Water-soluble film
US8268914B2 · kind B2 · utility
9Cited by
7References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2007 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Dec 20, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L5/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A film-forming composition made from a mixture of PVOH, chitosan, an alkali metal or ammonium bisulfite or metabi sulfite, and optional ingredients such as plasticizers, antioxidants, UV stabilizers, surfactants, crosslinking agents, lubricants, and extenders, is disclosed. Also disclosed are a method of making a film from the composition, a resulting film, and a packet made from the film and containing a cleaning composition such as a rinse additive. The composition can be formulated to yield an article such as a film which is soluble only below a predetermined pH threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.