摘要:
A diguanamine represented by general formula (1); a process for producing the same by the reaction of a dicarbonitrile represented by the general formula: NC-R-CN with dicyandiamide in the presence of a basic catalyst; and a thermosetting composition comprising, for example, a coating resin containing methylolated diguanamine, etherified diguanamine, precondensates thereof and derivatives thereof, and a thermosetting resin composition comprising, for example, a coating resin or an adhesive resin containing the diguanamine and an epoxy resin. In said formulae, R represents bicyclo[2.2.1]-2,5-heptylene, bicyclo[2.2.1]-2,6-heptylene or cyclohexylene.
摘要:
Provided by the present invention as molding and expansion-forming compositions having excellent properties are thermosetting molding compositions comprising an amino resin and a reinforcing material and thermosetting expansion-forming composition comprising the amino resin, an emulsifier, a foaming agent and a curing agent. The amino resin has been obtained by reacting a specific diguanamine, led by 2,5/2,6-bis (4,6-diaminol-1,3,5-triazin-2-yl)bicyclo[2.2.1]heptane or 1,3/1,4-bis(4,6-diaminol-1,3,5-triazin-2-yl)cyclohoezane, or a derivative thereof with an aldehydeh.
摘要:
A method for the manufacture of an methylolated cyclohexanecarboguanamine by subjecting cyclohexanecarboguanamine to the methylolating reaction with a formaldehyde while keeping the amount of an alcohol present during the process of methylolating reaction below 20% by weight based on the amount of said formaldehyde and keeping the pH value of the reaction system in the range of 8 to 13 and the temperature thereof in the range of 50° to 80°C between the time said reaction is started and the time said reaction is completed.
摘要:
An amino compound of formula (I): wherein R₁, R₂, R₃, R₄, R₅, R₆, R₇ and R₈ are independently -H, -CH₂OH or -CH₂OCH₃, with the proviso that not all of R₁ through R₈ are simultaneously hydrogen.
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung von veretherten oder nichtveretherten Aminoplastharzen. Aminotriazine der allgemeinen Formel (I) worin X für Wasserstoff, einen Alkylrest, einen Phenylrest, einen Alkylphenylrest oder für den Rest -NH 2 steht, werden mit einem β-Hydroxialdehyd der allgemeinen Formel (II) worin R', R" und R"' untereinander gleich oder verschieden sind und für Wasserstoff oder eine Alkylgruppe stehen oder R" bzw. R"' zusammen mit dem a-Kohlenstoffatom einen Cyclopentan- oder Cyclohexanring bilden sowie R" und/oder R"' außerdem für einen Hydroxialkylrest und R" für einen Phenylrest stehen können, umgesetzt, wobei im Falle der Herstellung der veretherten Aminoplastharze die Umsetzung in Gegenwart mindestens eines Alkohols und eines sauren Katalysators, im Falle der Herstellung der nichtveretherten Aminoplastharze die Umsetzung in Gegenwart oder Abwesenheit eines sauren Katalysators durchgeführt wird. Die erfindungsgemäß hergestellten Aminoplastharze eignen sich als Lackrohstoffe.
摘要:
The invention relates to a crosslinker composition comprising a reaction product of a cyclic urea U and a multifunctional aliphatic aldehyde A , and at least one crosslinker selected from the group consisting of reaction products of an aminotriazine and at least one aldehyde selected from the group consisting of aliphatic monoaldehydes and multifunctional aliphatic aldehydes having the structure Y(CHO) n , where Y is an n-functional aliphatic residue, and n is greater than 1; reaction products of urea and/or cyclic ureas and aliphatic monoaldehydes; alkoxycarbonylaminotriazines; multifunctional isocyanates which may be partially or completely blocked; reaction products of phenols and aliphatic monoaldehydes; multifunctional epoxides; multifunctional aziridines; and multifunctional carbodiimides, wherein any of the crosslinkers which have hydroxyl groups may be etherified with one or more linear, branched, or cyclic aliphatic alcohols.
摘要:
A crosslinking agent is provided, prepared by reacting (A) an aminoplast resin; (B) a reactive urethane group-containing adduct of a polyfunctional polymer and monoisocyanate, and (C) at least one other compound having active hydrogen groups reactive with aminoplast resin (A). Compound (C) is selected from: (i) compounds having the structure (I): wherein X is aromatic; R?1, 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 the structure (II) or (III): where R' and R' each independently represents an aromatic group or an alkyl group having 1 to 12 carbon atoms; and (iii) compounds different from (i) and (ii), having a melting point of at least 80°C. Further provided are methods for preparing the crosslinking agent, curable compositions containing the crosslinking agent, and coated substrates.
摘要:
Die vorliegende Erfindung betrifft Melamin-Formaldehyd-Harze, die ein Guanamin enthalten, Verfahren zu ihrer Herstellung und ihre Verwendung zur Herstellung von Melaminharzfolien und -kanten.