Patent ID: 8088446

Claim:
A method for improving acoustic dampening properties of sheets, comprising: (i) applying to the sheets an acoustic sealant composition consisting essentially of: (a) from about 20% to about 80% by weight of a polymeric component selected from the group consisting of acrylic polymers, cured epoxy resins, and mixtures thereof; (b) from about 5% to about 60% by weight of a dibenzoate plasticizer; and (c) from about 15% to about 65% by weight of additives selected from the group consisting of fillers, organic diluents, pigments, adhesion promoters, and combinations thereof; wherein the sealant composition includes less than 2% by weight water and the weight ratio of the polymeric component to a total plasticizer amount is at least 0.8; (ii) heat treating the sheet at a temperature in the range of from 100° C. to 220° C. for a time period of from 1 minute to 2 hours; and (iii) cooling the sheets to ambient temperature.