BINDER COMPOSITION FOR GLASS WOOL OR ROCK WOOL HEAT INSULATION MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a binder which can perfectly cure in a low-temperature region and requires a small quantity of heat when it is cured by incorporating a cure accelerator being sodium carbonate in a water-soluble phenolic resin containing and urea. ;SOLUTION: There is provided a binder composition prepared by adding 0.5-5 pts.wt. sodium carbonate as a cure accelerator to 100 pts.wt. solid matter of a urea-modified phenolic resin premix solution prepared by mixing a water-soluble phenolic resin with urea in a solid matter ratio of 50/50 to 100/1, and subjecting the mixture to a premix reaction at 25-40°C for a specified time. A specified amount of this composition is sprayed onto a glass wool or rock wool heat insulation material, and the assemblage is cured by heating at 200-220°C with e.g. hot press. The water-soluble phenolic resin is produced by mixing 1 mol of phenol with 1-5 mol of formaldehyde, adjusting the reaction system to a pH of 7.5-12.0 by the addition of a basic catalyst, and reacting the reaction system at 50-100°C for a specified time.;COPYRIGHT: (C)1999,JPO