used to add to the said mixture consisting of abrasive and water a low flow rate for a relatively long period of time, such as on the order of at least 10 min., and then warming the resulting paint batch to about 95 ° C and finally allowing it to cool.

The invention will be further described with reference to the following example: Example A. A batch or abrasive was prepared containing the following ingredients (kg):

Whiskey solution 4.8

Pigments 10.0 15 Wetting agent 0.2

Linseed oil 8.0

Water 12.0

Grinding batch total 45.0 20 Grinding batch is added to a container the size of which depends on the size of the trowel and the number of trowels (see figure). The trowel was machined using a trowel at high shear rates of about 18 to 25 m / s for about 10 minutes. In this case, it can be concluded that the shaking has reached a sufficient level of 25, that is, that the particulate agglomerates were crushed to the starting particles having a size below 120 µm.

4 104184 B. A meal size was prepared containing the following ingredients (kg):

Flour 6.0

Water 10.0 5 _

Total size 16.0

The flour and water were mixed using a low speed or low shear rate.

C. A final batch was prepared by mixing trowel A) and 10 meal size B) with water as follows (kg):

Rolling Lot A) 45.0

Flour sizes B) 16.0

Water 39.0 15 Finish Paint Total 100.0 The mixture of trowel A) and water was first heated to about 70 ° C and worked at a low speed, i.e. a low shear rate. Heating was stopped for 20 minutes and flour was added at low flow for a little over 10 minutes. Thereby uniform homogenization of the flour was obtained in the whole batch mixture. After the addition of the powder size lot, the finished paint was heated to 95 ° C and then allowed to cool.

The paint produced by the process of the invention has the following advantages over a conventionally prepared paint: - a significantly higher wetting capacity, which in turn means that the paint is less susceptible to malfunctions and is more suitable for today's timber and is also suitable for use on planed timber surfaces; 104184 5 - Better coverage, i.e. less paint is required to achieve a given coverage, resulting in better performance over cost; - a better bonding ability between the pigment and the binder, which results in a better durability of the painted facades; higher and smoother thixotropy, which in turn leads to better spreadability and better paint application capability, which in turn results in faster application.

10 The reasons for these feature improvements can be explained as follows:

The better wetting ability is obtained because the pigment agglomerates are crushed to the size of the original particles, whereby the binder is able to cover the individual particles instead of the agglomerates. This also results in a longer paint life, since the paint binder covers a substantially larger pigment surface.

The increased coverage is due to the wider pigment surface resulting from the crushing of the pigment agglomerates.

The higher and more uniform thixotropy, which results in better spreadability, is due to the fact that the flour is quickly heated to expand. Compared to conventional methods, the heating time is reduced by about 90%. Therefore, the flour is not subject to disintegration due to the long heating time.

The accompanying drawing schematically illustrates an exemplary embodiment of the present invention in an axial cross-section.

The drawing preferably shows a circular container 10 in which the abrasive plate 11 is rotatably mounted. Suitably, the trowel is driven by a motor 12 having a variable speed rotation and having a vertical axis 104184 6. The diameter D of the trowel 11 is empirically determined and proportional to the prevailing production. The diameter of the container 10 is suitably 2-3 times the diameter D of the trowel, and the trap 11 is preferably fitted at a height from the bottom of the container 10 which corresponds to a dimension of 0.5 to 1.0 times D. In each charge, the paint mixture is added to the container 10 suitably to a height corresponding to 1-2 times the D dimension. During use, as the trowel 11 rotates, a vortex is formed in the center of the container and the paint flows 10 in two vortex flow rings, one located above the trowel 11 and the other below the disc as shown in the figure.

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Claims (1)

A process for the preparation of a paint, in particular red earth, wherein the red earth paint comprises a pigment, an expanding flour, a wetting agent and water and, normally, an iron whisker and preferably a binder such as linseed oil, characterized in that the aforesaid materials except for the blowing agent and containing only a portion of the water contained in paint 10, such as about 20% of that which is rubbed with a trowel or the like at high shear rates and for a sufficient period of time to crush the particulate agglomerates into the original particles; which contains a swelling agent and a further portion of the paint water, such as about 15% thereof, and that a mixture consisting of a trowel and a the remainder of the water, such as about 65% of it, at room temperature compared to an elevated temperature, such as about 70 ° C, using a low shear rate, adding to said mixture of trowel and water at a low flow of "25 and relatively long for a period of at least 10 minutes, and then the resulting paint batch is heated to about 95 ° C and finally allowed to cool. 104 184 Förfaringssätt at färgtillverkning, specielllt the manufacturing of Rödfärg, inneällande färgpigment, säsom svällmedel tjänande mjöl, vätmedel and water, ävensom normally ocksä järnvitriol Science förträdesvis a bindemedel, 5 säsom linolja, characterized in that the plan is first bereder I rivsats containing glasses At least the plurality of the above-mentioned beständsdelar , med undantag av svällmedlet, samt innehällande about en del av det i färgen ingäende vattnet, säsom t.ex. i storleksordningen 10 20% dear, waving rivsats medelst en rivskiva eller liknande bearbetas med höga skjuvhastigheter samt under tillräcklig tid sönderdelning av förekommande particle agglomeration account primary particlear, att man separat bereder en redning , säsom i storleksordningen ca. 15% därav, och att man Värmer en blandning av rivsatsen och resterande del av det i färgen ingäende vattnet, säsom av storleksordningen ca. 65% därav, account en jämfört med • 20 rumstemperatur förhöjd tempur, säsom t.ex. account ca. 70 ° C under slurry skjuvhastighet, att man till blandning av rivsatsen och vattnet med ringa flöde och under tämligen slant, sommom av storleksordningen minst 10 min. 95 ° C and slutligen warm att light.