Claims
- 1. A method of producing a stable, gel-free water-in-oil microdispersion comprising reacting A) a water-in-oil emulsion comprising
- 1) a continuous phase of a hydrocarbon oil and an emulsifier, and
- 2) a discontinuous phase comprising micelles of an aqueous solution of a vinyl polymer having a weight average molecular weight over about 1,000,000, with B) neutralized hydroxylamine and at least 0.25 molar excess of base, based on hydroxylamine, wherein said emulsifier is effective to prevent detrimental agglomeration of said micelles.
- 2. The method of claim 1 wherein the polymer is a polymer of acrylamide.
- 3. The method of claim 2 wherein B) contains a stabilizer which stabilizes the polymer against degradation due to the presence of hydroxylamine.
- 4. The method of claim 1 wherein the base is sodium hydroxide.
- 5. The method of claim 2 wherein the polymer is a copolymer of acrylamide and at least one additional comonomer.
- 6. The method of claim 5 wherein said additional comonomer is selected from the group consisting of dimethyldiallylammonium chloride, 2-acrylamidomethylpropane sulfonic acid, salts of 2-acrylamidomethylpropane sulfonic acid, (meth)acrylic acid and salts of (meth)acrylic acid.
- 7. The method of claim 1 wherein the neutralized hydroxylamine and base of B) are in the form of an emulsion.
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of application Ser. No. 08/421,168 filed on Apr. 13, 1995, now abandoned which is in turn a divisional of copending application Ser. No. 08/169,782, filed on Dec. 17, 1993, which in turn, is a continuation-in-part of application Ser. No. 07/704,477 filed May 23, 1991, now abandoned.
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Divisions (1)
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Number |
Date |
Country |
Parent |
169782 |
Dec 1993 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
421168 |
Apr 1995 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
704477 |
May 1991 |
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