Amino-formaldehyde resins prepared by condensation polymerisation of formaldehyde, glycerin, urea and / or melamine

摘要

Disclosed is an amino-formaldehyde resin prepared using a formulation comprising, under condensation reaction conditions, formaldehyde, glycerine and at least one compound selected from the group consisting of urea, melamine, and mixtures thereof; if the at least one compound is urea, then the urea is present in a final molar ratio of formaldehyde to urea ranging from about 0.70 to about 1.30; if the at least one compound is melamine, then the melamine is present in a final molar ratio of formaldehyde to melamine ranging from about 1.3 to about 2.2; and if the at least one compound is a mixture of urea and melamine, then the mixture of urea and melamine is present in a final molar ratio of formaldehyde to urea and melamine ranging from about 0.35 to about 1.3; and wherein the amino-formaldehyde resin comprises a glycerin modified amino-formaldehyde resin prepared by introducing the glycerin using a front end or split addition process; and wherein the amino-formaldehyde resin is prepared in a substantial absence of a sulfonating agent, ethylene glycol, and polyalkylene glycols. Further disclosed is an article of manufacture (such as a particle board) which comprises a cellulosic substrate and an amino-formaldehyde resin, wherein the amino-formaldehyde resin functions to adhere the substrate together into or within the article of manufacture; and the amino-formaldehyde resin is prepared using the above formulation.