DD216476A1 - COLORED WOOD PROTECTIVE PAINTINGS - Google Patents

Abstract

The invention relates to fungicidal and insecticidal Holzschuetzende paints. They are particularly suitable for the protection of wood built in the open air and can be processed by brushing, spraying and dipping. The object of the invention is to provide a wood preserving paint on an exclusive tar basis without further additives. This is achieved by using pyrolysis tar and coal tareroel as input products, the proportions of which can be alternately varied between 10% and 90% in accordance with the desired color tones.

Description

Title of the invention

Colored wood-protective paints

Field of application of the invention

Me invention relates to fungicidal and insecticidal extensively effective wood-protective paints, especially for the protection of wood used outdoors, wood materials and Holzkombinationswerkstöffen against all biological and weather-related damage factors that give the treated wood at the same time a decorative appealing color with highlighting the wood grain, and a good dry paint layer and can be applied by brushing, spraying and dipping.

Characteristic of the known technical solutions

Are known wood preserving paints based on tar under the collective term Karbolineum, which generally consist of brown or with dyes or pitch brown-colored high-boiling crude tar oils, which ensure protection of the wood from being destroyed by fungi and insects and have a water-repellent effect ·

In order to increase the quality, sometimes complex substance mixtures have been proposed, for which there are no raw material requirements today.

* · 'As a biocidal main component are preferably used heavy coal tar oils, which have a good depth effect with a long-lasting protective effect, too

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under weather conditions, connect. However, the paint quality is bound to certain constitutional requirements of coal tar oils, which is not met by the recognized as a wood preservative coal tar oil, as it is designed specifically for Kessel pressure impregnation and especially for a decorative wood coloring insufficient · Furthermore, pure coal tar oils tend to rapid graying weather-exposed wood, so that they can be used only by the addition of dyes or pitch as colored paints. They tend to sweat out under sunlight and persistently are not smudge-proof.

It is also known that pyrolysis tares from the ethylene production have distinct fungicidal properties against wood-destroying fungi, which, however, do not achieve the effectiveness of the coal tar oils. For this they have a constant natural color compared to coal tar oil, the wood surfaces colors much more decorative and achieve a favorable drying-hardening process on wood. It is in the seizure products of Pyrolyseteere to viscous products that are not suitable without diluents as wood preserving paints.

Object of the invention

The aim of the invention is to develop on the basis accumulating tar oil and tar products without further additives, in particular of solvents, dyes or pigments and specific biocides, colored wood-protective paints with Laschararakteristik that meet the increased demands on the utility properties of this wood preservative group ,

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Explanation of the essence of the invention

The object of the invention is to provide a wood-based paint on an exclusive tar basis, which provides comprehensive protection of the wood against biotic and abiotic pollutants, gives the wood a decorative color in Laschararakteristik and results in a drying-curing process a relatively smear-resistant paint film.

According to the invention the object is achieved by a paint consisting of a Geraisch of

10 to 90 # coal tar oil and

90 to 10 Io Pyrolyseteer exists.

The quality parameters of the input products are: Coal tar oil

Distillation 210 85% by volume must be stated 1.04 - at least 200 1. 5 VoI % ⁰ C min. 230 Density g / cm ³ 20.0 at least 48, 20 by volume & C ⁰ min. Clearing point ⁰ C highest. mind.3,0 1. acidic substance. $ Vol. Toluene insoluble S highest at least 80 pyrolysis tar at least 8, Start of boiling ⁰ C Max. 0 Pechgehog, to 300 ⁰ C <$> maximum. 1. 0 Density b.20 ° C g / cm ³ 05 Flash point ⁰ C Verkokungsriickstand 0 ash% 1 Toluene insoluble ^c h 0

- 1.15

The wood-protective paints according to the invention have some advantages over conventional wood-protection glazes.

The coloring is realized by the intrinsic color of the raw materials, it eliminates the addition of pigments, during storage and processing, there are Iceine settling problems ·

Since the biocidal performance is fully provided by the raw materials themselves, there is no need to add specific biocides, thus eliminating solubility and duration problems.

The lack of additional binders or film formers does not cause any problems of delamination of paint layers. The consistency is adjusted by blending the raw materials in the ranges required for brushing, spraying and dipping. Therefore, no additional solvents are required. The particular advantages of the wood-protective paints according to the invention are in the above-average bond depth, which is an essential requirement for the duration of action of the paints, in the ease of repair, since subsequent coatings without any pretreatment of the wood surface can be done at any time intervals and in the Kostengiinstigkeit · Compared with conventional Karbolineen are the advantages that no loss in biocidal power \ capacity and penetration, without further additions, simply by varying the mixing ratios, improved color in various shades is achieved, which is characterized by high transparency and Parbintensität under uplift of the wood grain, the surface texture by fast drying,

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pronounced layer formation is improved and the inevitable parabolic aging in natural weathering does not lead to a graying of the wood, but rather to gradual, stable brown shades · cost-effectiveness, ease of repair and storage stability facilitate re-painting, which then leads back to the original color deepening «

Exemplary embodiments Example 1

60 parts by weight of coal tar ^! and 40 parts by weight of pyrolysis tar are mixed in a container with torpedo stirrer.

