Rigid polyurethane foam having excellent insulating properties and method for preparing the same
US9181411B2 · kind B2 · utility
0Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2010 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Apr 2, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides rigid polyurethane foam comprising thermally expandable particles which are displaced to penetrate a strut of a structure of the polyurethane foam so that the particles are exposed into one or more cells of the polyurethane foam during foaming. Further, the rigid polyurethane foam can comprise hollow thermally expanded particles which are displaced to penetrate a surface of a cell in the polyurethane foam so that the particles are exposed into one or more cells of the polyurethane foam during foaming. The rigid polyurethane of the present invention can have excellent insulating properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.