Amphoterics as emulsifiers for bituminous emulsions
US4494992A · kind A · utility
39Cited by
27References
3Claims
0Family size
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Key dates
| Filing date | Jan 18, 1984 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | Jan 18, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2395/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel amphoteric emulsifiers are disclosed for solventless and solvent containing mixing grade, oil-in-water anionic and cationic bituminous emulsions, which emulsifiers are the modified reaction products of polyamines with certain polycarboxylic acids and sulfonated carboxylic acids. Modifications are carried out by reacting the nitrogen-containing intermediates with formaldehyde and sodium sulfite or bisulfite, chloroalkane sulfonic acid salts, .gamma.-propane sultone, chloroalkane phosphonic acids, acrylic acid, fumaric acid, maleic acid and chloroethanoic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.