Alkyd enamel: composition, solvents, application features
Table of contents
1 What it is
- 1.1 Structure
- 1.2 representatives
- 1.3 Characteristics
2 Substrate preparation
- 2.1 Steel
- 2.2 Wood
- 2.3 Concrete
- 3 Care
- 4 removal
- 5 conclusion
Greetings, comrades! Our today's topic - alkyd enamel. We have to learn that part of the alkyd paint, how to prepare the base for painting, how to apply enamel and how to remove it from previously painted surfaces. Proceed.
I beg to love and favor: alkyd gloss enamel.
What it is
Base Alkyd enamel - Nitrocellulose lacquer or glyptal, reaction products of polyhydric alcohols with fatty acids in the presence of anhydrides. Raw materials for their production are vegetable oils - castor, linseed and sunflower.
Besides the basics, as part of the paint are present:
- titanium dioxide (Titanium dioxide);
The white paint based on titanium dioxide retains its color indefinitely. Cheaper zinc white fade at high temperatures, and the coating gradually turns yellow.
Colored paint on zinc oxide radiator yellow for 1-2 years.
- White Spirit (diluent). He carries the paint to the workability and accelerates its drying.
Optionally, depending on the color of the enamel in the alkyd paint can be added:
- zinc oxide;
- small coal (Carbon black) to obtain a black and gray;
- iron blue, Giving the blue color of the paint.
The former Soviet Union most widely used two Enamels:
|PF-115: weatherproof paint for exterior and interior applications.|
|PF-266: paint for interior decoration. A key feature - high wear resistance, therefore the enamel is mainly used for dyeing sexes.|
The first digit alphanumeric index indicates the area of application. If the paint or varnish number begins with unity, they can be used for coating surfaces maintained in atmospheric conditions. Deuce says that the coverage should be used only indoors. From scratch begin designations primers.
Production of alkyd paints was launched in the USSR in the early 60-ies of the last century. Initially, the most popular of PF-115 was produced in accordance with GOST 6564-63, but in 1977 a new regulatory document was adopted instead - GOST 6564-76. Despite its age, this standard is valid to this day.
In many countries of the former Soviet Union produce enamel by Soviet standards to this day.
Here are the technical characteristics of the two most popular enamels.
|Operating temperature||-50 - +60 ° C|
|Drying time one layer||24 hours|
|Life time||Decorative coating properties are maintained for at least a year, safety - not less than 4 years|
|Consumption||0,08-0,13 kg / m2|
|Diluent||Solvent, turpentine, mineral spirits. Diluents can be mixed in a ratio of 1: 1|
|compatible surface||Metals, wood, concrete|
|Texture||Matte or semi-matte|
|The price per kilogram||100-150 rubles (important for the spring 2017).|
Metal frame painted balcony on the photo alkyd enamel PF-115.
|Consumption||0.15-0.18 kg / m2|
|Life time||3-5 years|
|Diluent||Solvent, turpentine, mineral spirits|
|compatible surface||Metals, wood, concrete|
|The drying time of one layer||24 hours|
|Texture||Glossy or semi-gloss|
|The price per kilogram||70-100 rubles|
In practice, how much drying enamel of this type is determined by many factors:
- air temperature (Drying at 100 degrees is reduced to 2 hours at -10 takes at least 3 days);
- humidity. The higher it is, the slower the paint dry;
- Ventilated room or wind power. In the saturated evaporation of the diluent air drying is slowed down considerably;
The better ventilated room, the paint will dry faster.
- Thick layer of paint. The thinner the layer, the quicker it dries;
- toughness enamel. The thicker it is, the slower the dry coating.
To reduce the viscosity of paints they are diluted with a compatible solvent and mix until smooth. I use to dilute the PF-115 white spirit or solvent in an amount up to 10% of the paint volume.
As with their hands to prepare the surface for painting? Instruction depends on the type of substrate.
|Picture||Tier surface preparation|
|Scraping rust. The formation rust is removed with a spatula, a thin corroded surface layer - metal brush.|
|Degreasing. The surface is wiped with a cloth soaked in gasoline, acetone, mineral spirits or other solvent.|
|Padding. Applied at the degreased surface in 1-2 layers glyptal primer GF-021.|
In preparation of the wood are two differences from the preparation of the metal painting:
- Instead of rust from the surface you want to remove the resin. In particular this applies to coniferous wood - pine, spruce and fir;
To clean the timber from the resin usually used turpentine or acetone. At the same time, they are degreased surface.
- Priming in the case of timber is not necessary: the paint perfectly kept on the porous surface without any intermediate coating.
Enamel for exterior use is better to put on the wood after the impregnation varnish. Impregnation does not affect the adhesion of the paint, but several reduce its consumption and, most importantly, reliably protect the wood from rotting.
Drying oils give the wood surface hydrophobic properties and prevent rotting.
In the preparation of concrete for painting the main task - to completely clean the surface from dust that can interfere with paint adhesion to the substrate. It's enough to wash the concrete with water and allow it to dry completely. Primed surface can glyptal GF-021, or the same ink, diluted to 10% diluent.
The colored alkyd enamel surface can be washed by any household detergents containing no alkalis, acids and organic solvents.
To remove the layer of old alkyd paint, is usually used universal stripper. It is applied to the painted surface, and after 10-15 minutes the softened paint can be easily removed spatula. Instead of washing can use hair dryer building: the paint is heated in size 20-30 cm in diameter portions and again removed spatula.
tool set for stripping old paint.
I hope that I was able to answer all the questions accumulated in the reader. Learn more about where and how to use alkyd enamel, the video will help you in this article. Waiting for your additions to it. Good luck, comrades!