Eth Zurich

Mario Stucki

Wendelin Jan Stark

Anna Margot Beltzung

Olivier Gröninger

Simon Leu

Konstantin Engel

The invention relates to the manufacturing of porous polymer membranes by (a) providing pellets comprising a polymer matrix and particles in the ratio 90:10 to 10:90, (b) converting said pellets into a non-porous film by a solvent-free process; (c) removing said particles from said film with an aqueous composition to thereby obtain said membrane. The invention further relates to pellets useful in such manufacturing process as well as porous polymer membranes obtainable or obtained by such manufacturing process as well as textile materials and articles containing such membranes; to the use of such pellets, membranes, and articles.

Solvent free process for manufacturing membranes

The invention relates to manufacturing processes for waterproof and breathable porous polymer membranes by coating a substrate with a dispersion comprising polymer, coated particles and diluent and removing the particles by dissolution, wherein the particles are made of organic salts, metal salts or metal oxides and the coating material is selected from carboxylic acids and alkoxy silanes. The invention further relates to dispersions to obtain such membranes, to polymer membranes obtained, to shaped articles containing such membranes; to the use of such membranes, shaped articles and intermediates.

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Zurich, Switzerland

Mario Stucki