Process for preparing improved transparent shaped articles from

Details Process for preparing improved transparent shaped articles from Process for preparing improved transparent shaped articles from

1975-12-31

1978-03-14

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

260890, 260891, 264101, 264331, 264349, B29B 304

Patent

active

040791157

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.

REFERENCES:
patent: 2456454 (1948-12-01), Signer
patent: 2552904 (1951-05-01), Newberg et al.
patent: 2614094 (1952-10-01), Wheelock
patent: 2658053 (1953-11-01), Signer
patent: 2851735 (1958-09-01), Hogg et al.
patent: 2935763 (1960-05-01), Newman et al.
patent: 3444267 (1969-05-01), Beer
patent: 3658947 (1972-04-01), Ito et al.

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