Composition for cleaning soiled items, namely optical items, and method for cleaning said items
US7638472B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2005 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Jul 19, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/2096
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a cleaning solution comprising, based on the total weight of the solution: (a) more than 50% by weight of at least one lactone (component A); (b) and 1 to 10% by weight of at least one surfactant compound (component B) having a HLB ranging from 8 to 15 and selected from the group consisting of compounds of formulawherein: R1 denotes a hydrocarbon group comprising from 1 to 20 carbon atoms; n″ is an integer from 1 to 5, X denotes a valence link, —O—, —OCH2, C═O or (CH2)k, k being an integer varying from 1 to 2; Y denotes (RO)jH wherein j is an integer ranging from 2 to 40, and R is a divalent hydrocarbon group, and compounds of formulawherein l is an integer from 6 to 13 and m is an integer from 3 to 15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.