AQUEOUS BINDER FOR INORGANIC FIBER HEAT-INSULATING SOUND-ABSORBING MEMBER, INORGANIC FIBER HEAT-INSULATING SOUND-ABSORBING MEMBER AND METHOD FOR PRODUCING INORGANIC FIBER HEAT-INSULATING SOUND-ABSORBING MEMBER

摘要

There is provided an aqueous binder for an inorganic-fiber heat-insulating sound-absorbing member, as well as an inorganic-fiber heat-insulating sound-absorbing member and a method for producing the inorganic-fiber heat-insulating sound-absorbing member in which the aqueous binder is employed, where heat curing can be performed at a low temperature, and a strong binder cured product is obtained. The aqueous binder contains an ammonium salt of an inorganic acid in an amount of 5.5 to 10 parts by mass relative to a total of 100 parts by mass of an acrylic resin having an acid value of 350 to 850 mg KOH/g and a cross-linking agent containing at least one or more types of an alkanolamine; the ratio of the total number of moles of hydroxyl groups, amino groups, and imino groups in the cross-linking agent to the number of moles of carboxyl groups in the acrylic resin is 0.8 to 1.5; and the pH being adjusted to 5.0 to 8.0 using a basic compound. The aqueous binder is applied to an inorganic fiber and heated at 180 to 220°C, and the inorganic-fiber heat-insulating sound-absorbing member is produced.