Polytetramethylene ether urethane cured with 2,2'-diaminodiphenyl disulphide
US4017464A · kind A · utility
7Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 5, 1976 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Feb 5, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/4854
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polytetramethylene ether urethane having improved physical properties is produced by reacting polytetramethylene ether polyol with a toluene diisocyanate containing at least 50 percent 2,4 isomer, reacting at a temperature no greater than about 40.degree. C. to produce a prepolymer and curing the prepolymer with 2,2'-dithio dianiline having the formula ##STR1## at a temperature of 105.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.