Acoustic damping compositions having elastomeric particulate

摘要

An acoustic damping composition includes a urethane component, elastomeric particles, and a binder resin including an addition polymer having a carboxylic functional group. The acoustic damping composition can have a Mode 1 Damping Parameter of at least 0.45. The binder resin can have a glass transition temperature of not greater than −25° C.

主权项

1. An acoustic damping composition comprising:
a water-based emulsion comprising:
a binder resin including an addition polymer having a carboxylic functional group;a modifying resin immiscible with the binder resin, the modifying resin comprising a urethane component; anda first set of elastomeric particles that decrease the deformability of the acoustic damping composition relative to a same acoustic damping composition absent the first set of elastomeric particles,wherein, when the acoustic damping composition is deployed and dried, the acoustic damping composition has a Mode 1 Damping Parameter of at least 0.45.