RU2363716C1 - Moisture-resistant combined drying oil - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention is related to paint-and-varnish industry and may be used for dilution of oil paints, for impregnation of wood, plastering of concrete prior to painting. Moisture-resistant combined drying oil contains the following components, wt %: oil polymer drying oil, which represents 60% solution in kerosene fraction of oil polymer resins with softening temperature of 72-90°C - 54, oxidised mixture of vegetable oil that contains 3-10% of paraffin with viscosity of 4 400-1100 sec. -20 by VZ-4, oil solvent S4 - 150-200°C -20, siccative - 6.

EFFECT: improved moisture resistance of paint-and-varnish coat.

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Description

The invention relates to paints and varnishes for household chemicals and can be used for the cultivation of thick oil paints, as well as for coating wood, plaster, concrete before painting them with oil paints. Paints prepared using moisture resistant drying oils are intended for painting work indoors and outdoors.

The starting materials for the production of drying oil are film-forming substances, solvents and diluents, plasticizers, paraffins and desiccants.

The basis of drying oil are vegetable oils, paraffins and oil-based drying oil.

Known film-forming composition for the production of drying oil (RF patent No. 2265635, C09D 191/00, 2005.12.10), including oxidized sunflower oil, a synthetic resin and an organic solvent, in which the sunflower oil oxidized in the presence of triethylaluminum at 130 is used as the oxidized sunflower oil ° C, and as a synthetic resin, “green oil” thermally treated at 50-150 ° C for 3 hours is used, which is a by-product of the hydrogenation stage of the ethane-ethylene fraction of the ethylene production unit . and propylene with an iodine number 206,5-218,7 g I _2/100 g at the following component ratio, wt%:

Oxidized sunflower oil 10-30 Thermally treated "green oil" 20-40 Solvent fifty

Known film-forming composition for producing drying oil (RF patent No. 2266938, C09D 191/00, 2005.12.27), including sunflower oil, desiccant, an organic solvent and a synthetic resin, in which heat-treated at 50-150 ° C is used as a synthetic resin for 3 hours "green oil", which is a byproduct of the hydrogenation step ethan-fraction of an ethylene plant producing ethylene and propylene, having an iodine value 206,5-218,7 g I _2/100 g at the following component ratio, wt.%:

Sunflower oil 10-25 Heat treated "green oil" 25-40 Desiccant 0.27 Organic solvent 49.73

Also known is a drying oil based on low-viscosity oxidizing oils of sunflower oil (RF patent No. 2166523, C09D 191/00, 2001.05.10), in which, as a film-forming substance, oxidized sunflower oil with a viscosity of 33-58 s according to a VZ-4 viscometer (20 ° C) is contained. and as a desiccant - cobalt-barium salts of acids of sunflower oil in a mass ratio of 6.66: 1 in the form of a 30% solution in prepared sunflower oil, introduced in an amount of 0.8-2.3 wt.% of the total drying oil and soluble in film-forming at 60-70 ° C.

A common disadvantage of analogues is the lack of hydrophobic properties.

The closest in technical essence and the achieved result to the claimed one is oxo-combined drying oil (RF patent No. 2058358, C09D 191/00, C09D 157/02, 04/20/1996), which contains the following components:

- rapeseed oil oxidized, 50% solution in nephras C4 150-200 ° C 40% (TU 38.301 04-24-93) - oil-based linseed oil 54% (TU 6-10-1456-85) - driers: lead 2.4 (TU 11570-83) manganese 3.6

The disadvantage of the closest analogue is that it cracks on the surface of the product over time, and atmospheric moisture gets under the paintwork, while the tree swells, increases in volume and contributes to the further destruction of the paintwork of the product. Brick, concrete and plaster are also destroyed, which limits the functionality of using drying oils.

The objective of the invention is to expand the functionality of drying oil by introducing paraffin, which has hydrophobic properties and increases the moisture resistance of the paint coating, penetrating the surface of the product, protects against moisture, swelling and destruction.

