Alkyd–epoxy blends as multipurpose coatings

Abstract

In the published article cited above, an error was incurred in Scheme 1. The correct Scheme 1 is shown below.Scheme 1 Schematic representation of the phenomenon occurring during the crosslinking of the blend.

Effect of the NCO/OH ratio on the properties of Mesua Ferrea L. seed oil‐modified polyurethane resins

“…The cured resins were utilized for determination of the film properties, such as ‘pencil hardness’, gloss, lap shear for adhesive strength, impact resistance and flexibility. The most important feature of these resins is that they can be cured at ambient temperature under ‘open environmental conditions’, which was not possible in the case of the previously reported polyesters and poly(ester amide) resins8–10 from the same oil. These properties of the resins are presented in Table 4.…”

“…The earlier reported11 Mesua Ferrea L . seed oil‐modified poly(urethane amide), which was cured at room temperature and post‐cured at an elevated temperature (120 °C), showed no significant improvement in physical properties with respect to the reported polyester and poly(ester amide) resins of the same oil 8–10. In particular, they have a very low ‘pot life’.…”

“…These feed stocks are well accepted by chemists because of social, economical and environmental reasons. Fortunately, many researchers are now using renewable natural resources as their feed stocks in the development of many polymers 6–15…”

“…This oil possesses mainly triglycerides of linoleic, oleic, palmitic and stearic acids 16. Its potential as a feedstock in the development of polymers has been exploited in the case of polyesters,8, 9 poly(ester amide)s10 and poly(urethane amide)s11 by Karak and coworkers.…”

“…The aforementioned Mesua Ferrea L. seed oil‐modified polyester8, 9 or poly(ester amide)10 resins are possible to cure only at elevated temperatures (∼150 °C) with a metal drier system. These metal driers are said to have adverse environmental and durability effects.…”