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US 5,670,572 AGranted
Impregnating resins for films and edgings
AssigneeHoechst Aktiengesellschaft
InventorsJurgen Ott, Manfred Schon, Wilhelm Adam, Frank Scholl, Alfons Wolf
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Abstract
The present invention relates to melamine-formaldehyde resins comprising a guanamine, to processes for their preparation and to their use for the production of melamine resin films and edgings.
Claims12
Modified aqueous melamine-formaldehyde resins selected from the group consisting of
- a. melamine-formaldehyde resins which contain at least one guanamine in co-condensed form;
- b. mixtures of at least two resins of group (a);
- c. mixtures of at least one melamine-formaldehyde resin with at least one guanamine;
- d. mixtures of at least one resin of group (a) and a mixture of group (c);
- e. mixtures of at least one resin of group (a) and at least one guanamine;
- wherein the guanamine is selected from 1-alkyl-3,5-diaminotriazines with 5 to 17 carbon atoms in the alkyl group, and wherein the modified melamine-formaldehyde resins are aqueous melamine-formaldehyde impregnating solutions which are at least partially etherified with a C.sub.1 -C.sub.4 alcohol, the molar ratio of alcohol to melamine in the alkoxymethyl melamine being from 0.8:1 to 6:1 and the resin has a solids content of about 60 to about 85% by weight and the molar ratio of melamine:guanamine:formaldehyde is about 1:(about 0.001 to about 0.5):(about 1.3 to about 6).
3 more elements
Dependencies are inferred from the claim text.