摘要:
A melamine container is hot pressed and contains: melamine powder material, melamine-granule basic material, bakelite powders/granules and urea powders/granules. The melamine-granule basic material is condensed from the melamine powder material so as to form granules, and the melamine-granule basic material and the melamine powder material are mixed and hot pressed together so as to produce the melamine container. Furthermore, a melamine container is hot pressed and contains at least two melamine-granule basic materials, bakelite powders/granules and urea powders/granules; wherein the at least two melamine-granule basic materials are condensed from melamine powder material so as to form granules of at least two colors, and the at least two melamine-granule basic materials are mixed and hot pressed so as to produce a melamine container.
摘要:
A modified novolak phenolic resin is obtained by reacting a novolak phenolic resin containing at least 50 wt % of p-cresol with a crosslinker. This method increases the molecular weight of the existing novolak phenolic resin containing at least 50 wt % of p-cresol to such a level that the resulting modified novolak phenolic resin has heat resistance enough for the photoresist application.
摘要:
Stable dispersions of phenolic resins, particularly bisphenol-A/formaldehyde resins, for use in e.g., baking enamels, coatings, adhesives, binders, etc., are disclosed. The dispersions have low levels (e.g.,
摘要:
Phenol formaldehyde resins that have low free formaldehyde when produced, that maintain their low free formaldehyde levels during storage, and that demonstrate low levels of formaldehyde emissions during processing, curing, and thereafter.
摘要:
A crosslinking agent having reactive benzoxazine groups is provided. The crosslinking agent is an ungelled reaction product of aminoplast resin, a polyhydric aromatic compound, and at least one compound having active hydrogen groups reactive with aminoplast resin which is selected from at least one of: (i) compounds having the structure (I): 1 where X is aromatic; R1, R2, and R3 each independently represents H, (cyclo)alkyl having from 1 to 12 carbon atoms, aryl, alkaryl, aralkyl, or an active hydrogen-containing group; (ii) compounds having structure (II) or (III): 2 where Rnull and Rnull each independently represents an aromatic group or an alkyl group having 1 to 12 carbon atoms; and (iii) compounds different from (i) and (ii) and having a melting point of at least 80null C. Curable powder coating composition and multilayer composite coating compositions are also provided, as well as coated substrates.
摘要翻译:提供了具有反应性苯并恶嗪基团的交联剂。 交联剂是氨基塑料树脂,多元芳族化合物和至少一种具有与氨基塑料树脂反应的活性氢基团的化合物的非凝胶化反应产物,其选自以下至少一种:(i)具有结构(I)的化合物: 其中X是芳香族; R 1,R 2和R 3各自独立地表示具有1至12个碳原子的H((环))烷基,芳基,烷芳基,芳烷基或含活性氢基团; (ii)具有结构(II)或(III)的化合物:其中R'和R“各自独立地表示芳族基团或具有1至12个碳原子的烷基; 和(iii)不同于(i)和(ii)的化合物,并具有至少80℃的熔点。也提供可固化的粉末涂料组合物和多层复合涂料组合物以及涂覆的基材。
摘要:
The present invention provides a flame retardant phenol resin material which includes a phenol condensate, wherein a poly-aromatic compound obtained by a reaction of phenols (A) to aromatics (B) except for phenols and a heterocyclic compound (C) including nitrogen as heteroatom are condensed via aldehydes (D), and also provides a flame retardant epoxy resin material which includes an epoxy resin obtained by glycidyl-etherification of at least a part of phenolic hydroxyl groups of a poly-aromatic compound obtained by a reaction of phenols (A) to aromatics (B) except for phenols and a heterocyclic compound (C) including nitrogen as heteroatom are condensed via aldehydes (D).
摘要:
Disclosed is a stabilized phenolic resin melamine dispersion comprising a liquid alkaline resole resin composition and solid melamine crystal dispersed throughout the resin composition. The liquid alkaline resole resin composition comprises the reaction product of combining formaldehyde and phenol at a formaldehyde to phenol mole ratio of about 0.5:1 to about 3.5:1 in the presence of a basic catalyst. The melamine crystal to phenol mole ratio ranges from about 0.01:1 to about 1:1. Moreover, the composition has a free formaldehyde content of at most about 0.5 weight percent. A method for making this dispersion is also disclosed.
摘要:
There is provided a composition that is the product of mixing and reaction a resole, an alcoholate of an amino triazine, and aldehyde. This composition is useful as a thermosetting resin. This composition is useful as a curative for novolac resins. There is also provided a process for making this composition. In particular there is a process disclosed for making this composition in aqueous solution. Furthermore, curable novolac compositions, and processes for making these compositions, are disclosed and claimed.
摘要:
This invention relates to an emulsifiable melamine-modified phenolic resole resin composition useful as a binder for glass fibers. The invention is more particularly directed to the process of preparing the resole resin composition using an alkaline condensation in the presence of a polyhydroxyl compound.
摘要:
Cured aminoplast resins are recycled by a process in which said resins, which may contain fillers, are treated with an aqueous sulfite, hydrogen sulfite or disulfite solution and the resulting low molecular weight degradation products are used in chemical processes. The resulting low molecular weight degradation products of cured aminoplast resins are used for coating moldings, for tanning leather and skins and for the production of moldings which contain cured aminoplast resins or consist thereof.