Some characteristics of urea-formaldehyde powder adhesives
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چکیده
منابع مشابه
Urea-formaldehyde Adhesive Resins*
Approximately 1 million metric tons of urea-formal-dehyde resin are produced annually. More than 70% of this urea-formaldehyde resin is used by the forest products in-*This information was written and prepared by a U.S. Government employee on official time and it is, therefore, in the public domain and not subject to copyright.
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The structure formation in acid promoted polycondensation and particularly in alkaline post-treatment with urea was studied by 13C NMR spectroscopy in the three-step synthesis of ureaformaldehyde resins. Trishydroxymethyl urea was identified as the constituent of the mixture of hydroxylmethylated urea derivatives obtained in alkaline conditions. The formation of methylenes linked to secondary o...
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ژورنال
عنوان ژورنال: Glasnik Sumarskog fakulteta
سال: 2006
ISSN: 0353-4537,2217-8600
DOI: 10.2298/gsf0694223m