Blowing agent solubility in polymers
US7060736B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2003 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | May 7, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J9/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The selection of additives to improve the solubility of blowing agents may be facilitated by using a method that involves determining and comparing the activity coefficients of prospective additives to the activity coefficients of candidate blowing agents in a given base polymer for producing a polymeric foam article. The method for the selection of an additive may comprise selecting a representative compound for the base polymer and determining a first activity coefficient for a blowing agent in the representative compound. Also selected are several candidate additives, each having a different functional group, and determining a second activity coefficient for the blowing agent in each of the candidate additives. Among the candidate additives is selected the additive, wherein the second activity coefficient is lower than the first activity coefficient. The method may be incorporated into a process for forming polymeric foams and the manufacture of a polymeric foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.