摘要:
A method of cleaning contact surfaces in connection with integrated circuits embedded in identification cards. The cleaning is carried out during insertion of the card or in the testing position of the card by means of special cleaning devices or the contact elements themselves.The cleaning can be triggered or regulated as a function of the testing of the operability of the contacts.
摘要:
A method and apparatus for disintegrating an elastomer is provided. The elastomer is moved across a base relative to a cutting tool and toward the cutting tool. The cutting tool has a cutting wedge, which has a cutting edge and a rake face adjacent to the cutting edge. After the cutting wedge comes into contact with the elastomer, the elastomer is first at least partially compressed only by the rake face between the rake face and the base before the cutting edge cuts through the elastomer. An elastic evasive movement of the elastomer is avoided because of the initial planar compression of the elastomer by the rake face. Thus, it is possible to cut off significantly thinner pieces from the elastomer.
摘要:
An improved polymerization and process method allows the production of special nitrile rubbers which are characterized by a specific anion content and an excellent storage stability and allow a particularly good vulcanization rate and moreover result in vulcanized materials that have advantageous properties, especially with regard to the contact with metal components of molded parts based on said vulcanized materials.
摘要:
An improved polymerization and work-up process makes it possible to produce specific nitrile rubbers which have a particular ion index and a particular magnesium content which is responsible for an excellent vulcanization rate and leads to vulcanizates having an advantageous property profile.
摘要:
The present invention relates to rubber mixtures with functionalized diene rubbers and with microgels, to a production process, and to the use of the mixtures for the production of low-abrasion motor-vehicle tires which have wet-slip resistance and which have low rolling resistance.
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 concerns a vulcanizable composition, vulcanized products produced from it, and their use in particular in the production of golf balls or roll coverings.
摘要:
The present application provides novel nitrile rubbers comprising repeating units of at least one α,β-unsaturated nitrile, at least one conjugated diene and optionally one or more further copolymerizable monomers which nitrile rubbers are distinguished by a specific calcium content as well as a specific chlorine content and dispose of specific thio end groups. Additionally, an improved polymerization and work-up process is provided to produce the aforementioned nitrile rubbers.
摘要:
The present invention relates to a polymer electrolyte membrane for fuel cells, comprising a polymer matrix of at least one basic polymer and one or more doping agents, wherein particles containing ionogenic groups and having a mean particle diameter in the nanometer range are embedded in the polymer matrix and the particles containing ionogenic groups are distributed homogeneously in the polymer matrix in a concentration of less than 50% relative to the weight of the polymer matrix, as well as to the production and use of same, especially in high-temperature fuel cells.
摘要:
An improved polymerization and work-up process makes it possible to produce specific nitrile rubbers which have a particular ion index and a particular magnesium content which is responsible for an excellent vulcanization rate and leads to vulcanizates having an advantageous property profile.