Foam insulation made with expandable microspheres and methods
US7230036B2 · kind B2 · utility
9Cited by
8References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 2002 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Feb 5, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2987
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyurethane and/or polyisocyanurate foam is made using expandable microspheres which encapsulate a primary blowing agent. By expanding during the foam making process, the microspheres function as a blowing agent. The foam preferably has at least 10% by weight expandable micro spheres which encapsulate a non-halogenated hydrocarbon chemical or a non-halogenated hydrocarbon chemical blend and less than 2% by weight of any non-encapsulated blowing agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.