Aqueous colloidal dispersions of tertiary amine salts of urea-urethane polymers and method for manufacture
US4203883A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1978 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Sep 5, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31551
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There are disclosed aqueous colloidal dispersions of tertiary amine salts of urea-urethane polymers of triamine-containing polyamines and isocyanate-terminated, urethane prepolymers having carboxylic groups. The urea-urethanes have sufficient tertiary amine neutralized, carboxylic groups to provide stable, aqueous dispersions having infinite dilutability with water, and the solids of the amine-neutralized dispersions are essentially of colloidal size. Carboxylic groups are supplied by polyol reactants employed in making the prepolymers. The colloidal, urea-urethane polymers may be stably dispersed in the aqueous medium, even in the absence of substantial amounts of cosolvents, and are useful in, for instance, coating compositions to provide water-resistant coatings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.