摘要:
The invention relates to a coating composition comprising a reaction product UA of at least one multifunctional aldehyde A with at least one cyclic urea U, and a crosslinkable resin having at least one kind of functional groups selected from the group consisting of hydroxyl functional groups, acid functional groups, amide functional groups, amino functional groups, imino functional groups, mercaptan functional groups, phosphine functional groups, and carbamate functional groups, characterised in that the degree of etherification, measured as the ratio «(-0-R) / «(U) of the amount of substance n(-O-R) of alkoxy groups as substituents of the aldehyde carbon atoms of the multifunctional aldehyde chemically bound in the reaction product UA to the amount of substance «(U) of cyclic urea U chemically bound in the reaction products, is less than 0.01 mol/mol, and to a process for the preparation of the reaction product UA.
摘要:
Condensation compounds obtained by means of the polymerization of polyaminic compositions essentially constituted by derivatives of 2,4,6-triamino-1,3,5-triazine having the general formula (I):
摘要:
The invention relates to a reaction product UA of at least one cyclic urea U and at least one multifunctional aldehyde A which reaction product has as substituents on the carbonyl carbon atoms of the aldehyde A at least one kind of functional groups selected from the group consisting of hydroxyl groups -OH and alkoxy groups -OR characterised in that the groups - OR comprise at least two kinds of alkoxy groups -OR 1 and -OR 2 , where R 1 and R 2 are both selected from the group consisting of linear, branched or cyclic alkyl groups having from one to twelve carbon atoms, where R 1 and R 2 may be the same or may be different from each other, to a process of making these, and to a method of use as crosslinker in coating compositions.
摘要:
A composition contains (A) one or several aromatic sulphonates; (B) one or several aldehyde resins; and (C) a buffer. Also disclosed is the preparation of this composition and its use for treating, in particular neutralising, leather tanned with compounds containing or free from mineral substances.
摘要:
This invention relates to a process to make a reaction product UA of at least one multifunctional aldehyde A with at least one cyclic urea U, by mixing the at least one multifunctional aldehyde A with the at least one cyclic urea U in the presence of at least one alcohol R 1 -OH, and optionally, at least one solvent that has no reactive groups which may react with aldehyde groups, -CO-NH- groups, or hydroxyl groups, to effect an addition reaction to obtain a solution of a product UA, where R 1 is selected from the group consisting of linear, branched or cyclic alkyl groups having from one to twelve carbon atoms, to the reaction product obtained by this process, and to a method of use thereof as crosslinker for coating compositions.
摘要:
- Procédé de fabrication de résines aminoplastes selon lequel on ajoute à la résine aminoplaste du ureïdo 2 diamino - 4,6 triazine - 1, 3, 5 et éventuellement de la mélamine. - Procédé selon lequel la quantité de ureïdo - 2 diamino - 4,6 triazine - 1, 3, 5 est au plus égale à 10 % en poids. - Application à la fabrication de panneaux de particules.
摘要:
Summary The invention relates to a coating composition comprising a reaction product UA of at least one multifunctional aldehyde A with at least one cyclic urea U , and a crosslinkable resin having at least one kind of functional groups selected from the group consisting of hydroxyl functional groups, acid functional groups, amide functional groups, amino functional groups, imino functional groups, mercaptan functional groups, phosphine functional groups, and carbamate functional groups, characterised in that the degree of etherification, measured as the ratio n (-O-R) / n (U) of the amount of substance n (-O-R) of alkoxy groups as substituents of the aldehyde carbon atoms of the multifunctional aldehyde chemically bound in the reaction product UA to the amount of substance n (U) of cyclic urea U chemically bound in the reaction products, is less than 0.01 mol/mol, and to a process for the preparation of the reaction product UA .