Preparing rigid polyurethane foams
US10472454B2 · kind B2 · utility
0Cited by
3References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 14, 2013 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | May 23, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for preparing rigid polyurethane foams or rigid polyisocyanurate foams by using certain polyetherester polyols B) based on aromatic dicarboxylic acids, optionally further polyester polyols C), which differ from those of component B), and polyether polyols D), wherein the mass ratio of total components B) and optionally C) to component D) is less than 1.6. The present invention also relates to the rigid foams thus obtainable and to their use for producing sandwich elements having rigid or flexible outer layers. The present invention further relates to the underlying polyol components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.