Preparation of electrolyte-free aminoplast resins
AssigneeCassella Aktiengesellschaft
InventorSteffen Piesch
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Abstract
Electrolyte-free etherified methylolaminotriazines are directly prepared by reacting together in the absence of electrolyte, the aminotriazine, formaldehyde and certain ether-alcohols. When the formaldehyde to aminotriazine mol ratio is sufficiently high and the etherification sufficiently extensive, the resulting products are particularly desirable in that they are quite stable and thermoset to exceptionally elastic, cured products having high electrical, moisture, and temperature resistance.
Claims12
A process for the manufacture of an electrolyte-free etherified methylolaminotriazine, wherein in the absence of electrolyte the aminotriazine is condensed with from about 1.3 mols to 2 n mols of formaldehyde per mol of aminotriazine where n is the number of amino groups in the aminotriazine, in an excess of etherifiying alcohol having the formula
- R--(OCH.sub.2 CH.sub.2).sub.m OH
- r denoting an alkyl group with 1 to 4 C atoms and m representing an integer from 1 to 4, by heating such a condensation mixture having a water content of not over about 10% by weight to from about 50.degree. to about 180.degree. C. until the condensation has taken place and the degree of etherification is at least about 33%.
Dependencies are inferred from the claim text.