This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Use of Blocked Isocyanates in Automotive OEM Clearcoats
Annotation ability available
Sector:
Language:
English
Abstract
Automotive OEM clearcoats have been developed and commercialized using blocked isocyanates which offer good etch resistance. The key technical problems are yellowing, sag resistance and the high cure temperatures needed when blocking agents such as oximes are used. Yellowing of coatings that contain blocked isocyanates was a major problem that limited their introduction in automotive clearcoats. Sag resistance and other physical properties have been improved by incorporating high imino functional melamines into the clearcoat formulation.
Recommended Content
Technical Paper | Fundamental Study of Ultra Scratch Resistance Coatings |
Technical Paper | Chip Resistant Coatings for the Automotive industry |
Technical Paper | 1K and 2K Polyurethanes for Automotive Topcoats |
Authors
Citation
Briggs, R., "The Use of Blocked Isocyanates in Automotive OEM Clearcoats," SAE Technical Paper 950800, 1995, https://doi.org/10.4271/950800.Also In
References
- Phillips, L.N. Parker, D.B.V. POLYURETHANES The Plastics Institute, Iliffe Books Ltd. London, England 1964
- Dombrow, B.A. POLYURETHANES Second Reinhold Publishing Corp New York, New York 1965
- Cook, V.C. 1992
- Wicks, Z.W. BLOCKED ISOCYANATES Progress in Organic Coatings 3 1975 73 99 Elsevier Sequoia S.A. Lausanne, Netherlands 1975
- Wicks, Z.W. BLOCKED ISOCYANATES Progress in Organic Coatings 3 1975 73 99 Elsevier Sequoia S.A. Lausanne, Netherlands 1975
- Briggs, R.L. Knight, M. 1994
- Cook, V.C. Brunsch, T.R. United States Patent 5 216 078 1993