Urethane elastomer for printing belts and process therefor
US4404353A · kind A · utility
11Cited by
15References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Aug 20, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for making an elastomer for use in printing/drive belts is disclosed wherein a mixture of approximately 2 equivalents of toluene diisocyanate consisting of about 88 wt. % of the 2,4 isomer and 12 wt. % of the 2,6 isomer is reacted with a polyether or polyester having difunctional primary hydroxyl groups to form a prepolymer. The prepolymer is then reacted with a diamine curing agent to form the elastomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.