House and renovation
Calcium cycle – Lime binder (quicklime) obtained by subjecting a limestone (calcium) firing at a temperature of approx. 1273 K (1000°C). The calcium carbonate is decomposed into calcium oxide and carbon dioxide.
When slaking lime, calcium oxide binds water …
The simplest, and at the same time the most widely used active systems, there are installations preparing domestic hot water. These systems present a varying degree of complexity: from simple portable devices to the preparation of domestic hot water, through the "bread box" - black barrels with water, placed in specially molded …
What is meant by "reversible binders"?
Reversible binders dry physically by evaporating the solvents. After it is dry, Reversible binders can be redissolved with the same solvents, in which they were dissolved before drying.
What binders are most often used for water-soluble varnishes and paints?…
Eaves of roofs with an attic with a layer of initial covering with low vapor permeability brought to the gutter – the air supply opening of the ventilation gap of the cover forms a comb based on a wedge board:
a) okap nadwieszony z deskowaniem samego okapu
b) hood without overhang with full …
Specially prepared Fakro roof and elbow windows, as well as an appropriate assembly system with the use of additional assembly accessories, provide very good thermal insulation and tightness parameters, which allows them to be used in passive construction. Pivot windows, as well as L-shaped windows, have been equipped …
Unsaturated polyesters and unsaturated polyester varnishes
Please present the composition of unsaturated polyester resin varnish
The main component of the varnish contains a styrene solution of unsaturated polyester resin and an accelerator. The main component of the paints also contains pigments. The hardener, on the other hand, contains peroxides.
Please describe …
What is the difference between dispersions and proper solutions?
While in the case of a proper solution, the dispersion of the binder in the solvent is molecular and below the size 0,0001 /im (0,0000001 mm), in the case of dispersion, the particles of the binder consist of many particles and …
What are the tasks of binders in painting materials and their coatings??
The binder binds the components of the coating material together. Otherwise, the binder ensures the adhesion of the coating to the substrate. It also affects the appearance of the substrate and provides protection.
What binders show effect …
Most often, solar radiation receivers are set to work in three variants:
1) maksimum zysków w ciepłej porze roku, in months from IV to IX, e.g. domestic hot water preparation installations,
2) maksimum zysków w zimnej porze roku, in months from …
From what raw materials are alkyd resins made?
Alkyd resins are made of dicarboxylic acids (generally phthalic acid is used), multivalent alcohols (usually a trivalent alcohol – glycerin) and fatty acids (e.g. from linseed oil).
What are modified alkyd resins?…