Melt-processed blends containing poly(vinyl alcohol)
US5753752A · kind A · utility
2Cited by
16References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1997 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Feb 7, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L25/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polymers containing a high percentage of vinyl alcohol units are difficult to process into sheet, film, injection-molded objects, or fibers. Such melt-processing is greatly enhanced by admixing certain core/shell copolymers having a rubbery, preferably crosslinked core mainly of units derived from butadiene, and an outer shell mainly of a copolymer of styrene and acrylonitrile. Such copolymers do not require the presence of functional groups capable of reaction with the hydroxyl groups of the poly(vinyl alcohol).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.