Patent ID: 11926729
Assignee: DOW GLOBAL TECHNOLOGIES LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 18:
19. A foam comprising an ionomer, wherein the ionomer comprises a neutralized blend of an ethylene acid copolymer and an aliphatic, mono-functional organic acid, wherein the blend comprises:
from 40 to 95 wt % of the ethylene acid copolymer, based on the total weight of the blend, the ethylene acid copolymer being the polymerized reaction product of:
ethylene, and
from 1 to 25 wt % of monocarboxylic acid, based on the total weight of monomer present in the ethylene acid copolymer; and
from 1 to 40 wt % of softening comonomer, based on the total weight of monomer present in the ethylene acid copolymer;

from 5 to 50 wt % of the aliphatic, mono-functional organic acid, based on the total weight of the blend, wherein the aliphatic, mono-functional organic acid has fewer than 36 carbon atoms;
wherein:
at least 90 mole % of total acid units are neutralized with a cation source comprising (a) a trivalent cation and (b) either a mono- or di-valent cation; and
at least 80 mol. % of the total acid units are neutralized with the trivalent cations.