US 11,806,970 B2
Multilayer sheets including polyphenylene and polypropylene and methods of making the same (as amended)
Jian Zhou, Evansville, IN (US); Juha-Matti Levasalmi, Delmar, NY (US); and Zhaokang Hu, Newburgh, IN (US)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
Appl. No. 16/474,988
Filed by SABIC Global Technologies, B.V., Bergen op Zoom (NL)
PCT Filed Dec. 26, 2017, PCT No. PCT/US2017/068389
§ 371(c)(1), (2) Date Jun. 28, 2019,
PCT Pub. No. WO2018/125855, PCT Pub. Date Jul. 5, 2018.
Claims priority of provisional application 62/439,718, filed on Dec. 28, 2016.
Prior Publication US 2019/0322089 A1, Oct. 24, 2019
Int. Cl. B32B 27/08 (2006.01); B32B 27/28 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 27/285 (2013.01); B32B 27/302 (2013.01); B32B 27/32 (2013.01); B32B 2307/206 (2013.01); B32B 2307/3065 (2013.01); B32B 2307/71 (2013.01); B32B 2457/08 (2013.01); B32B 2457/10 (2013.01); B32B 2457/12 (2013.01); B32B 2605/10 (2013.01); B32B 2605/18 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A multilayer sheet, comprising:
a core layer comprising a composition comprising about 60 to about 90 weight percent of polyphenylene, about 0 to about 20 weight percent of polystyrene, about 10 to about 20 weight percent of a hydrogenated block copolymer of an alkenyl aromatic compound and a conjugated diene, and optionally, a flame retardant additive;
a first cap layer disposed on a surface of the core layer, wherein the first cap layer comprises polypropylene; a second cap layer disposed on another surface of the core layer, wherein the second cap layer comprises polypropylene
wherein the hydrogenated block copolymer has a weight average molecular weight of 100,000 to 150,000; and wherein the hydrogenated block copolymer of an alkenyl aromatic compound and a conjugated diene comprises a polystyrene-poly(ethylene-butylene) diblock copolymer, a polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymer, a polystyrene-poly(ethylene-butylene-styrene)-polystyrene tapered block copolymer, or a combination comprising at least one of the foregoing; and wherein thermal shrinkage of the multilayer sheet at 150° C. for 30 minutes is less than or equal to 0.5% in the machine direction and less than or equal to 0.4% in the transverse direction.