Claims
- 1. A method for the preparation of a solution polymer of diallyl dimethyl ammonium halides, said polymer being prepared from an aqueous monomer solution of diallyl dimethyl ammonium halide containing suspended therein 9.0-20.0% by weight of a water soluble alkali metal halide salt and 25-50% by weight of diallyl dimethyl ammonium halide which comprises the steps of:
- A. purging said monomer solution;
- B. heating said monomer solution to a temperature of 120.degree.-180.degree. F.;
- C. adding to said monomer solution a free radical catalyst;
- D. polymerizing said monomer solution under free radical forming conditions so as to prepare a polymer of dially dimethyl ammonium chloride in an aqueous solution;
- E. cooling said polymer in aqueous solution while adding water is necessary to solubilize any of said salt contained in said solution.
- 2. A method for the preparation of a solution polymer of diallyl dimethyl ammonium chloride said polymer being prepared from an aqueous monomer solution of dially dimethyl ammonium chloride containing therein 9.0-20.0% by weight of a suspended water soluble alkali metal halide salt and 25-50% by weight diallyl dimethyl ammonium chloride monomer which comprises the steps of:
- A. purging said monomer solution with an inert gas;
- B. adding to the monomer solution from 0.015-0.05% by weight of a chelating agent based on the weight of dially dimethyl ammonium chloride present in said monomer solution while maintaining a flow of inert gas;
- C. heating said monomer solution with agitation to a temperature of 130.degree.-140.degree. F.;
- D. adding to the monomer solution from 0.75-5.0% by weight based on the weight of diallyl dimethyl ammonium chloride of an inorganic free radical initiator;
- E. maintaining the temperature at 135.degree.-146.degree. F. by applying a vacuum, so as to allow said solution to boil, while adding to the solution water to replace that distilled;
- F. heating said solution to 170.degree.-180.degree. F.;
- G. adding from 0.50-2.50% by weight of an inorganic free radical initiator based on the weight of the diallyl dimethyl ammonium chloride;
- H. maintaining the temperature of Step F for a sufficient period to insure the complete reaction of the diallyl dimethyl ammonium chloride under vacuum while continuously replacing distillate with fresh water;
- I. cooling the resultant solution and diluting said solution with water to a point where all of said alkali metal halide salt is soluble; and then,
- J. recovering a solution homopolymer of diallyl dimethyl ammonium chloride containing 15-30.0% by weight polymer and from 4-12.0% by weight water soluble alkali metal halide salt.
- 3. The method of claim 1 wherein the chealating agent is the sodium salt of ethylene diamine tetraacetic acid.
- 4. The method of claim 1 wherein the inorganic free radical initiator is ammonium persulfate.
- 5. The method of claim 1 wherein the alkali metal halide salt is sodium chloride.
Parent Case Info
This is a division of copending application Ser. No. 833,113 filed Sept. 14, 1977, now abandoned which in turn is a continuation-in-part of copending Ser. No. 763,469 filed Jan. 28, 1977, now abandoned, which in turn is a continuation-in-part of copending Ser. No. 662,397 filed Mar. 1, 1976, now abandoned.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
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Parent |
833113 |
Sep 1977 |
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Continuation in Parts (2)
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Number |
Date |
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763469 |
Jan 1977 |
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Parent |
662397 |
Mar 1976 |
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