Polyurethane coatings for bridge deckings and the like
US4855185A · kind A · utility
9Cited by
15References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1988 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Jun 15, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31605
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel polyurethane formulations especially useful as membranes for the protection of bridge deckings. The polurethane is prepared by mixing two components, A and B. Component A consists essentially of a low-molecular weight polyol, e.g., glycerol; a poly(oxypropylene) triol; and an elastomer. Component B is a special MDI, either a mix of 4,4'- and 2,4'-isomers of diphenylmethane diisocyanate or a mix of 4,4'-diphenylmethane diisocyanate and its reaction product with a low molecular weight poly(oxypropylene).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.