Process for preparing improved transparent shaped articles from vinylidene chloride polymer compositions modified with a nitrile containing elastomer
US4079115A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1975 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | Dec 31, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L9/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process for preparing transparent shaped articles from a vinylidene chloride polymer, said articles having excellent barrier properties and a high degree of clarity, continuity and flexibility such process comprising (1) preparing a substantially homogeneous admixture from (A) a particulate vinylidene chloride polymer having crystalline melting peaks of at least about 175.degree. C. as determined by differential thermal analysis, and (B) a volatile material having dispersed or dissolved therein from about 3 to 20 percent based on vinylidene chloride polymer weight of a nitrile containing elastomer which is compatible with the vinylidene chloride polymer, and wherein the volatile material is a nonsolvent for the vinylidene chloride polymer, then (2) removing the volatile material from the admixture and (3) thermally fabricating the admixture into a shaped article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.