Bituminous composition
US4032355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1975 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Nov 14, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/29
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel bituminous compositions are disclosed which are characterized by elevated Ring and Ball softening points ranging up to about 200.degree. C. They are prepared by the treatment of molten bitumen, in the absence of solvent, with a combination of: (a) an amine selected from the class consisting of an aliphatic amine having from 10 to 20 carbon atoms, and aromatic polyamines; and (b) an isocyanate selected from the class consisting of aliphatic isocyanates having from 10 to 20 carbon atoms, and aromatic polyisocyanates; provided that in any instance in which the amine component is aliphatic, then the isocyanate component is aromatic. The combined weight of (a) and (b) present in the bitumen, is from about 1 to about 10 weight percent based on the weight of bitumen. The bituminous compositions are useful in paving, and roofing applications, especially in countries which experience hot climates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.