Patent ID: 8088881

Claim:
A method for preparing a melamine-urea-formaldehyde resin comprising a first cook stage, a second cook stage, and a final addition wherein: the first cook stage comprises adding at least formaldehyde and melamine to form a first cook stage molar ratio of formaldehyde to urea and melamine (F:U+M) from about 2.0 to about 5.0; the second cook stage comprises adding at least urea to form a second cook stage molar ratio of formaldehyde to urea and melamine (F:U+M) from about 1.5 to 3.0; and the final addition comprises adding at least urea to form a final addition molar ratio of formaldehyde to urea and melamine (F:U+M) from about 0.4 to 0.7.