Amino-formaldehyde resins and applications thereof
View Patent ↗Amino-formaldehyde resins, articles of manufacture from the amino-formaldehyde resins, and processes for making the resins and articles are provided herein. In one embodiment, the amino-formaldehyde resins may be prepared using a reaction mixture including formaldehyde, a monohydroxy cyclic compound, and at least one amino compound selected from the group consisting of urea, melamine, and mixtures thereof. In another embodiment, the amino-formaldehyde resins are produced by reacting formaldehyde, a monohydroxy cyclic compound, and at least one amino compound selected from the group consisting of urea, melamine, and mixtures thereof, and the monohydroxy cyclic compound may be added as a front addition, an intermediate addition, a back addition, or a combination thereof, to the reaction mixture of formaldehyde and the at least one amino compound.
1. An amino-formaldehyde resin prepared using a reaction mixture comprising:
formaldehyde;
a monohydroxy cyclic compound selected from the group of monohydroxy cyclical acetals, monohydroxy cyclical ketals, and combinations thereof; and
at least one amino compound selected from the group consisting of urea, melamine, and mixtures thereof.
2. The amino-formaldehyde resin of claim 1 , wherein the monohydroxy cyclic compound is a monohydroxy heterocyclic compound.
3. The amino-formaldehyde resin of claim 2 , wherein the monohydroxy cyclic compound is selected from the group of glycerol formal, 2,2-dimethyl-1,3-dioxolane-4-methanol, and combinations thereof.
4. The amino-formaldehyde resin of claim 1 , wherein the monohydroxy cyclic compound is present at a concentration from about 0.5 to about 15 weight percent of the reaction mixture.
5. The amino-formaldehyde resin of claim 1 , wherein the reaction mixture further comprises one or more organic compounds.
6. The amino-formaldehyde resin of claim 1 , wherein the amino-formaldehyde resin is an urea-formaldehyde resin, a melamine-formaldehyde resin, a melamineurea-formaldehyde resin, or a combinations thereof.
7. The amino-formaldehyde resin of claim 1 , wherein the amino-formaldehyde resin has surface tension from about 35 mN/m to about 50 mN/m.
8. The amino-formaldehyde resin of claim 1 wherein the amino-formaldehyde resin is prepared by introducing the monohydroxy cyclic compound using a back addition, a front addition, an intermediate addition, or combinations thereof.
9. The amino-formaldehyde resin of claim 1 wherein the monohydroxy cyclic compound is formed by reacting an aldehyde, a ketone, or combinations thereof, with a triol having at least two hydroxyl groups located on adjacent carbon atoms or two hydroxyl groups located on two carbon atoms with one carbon between the two carbon atoms with the hydroxyl groups.