US 9,809,010 B2
Multilayer interlayer having sound damping properties over a broad temperature range
Jun Lu, East Longmeadow, MA (US); and Wenjie Chen, Amherst, MA (US)
Assigned to Solutia Inc., St. Louis, MI (US)
Filed by SOLUTIA INC., St. Louis, MO (US)
Filed on Oct. 13, 2015, as Appl. No. 14/882,317.
Application 14/882,317 is a continuation in part of application No. 14/514,641, filed on Oct. 15, 2014, granted, now 9,355,631.
Prior Publication US 2016/0107424 A1, Apr. 21, 2016
Int. Cl. B32B 27/08 (2006.01); B32B 7/02 (2006.01); B32B 27/36 (2006.01); B32B 27/42 (2006.01); B32B 27/22 (2006.01); B32B 27/30 (2006.01); B60J 1/20 (2006.01); E06B 5/12 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 7/02 (2013.01); B32B 27/22 (2013.01); B32B 27/30 (2013.01); B32B 27/306 (2013.01); B32B 27/308 (2013.01); B32B 27/36 (2013.01); B32B 27/365 (2013.01); B32B 27/42 (2013.01); B60J 1/2094 (2013.01); E06B 5/12 (2013.01); B32B 2250/24 (2013.01); B32B 2270/00 (2013.01); B32B 2307/102 (2013.01); B32B 2307/536 (2013.01); B32B 2307/56 (2013.01); B32B 2419/00 (2013.01); B32B 2605/006 (2013.01)] 20 Claims
 
1. A polymer interlayer having improved sound insulation, the polymer interlayer comprising:
a stiff layer comprising a poly(vinyl butyral) resin composition and a plasticizer; and
a soft layer comprising a poly(vinyl butyral) resin composition and a plasticizer, wherein the soft layer has a dispersity in composition of at least 0.40; and
wherein the polymer interlayer has a damping loss factor (η) (as measured by Mechanical Impedance Measurement according to ISO 16940) of at least about 0.15 measured at two or more different temperatures selected from 10° C., 20° C. and 30° C.