When carrying out repair and decorative work, you cannot do without special compounds. When treating surfaces with varnish and paint, solvents are often used. The rich assortment of formulations offers a wide range of choices. Among the many products, solvent 647 is widely used. The technical and operational characteristics of the composition have made it a leader among a rich range of products..
Today, solvent 647 is included in the list of the most popular and common formulations. Its peculiarity lies in the fact that it contains no ethyl cellosolve and acetone. Due to this, the solution is considered more gentle and can be used when cleaning plastic surfaces. R-647 is chosen when a careful attitude to the treated surface is in the first place..
The solvent is often used when painting motor vehicles, since it can be used in conjunction with both nitro lacquers and nitro enamel. The product can be found in almost any store that specializes in renovation and construction.
When a solvent is used together with nitro enamel, the formed film should not turn white when the composition evaporates. All small defects such as scratches, strokes on the enamel surface are smoothed and smoothed out without effort.
Thinner 647 has the following technical characteristics, which are confirmed by the relevant resolution of GOST 18188-72:
- appearance – a transparent composition, which may have a slight yellowish tint;
- texture – homogeneous (no suspension);
- water – the maximum rate is 0.6%;
- volatility (ethyl ether) – from 8 to 12;
- coagulation – at least 60%;
- density – 0.87 grams per cubic centimeter;
- the maximum acid number is 0.06 mg KOH per gram;
- density – 30.87 g / cm³;
- flammable liquid;
- the storage period of the solution is exactly one year from the date of manufacture;
- self-ignition occurs at a temperature of +424 degrees Celsius, flash – 5 degrees Celsius.
Solvent 647 includes the following elements:
- toulol (41.3%);
- butyl acetate (29.8%);
- butyl alcohol (7.7%);
- ethyl acetate (21.2%).
In addition to its direct purpose, product 647 is used to increase the viscosity of materials containing nitrocellulose. Compared to a similar solvent labeled 646, it is less active and therefore does not damage plastic surfaces. It can be safely used to gently clean the bases from varnish and enamel. If necessary, the solution is added to various paints and varnishes. During the process, liquids must be constantly and thoroughly mixed for uniform distribution..
The proportions are determined according to the instructions. They differ depending on the composition of the paint or enamel.
Before using Thinner 647, you should definitely familiarize yourself with the basic rules of operation and storage.
- The composition must be stored in a tightly closed container. The direct rays of the sun must not shine on the packaging. The room must have a high level of fire safety. Store the solvent out of the reach of children and animals. The ideal location is a dark, dry environment that maintains room temperature.
- When using it is necessary to ventilate the room. If there are no windows, and ventilation does not cope with the volatility of the solvent, you need to install fans in the room..
- The product packaging must contain instructions for using the product..
- Thinner 647 is sold for both industrial and domestic use. Packages from 0.5 to 10 liters are presented at the choice of buyers, as well as large steel drums for bulk purchases.
Carrying out works
Thinner 647 is a flammable liquid. Product R-647 belongs to the 3.1 class of flammable liquids. During work, sparks, smoking and open flames should be avoided. Air mixtures and vapors are also explosive. Air pollution from solvent vapors will pass quickly when the room temperature is 20 degrees Celsius above zero. When spraying with solvent, air pollution passes through even faster.
Experts note that in case of careless handling, the composition may ignite at a distance. Accumulations of volatiles are heavier than air, and due to this they spread along the ground. Interaction with effective oxidants (hydrogen peroxide, acetic acid and nitric acid) can cause explosive peroxide. Despite the fact that the solvent of the above brand can be used to clean plastic surfaces, the substance is aggressive towards some of its varieties..
Formulation reacts dangerously with bromoform and chloroform, causing fire or explosion.
Basic security measures
The use of a solvent provides for strict adherence to the relevant sanitary standards and safety rules. All of these compounds found on store shelves irritate the eyes, skin and respiratory tract..
If proper ventilation is not provided, the solvent will cause a severe cough, and the following negative consequences are also possible:
- loss of creation;
- clouding of mind:
- food poisoning;
- state of narcotic intoxication;
Special work clothes and accessories will help protect yourself from the above and other negative consequences. You can not do without protective glasses, gloves and masks, which will prevent the ingress of toxic substances into the respiratory organs.
The solvent can even infect the bone marrow and blood. If the solvent comes into contact with open skin, it is necessary to urgently wash the affected area with soap or other foaming composition. Otherwise, direct contact may cause dermatitis..
The vapor generated by the volatile components in the formulation is highly irritating to the respiratory tract and eyes. Poisoning is possible due to improper handling and neglect of safety rules.
Individual elements have a negative effect on the internal organs (stomach, intestines, liver) and the nervous system. Solvent components enter the body through the skin or by inhalation.
Packaging and transportation
Solvent formulations are sold in metal or glass containers. Transportation of products is carried out using special road transport. For the transportation of industrial volumes of goods, railway tanks are used..
Due to the increased fire hazard and flammability, special transport measures are necessary.. The container used for the transportation of the solvent must fully protect the solution from moisture and direct sunlight..
Differences between the compositions 646 and 647
To make the right choice among solvent compositions, you need to know exactly the technical characteristics of the product. The leaders in popularity are now solvents labeled 646 and 647. The main difference between the above solvents lies in the composition. In the manufacture of product 646, manufacturers use acetone and ethyl cellosolve, which are not present in the R-647 solution.
Acetone makes the composition more aggressive, and therefore 646 is not chosen when processing delicate surfaces. This is a highly active compound that must be used carefully so as not to damage the paint layer. The components found in both solvents are toluene and butanol..
For information on the difference between a solvent and a thinner, see the following video.