The invention relates to a film Film comprising a random graft copolymer having a polypropylene (PP) backbone and from 3 to 8 polyester segments covalently bonded to said backbone, wherein the number average molecular weight (Mn) of the polypropylene backbone ranges between 10.000 and 100.000 Dalton (as determined with HT-SEC in o-DCB at 150 C.), wherein the Mn of each polyester segment ranges between 5.000 and 25.000 Daltons, wherein the amount of PP ranges between 45 and 80 mol %, wherein the amount of polyester segments ranges between 55 and 20 mol %, wherein the film has a thickness in the range of 0.01-10 mm, wherein the polypropylene and polyester domains form independently continuous phases, and wherein the mol % is calculated relative to the total moles of monomer units present in the copolymer. The invention further relates to a nano porous PP membrane and its use.

The invention relates to a film Film comprising a random graft copolymer having a polypropylene (PP) backbone and from 3 to 8 polyester segments covalently bonded to said backbone, wherein the number average molecular weight (Mn) of the polypropylene backbone ranges between 10.000 and 100.000 Dalton (as determined with HT-SEC in o-DCB at 150 C.), wherein the Mn of each polyester segment ranges between 5.000 and 25.000 Daltons, wherein the amount of PP ranges between 45 and 80 mol %, wherein the amount of polyester segments ranges between 55 and 20 mol %, wherein the film has a thickness in the range of 0.01-10 mm, wherein the polypropylene and polyester domains form independently continuous phases, and wherein the mol % is calculated relative to the total moles of monomer units present in the copolymer. The invention further relates to a nano porous PP membrane and its use.

A membrane obtainable from curing a composition comprising: (i) a curable compound comprising at least two (meth)acrylic groups and a sulphonic acid group and having a molecular weight which satisfies the equation:

MW<(300+300n) wherein: MW is the molecular weight of the said curable compound; and n has a value of 1, 2, 3 or 4 and is the number of sulphonic acid groups present in the said curable compound; and optionally (ii) a curable compound having one ethylenically unsaturated group; wherein the molar fraction of curable compounds comprising at least two (meth)acrylic groups, relative to the total number of moles of curable compounds present in the composition, is at least 0.25.

Provided is a process for preparation of a highly permeable thin film composite membranes for nanofiltration, reverse osmosis, and forward osmosis, particularly for reverse osmosis of brackish water. The process includes treating a prepared TFC membrane containing a discrimination layer on a frontside, a support layer, and a felt layer on the backside by contacting the backside of TFC membrane with a solution containing a pore protection agent that includes a tertiary amine salt of camphorsulfonic acid prior to or at the same time as contacting the frontside of the membrane with a solution containing a coating agent and drying the membrane. Also provided are reverse osmosis membranes prepared in accord with the method, and modules containing the highly permeable thin film composite membranes.

After bringing a water-containing peeling liquid in contact with a thin flat film formed on a substrate, a support film including a cover film having one main surface thereof is laminated onto the flat film, such that the support film is in contact with the flat film, a cover film-attached laminate composed of a support film and a cover film is then separated from the substrate, and the laminate including the flat film and the support film is separated from the cover film-attached film.

Provided is a process for preparation of a highly permeable thin film composite membranes for nanofiltration, reverse osmosis, and forward osmosis, particularly for reverse osmosis of brackish water. The process includes treating a prepared TFC membrane containing a discrimination layer on a frontside, a support layer, and a felt layer on the backside by contacting the backside of TFC membrane with a solution containing a pore protection agent that includes a tertiary amine salt of camphorsulfonic acid prior to or at the same time as contacting the frontside of the membrane with a solution containing a coating agent and drying the membrane. Also provided are reverse osmosis membranes prepared in accord with the method, and modules containing the highly permeable thin film composite membranes.

A blood filtration device comprising a generally cylindrical housing having an interior wall. An interior member is mounted interior of the housing and comprises an outer surface having a porous membrane disposed thereon. The housing and interior member are relatively rotatable and define an annular gap therebetween. The blood filtration device also comprises an inlet for directing fluid into the annular gap, a first outlet for exiting filtrate passing through the membrane, and a second outlet for directing from the annular gap the remaining retentate. The porous membrane comprises a first layer and a second layer.

A blood filtration device comprising a generally cylindrical housing having an interior wall. An interior member is mounted interior of the housing and comprises an outer surface having a porous membrane disposed thereon. The housing and interior member are relatively rotatable and define an annular gap therebetween. The blood filtration device also comprises an inlet for directing fluid into the annular gap, a first outlet for exiting filtrate passing through the membrane, and a second outlet for directing from the annular gap the remaining retentate. The porous membrane comprises a first layer and a second layer.

A membrane obtainable from curing a composition comprising: (i) a curable compound comprising at least two (meth)acrylic groups and a sulphonic acid group and having a molecular weight which satisfies the equation: MW<(300+300n) wherein: MW is the molecular weight of the said curable compound; and n has a value of 1, 2, 3 or 4 and is the number of sulphonic acid groups present in the said curable compound; and optionally (ii) a curable compound having one ethylenically unsaturated group; wherein the molar fraction of curable compounds comprising at least two (meth)acrylic groups, relative to the total number of moles of curable compounds present in the composition, is at least 0.25.

The purpose of the present invention is to provide a composite electrolyte membrane which has excellent chemical resistance and can maintain sufficient mechanical strength even under conditions of high humidity and high pressure, which are the operating conditions for electrochemical hydrogen pumps and water electrolyzers. This composite electrolyte membrane, which is for achieving said purpose, has a composite layer obtained by combining a polyelectrolyte with a mesh woven material that satisfies (1) and (2) and comprises liquid crystal polyester fibers or polyphenylene sulfide fibers. (1): Mesh thickness (m)/fiber diameter (m)<2.0. (2): Opening (m)/fiber diameter (m)>1.0.