摘要:
An improved polymerization and processing method allows the production of special nitrile rubbers which are characterized by a specific cation content which leads to an excellent storage stability and particularly good vulcanization rate and moreover results in vulcanized materials that have advantageous properties.
摘要:
The invention provides a composition that contains at least one specific non-crosslinkable organic medium at least one microgel and at least one thickening agent, a process for the preparation thereof and uses of the compositions.
摘要:
The invention relates to a gas diffusion electrode for polymer electrolyte fuel cells having a working temperature of up to 250° C., comprising a plurality of gas-permeable electroconductive layers having at least one gas diffusion layer and one catalyst layer. The catalyst layer contains particles of an average particle diameter in the nanometer range, said particles containing ionogenic groups. The invention also relates to the production of said gas diffusion electrode and to the use of same in high-temperature polymer electrolyte membrane fuel cells.
摘要:
A composition is described, encompassing a constituent selected from the group consisting of a modified resin acid (I), a fatty acid (II) and a mixture composed of a modified resin acid (I) and of a fatty acid (II), where the degree of neutralisation of the constituent is from 104 to 165%. Its use for the production of microgels is also described.
摘要:
The present invention relates to layered-structure vulcanizates, where at least one of the layers is composed of a hydrogenated vinylpolybutadiene and the other layers are preferably composed of rubbers double bonds.
摘要:
A novel process for the metathetic degradation of nitrile rubbers is provided which uses specific transition metal complex catalysts showing an increased activity.
摘要:
An improved polymerization and work-up process makes it possible to produce specific nitrile rubbers which have a specific calcium and chloride content and have a particularly high storage stability.
摘要:
An improved polymerization and work-up process makes it possible to produce specific nitrile rubbers which have a particular ion index which is responsible for an excellent vulcanization rate and leads to vulcanizates having an advantageous property profile.
摘要:
The present invention relates to a composition containing thermoplastic materials and crosslinked microgels that have not been crosslinked by high-energy radiation, to a process for its preparation, to its use in the production of thermoplastically processable molded articles, and to molded articles produced from the composition.
摘要:
A process of degrading nitrile rubbers comprises subjecting them to a metathesis reaction in the presence of specific catalysts with increased activity.