Claims
- 1. A carbamated poly(vinyl alcohol) which comprises 15 to 100 mole percent of recurring units having the formula ##STR10## wherein R is NH.sub.2 in some recurring units and at least one of OR.sup.1 and NHR.sup.1 in the remaining recurring units, wherein the units which contain OR.sup.1 and NHR.sup.1 are derived by reaction of said units wherein R is NH.sub.2 with R.sup.1 OH, R.sup.1 OH being an alcohol which has a boiling point of greater than 100.degree. C. at normal atmospheric pressure, with the proviso that said alcohol is compatible with said carbamated poly(vinyl alcohol), and the ratio of (OR.sup.1 +NHR.sup.1)/NH.sub.2 is within the range of 0.05 to 1.0, and 0 to 85 mole percent of recurring units having a formula selected from the group consisting of ##STR11## with the proviso that no more than 12 mole percent of the recurring units have the formula ##STR12##
- 2. The carbamated poly(vinyl alcohol) of claim 1 wherein 30 to 50 mole percent of the recurring units have the formula ##STR13## the ratio of (OR.sup.1 +NHR.sup.1)/NH.sub.2 is within the range of 0.1 to 0.3, and 50 to 70 mole percent of recurring units have a formula selected from the group consisting of ##STR14##
CROSS-REFERENCE TO RELATED APPLICATION
This is a division of copending application Ser. No. 042,943 filed on May 29, 1979, U.S. Pat. No. 4,247,624.
US Referenced Citations (14)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1351475 |
May 1974 |
GBX |
1416440 |
Dec 1975 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
42943 |
May 1979 |
|