Back to results
US 2024/0190052 A1Published application
Novel foaming process for production of foam materials
AssigneeEvonik Operations GmbH
InventorsThomas Richter, Andreas Liebe, Christian Traßl, Florian Becker, Vincent Ma Junyong
Life of this patent
Estimating the term…
Abstract
A production process can produce foam materials from a polymer composition. This production process may involve preheating a polymer composition to be foamed. The preheated composition may then be foamed by a thermal process assisted by microwaves. The foaming may occur in an apparatus that has a heating device. The polymer composition may contain a blowing agent.
Claims12
1-10. (canceled)
A process for producing a foam, the process comprising:
- preheating a polymer composition to be foamed, and foaming the polymer composition containing a blowing agent in an apparatus having a thermal heating device for heating to an internal temperature of the apparatus Ts and irradiating simultaneously the polymer composition by at least one microwave source of the apparatus,
- wherein the polymer composition is preheated in the apparatus at a temperature between a minimum of 80° C. below and a maximum of 10° ° C. above the internal temperature of the apparatus Ts, and
- wherein the temperature differential between a coldest point and a hottest point within the polymer composition after the preheating is not greater than 15ºC.
Dependencies are inferred from the claim text.