Novel foaming process for production of foam materials
US-2022063153-A1 · Mar 3, 2022 · US
Foaming of blowing agent containing polymers through the use of microwaves
US2022126490A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022126490-A1 |
| Application number | US-201917423152-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 19, 2019 |
| Priority date | Jan 16, 2019 |
| Publication date | Apr 28, 2022 |
| Grant date | — |
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- Title
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Abstract
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(Rigid) foams can be produced by heating a blowing agent containing polymers through the combination of thermal energy with irradiation by microwaves.
First claim
Opening claim text (preview).
1 : A process for producing rigid foams and foams, the process comprising: foaming a polymer composition comprising a blowing agent in an apparatus consisting of a thermal heating means and a microwave, which in combination heat the polymer composition above a glass transition temperature of the polymer composition T gC . 2 : The process for producing rigid foams and foams according to claim 1 , wherein the temperature of the thermal heating means is not more than 30° C. below a glass transition temperature of the polymer T gP before foaming. 3 : The process for producing rigid foams and foams according to claim 1 , wherein the temperature of the thermal heating means is not less than 30° C. below a glass transition temperature of the polymer T gP while simultaneously the temperature of the polymer composition during the foaming corresponds at least to the glass transition temperature of the polymer composition T gC . 4 : The process for producing rigid foams and foams according to claim 1 , wherein the polymer composition is heated at least 5° C. above the glass transition temperature of the polymer composition T gC with microwave irradiation and thermal energy. 5 : The process for producing rigid foams and foams according to claim 1 , wherein the polymer composition is heated at least 10° C. above the glass transition temperature of the polymer composition T gC with microwave irradiation and thermal energy. 6 : The process for producing rigid foams and foams according to claim 1 , wherein the polymer composition is moved relative to a microwave field. 7 : The process for producing rigid foams and foams according to claim 1 , wherein a microwave field is altered relative to the polymer composition. 8 : The process for producing rigid foams and foams according to claim 1 , wherein an ambient temperature in a thermal heating means space is between 100° C. and 250° C.
Assignees
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Classifications
- B29C44/3415Primary
Heating or cooling · CPC title
using microwave · CPC title
using electromagnetic radiation · CPC title
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Frequently asked questions
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- What does patent US2022126490A1 cover?
- (Rigid) foams can be produced by heating a blowing agent containing polymers through the combination of thermal energy with irradiation by microwaves.
- Who is the assignee on this patent?
- Evonik Operations Gmbh
- What technology area does this patent fall under?
- Primary CPC classification B29C44/3415. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Apr 28 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).