Acrylic damping glue and voice diaphragm for loudspeaker

The invention provides acrylic damping glue. The acrylic damping glue comprises a cross-linked structure of a carboxyl-containing acrylic polymer with the glass transition temperature smaller than or equal to -20 DEG C and a carboxyl-containing acrylic polymer with the glass transition temperature within the range of 20-50 DEG C. According to the technical scheme, the acrylic damping glue shows double damping peaks in a rheological curve, so that the acrylic damping glue has a wide damping temperature range (the damping temperature range is larger than or equal to 50 DEG C, preferably larger than or equal to 90 DEG C) and high damping responsiveness along with frequency, and has high system stability. 本发明提供一种丙烯酸类阻尼胶，所述丙烯酸类阻尼胶包含玻璃化转变温度小于或等于-20℃的含羧基的丙烯酸类聚合物与玻璃化转变温度在20℃-50℃范围内的含羧基的丙烯酸类聚合物的交联结构。根据本发明的技术方案的丙烯酸类阻尼胶在流变曲线中表现出双阻尼峰，由此具有较宽的阻尼温域(阻尼温域大于或等于50℃，优选大于或等于90℃)和较高的阻尼随频率的响应性，并且具有较高的体系稳定性。