	US 12,473,414 B2
	Foams and method of forming foams of ionomers of copolymers of vinylidene aromatic monomer and unsaturated compounds with acid groups
Claude T. E. Van Nuffel, Oostakker (BE); Abidin Balan, Breda (NL); and Luc Bosiers, Edegem (BE)
Assigned to TRINSEO EUROPE GMBH, Pfaeffikon (CH)
Appl. No. 17/297,679
Filed by TRINSEO EUROPE GMBH, Horgen (CH)
PCT Filed Dec. 3, 2019, PCT No. PCT/EP2019/083442 § 371(c)(1), (2) Date May 27, 2021, PCT Pub. No. WO2020/115025, PCT Pub. Date Jun. 11, 2020.
Claims priority of provisional application 62/774,510, filed on Dec. 3, 2018.
Claims priority of application No. 19199497 (EP), filed on Sep. 25, 2019.
Prior Publication US 2022/0010087 A1, Jan. 13, 2022
Int. Cl. C08J 9/08 (2006.01); C08F 212/08 (2006.01); C08F 220/06 (2006.01); C08J 9/00 (2006.01); C08J 9/12 (2006.01); C08L 25/14 (2006.01)

CPC C08J 9/08 (2013.01) [C08F 212/08 (2013.01); C08F 220/06 (2013.01); C08J 9/0061 (2013.01); C08J 9/122 (2013.01); C08L 25/14 (2013.01); C08F 2810/20 (2013.01); C08J 2201/03 (2013.01); C08J 2203/02 (2013.01); C08J 2203/06 (2013.01); C08J 2203/184 (2013.01); C08L 2203/14 (2013.01); C08L 2205/025 (2013.01); C08L 2312/00 (2013.01)]

10 Claims

1. A foaming composition comprising:

(a) a copolymer of one or more vinylidene aromatic monomers and one or more unsaturated acids, the copolymer having about 0.01 to about 15.0 percent by weight of the one or more unsaturated acids that form acid groups pendant from the copolymer;

(b) a metal salt, metal oxide or combination thereof, the metal salt and metal oxide each having a metal and the metal having a valence of at least 2; and,

(c) a blowing agent, wherein the foaming composition, after melt blending the copolymer, the blowing agent and metal salt, metal oxide or combination thereof, forms a crosslinked polymer crosslinked by reversible ionic bonds and the crosslinked polymer has a melt viscosity at 0.314 s⁻¹angular frequency that is at least 10 percent higher than the copolymer when measured at 200° C. and has a viscosity at 628 s⁻¹angular frequency that is essentially the same as the copolymer, and the metal having a valence of 2 is of the metal salt and the metal is present as metal ions to equivalents of anions of the acid groups pendant from the copolymer at an equivalents ratio of 200:1 to 1:200.