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Preparation of two‐layer film having porous structure by emulsion blend technique
Author(s) -
Okubo M.,
Terada A.,
Kagawa Y.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12714
Subject(s) - materials science , emulsion , acrylate , copolymer , butyl acrylate , chemical engineering , ethyl acrylate , adhesive , polymer chemistry , methyl methacrylate , layer (electronics) , casting , methacrylate , composite material , polymer , engineering
A two‐layer film consisting of a tacky layer (air side) and a porous nontacky layer (release‐paper side) was prepared by casting blend emulsion on a release paper, in which 150‐nm 2‐ethylhexyl acrylate–2‐methoxyethyl acrylate–acrylic acid terpolymer particles having high storage stability and 542‐nm ethyl acrylate–methyl methacrylate copolymer particles having low storage stability were dispersed. Both emulsion particles were produced by emulsifier‐free emulsion copolymerizations. The difference of tackiness between both surfaces increased with increases in the film‐formation time and the concentration of electrolytes in the blend emulsion, and resulted in the two‐layer film. The film had a high water vapor permeability, which is also needed for medical adhesive tape. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2027–2033, 2003