Resole (synthetic resin)

Resole ( English resole ) are meltable, soluble phenolic resins containing reactive methylol groups contain and in the condensation of phenols with formaldehyde under basic arise conditions. The benzene rings are connected to one another via methylene groups and ether bridges:

Because of their methylol groups, they are, in contrast to the novolaks formed from the same starting materials under acidic conditions , self-curing and not long-lasting. Storage stability can be achieved by etherification of the methylol groups (often with butanol ). At the same time, the solubility in non-polar solvents is improved. Resole ethers of this type are used to produce coating resins. Etherification of the phenolic hydroxyl groups also improves solubility and resistance to alkali and yellowing. To cure the etherified resoles, acidic catalysts and higher temperatures are required (stoving enamels).

Individual evidence

↑ Entry on phenolic resins. In: Römpp Online . Georg Thieme Verlag, accessed on June 15, 2014.
^ Kittel, Textbook of Lacquers and Coatings, 2nd Edition, Volume 2: Binders for solvent-based and solvent-free systems, Ed. Walter Krauss, S. Hirzel Verlag, Stuttgart 1998, ISBN 3-7776-0886-6 .
^ MD Lechner, K. Gehrke and EH Nordmeier: Makromolekulare Chemie , 4th edition, Birkhäuser Verlag, 2010, pp. 130-132, ISBN 978-3-7643-8890-4 .

[1] Entry on phenolic resins. In: Römpp Online . Georg Thieme Verlag, accessed on June 15, 2014.

[2] Kittel, Textbook of Lacquers and Coatings, 2nd Edition, Volume 2: Binders for solvent-based and solvent-free systems, Ed. Walter Krauss, S. Hirzel Verlag, Stuttgart 1998, ISBN 3-7776-0886-6 .

[Lechner-3] MD Lechner, K. Gehrke and EH Nordmeier: Makromolekulare Chemie , 4th edition, Birkhäuser Verlag, 2010, pp. 130-132, ISBN 978-3-7643-8890-4 .