Processing aids for use in manufacture extruded polystyrene foams using low global warming potential blowing agents
US10676581B2 · kind B2 · utility
0Cited by
23References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2017 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Mar 12, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2325/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A foamable polymeric mixture is provided that includes a polymer composition and at least one blowing agent. The blowing agent may comprise any blowing agents known not to deplete the ozone or increase the prevalence of global warming, such as CO2, HFO, HFC and mixtures thereof. The foamable polymeric mixture may further includes at least one processing aid comprising an organic phase changing material. The inventive foamable mixture is capable of processing at a pressure range of 800 to 1200 psi (5.5 to 8.3 MPa).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.