Scale and settlement inhibiting agent for use in treating industrial and/or household water
US4857622A · kind A · utility
4Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Sep 30, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An agent to be used to treat water and aqueous media contacting heat transfer surfaces for inhibiting the build-up of scale and settlement of dissolved alkaline earth materials in water and aqueous media, which agent consists of acrylic and methacrylic acid polymers and/or copolymers and is characterized in that it comprises the fraction of said polymers and/or copolymers having a symmetrical, single-mode molecular weight distribution centered on an average molecular weight of about 800, in which 100% of said molecular weights are individually lower than 1,200 and at least 90% of same are in the 400-1,000 range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.