Polyether sulfone ultrafine powder having a particle size larger than 0.1 m and smaller than or equal to 5 m and a coating having the ultrafine powder added thereto are disclosed. The polyether sulfone ultrafine powder is easy to be mixed uniformly with other materials and has better flowing property and higher affinity for water, is unlikely to be clustered in a solvent, and is stable in performance after being dissolved. In addition, less organic solvent would be used when the coating is prepared. Besides, when the polyether sulfone ultrafine powder is used as plastic and glass modifiers, the surface finish of the obtained plastic plates and glass products is improved.

Polyether sulfone ultrafine powder having a particle size larger than 0.1 m and smaller than or equal to 5 m and a coating having the ultrafine powder added thereto are disclosed. The polyether sulfone ultrafine powder is easy to be mixed uniformly with other materials and has better flowing property and higher affinity for water, is unlikely to be clustered in a solvent, and is stable in performance after being dissolved. In addition, less organic solvent would be used when the coating is prepared. Besides, when the polyether sulfone ultrafine powder is used as plastic and glass modifiers, the surface finish of the obtained plastic plates and glass products is improved.

The present invention is directed to aqueous systems for polyamideimide, polyether imide, and/or polyamic acid binder solutions. The present invention provides stable aqueous binder solutions equivalent or superior to current aqueous binder solutions.

The present invention is directed to aqueous systems for polyamideimide, polyether imide, and/or polyamic acid binder solutions. The present invention provides stable aqueous binder solutions equivalent or superior to current aqueous binder solutions.

The invention concerns the field of polymer chemistry and relates to membranes, such as those used as membranes for the preparation of aqueous solutions by means of reverse osmosis or microfiltration, ultrafiltration or nanofiltration, for example.

The object of the present invention is the specification of membranes that exhibit a reduced fouling tendency with equally suitable or improved filtration properties, as well as the specification of a simple and cost-effective method for the production thereof.

The object is attained with membranes comprising a substrate on which a porous supporting layer is arranged, on which supporting layer a separation-active layer is arranged, and on which separation-active layer a cover layer is also arranged, wherein the material of the separation-active layer comprises functional groups which primarily have carbon-carbon triple bonds and/or carbon-nitrogen triple bonds, and wherein the material of the cover layer has functional groups which are primarily at least azide groups, and the functional groups having at least carbon-carbon triple bonds and/or carbon-nitrogen triple bonds are chemically coupled covalently with the azide groups.

The invention concerns the field of polymer chemistry and relates to membranes, such as those used as membranes for the preparation of aqueous solutions by means of reverse osmosis or microfiltration, ultrafiltration or nanofiltration, for example.

The object of the present invention is the specification of membranes that exhibit a reduced fouling tendency with equally suitable or improved filtration properties, as well as the specification of a simple and cost-effective method for the production thereof.

The object is attained with membranes comprising a substrate on which a porous supporting layer is arranged, on which supporting layer a separation-active layer is arranged, and on which separation-active layer a cover layer is also arranged, wherein the material of the separation-active layer comprises functional groups which primarily have carbon-carbon triple bonds and/or carbon-nitrogen triple bonds, and wherein the material of the cover layer has functional groups which are primarily at least azide groups, and the functional groups having at least carbon-carbon triple bonds and/or carbon-nitrogen triple bonds are chemically coupled covalently with the azide groups.

The invention pertains to a side-chain epoxy-functionalized copolymer (P1) and to the process for preparing this copolymer (P1). The present invention also pertains to the use of the copolymer (P1) in the preparation of a membrane, a composite material or a coating. The present invention also relates to a resin composition comprising at least the copolymer (P1) according to the present invention.

The invention pertains to a side-chain epoxy-functionalized copolymer (P1) and to the process for preparing this copolymer (P1). The present invention also pertains to the use of the copolymer (P1) in the preparation of a membrane, a composite material or a coating. The present invention also relates to a resin composition comprising at least the copolymer (P1) according to the present invention.

Ceramic-polymer powders comprising a plurality of core-shell particles, where: each of the core-shell particles comprises a core and a shell around the core; the core comprises a ceramic selected from the group of ceramics consisting of: Al.sub.2O.sub.3, Fe.sub.2O.sub.3, ZnO, ZrO.sub.2, and SiO.sub.2; and the shell comprises a polymer selected from the group of polymers consisting of: PC copolymers, polyetherimide (PEI), polyetherimide (PEI) copolymers, polyphenyl sulfone (PPSU), polyarylethersulfone (PAES), and poly ether sulfones (PES). In powder form, the core-shell particles are in a substantially dry powder form having a moisture content of less than 2% by weight.

Ceramic-polymer powders comprising a plurality of core-shell particles, where: each of the core-shell particles comprises a core and a shell around the core; the core comprises a ceramic selected from the group of ceramics consisting of: Al.sub.2O.sub.3, Fe.sub.2O.sub.3, ZnO, ZrO.sub.2, and SiO.sub.2; and the shell comprises a polymer selected from the group of polymers consisting of: PC copolymers, polyetherimide (PEI), polyetherimide (PEI) copolymers, polyphenyl sulfone (PPSU), polyarylethersulfone (PAES), and poly ether sulfones (PES). In powder form, the core-shell particles are in a substantially dry powder form having a moisture content of less than 2% by weight.