937-35-9Relevant articles and documents
Inorganic hybridized hydroxymethyl melamine phosphate and preparation method thereof
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Paragraph 0035; 0036, (2017/06/08)
The invention belongs to the technical field of inorganic hybridized polymer materials and particularly relates to inorganic hybridized hydroxymethyl melamine phosphate and a preparation method thereof. The preparation method mainly includes steps: (1) hydroxymethylation reaction, to be more specific, adding melamine, formaldehyde and water into a reactor, and performing hydroxymethylation reaction under a weak-alkaline medium condition to obtain hydroxymethyl melamine; (2) hybridization reaction, to be more specific, reacting with inorganic hybrid compounds; (3) salt forming reaction; (4) cooling and filtering, to be more specific, cooling to 40DEG C or below, crystallizing and filtering to obtain the inorganic hybridized hydroxymethyl melamine phosphate. The inorganic hybridized hydroxymethyl melamine phosphate prepared according to the method has advantages that by hybridization cross-linking reaction with the inorganic hybrid compounds, high-temperature flame-retardant elements such as boron, molybdenum and stibium are added into hydroxymethyl melamine phosphate generated finally, and accordingly high temperature resistance and flame retardation of the hydroxymethyl melamine phosphate are improved.
Canonical Chemical Theories Exemplified by the Mehtylolation of Urea and Melamine
Gebregiorgis, Taddesse,Gordon, Manfred
, p. 359 - 382 (2007/10/02)
Old and recent data on equilibria and kinetics of methylolation of urea and melamine are analysed.The theoretical framework affords a sequence, claimed to be canonical of successive phenomenological approximations.The theory, expounded earlier, begin with two successive schemes whose essentials go back to early work by Pauling and by Flory.The two stages here suffice to show that all the data from eight laboratories, covering the six-membered family of methylol ureas and rhe ten-membered family of methylol melamines, are in quantitative agreement, a circumstance unsespected by other workers in the field.The statisticalthermodynamic and kinetic principles involved are therefore expounded in more detail than before.Using them, very small substituent effects (e.g O.35 kJ kol-1 are deduced with high significance and accuracy.Owing largly to the recent measurement by Tomita, the methylol melamines are claimed currently to be the thermdinamically best characterised family in the chemical literature.A challenge arises for theoretical chemists to test quantum-theoreticaltechniques against the measured energetics of substituent effects in this family, and to exploit for other families the graph-theoretical analysis of molecular additivity which underlies the approximation schemes, which already well tested.