Thinner 646 is a very effective universal solvent, designed for use with various paints and varnishes. Thanks to him, coatings after drying acquire an additional shine. From this article you will learn:
- what is solvent 646;
- specifications;
- GOST, the requirements of which it meets.
General solvent characteristics
Solvent brand 646 is a clear, colorless liquid (in some cases it may have a yellowish tint), characterized by a specific odor. The density of the solvent is 0.87 g per cubic meter. see, it does not freeze and does not gain viscosity. It ignites spontaneously at a temperature of 403 degrees, boils at 59 degrees.
It is made in accordance with the requirements of the standard GOST 18188-172. The solvent should have a uniform composition. It should not be observed haze and delamination. Also, the presence of suspended particles in the liquid is not allowed.
Available in industrial containers, in plastic and glass containers (bottles) of various sizes.
Solvent 646: technical characteristics, composition
It is a compound of volatile organic substances. The solvent 646, the technical characteristics of which correspond to GOST 18188-72, includes the following substances:
- toluene - 50%;
- butanol - 15%;
- butyl acetate - 10%;
- ethyl alcohol - 10%;
- acetone - 7%;
- ethyl cellosolve - 8%.
Due to its composition, it is considered the most active solvent material.
Solvent 646 specifications has the following:
- ethyl volatility values range from 8 to 15;
- the coagulation number is at least 35%;
- acid number does not exceed 0.06 mg KOH / g;
- the proportion of water (according to Fisher) is not more than 2%;
- diluting effect - after drying, the presence of whitening and film is not observed, nitro enamel is characterized by a smooth surface without spots.
Where is it used?
Technical characteristics of solvent 646 make it possible to use it for working with various paints and varnishes, including nitrocellulose, melaninamide, glyphthal, acrylic, and epoxy. It is used either as an additive in the production of these materials, or for their dilution to the required consistency before use. Also, this reagent is added to putties and primers to create the optimal working consistency, which makes it possible to perfectly level the surfaces.
In some cases, the solvent R-646, the technical characteristics of which correspond to GOST, is used as a material for degreasing various surfaces or for washing equipment (in order to optimize a certain technological process).
What are the advantages of solvent 646?
Among the main advantages of the solvent brand 646 are the following:
- characterized by universality of application;
- very high dissolving power;
- gives coatings extra shine;
- easy to use;
- does not cause burns in case of contact with the skin surface;
- does not form greasy spots on the treated surfaces;
- evaporates without leaving a smell.
Mode of application
The solvent is added to the paint or varnish in small parts to the desired density and viscosity. The diluted mixture should be constantly mixed. Since the solvent is characterized by high activity, special care should be taken when working with it so as not to spoil the lower coating layer.
Solvent Precautions
Work must be carried out in rooms equipped with good ventilation, since the substance is toxic (assigned to the third hazard class). In addition, personal protective equipment such as a respirator and gloves should be used when working with solvent grade 646. Safety glasses are also recommended.
If the reagent has got on the skin area, it must be treated with water (warm) using soap. In case of contact with the mucous membrane of the eye after washing, consult a doctor.
Given that this solvent is a flammable material, it is necessary to handle it carefully and in no case allow open flame, sparks, and smoking near containers with a reagent.
How to store?
The solvent is stored in a tightly closed container. In addition, the container with the reagent must be protected from moisture, direct sunlight, heat. Do not leave any heating appliances in the immediate vicinity of solvent containers.
The guaranteed storage period (according to the manufacturers' information) from the date of manufacture is 12 months, which enables enterprises to purchase these products in large quantities.
The temperature values at which the solvent is stored are in the range of minus 40 to plus 40 hail.