The task is achieved in that the combined drying oil, including oil polymer drying oil, which is a 60% solution in the kerosene fraction of oil polymer resins with a softening temperature of 72-90 ° C, and desiccant, in contrast to the prototype, contains an oxidized mixture of vegetable oil with paraffin with viscosity on a B3-4 viscometer 400-1100 sec at a temperature of 20 ± 0.5 ° C in the form of a 50% solution in a solvent nephras C4 150-200 ° C in the following ratio of components, wt.%:

Oil Polymer Drying Oil 54 Oxidized mixture of vegetable oil with paraffin (paraffin 3-10%) twenty Solvent nefras C4 twenty Desiccant 6

Rapeseed oil was oxidized in a mixture with paraffin at a temperature of 120 ° C and an air flow rate of 1-2 m ³ per minute per 1 ton to a predetermined conditional viscosity with a B3-4 viscometer. The amount of paraffin was 3-10% per oil.

Then a solution of a mixture of oxidized oil and paraffin 1: 1 in a solvent Nefras C4 150-200 ° C was made and experimental samples of drying oil were prepared.

Table 1 Indicators of drying oil No. p / p The name of indicators Norm The paraffin content in the mixture with rapeseed oil, wt.% 3 5 8 10 one. Color of iodine scale mg J _2/100 cm3, which is darker than 700 250 250 220 220 2. Conditional viscosity on the B3-4 viscometer with a nozzle diameter of 4 mm at 20 ± 0.5 ° C, sec. 15-25 19,4 18.6 19.0 19.0 3. Acid number, mg KOH / g, not more than 8 5.77 6.3 6.5 6.8 four. Mass fraction of nonvolatile substances,% 55 ± 2 54,2 53.5 53.0 53.5 5. Volume fraction of sludge,% no more one 0 0 0 0 6. Transparency complete complete complete complete complete 7. Flash point in a closed crucible, ° С not lower 33 33 38 38 8. Drying time to degree 3 at 20 ± 2 ° С, hours no more 24 21 22 23 24

In addition, tests were carried out on wood with a size of 150 × 100 × 50 mm coated with linseed oil (TU 38.301-04-24-93) and an experienced moisture-resistant combined drying oil for light and moisture. Samples were placed on the roof of the house before cracks appeared on the surface of the paintwork and increased volume. The test results showed that the first cracks on drying oil Oxol (TU 38301-04-24-93) appeared after 187 days, and after 284 days the volume of wood increased by 0.15%. While the prototype survived 284 days before the first cracks and 358 days before the increase in volume.

The composition of the prototype moisture-proof combined drying oil:

oxidized mixture of rapeseed oil with paraffin

(paraffin 10%) twenty% Nefras C4 150-200 ° C twenty% oil-drying oil (non-volatile content 60%) 54% desiccant 6%

The obtained drying oil gives a good color, the coatings of paints are not afraid of moisture, the opacity of the paints, the gloss of the coating, the quality of the putty is good.

Technical standards for a solution of an oxidized mixture of vegetable oil with paraffin are shown in table 2.

Table 2 Indicators of drying oil No. p / p The name of indicators Norm Test methods one. Color of iodine scale mg J _2/100 cm ^3, which is darker than 400 GOST 19266-79 2. Conditional viscosity on the B3-4 viscometer with a nozzle diameter of 4 mm at 20 ± 0.5 ° C, sec 15-25 GOST 8420-74 3. Acid number, mg KOH / g, not more than fifteen GOST 17537-72 four. Mass fraction of nonvolatile substances,% 55 ± 2 GOST 5476-80 5. Volume fraction of sludge,% no more absent. GOST 5481-89 6. Transparency complete GOST 5472-50

The polymer constituent of the moisture-resistant combined drying oil according to the invention is a 60% solution of oil-polymer resins with a softening temperature of 72-90 ° C in the kerosene fraction.

So, the claimed invention allows to significantly expand the functionality of drying oil by introducing paraffin, which has hydrophobic properties and increases the moisture resistance of the paint coating, penetrating the surface of the product, protects against moisture, swelling and destruction.

Claims (1)

Combined drying oil, including oil polymer drying oil, which is a 60% solution in the kerosene fraction of oil polymer resins with a softening point of 72-90 ° C, and a desiccant, characterized in that it contains an oxidized mixture of vegetable oil with paraffin with a viscosity of VZ-4 400 viscometer -1100 s at a temperature of 20 ± 0.5 ° C in the form of a 50% solution in a solvent nephras C4 150-200 ° C in the following ratio of components, wt.%:
oil polymer drying oil 54 oxidized mixture of vegetable oil with paraffin (paraffin 3-10%) twenty solvent nefras C4 twenty desiccant 6