Abstract: A composite membrane comprising: a) a porous support; b) a gutter layer, a portion of which is present within the support and a portion of which is outside of the support; and c) a discriminating layer on the gutter layer; wherein: (i) the portion of the gutter layer outside of the support has an average thickness (GLe) of 10 nm to 900 nm; and (ii) the portion of the gutter layer present within the support has an average thickness (GLi) of 10% to 350% of GLe.

Abstract: A composite membrane comprising: (a) a porous support; (b) a gutter layer; (c) a discriminating layer having an average thickness of at most 90 nm; and (d) a protective layer having an average thickness 150 nm to 600 nm comprising dialkylsiloxane groups.

Abstract: A process for preparing a composite membrane comprising the steps: a)applying a radiation-curable composition to a porous support; b)irradiating the composition and thereby forming a gutter layer of cured polymer; and c)forming a discriminating layer on the gutter layer; wherein the radiation-curable composition comprises a partially crosslinked, radiation-curable polymer comprising epoxy groups and siloxane groups, a photoinitiator and is substantially free from mono-epoxy compounds. Composite membranes and gas separation cartridges are also claimed.

Abstract: A composite membrane comprising: a) a porous support; b) a gutter layer; and c) a discriminating layer; wherein at least 10% of the discriminating layer is intermixed with the gutter layer.

Abstract: A process for preparing a composite membrane comprising a porous support layer and a discriminating layer, comprising the steps of: (a) providing a porous support layer; (b) incorporating an inert liquid into the pores of the support layer; (c) applying a curable composition to the support layer; and (d) curing the composition, thereby forming the discriminating layer on the porous support. The process is particularly useful for preparing gas separation composite membranes.

Abstract: A composite membrane comprising a discriminating layer and a porous support layer for the discriminating layer, CHARACTERISED IN THAT the discriminating layer comprises at least 60 wt % of oxyethylene groups and the porous support layer has a CO2 gas flux of 5 to 150×10?5 m3 (STP)/m2·s·kPa at a feed pressure of 2.07 kPa. The membranes are particularly useful for purifying waste gas streams e.g. by removing greenhouse gases.

Abstract: A process for preparing a membrane comprising the steps of providing a composition comprising a polymerizable compound having at least 25 oxyethylene groups and at least two non-substituted vinyl groups, applying the composition to a support thereby forming a continuous layer on the support, and polymerizing the composition thereby forming a non-porous polymer film. Also claimed are the resultant membranes and their uses, e.g. for separating polar and non-polar gases.

Abstract: The present invention relates to a membrane wherein said membrane comprises a polymerized composition that comprised prior to polymerization at least one type of compound comprising at least 70 oxyethylene groups and at least two polymerizable groups. The invention further relates to the use of this membrane for separating polar gases and vapors.

Abstract: The present invention relates to a membrane wherein said membrane comprises a continuous non-porous layer comprising a polymerized composition that comprised prior to polymerization at least one type of compound having a molecular weight of at least 1500 Da and comprising at least 75 weight % of oxyethylene groups and at least two polymerizable groups each comprising a non-substituted vinyl group. The invention further relates to the use of this membrane for separating polar gases and vapors.

Abstract: The present invention relates to a porous membrane obtainable by polymerizing at least one type of curable epoxyacrylate monomer that is soluble in a solvent wherein at least 50 wt % of said solvent is water. The invention further relates to image recording materials, in which these porous membranes are used.

Abstract: The present invention relates to a porous membrane obtainable by polymerizing a curable composition comprising at least one type of curable compound, water and at least one type of chain transfer agent having a chain transfer constant of more than 0.1 with styrene, methyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate or acrylonitrile. The invention further relates to image recording materials, in which these membranes are used.

Abstract: A composite membrane comprising a discriminating layer and a porous support layer for the discriminating layer, CHARACTERISED IN THAT the discriminating layer comprises at least 60 wt % of oxyethylene groups and the porous support layer has a CO2 gas flux of 5 to 150×10?5 m3(STP)/m2.s.kPa at a feed pressure of 2.07 kPa. The membranes are particularly useful for purifying waste gas streams e.g. by removing greenhouse gases.

Abstract: A process for preparing a composite membrane comprising a porous support layer and a discriminating layer, comprising the steps of: (a) providing a porous support layer; (b) incorporating an inert liquid into the pores of the support layer; (c) applying a curable composition to the support layer; and (d) curing the composition, thereby forming the discriminating layer on the porous support. The process is particularly useful for preparing gas separation composite membranes.

Abstract: The present invention relates to a membrane wherein said membrane comprises a continuous non-porous layer comprising a polymerized composition that comprised prior to polymerization at least one type of compound having a molecular weight of at least 1500 Da and comprising at least 75 weight % of oxyethylene groups and at least two polymerizable groups each comprising a non-substituted vinyl group. The invention further relates to the use of this membrane for separating polar gases and vapors.

Abstract: The present invention relates to a membrane wherein said membrane comprises a polymerized composition that comprised prior to polymerization at least one type of compound comprising at least 70 oxyethylene groups and at least two polymerizable groups. The invention further relates to the use of this membrane for separating polar gases and vapors.

Abstract: A process for preparing a membrane comprising the steps of: (i) Providing a composition comprising a polymerizable compound having at least 25 oxyethylene groups and at least two non-substituted vinyl groups; (ii) Applying said composition to a support thereby forming a continuous layer on the support; (iii) Polymerizing said composition thereby forming a non-porous polymer film. Also claimed are the resultant membranes and their uses, e.g. for separating polar and non-polar gases.

Abstract: The present invention relates to a porous membrane comprising multiple layers, at least one type of curable compound and at least two types of photo-initiator, wherein at least two layers each contain a the different photo-initiator. The invention further relates to recording media which comprise the porous membrane of the invention, as well as to processes for producing the membrane and the recording media.

Abstract: The present invention relates to a porous membrane obtainable by polymerizing a curable composition comprising at least one type of curable compound, water and at least one type of chain transfer agent having a chain transfer constant of more than 0.1 with styrene, methyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate or acrylonitrile. The invention further relates to image recording materials, in which these membranes are used.

Abstract: The present invention relates to a porous membrane obtainable by polymerizing at least one type of curable epoxyacrylate monomer that is soluble in a solvent wherein at least 50 wt % of said solvent is water. The invention further relates to image recording materials, in which these porous membranes are used.

Abstract: The present invention relates to a porous membrane wherein said porous membrane comprises a cured coating composition that comprised prior to curing at least one type of monomer wherein the miscibility of water with said monomer at 25° C. is between 2 weight % and 50 weight %, and a solvent. The invention further relates to image recording materials, in which these porous membranes are used.