Working Report, 20/2006 – Substitution of cobalt driers in wood coatings

Substitution of cobalt driers in wood coatings

Colophon

Title:
Substitution of cobalt driers in wood coatings

Key Subjects:
substitution

Key Subjects in Danish:
substitution

Abstract:
The best candidate to substitute cobalt in oxidative drying coatings like alkyd paints is in this study shown to be a vanadium drier. Overall good drying properties are achieved, and at medium dosage level, yellowing is not really an issue even in light opaque systems. Hardness is not developed as fast as with cobalt but ends up at the same level. However to avoid prolonged tackiness of the resulting wood coating partly use of modified binders is required in the major part of a product range.

Abstract in Danish:
Formålet med dette projekt var at undersøge muligheden for at substituere kobolt i eksisterende produkter, samt at opnå en bedre forståelse for, hvordan forskellige parametre i sikkativsystemet sammen med alkydens sammensætning påvirker tørreegenskaberne hos forskellige typer af overfaldebehandlinger. En række sikkativer er undersøgt som mulige substitutionsmuligheder for cobalt sikkativer og et vanadiumsikkativ gav de bedste resultater med hensyn til tørringsegenskaber. Ved tilsætning af en mængde der ligger midt i det anbefalede interval fra producenten var gulning egentlig ikke et problem i lyse transparente systemer. Desværre giver vanadium problemer med klæb, hvilket betyder, at vanadium ikke kan erstatte kobolt i en produktserie om end hårdheden opnås med tiden men med en lavere hastighed.

Series title and no.:
Working Report, 20/2006

Publisher:
Danish Environmental Protection Agency

Performing organization(s):
Dyrup A/S

Copyright:
Danish Environmental Protection Agency

Creators:
Larsen, Jakob Kjær
Wallström, Eva

Contributor:
Schultz Grafisk (web)

Language:
eng

URL:
http://www.mst.dk/

ISBN nr. Electronic version:
87-7052-137-9

ISSN nr. Printed version:
0908-9195

Version:
1.0

Version/edition:
2006-08-09

Data formats:
html, gif, pdf, css

Inventory:
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Publisher category:
statslig