- Inorganic hybridized methanol etherified melamine resin and preparation method thereof
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The invention belongs to the technical field of inorganic hybridized polymer materials and particularly relates to inorganic hybridized methanol etherified melamine resin and a preparation method thereof. The preparation method mainly includes steps: (1) etherification reaction, to be more specific, adding hexamethylol melamine and methanol into a reactor, and performing thermal reaction to obtain tetra-etherified or penta-etherified melamine resin; (2) alkali neutralization; (3) hybridization reaction; (4) distillation for removing residual methanol; (5) cooling and filtering to obtain a finished product. The inorganic hybridized methanol etherified melamine resin prepared according to the method has advantages that by hybridization cross-linking reaction with inorganic hybrid compounds, high-temperature flame-retardant elements such as boron, molybdenum and stibium are added into amino resin generated finally, and accordingly high temperature resistance and flame retardation of the amino resin are improved, and the resin is mainly applied to preparation of combined polyether and paint.
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Paragraph 0035-0042
(2017/06/13)
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- Continuous process for production of methylol melamines and use thereof for production of highly etherified melamine resins
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The object of the present invention is a novel continuous process for the production of methylol melamines, especially of hexamethylol melamine and of a mixture of higher methylol melamines, wherein a continuous synthesis from a formaldehyde solution and melamine is combined with a continuous drying of the resulting product mixture, whereby a product in the form of a powdery material with a low content of free formaldehyde and water is obtained. Simultaneously, the invention also relates to a process for the production of highly etherified melamine resins based on hexamethylol melamine produced by a process according to the present invention and to the use of hexamethylol melamine produced by a process according to the present invention in a process of the production of highly etherified melamine resins. Particularly, the invention relates to a process of the production of hexamethoxymethylol melamine (HMMM), hexabutoxymethylol melamine (HBMM) and mixed ethers of C1-C5 alkohols on the basis of hexamethylol melamine produced by a process according to the invention.
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Page/Page column 8
(2008/06/13)
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