Category: Materials

What solvents belong to aromatic hydrocarbons? Aromatic hydrocarbons are composed of carbon and hydrogen ring molecules. The best known aromatic solvent is benzene, from which other aromatic compounds are derived, such as toluene, xylene and styrene. Since benzene has been found to be …

Already with the current efficiency of approx. 10%, solar power plant located in the desert and covering an area 300 — 1000 km2 (ok. 1/3 the territory of Egypt) would be able to produce energy equal to this, which the whole world consumes, and the solar cell has a surface 30 m2, …

In what coating materials painters and varnishers use acrylic resins as binders?
Painters and varnishers use acrylic resins as binders in plaster primers, in dispersion paints, paints drying by evaporation of the thinner, in two-component fillers, varnishes and paints. Too …

The efficiency of solar collectors depends on the temperature of the working medium.
The efficiency of flat plate collectors decreases with increasing temperature of the working medium, therefore, more than one should not be connected in series.
The number of series-connected Collectors depends on this, what temperature of the medium we want …

ZC20 actuators have been installed in the roof windows to open and close the windows.
The ZC20 chain actuator, thanks to its small dimensions and simple installation method, is a product ideally suited for controlling roof windows.. The actuator is available in two voltage versions 230 V …

External roller shutters have been installed on the roof and L-shaped windows, which ensure full comfort of using the attic and, in the case of a passive house, provide energy protection. They help to maintain the right temperature inside the room regardless of the season, provide protection against outside noise …

Polymer resins and varnishes

What are polymer resins?
The resins are named after the reactions leading to their production: polymerization, polycondensation and polyaddition. Thus, polymer resins are produced by the polymerization method. In this chemical reaction, small monomers bind into macromolecules (giant particles) …

Epoxy resins and varnishes

What hardeners are most suitable for epoxy varnishes?
Polyamines are primarily used as hardeners for epoxy resin varnishes, polyamides and polyisocyanates. However, only such a hardener may be used, which the varnish producer requires. Only this one …

To which fire hazard class do the following solvents belong:
a) Spirytus należy do klasy zagrożenia pożarowego B, because it is soluble in water, and its flash point is below 294 K (21°C).
b) Turpentine is insoluble in water and has temperature …

Please explain, why the so-called. Universal thinners can dilute a wide variety of binders
The dissolving power of a solvent depends on the intermolecular forces in the solvent and the binder being dissolved. Both individual groups of solvents, and different binders have very different intermolecular forces. Universal thinners include …