Thin polymer films and method

Details Thin polymer films and method Thin polymer films and method

1975-02-24

1976-06-01

Briggs, Sr., Wilbert J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

260824R, 260827, B32B 2520, C08F29300

Patent

active

039611221

ABSTRACT:
A method for making thin, substantially uniform and self-supporting polymer films by forming a solution of a base polymer, a surface-active block copolymer and a solvent, and forming a film from said solution by contacting it with film-forming means. The block copolymer contains at least two polymerized comonomers, one of which is compatible or substantially miscible with the base polymer and serves to distribute the block copolymer therein and the second of which is sufficiently surface-active in the resulting polymer solution to produce a solution having a surface tension sufficiently low to allow the formation of useful films less than 50 microns in thickness.

REFERENCES:
patent: 3342766 (1967-07-01), Huntington
patent: 3686355 (1972-08-01), Gaines et al.

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