Patent ID: 8754185

Claim:
A method for making an amino-aldehyde resin, comprising: mixing an intermediate amino-aldehyde reaction product having a total aldehyde compound to total amino compound molar ratio ranging from about 1.4:1 to about 3:1 with a first aldehyde compound and a first amino compound to produce an amino-aldehyde resin having a total aldehyde compound to total amino compound molar ratio ranging from about 0.5:1 to 1:1,wherein: the intermediate amino-aldehyde reaction product comprises a urea-formaldehyde resin, the first aldehyde compound comprises formaldehyde, the first amino compound comprises urea, the concentration of the first aldehyde compound in the amino-aldehyde resin is about 1.9 wt % or more based on a combined solids weight of the aldehyde compounds and the amino compounds in the amino-aldehyde resin, the concentration of the first aldehyde compound in the amino-aldehyde resin is at least 21 wt % to about 40 wt %, based on the solids weight of the aldehyde compounds in the amino-aldehyde resin, and the intermediate amino-aldehyde reaction product is at a temperature of about 85° C. or less and a pH of about 7.5 or more when the first aldehyde compound and the first amino compound are mixed therewith.