Surfactant for self-inverting polyacrylmides

• US 5,925,714 A
• Filed: 03/04/1994
• Issued: 07/20/1999
• Est. Priority Date: 03/04/1994
• Status: Expired due to Term

• Current Assignee: SNF SAS (SPCM SA)
• Original Assignee: SNF SAS (SPCM SA)
• Inventors: Busler, William R., Dahanayake, Manilal, Larson, Eric H.
• Primary Examiner(s): SMITH, JEFFREY
• Application Number:
  US08/206,078
• Time in Patent Office: 1,964 Days
• Field of Search: 524/827, 524/310, 526/207, 526/370
• US Class Current: 524/827
• CPC Class Codes: C08F 2/32 Polymerisation in water-in-oil emulsions

Abstract

Improved water soluble vinyl addition polymers for use as thickening and flocculating agents in water purification treatment, paper manufacture and waste water treatment are prepared using alkoxylated castor oil as an activation release agent. The release agent is biodegradable thereby making the overall product process more environmentally friendly.

Claims

1. A water soluble vinyl addition polymer prepared by the inversion of a water-in-oil emulsion containing said polymer dispersed therein using a surfactant release agent comprising alkoxylated castor oil;

wherein said alkoxylated caster oil is selected from the group consisting of

ethoxylated castor oil, propoxylated castor oil, and mixtures thereof, and

said polymer is comprised of monomers selected from the group consisting of

acrylamide, methacrylamide, acrylic acid and the salts thereof, methacrylic acid and the salts thereof, acrylamidomethylpropane sulfonic acid and the salts thereof, and other vinyl carboxylic or sulfonic acids and their salts, and

amine monomers selected from the group consisting of

methacrylamidopropyltrimethylamine, acrylamidopropyltrimethylamine, acryloyloxyhydroxypropyltrimethylamine, methacryloyloxyhydroxypropyltrimethylamine, acryloyloxyethyltrimethylamine, methacryloyloxyethyltrimethylamine and their salts,

wherein said alkoxylated castor oil has approximately 10-40 moles of alkoxylation and is added to said water-in-oil emulsion in an amount of from about 0.5% to about 7.0% by weight based upon the total weight of the emulsion system.

4. The water soluble vinyl addition polymer of claim 1 wherein said surfactant release agent comprises a blend of alkoxylated castor oils and other water soluble surfactants.

2. An aqueous solution of a water soluble vinyl addition polymer prepared by the inversion of a water-in-oil emulsion containing said polymer dispersed therein using surfactant release agent comprising alkoxylated castor oil, the aqueous solution comprising the polymer and the release agent;

wherein said alkoxylated caster oil is selected from the group consisting of

ethoxylated castor oil, propoxylated castor oil, and mixtures thereof, and

said polymer is comprised of monomers selected from the group consisting of

acrylamide, methacrylamide, acrylic acid and the salts thereof, methacrylic acid and the salts thereof, acrylamidomethylpropane sulfonic acid and the salts thereof, and other vinyl carboxylic or sulfonic acids and their salts, and

amine monomers selected from the group consisting of

methacrylamidopropyltrimethylamine, acrylamidopropyltrimethylamine, acryloyloxyhydroxypropyltrimethylamine, methacryloyloxyhydroxypropyltrimethylamine, acryloyloxyethyltrimethylamine, methacryloyloxyethyltrimethylamine and their salts,

wherein said alkoxylated castor oil has approximately 10-40 moles of alkoxylation and is added to said water-in-oil emulsion in an amount of from about 0.5% to about 7.0% by weight based upon the total weight of the emulsion system.

3. The aqueous solution of the water soluble vinyl addition polymer of claim 2 wherein said surfactant release agent comprises a blend of alkoxylated castor oils and other water soluble surfactants.

5. An improved flocculating agent useful in the treatment of waste water and other purification applications comprising a water soluble vinyl addition polymer prepared by the inversion of a water-in-oil-emulsion containing said polymer dispersed therein using a surfactant release agent comprising alkylated castor oil;

wherein said alkylated castor oil is selected from the group consisting of ethoxylated castor oil, propoxylated castor oil, and mixtures thereof, and said polymer is comprised of monomers selected from the group consisting of acrylamide, methacrylamide, acrylic acid and salts thereof, methacrylic acid and the salts thereof, and other vinyl carboxylic or sulfonic acids and their salts, and amine monomers selected from the group consisting of methacrylamidopropyltrimethylamine, acrylamidopropyltrimethylamine, acryloyloxhydroxypropyltrimethylamine, methacryloyloxhydroxypropyltrimethylamine, acryloyloxyethyltrimethylamine, methacryloyloxyethyltrimethylamine and their salts, wherein said alkylated castor oil has approximately 10-40 moles of alkoxylation and is added to said water-in-oil emulsion in an amount of from about 0.5% to about 7.0% by weight based on the total weight of the emulsion system.

6. The improved flocculating agent of claim 5, wherein said surfactant release agent is selected from the group consisting of alkoxylated castor oil.

7. The flocculating agent of claim 6 wherein said alkoxylated castor oil is selected from the group consisting of ethoxylated castor oil, propoxylated castor oil and mixtures thereof.

8. The flocculating agent of claim 7 wherein said alkoxylated castor oil is added to said water-in-oil emulsion in an amount of approximately 0.5% to about 7.0% by weight based on the total weight of the system.

9. The flocculating agent of claim 8 wherein said surfactant release agent comprises a blend of alkoxylated castor oils and other water soluble surfactants.