Michael J O'Connor

US Patent:

52985555, Mar 29, 1994

Filed:

Jul 30, 1992

Appl. No.:

7/922885

Inventors:

Michael N. O'Connor - Norwalk CT
Lesley J. Barker - Shelton CT
Roderick G. Ryles - Milford CT

Assignee:

American Cyanamid Company - Stamford CT

International Classification:

C08F 232

US Classification:

524801

Abstract:

A stable, water-in-oil emulsion comprising an aqueous phase containing a water soluble polymer and an oil phase containing a partially esterified lower N,N-dialkanol fatty amine emulsifier, the ratio of the aqueous phase to the oil phase ranging from about a 2:1 to about 3:5:1 and the polymer content of the emulsion being at least 20%, by weight based on the total weight of the emulsion, wherein said oil phase also contains a second emulsifier comprising a nonionic, reaction product of ethylene oxide and a long chain compound containing a reactive hydroxyl and/or carboxyl group and having an HLB above 5 but less than 14, the total weight of the emulsifiers comprises about 1-5% of the emulsion, and the second emulsifier constitutes from about 10 to 150% of the weight of the fatty amide and contains less than 0. 1 weight percent of sorbitan, sorbitol, mixture thereof and derivatives thereof.

US Patent:

53767136, Dec 27, 1994

Filed:

Dec 14, 1993

Appl. No.:

8/167271

Inventors:

Michael N. O'Connor - Norwalk CT
Lesley J. Barker - Shelton CT
Roderick G. Ryles - Milford CT

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C08K 515

US Classification:

524728

Abstract:

Stable, water-in-oil emulsions are prepared wherein the aqueous phase thereof contains a water-soluble polymer and the oil phase thereof contains a partially esterified lower N,N-dialkanol fatty amine emulsifier by the emulsion polymerization of water-soluble monomers at a ratio of aqueous phase to oil phase of about 2 to 1 to about 3. 5 to 1 and a monomer content of at least about 20%, by weight, wherein the polymerization is conducted in the presence of a second emulsifier comprising a non-ionic, reaction product of ethylene oxide and a long chain compound containing a reactive hydroxyl and/or carboxyl group and having an HLB of above 5 but less than 14, the total weight of the emulsifiers comprising about 1-5% of the emulsion wherein the second emulsifier constitutes from about 10 to about 150% of the weight of the fatty amide and contains less than 0. 1 weight percent of sorbitan, sorbitol mixtures thereof and derivatives thereof.