Patent ID: 8604109

Claim:
An aqueous binder for an inorganic-fiber heat-insulating sound-absorbing member, comprising: an acrylic resin having an acid value of 350 to 850 mg KOH/g; a cross-linking agent comprising one or more types of an alkanolamine; and an ammonium salt of an inorganic acid, wherein the aqueous binder comprises the 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 the acrylic resin and the cross-linking agent; a molar 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 is adjusted to 5.0 to 8.0 using a basic compound.