US 11,981,811 B2
Use of thermoplastic polyurethane and impact resistant composite laminate
Chiu-Peng Tsou, Taichung (TW); Zhen-Wei Chen, Taichung (TW); Ting-Ti Huang, Taichung (TW); and Sheng-Mao Tseng, Taichung (TW)
Assigned to SUNKO INK CO., LTD., Taichung (TW)
Filed by SUNKO INK CO., LTD., Taichung (TW)
Filed on Mar. 8, 2022, as Appl. No. 17/689,399.
Claims priority of application No. 110136540 (TW), filed on Sep. 30, 2021.
Prior Publication US 2023/0104699 A1, Apr. 6, 2023
Int. Cl. C08L 75/08 (2006.01); B32B 5/18 (2006.01); B32B 5/26 (2006.01); B32B 27/40 (2006.01); B32B 37/10 (2006.01); D01D 5/08 (2006.01)
CPC C08L 75/08 (2013.01) [B32B 5/18 (2013.01); B32B 5/265 (2021.05); B32B 27/40 (2013.01); B32B 37/10 (2013.01); D01D 5/08 (2013.01); B32B 2250/03 (2013.01); B32B 2262/0292 (2013.01); B32B 2307/558 (2013.01); B32B 2307/732 (2013.01); B32B 2571/00 (2013.01); D10B 2331/10 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An impact resistant composite laminate comprising a base layer and a first impact resistant layer overlapping the base layer; wherein the first impact resistant layer is formed by a thermoplastic polyurethane; wherein the thermoplastic polyurethane comprises a structural unit represented by Formula (I):

OG Complex Work Unit Chemistry
in Formula (I), wherein each R independently is an alkylene group having 2 to 8 carbon atoms or CH2CH2OCH2CH2;
n is a number from 2 to 13;
the structural unit has a number-average molecular weight ranging from 700 g/mole to 2500 g/mole;
the thermoplastic polyurethane comprises a structural unit represented by Formula (II):

OG Complex Work Unit Chemistry
in Formula (II), each R1 in Formula (II) corresponds to R in Formula (I):
R2 is

OG Complex Work Unit Chemistry
 and n in Formula (II) is the same as n in Formula (I); and
wherein the first impact resistant layer has a thickness of larger than 2 millimeters and smaller than or equal to 10 millimeters;
wherein the base layer comprises a foam elastomer, a fiberglass layer or any combinations thereof;
wherein when the base layer comprises the foam elastomer, the material of the foam elastomer comprises ethylene-vinyl acetate or thermoplastic vulcanizate comprising ethylene propylene diene monomer, and the base layer has a thickness ranging from 2 millimeters to 18 millimeters;
when the base layer comprises the fiberglass layer, the fiberglass layer is a glass fiber prepreg with a moisture-cured reactive polyurethane resin, and the base layer has a thickness ranging from 1 millimeter to 7 millimeters.