US 12,030,280 B2
Hurricane-resistant acoustic glazing
Rebecca L. Smith, Houston, TX (US); Alejandro Gonzalez, Houston, TX (US); and Stephen J. Bennison, Houston, TX (US)
Assigned to KURARAY EUROPE GMBH, Hattersheim am Main (DE)
Filed by KURARAY EUROPE GMBH, Hattersheim am Main (DE)
Filed on Feb. 4, 2020, as Appl. No. 16/781,787.
Claims priority of provisional application 62/800,646, filed on Feb. 4, 2019.
Prior Publication US 2020/0251082 A1, Aug. 6, 2020
Int. Cl. B32B 27/32 (2006.01); B32B 17/10 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); G10K 11/168 (2006.01)
CPC B32B 17/10743 (2013.01) [B32B 17/10036 (2013.01); B32B 17/10587 (2013.01); B32B 17/10633 (2013.01); B32B 17/10651 (2013.01); B32B 17/10678 (2013.01); B32B 27/08 (2013.01); B32B 27/302 (2013.01); B32B 27/32 (2013.01); G10K 11/168 (2013.01); B32B 2307/102 (2013.01); B32B 2307/306 (2013.01); B32B 2307/712 (2013.01); B32B 2315/08 (2013.01); B32B 2323/04 (2013.01); B32B 2325/00 (2013.01); B32B 2419/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A multilayer polymeric interlayer comprising: a structure of Layer A/Layer B/Layer C; wherein:
(1) Layer A is a layer of a first ionomer resin composition,
(2) Layer C is a layer of a second ionomer resin composition, and
(3) Layer B is an acoustic damping layer between Layer A and Layer C, comprising:
a trilayer structure of Layer B1/Layer B2/Layer B3, wherein Layers B1 and B3 comprise, respectively, a third and a fourth ionomer resin composition, and Layer B2 comprises the acoustic damping resin composition;
wherein:
the Layers A, B1, B2, B3 and C are directly stacked one to another in the order listed,
the first and second ionomer resin compositions comprise a dipolymer consisting essentially of copolymerized units of: (i) ethylene, and (ii) from about 10 wt % to about 30 wt % of at least one α,β-unsaturated carboxylic acid having 3 to 10 carbon atoms, wherein the weight percentages of the copolymerized units are based on the total weight of the ethylene acid copolymer and the sum of the weight percentages of the copolymerized units is 100 wt %, and wherein at least a portion of carboxylic acid groups of the α,β-unsaturated carboxylic acid are neutralized to form an ionomer comprising carboxylate groups having sodium counterions,
the third and fourth ionomer resin compositions comprise a terpolymer of copolymerized units of: (i) ethylene, (ii) from about 10 wt % to about 30 wt % of at least one α,β-unsaturated carboxylic acid having 3 to 10 carbon atoms, (iii) from about 2 wt % to about 15 wt % of at least one α,β-unsaturated carboxylic acid ester having 3 to 10 carbon atoms, and (iv) optionally a derivative of an α,β-unsaturated carboxylic acid other than (iii) in an amount such that (iii)+(iv) is 15 wt % or less, wherein the weight percentages of the copolymerized units are based on the total weight of the ethylene acid copolymer and the sum of the weight percentages of the copolymerized units is 100 wt %,
each of Layers A and C is individually from about 0.5 mm to about 2.5 mm thick; and
the multilayer polymeric interlayer is from about 2 mm to about 5 mm thick.