Please explain, why coating removers can be used to remove coatings containing alkyd resins as a binder.
Alkyd resins are esters, which under the influence of removers are saponified and thus become soluble in water.
Please discuss how coating removers work.
Coating removers contain strong solvents, causing physical swelling of the coating and its partial dissolution. After a certain time of action of the remover, the coating can be scraped off with a putty knife. Residues are washed off with organic solvents. There are also removers containing emulsifiers, so that they can be completely washed off with water.
How do the so-called. biodegradable coating removers?
These removers do not contain chlorinated hydrocarbons, as a result, they are less harmful to the environment than others. The lyes contained in the so-called. biodegradable coating removers have a saponifying and dissolving effect on coatings. The solvents contained in them then dissolve the coating completely. Due to the lower efficiency of dissolving solvents contained in removers, a longer time of their action is usually necessary.