Polyquaternium-1 synthesis methods
View Patent ↗The present embodiments relate to a novel method of making quaternary ammonium polymers comprising the steps of: a) mixing 1,4-bis-dimethylamino-2-butene, triethanolamine, water and an acid; and b) introducing a 1,4-dihalo-2-butene to the mixture so as to initiate a reaction resulting in the quaternary ammonium polymer.
1. A method of making Polyquaternium-1 at a yield of at least about 50% comprising the steps of:
a) mixing 1,4-bis-dimethylamino-2-butene, triethanolamine and an acid;
b) introducing a 1,4-dihalo-2-butene to the mixture and
c) isolating Polyquaternium-1 having a molecular weight of about 9300 or more, at a yield of at least about 50%.
2. The method of claim 1 , wherein the acid is selected from the group consisting of HCl, H 2 SO 4 and H 3 PO 4 .
3. The method of claim 1 , wherein the 1,4-dihalo-2-butene is 1,4-dichloro-2-butene.
4. The method of claim 1 , wherein the acid is HCl.
5. The method of claim 1 , further comprising the step of introducing water into the mixture.
6. The method of claim 1 , wherein the 1,4-bis-dimethylamino-2-butene, triethanolamine and acid are mixed before the addition of the 1,4-dichloro-2-butene.
7. The method of claim 1 , wherein the 1,4-dichloro-2-butene is added drop-wise.
8. The method of claim 1 , wherein the molar ratio of 1,4-bis-dimethylamino-2-butene to triethanolamine is from about 10:1 to about 1:5.
9. The method of claim 1 , wherein the molar ratio of triethanolamine to acid is from about 10:1 to about 1:10.
10. The method of claim 1 , wherein the molar ratio of 1,4-bis-dimethyhtmino-2-butene to triethanolamine to acid is from about 10:9:5 to about 10:9:8.
11. The method of claim 1 , wherein the reaction temperature is from about 10° C. to about 90° C.
12. The method of claim 1 , wherein the reaction time is from about 1 hour to about 40 hours.