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Pyrolysis of melamine–formaldehyde and urea–formaldehyde resins
Journal of Applied Polymer Science, 1991AbstractPyrolysis of melamine–formaldehyde and urea–formaldehyde resins in helium and air was investigated by means of TG and gravimetry with isothermal heating, as well as elemental and HCN analyses. Weight loss curves suggest three kinds of reactions involved in the pyrolysis, namely, initiation reactions, reactions splitting off volatile fragments ...
Toshimi Hirata +2 more
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Epoxy resin modified urea formaldehyde and silicon urea formaldehyde as microwave absorbers
2008 International Conference on Recent Advances in Microwave Theory and Applications, 2008In recent days, various microwave absorbers are used for electromagnetic interference and compatibility measurements in anechoic and semi-anechoic chambers. The authors have synthesized three different polymer composites of epoxy resin modified by urea formaldehyde and silicon urea formaldehyde of different wt%.
M. Murugan +3 more
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Известия СПбЛТА, 2023
Для снижения токсичности древесностружечных плит применяют карбамидоформальдегидные смолы с низким мольным соотношением формальдегида и карбамида - 1,0 и менее. Плиты на основе этих смол имеют пониженную прочность и водостойкость и увеличенное время прессования. Указанные недостатки объясняются особенностями новых смол.
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Для снижения токсичности древесностружечных плит применяют карбамидоформальдегидные смолы с низким мольным соотношением формальдегида и карбамида - 1,0 и менее. Плиты на основе этих смол имеют пониженную прочность и водостойкость и увеличенное время прессования. Указанные недостатки объясняются особенностями новых смол.
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Curing of urea-formaldehyde resins with a molar ratio of formaldehyde to urea less than one
Известия СПбЛТА, 2022В ходе исследований установлено, что отверждение карбамидоформальдегидных смол (КФС) с образованием пространственно сшитой структуры при мольном соотношении формальдегида к карбамиду менее единицы происходит благодаря образованию инертного соединения – метилендикарбамида (МДК).
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Journal of Applied Polymer Science, 2006
AbstractColloidal particles formation followed by their clustering have been shown to be the normal way of ageing of aminoplastic resins, namely urea–formaldehyde (UF) resins, melamine–formaldehyde (MF) resins, and melamine–urea–formaldehyde (MUF) resins. Ageing or further advancement of the resin by other means such as longer condensation times causes
A. Despres, A. Pizzi
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AbstractColloidal particles formation followed by their clustering have been shown to be the normal way of ageing of aminoplastic resins, namely urea–formaldehyde (UF) resins, melamine–formaldehyde (MF) resins, and melamine–urea–formaldehyde (MUF) resins. Ageing or further advancement of the resin by other means such as longer condensation times causes
A. Despres, A. Pizzi
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Formaldehyde and urea formaldehyde cavity wall insulation
Structural Survey, 1984Formaldehyde and UF foam cavity wall insulation Urea formaldehyde (UF) foam cavity wall insulation was introduced into this country, from Denmark, in 1959. Relatively little was installed until after the oil crisis which followed the Arab‐Israeli War of 1973. In total, some 1.5 million buildings have been insulated with it.
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Urea-Formaldehyde and Melamine-Formaldehyde Condensations
Industrial & Engineering Chemistry, 1952openaire +1 more source