Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Technologies  > Powder coatings  > Properties of powder clear coatings system...

Wednesday, 18 September 2019
pdf
Raw materials & technologies, Technologies, Powder coatings

Properties of powder clear coatings systems modified with hydrotalcites

Tuesday, 12 April 2016

In a study, Polish researchers examined polyurethane powder clear coating systems consisting of polyester resin, blocked polyisocyanate and hydrotalcites (HT) intercalated with carbonate, aminododecanate, and ethylenediaminetetraacetate.

Powder coatings containing LDH resulted in improved coating properties. Source: NN/Fotolia.com

Powder coatings containing LDH resulted in improved coating properties. Source: NN/Fotolia.com

The blocked polyisocyanate crosslinkers for powder coatings were synthesised using trimethyhexamethylene diisocyanate (TMDI), formic acid, ε-caprolactam, dibutyltin dilaurate and triethylamine as catalysts. The powder coatings were investigated by atomic force microscopy (AFM) and X-ray diffraction analysis (XRD).

Surface and chemical structure correlate

The surface structure was correlated with the chemical structure of the coatings and macroscopic surface behaviour: contact angle, surface free energy, gloss, elasticity, cupping, impact and scratch resistance, hardness as well as adhesion to steel surface. The best properties were observed in coatings modified with Zn,Al-ALA LDH.

The study is published in: Progress in Organic Coatings, Volume 95, June 2016, Pages 120–126

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register