Modified polyester films

Details Modified polyester films Modified polyester films

1978-03-29

1980-08-12

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

260 40R, 2642101, 528275, 528295, C08G 6368

Patent

active

042174414

ABSTRACT:
Polyester films are modified by the addition of a high molecular weight polyethylene glycol and an alkali metal salt of a sulfonic acid-substituted dicarboxylic acid ester to the reaction medium during the polymerization process. Films prepared for example, from diesters of terephthalic acid in the presence of the modifiers of this invention exhibit good permeability to water vapor.

REFERENCES:
patent: 3018272 (1962-01-01), Griffing et al.
patent: 3455720 (1969-07-01), Davies et al.
patent: 3461468 (1969-08-01), Morgan et al.
patent: 3560605 (1971-02-01), Siggel et al.
patent: 3563942 (1971-02-01), Heiberger
patent: 3779993 (1973-12-01), Kibler et al.
patent: 3853820 (1974-12-01), Vachon
patent: 4042565 (1977-08-01), Hoheisel et al.

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