Improved amino resin performance with sulfonated lignin

A method for making a resin system, comprising:

• a urea-formaldehyde (UF) resin or melamine-urea-formaldehyde (MUF), prepared by:
• mixing one or more urea compounds, one or more formaldehyde compounds, a buffering and stabilizing agent and optionally one or more melamine compounds to form a mixture, optionally heating while mixing for at least one minute to form a UF resin or MUF resin, wherein the UF resin or MUF resin has a molar ratio (MR) of total moles formaldehyde to total moles urea plus, if present, the one or more melamine compounds of from about 0.25:1 to about 2.50:1, and
• if a pH of the UF resin or MUF resin is not 6.5 to about 10.0, then one or more alkaline compounds or acidic compounds are mixed with the UF resin or MUF resin until the pH is 6.5 to about 10.0 to form the resin system,
• wherein one or more lignosulfonate compounds are added to the mixture or are added to the formed UF resin or MUF resin in an amount of from about 0.1 wt. % to about 30 wt. %, based on a total weight of the resin system,
• about 0.0 wt. % to about 40 wt. % of water, based on the total weight of the resin system, and
• wherein the resin system has a buffer capacity of 2-400 mL of 0.1 N HCl by the ATV Method for a period of time of at least about 20 days at 25° C.