One step process for making breathable, clay filled polymer compositions having controlled stability in contact with aqueous fluids
US6451895B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1999 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Dec 29, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/835
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention discloses novel water-responsive compositions with improved stability to aqueous liquids and an improved method of making the compositions. The addition of organically modified clay to poly(ethylene oxide) significant improves the liquid stability and melt processability of the PEO. The PEO compositions can be produced using an economical one step process comprising blending a dry mixture of PEO and organically modified clay particles and melt processing the dry mixture. The melt processing of a mixture of PEO and organically modified clay particles facilitates the melt processing of PEO over a broad range of molecular weights, most notably high molecular weights. Advantageously, the process described herein eliminates expensive and complex processing steps and is useful for manufacturing flushable articles such as disposable diapers, feminine pads, pantiliners, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.