Patent · US Active

Absorbent polymeric foam for shoe insoles

US11078343B2 · kind B2 · utility

0Cited by

4References

7Claims

0Family size

Assignee

Evonik Operations GmbH · DE

Inventors

Steffen Fischer · Krefeld, DE
Diedrich Schmidt · Greensboro, US
Scott J. Smith · Greensboro, US
Xinyuan Yang · Greensboro, US

Key dates

Filing date	Oct 6, 2017
Grant date	Aug 3, 2021
Priority date	—
Expiry date	Jul 15, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2333/02
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The present invention relates to a polymeric foam, and a process for making the polymeric foam comprising the steps of a) providing a monomeric solution consisting of a polymerizable, ethylenically unsaturated monomer containing one or more acid groups, water and one or more crosslinkers having more than one polymerizable group per molecule; b) introducing a blowing agent to the monomer solution; c) treating the monomer solution with an ultrasonic treatment; d) introducing one or more initiation agents to the monomer solution; and e) polymerizing the monomer solution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.