Christine A Costello

US Patent:

46526234, Mar 24, 1987

Filed:

Nov 23, 1984

Appl. No.:

6/674215

Inventors:

Christine A. Costello - Amherst MA
Gary F. Matz - Revere MA

Assignee:

Calgon Corporation - Pittsburgh PA

International Classification:

C08F22802
C08F22604

US Classification:

526287

Abstract:

The instant invention is directed to a polymer, having an intrinsic viscosity of 1. 0 to 7. 0, preferably 1. 5 to 5. 0, dl/g in 1. 0M NaCl, prepared from: (A) 2. 5 to 45%, by weight, of at least one unsaturated carboxylic acid, or its salt; (B) 5. 0 to 85%, by weight, of at least one unsaturated sulfonic acid, or its salt; (C) 2. 5 to 15%, by weight, of at least one unsaturated cationic-containing monomer; and (D) 0 to 90%, by weight, of at least one unsaturated non-ionic monomer. The instant invention is also directed to the polymer in combination with an aqueous clay dispersion and the use of the admixture as a filtration aid in drilling muds.

US Patent:

47269065, Feb 23, 1988

Filed:

Dec 4, 1986

Appl. No.:

6/937847

Inventors:

Christine A. Costello - Amherst MA
Gary F. Matz - Revere MA

Assignee:

Calgon Corporation - Pittsburgh PA

International Classification:

C09K 702
C08F22802

US Classification:

252 8514

Abstract:

The instant invention is directed to a polymer, having an intrinsic viscosity of 1. 0 to 7. 0, preferably 1. 5 to 5. 0, dl/g in 1. 0 M NaCl, prepared from: (A) 2. 5 to 45%, by weight, of at least one unsaturated carboxylic acid, or its salt; (B) 5. 0 to 85%, by weight, of at least one unsaturated sulfonic acid, or its salt; (C) 2. 5 to 15%, by weight, of at least one unsaturated cationic-containing monomer; and (D) 0 to 90%, by weight, of at least one unsaturated non-ionic monomer. The instant invention is also directed to the polymer in combination with an aqueous clay dispersion and the use of the admixture as a filtration aid in drilling muds.