Effects of organo clay on film properties of alkyd‐phenol formaldehyde resins

Abstract

PurposeIn this study, organo clay modified alkyd resins were synthesised and these modified alkyd resins were cured with different ratios of phenol formaldehyde resin. The purpose of this paper is to investigate the physical and chemical properties of the films and thermal behaviours of the resins.Design/methodology/approachAlkyds formulated to have an oil content of 40 percent were prepared with phthalic anhydride (PA), glycerine (G), coconut oil fatty acid (COFA), dipropylene glycol (DPG) and organo clay. “K alkyd constant system” was used for the formulation calculations of the alkyd resins. Alkyd resins were blended with 30 percent of a phenol–formaldehyde. The films of the alkyd–phenol formaldehyde (A‐PF) resins were prepared from 60 percent solid content xylene solutions by using 50 μm applicators. After the films were cured at 150°C for 2 h in an oven, properties of the films were determined.FindingsThe effect of organo clay addition on the film properties such as drying degree, hardness, adhesion strength, impact resistance, water, acid, alkaline, solvent resistance and thermal behaviours of the resins were investigated. The addition of organo clay has a positive effect on the physical and chemical film properties for phenol formaldehyde resin.Originality/valueThe paper reports on a study in which organo clay modified A‐PF resins for manufacturing of industrial baking enamels were synthesised for the first time.

Effect of surface modified TiO2 nanoparticles on thermal, barrier and mechanical properties of long oil alkyd resin-based coatings

“…The certain increase of the surface hardness of air dried alkyd coatings by addition of colloidal SiO 2 particles was also observed by Kurt et al [49]. Furthermore, Bal and coworkers [50,51] have found that NC coatings based on alkyd-melamine formaldehyde resin and modified silica, as well as films prepared from alkyd-phenol formaldehyde resin and organo clay have higher König hardness than pure resin. On the other hand, obtained results revealed that AR65/TiO 2 -DHBAOA has slightly lower value of the König hardness than pure alkyd resin.…”

Preparation and properties of short oil alkyd resin/TiO2 nanocomposites based on surface modified TiO2 nanoparticles

“…For example, Kurt et al observed slight increase of the surface hardness of air dried alkyd coatings after addition of colloidal SiO 2 particles. Also, Bal et al observed that coatings based on alkyd‐phenol formaldehyde resin and organo clay or alkyd‐melamine formaldehyde resin and modified silica have better König hardness than pure resin.…”