Formulation Material Selection

Cobalt-free Driers for Alkyd Coatings: Optimal Selection & Use

Cobalt-free Driers for Alkyd Coatings: Optimal Selection & Use
Language: English
Length: 90 min
Recorded on: 28 Sep 16

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6 month access to Course Recording, Presentation Slides, Q&A Transcript

Course Description

Ease your cobalt-free driers selection by reviewing how to improve alkyd coatings drying & hardness performance with an optimal selection and use of combination of driers (Mn, Ca, Zr…) in waterborne and high-solids formulations.

Johan Bieleman will share his expertise making efficient cobalt-free surface & auxiliary driers combination to meet today's top challenges (optimal tack-free time & gloss...).
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Johan Bieleman
Johan Bieleman
Patcham
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Johan Bieleman has been working in the coating industry for more than 40 years.
He graduated in organic chemistry and concluded his studies in paint and polymer technologies in 1971.
Johan has held management positions in R&D and marketing departments at companies such as Servo-Delden BV / Nuodex Colortrend / Elementis Specialties. He has worked as a consultant for Ciba / EFKA, Soujanya, CP Kelco, SpecialChem and for Patcham, UAE (since 2008).
Johan Bieleman has published several technical articles and papers mostly dealing with colorants and coating additives. In addition, he is the editor of "Additives for Coatings", published by Wiley-VCH.

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Why should you view this course?

Cobalt driers being under scrutiny, industry is under pressure to find less toxic alternatives. At present, no ready-to-use solution works perfectly and success is in the ability to combine driers together for an efficient multi-step effect. In this context, better forget about the trial-and-error approach and review how the various driers work to make educated decisions!

  1. Open up to finer drying / hardness optimization with cobalt alternatives by better understanding the role of metal ions on autoxidation/cross-linking processes

  2. Clarify how alternative driers (Mn, Fe, Cu, V, Ce...) compare against Cobalt in terms of catalyst, film hardness, color, skin formation... to build effective combination

  3. Troubleshoot faster problems (loss of dry, wrinkling, water retention, soft film, poor gloss, discoloration, durability…) using the right surface & auxiliary driers at the right loading

Who should join this course?

  • Formulators, technicians, managers involved in the development of air-drying waterborne and high solids alkyd paints, inks, and varnishes.

  • This course is suitable for intermediate level proficiency
    Intermediate
Course Outline

The following sections will be covered during this session:

Introduction

Autoxidation and cross-linking of air-drying WB- and SB- paints

  • Autoxidation drying process
  • Role of metal ions in autoxidation reactions

Key characteristics of main siccatives

Application of drier combinations

Optimizing drier selection for waterborne alkyd paints

  • Main parameters affecting drying performance
  • General drier combinations for WB systems

Optimizing drier selection for high solids alkyd paints

  • Main shortcomings of high solid paints in relation to drying
  • Proven successes for high solid paints
  • Effect increased by cobalt drier

Replacing cobalt driers

  • Main reasons for reviewing cobalt drier
  • REACH status of cobalt carboxylates
  • Potential replacements for cobalt drier
  • New developments

Problem solving by drier optimization

  • Poor tack-free time
  • Poor total dry
  • Loss-of-dry
  • Poor gloss in WB alkyds
  • Soft film in HS alkyd

Summary

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Cobalt-free Driers for Alkyd Coatings: Optimal Selection & Use
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