Die mechanischen und elektrostatischen Eigenschaften photographischer, wenigstens eine Silberhalogenidschicht enthaltender Materialien werden durch Zusatz vernetzter Acrylsäure- und/oder Methacrylsäurepolymerisatteilchen zu wenigstens einer der Schichten des Materials verbessert. Die Polymerisatteilchen werden hergestellt entweder (a) durch innerte Emulsionspolymerisation von Acrylsaüre-und/oder Methacrylsäuremonomeren in Gegenwart vernetztend wirkender Monomerer, Brechen der Emulsion und Redispergieren der Polymerteilchen in Wasser, oder (b) durch Emulsionspolymerisation kurzkettiger Ester der Acrylsäure- und/oder Methacrylsäuremonomeren in Gegenwart vernetzend wirkender Monomerer und anschließender Verseifung des Polymeren.
A recording material comprising a sheet, ribbon or web support and a hydrophilic colloid binder layer incorporating an ionic copolymer in the form of dispersed particulate material providing to said material an antistatic character, characterized in that said ionic copolymer is a cross-linked addition copolymer wherein at least 30 mole % of its recurring units are recurrring units containing a sulphonic acid salt group that has been obtained via a reaction of propane sultone or butane sultone with carboxylate salt groups present originally in recurring units of said copolymer.
Highly durable polymer electrolytic membrane for a fuel cell having a cross-linked structure
申请人:Yoshida Masaru
公开号:US20060134493A1
公开(公告)日:2006-06-22
The objective of the invention is to solve the problems of conventional polymer electrolyte membranes, including small ion-exchange capacity and low oxidation and methanol resistance. A polymer film substrate is irradiated with γ-rays, electron beams or other radiations to perform multi-graft polymerization with functional monomers and then the polymer film substrate containing the grafted molecular chains or the graft molecular chains into which sulfonic acid groups have been introduced is crosslinked by irradiation to produce a polymer electrolyte membrane that has outstanding oxidation resistance, dimensional stability, electrical conductivity and methanol resistance and which can be controlled in ion-exchange capacity over a wide range.
THERMOSET POLYMERS OF STYRENE TERMINATED TETRAKIS PHENOLS
申请人:ALLIED CORPORATION
公开号:EP0344165A1
公开(公告)日:1989-12-06
Crosslinked polymer electrolyte fuel cell membranes and their producing process
申请人:Asano Masaharu
公开号:US20060281824A1
公开(公告)日:2006-12-14
A polymer electrolyte membrane produced by a process in which a monofunctional vinyl monomer into which sulfonic acid groups can be introduced and a vinyl monomer having a halogen at a terminal are co-grafted into a polymer base film that has been exposed to an ionizing radiation, and the base film is exposed again to an ionizing radiation and/or heat treated so that the terminal halogen is eliminated to introduce a crosslinking structure in which the graft molecular chains are bound together.