Transcription of Melamine Formaldehyde Networks with Improved …
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Melamine Formaldehyde Networks with Improved …
You are now at HOME NEWS PUBLICATIONS LECTURES PATENTS DOWNLOADS Melamine Formaldehyde Networks with Improved Chemical Resistance Blank, He, E. T. Hessell and Abramshe, King Industries Inc. Norwalk, CT. 06852 Introduction Melamine Formaldehyde resins (MFR) are used to crosslink many industrially applied coatings. Much of the MFR used in the US. are of the hexa(methoxymethyl) Melamine (HMMM) type. As reaction partners for HMMM predominantly hydroxyl or carboxyl functional resins are used. The reaction of HMMM with hydroxyl polymers is generally well understood. The reaction is specific acid catalyzed with strong acid catalysts such as sulfonic acid commonly used.
Glycoluril -CH2- Glycoluril Glycoluril The stability of the >N-CH2-N< linkage increases with a decrease in the basicity of the nitrogen. Simple reaction products of formaldehyde with primary amines are only stable in the trimeric form.
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