Liquid coatings for bridge deckings and the like
US4877829A · kind A · utility
18Cited by
23References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | May 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31598
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Novel polyurethane formulations especially useful as membranes for the protection of bridge deckings. The polyurethane is prepared by mixing two components, A and B. Component A comprises castor oil, a low molecular weight polyol having a molecular wieght between 92 and about 200, preferably with an elastomer. Component B is a modified MDI, being either (i) a mix of 4,4'- and 2,4'-isomers of diphenylmethane diisocyanate or (ii) a diphenylmethane diisocyanate and its reaction product with a low molecular weight poly(oxyalkylene).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.