Castor oil based polyurethane for bridge deckings and related applications
US4859735A · kind A · utility
9Cited by
31References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Sep 16, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31598
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel polyurethane formulations especially useful as membranes of the protection of bridge deckings. The polyurethane is prepared by mixing two components, A and B. Component A comprises castor oil modified with a ketone-formaldehyde condensate and also preferably contains an elastomer. Component B is a modified MDI, being a mixture of diphenylmethane diisocyanate and its reaction product with a low molecular weight poly(oxyalkylene).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.