The result is the color "cedar brown ^11. The following quality characteristics apply:

Density b. 2O ⁰ C g / cm ³ 1.05 - 1.15

Start of boiling ⁰ C at least 200

Distillation

25.-Vol .- * ⁰ C at least 225

50 vol.-46 ⁰ C at least 250

Clearing point ⁰ C highest. 20

Vol. 4 water highest. 0.5

acidic ingredients

Vol. ^ S at least 2.0

Engler viscosity ⁰ E

at 2O ⁰ C at least 2.0

at 5O ⁰ C at least 1.0

Flash point ⁰ C at least 80

¹ - 6 -

Example 2

By mixing coal tar and pyrolysis tar

in the percentage ratio 75: 25 one receives the colored tar oil "nut brown" with the following guaranteed quality characteristics:

Density b. 20 ⁰ C g / em ³ 1.05 - 1.15

Initial boiling point ⁰ C at least 200 boiling gradient ^

25 vol. 4 ⁰ G min. 225

50 vol. · 4> ⁰ G at least 260 ·

Clear point ⁰ G highest · 25 '

Water Vol. -4> highest. 0.5 acidic ingredients

- # min. 2.0

Sniper viscosity ⁰ E

at 20 ⁰ G mind, 2.0

at 50 ⁰ C at least 1, 0

Flash point ⁰ G at least 80

Example 3

Test specimens of pine sapwood and spruce wood

3 '

Dimensions 50 × 25 × 15 mm were immersed in 1 to 3 stages per 10 seconds in the ready-paint according to Example 1 and after a Zwiesheηlagerung of 4 weeks without stress and after 6 months of outdoor exposure to the attack of wood-destroying fungus. Coniophora puteana exposed in collaeulas for over 3 months. The mass losses of the test specimens compiled in Table 1 were found as a measure of the fungus attack, which showed that pine wood was already present at

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one-time treatment because of the higher intake and spruce wood are twice slashed when treated twice against destruction by fungi. The test with stress underlines the very good duration of action of the coating, since a safe visual effect is already given with 2 treatments under practice-relevant conditions.

Table 1

test substance Species diving av. Mass losses # With stages Aufn.- without Be masses bean , SpruchG. SpruchG 21.5 untreated Pine- - 22.9 cotter pyrolysis tar Pine- 19.9 50 Io cotter 1 χ 141 9.0 18.8 Erkosol 50 & 2 χ 201 3.3 13.8 3 x 260 1.6 pyrolysis tar Pine- 7.0 40 % cotter 1 χ 164 2.5 1.6 coal 2 χ 260 1.1 0 tar oil 60 % 3 x 303 0.4 Fichte 1 χ 115 3.1 2 χ 158 1.0 3 x 208 0.4

The absorption masses are a measure of the practical consumption masses in a dip treatment.

Example 4

The ready-to-use paints according to Example 1 were

in 3 coats on test panels made of spruce wood from

2 0,5 x 1 m spread over and after 20 days vertical in both south and in Uordrichtung in a double test wall of the Ire! Weathering according to the practice conditions exposed · In sunny weather, the paintings were already after 1 day dry and no longer sticky «

After a period of observation of 7 months, the decorative appearance did not change significantly.

In Anstriehverfahreη on spruce wood effort-

in the first coat of about 90 g / m, with 2

• 2 stroked about 130 g / in and after 3 coats round

2 170 g / m achieved as a practical value. On pine wood with average heartwood content

2, a coating weight of about 300 g / m is achieved in 3 coats.

example 5

The ready-to-use paint according to Example 1 was in

2

an application mass of 250 g / m on the planed surface of the test specimens of pine sapwood and after 14 days of storage at room temperature on cross sections visible through the intrinsic color penetration depth determined with a mean of 4.1 mm · On comparison test bodies of the same origin of wood with uniform annual ring course to the paint surface Conventional binder-containing wood protection coatings achieved penetration depths of 2.7 to 3.8 mm ·

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Example 6

The ready-to-use paint according to Example 1 was applied to test pieces of pine sapwood of dimensions 0.5 × 2.5 × 10 cm using different application techniques according to Table 2.

After an intermediate storage period of 4 weeks in the laboratory, the test specimens were stored in water with increasing duration and the water absorption determined by weighing and then determines the rate of delivery of the recorded water absorption masses by further weighing

 The results are summarized in Table 2.

Table 2

Ready-to-use paint Water absorption in Io compared to untreated test specimens

Application technology effort ^ _- ^;

mass Storage time in hours g / m ² 0 * 2 $ 0,5 1 2 4 5 6 8 24

2 hours 202 16 19 25 32 42 -47 51 67 stored

1 χ 10 seconds

long dipped 104 20 23 27 35 43 - 50 54 71

2x10 seconds

long dipped 143 24 27 30 37 47 -52 57 72

3x10 seconds

long dived 179 17 20 27 33 43 - 48 53 68

Wood protection glaze HIEO

3 x 10 seconds

long dipped 183 18 24 28 36 44 - 50 52 59

Thus, the paints according to the invention achieve a hydrophobing effect which is equivalent to the performance of conventional wood preserving varnishes. It is particularly favorable to observe the rapid release of the absorbed water during the re-drying, which is characterized by a value of almost uniformly 6 hours

Achievement of a residual water content of 60 g / m, corresponding to a wood moisture u »18 #, with previous 24-hour water retention is characterized. This value is more favorable than with all known wood protection glazes, which indicates a particularly high level of breathability, which counteracts the slow increase in wood moisture in changeable weather known for wood coatings.

Claims (1)

invention claim Colored wood-protective paints, characterized in that as by-products pyrolysis tar and
Coal tar oil can be used, wherein the proportions of Pyrolyseteer and coal tar oil can mutually vary according to the desired shades between 10 Io and 90 % .