Polyurethane quaternary ammonium salts

Details Polyurethane quaternary ammonium salts Polyurethane quaternary ammonium salts

1982-03-08

1984-05-29

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 59, 528 65, 528 73, 528 76, 528 80, 528 84, 528 44, 128 82, 128155, 128334R, 128334C, 128130, 128132D, 128156, 424 78, 424 32, 351160R, C08G 1842

Patent

active

044516355

ABSTRACT:
Polyurethane quaternary ammonium salts are obtained by heating a solution of a polyurethane resin characterized by having present in the polymer backbone hydroxyl groups and at least one substituent selected from the group consisting of carboxylate radicals and carboxyl radicals dissolved in a water-miscible organic solvent for the resin at a temperature above 64.degree. C. and below the decomposition temperature of said polyurethane resin with an organic chloride for a period of time; adding a strong base to the reaction mixture and continuing to heat said mixture to form a polyurethane quaternary ammonium hydroxide in solution; and precipitating the polyurethane quaternary ammonium hydroxide by pouring the reaction mixture into an excess of water. The polyurethane quaternary ammonium hydroxide so obtained may be dissolved in a solvent containing sufficient hydrochloric acid to bring the pH of the solution to 8; and the corresponding polyurethane quaternary ammonium chloride may be recovered from solution by evaporation of the solvent at a temperature below the decomposition point of the polyurethane quaternary ammonium chloride. A polyurethane quaternary ammonium sulfate may be prepared by dissolving in sulfuric acid a polyurethane resin characterized by having present in the polymer backbone hydroxyl groups and lactone groups to form a solution. This solution is added to an excess of water with stirring and neutralized with sodium hydroxide to bring the pH of the diluted solution to between 3 and 4. Evaporation of the solvent gives a residue containing a polyurethane quaternary ammonium sulfate and sodium sulfate. The polyurethane quaternary ammonium sulfate may be separated from the mixture by extraction with methanol.

REFERENCES:
patent: 4255550 (1981-03-01), Gould
Organic Chemistry, by Morrison and Boyd, Allyn and Bacon, Inc., Jun. 1980, pp. 738-740 and 752-754.

Affiliated with

Also associated with

Rating

Polyurethane quaternary ammonium salts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyurethane quaternary ammonium salts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyurethane quaternary ammonium salts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1398742