For which binders is turpentine suitable as a solvent?
Turpentine can be used as a solvent for oil varnishes and based on alkyd resins. It is also suitable as a solvent for many natural resin varnishes.
What are the species of turpentine? Please state their origin. The best species is balsamic turpentine, produced by sparing distillation from coniferous resin.
Extraction turpentine is produced by steam distillation from coniferous remnants (formerly from the roots of conifers). Sulfate turpentine is a by-product, arising in the production of cellulose. As stated, that 8-3-karen contained in turpentine may cause allergy (known as turpentine pruritus), this component is generally removed from turpentine.
What is the flash point of a solvent?
The flash point of a solvent is the lowest temperature, in which so many more solvent vapors are formed, that it can catch fire. The liquid solvent itself cannot be ignited with a flame – there must be a solvent vapor, which caught fire. In the combustion process, due to the high temperature, the solvent evaporates intensively, therefore, when ignited, the fire expands rapidly. Solvents are classified into fire hazard classes according to their flash point.
Solvents are divided, according to their solubility in water, for fire hazard classes A and B. Class A solvents are insoluble in water, and those belonging to class B dissolve in it.
The fire hazard classes A and B are further subdivided – depending on the flash point of the solvents. Thus, Class A1 solvents are insoluble in water and have a flash point below 294 K (below 21 ° C). These solvents are labeled "Flammable" and a black flame symbol on an orange-yellow background (danger symbol F according to the ordinance on hazardous materials).
Solvents insoluble in water, about the flash point 294 K (21°C) – 328 K (55°C) belong to the fire hazard class A2 and bear the warning "flammable". Marking with the danger symbol is not required. Solvents insoluble in water, whose flash point is 328 K (55°C) – 373 K (100°C) belong to the fire hazard class A3. Warning and danger symbols are not provided for here.
Water-soluble solvents with a flash point below 294 K (21°C) belong to the B fire hazard class and are marked with the words "flammable". They must, similarly to solvents belonging to the fire hazard class Al, be marked with a black fire symbol on an orange-yellow background.