| 摘要 |
<p>Novel stable-in-use aminoplast resin binder solutions comprising aqueous solutions of predominantly a urea-formalde-hyde resin having a formaldehyde to urea ratio of less than 2.0, from about 12 to 30% by weight dissolved diammonium phosphate or mixture of diammonium phosphate and ammonium polyphosphate and not more than 50% by weight water. Preferred aminoplast resin binder solutions also contain a methylolated melamine-formaldehyde resin. A novel process for the production of the stable aminoplast resin binder solutions containing high percentages of ammonium phosphates and suitable for production of fire-retardant particle board is disclosed.</p> |
