Claims
- 1. A process for preparing a polyurethane comprising reacting a thioether diol with a polyisocyanate wherein the thioether diol is one produced by reacting a bicyclic amide acetal with hydrogen sulfide at a temperature in the range of from 20.degree. C. to 200.degree. C. wherein the mole ratio of bicyclic amide acetal to hydrogen sulfide is in the range of from about 1:1 to about 2:1.
- 2. The process of claim 1 wherein the bicyclic amide acetal is one of formula ##STR3## wherein R, R', and R" independently represent a member selected from the group consisting of hydrogen, an alkyl group having from 1 to 20 carbon atoms, an aryl group having from 6 to 12 carbon atoms, an alkaryl group having from 7 to 20 carbon atoms, an alkyl ether group having from 1 to 20 carbon atoms.
- 3. The process of claim 2 wherein the bicyclic amide acetal is one in which R and R" are hydrogen and R' is methyl.
- 4. The process of claim 2 wherein the bicyclic amide acetal is one in which R is hydrogen, R' is ethyl and R" is CH.sub.2 OC.sub.6 H.sub.5.
- 5. The process of claim 2 wherein the polyisocyanate is methylene bis(phenyl isocyanate).
Parent Case Info
This is a division of my copending U.S. patent application Ser. No. 264,650, filed Nov. 30, 1988, now U.S. Pat. No. 4,891,416, which in turn is a division of my U.S. patent application Ser. No. 852,588, filed Apr. 16, 1986, now U.S. Pat. No. 4,804,781.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4665229 |
Goel |
May 1987 |
|
4698416 |
Goel et al. |
Oct 1987 |
|
Divisions (2)
|
Number |
Date |
Country |
Parent |
264650 |
Nov 1988 |
|
Parent |
852588 |
Apr 1986 |
|