Water-soluble polymers and/or copolymers possessing increased biodegradability, and their applications
US5278248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1992 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Nov 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3757
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Water-soluble polymers and/or copolymers possessing enhanced biodegradability, and their applications are disclosed. Acrylic and/or vinyl polymers and/or copolymers containing acid groups, in which 35% to 90% of the active acid sites are neutralized by magnesium ions, the specific viscosity is at most 25, and biodegradability is enhanced. Their decomposition after 36 days is greater than 50% as measured by the modified Sturm test. These polymers can be used in industries as varied as: paper-making, paints, plastics, petroleum, drilling fluids, water treatment, detergents, cosmetics, textiles, inks, leather, grinding and/or splitting of minerals in water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.