The material selection platform
Plastics & Elastomers
The material selection platform
Plastics & Elastomers
Online Course

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

On-Demand Course

Recorded on Sep 28, 2016

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...).

Read the full Course Outline

Johan Bieleman Presented By:
Johan Bieleman
Length: 90 min

Course Type: Formulation
Level: Intermediate

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Package includes:

.wmv Courses Recording, Presentation Slides & Transcript of Q&A session

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 term 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 view this course?

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

Course Outline

The following sections will be covered during this session:
  1. Introduction
  2. Autoxidation and cross-linking of air-drying WB- and SB- paints
         • Autoxidation drying process
         • Role of metal ions in autoxidation reactions
  3. Key characteristics of main siccatives
  4. Application of drier combinations
  5. Optimizing drier selection for waterborne alkyd paints
         • Main parameters affecting drying performance
         • General drier combinations for WB systems
  6. 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
  7. Replacing cobalt driers
         • Main reasons for reviewing cobalt drier
         • REACH status of cobalt carboxylates
         • Potential replacements for cobalt drier
         • New developments
  8. 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
  9. Summary

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Members Reviews

Very good! The course gave a good overview of the subject.

Ann-Charlotte H. , from Engwall o. Claesson AB

It verified that we are using the correct driers for our alkyd and offered tips for a wrinkling issue.

Bill Z. , from Seymour of Sycamore

Very acute topic!

Ville T. , from Tikkurila Oyj

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