Fujifilm Manufacturing Europe B.v.

Fujifilm Corporation

Erik Vermeer

Maarten Meijlink

Yujiro Itami

Shigehide Itoh

Petrus Van Kessel

Mayur Dalwani

A composite membrane comprising: a) a porous support; b) a gutter layer; and c) a discriminating layer which satisfies Formula (1): wherein: &#xd8; is &#x3c;4; x is the arithmetic mean of N measurements of the thickness of the discriminating layer and has a value of between 30 and 150 nm; N is at least 100; xis the thickness in nm of an individual measurement of thickness within the N measurements; x&#x3e;x&#x3e;0; and n is the number of individual thickness measurements where x&#x3e;x, &#x3e;0 

Membranes

A process for preparing a composite membrane comprising the steps of: a) applying a radiation-curable composition to a porous support; b) irradiating the composition and thereby forming a layer of cured polymer of thickness 20 to 400 nm on the support; c) forming a discriminating layer on the layer of cured polymer; and d) optionally forming a protective layer on the discriminating layer; wherein the radiation-curable composition comprises a partially crosslinked, radiation-curable polymer comprises dialkylsiloxane groups. Composite membranes are also claimed.

Process for preparing membranes

Growing community of inventors

Tilburg, Netherlands

Erik Vermeer