摘要:
A process for the production of polychloroprene mixtures of sol and gel polymers in a ratio, by weight, of rom 1:4 to 9:1, the gel polymer being produced by radical emulsion polymerization from chloroprene in the presence of 4 to 10% by weight of water soluble disproportionated abietic acid, and the sol polymer being produced by radical emulsion polymerization of chloroprene in the presence of not more than 3.5% by weight of a water soluble disproportionated abietic acid with the polychloroprene mixture containing at most 3.8% of said acid.
摘要:
This invention relates to a polychloroprene elastomer distinguished by good processing properties and high tensile strength in the form of a polychloroprene mixture containing a sol polymer and a gel polymer in a ratio, by weight, of from 1:4 to 9:1, characterized in that both polymers have been produced in the presence of from 2.5 to 4.0 parts, by weight, of the potassium salt of disproportionated abietic acid (expressed as acid), from 0.3 to 1.0 part, by weight, of a condensation product of naphthalene sulphonic acid and formaldehyde and from 0.1 to 1.5 parts, by weight, of potassium hydroxide, based in each case on 100 parts, by weight, of monomer, and in that the gel polymer is a copolymer of chloroprene and from 1.5 to 2.5 mole percent, based on total monomer, of a diester corresponding to the following general formula: ##STR1## wherein R.sub.1 and R.sub.2 represent hydrogen, chlorine or C.sub.1 -C.sub.4 alkyl; andX represents C.sub.2 -C.sub.10 alkylene.
摘要:
Xanthogen disulphides of the following formula: ##STR1## wherein R and R.sub.1 independently represent hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.8 -cycloalkyl or an oxygen-containing heterocyclic ring system having from 5 to 8 ring members and optionally mono- or tri-substituted by C.sub.1 -C.sub.4 -alkyl, and whereinR and R.sub.1 may also be connected together to complete a hetero cyclic ring having from 3 to 6 carbon atoms and from 1 to 3 oxygen ring members, and the ring may be substituted by from 1 to 3 C.sub.1 -C.sub.4 -alkyl groups, with a content of elemental sulphur of less than 1.7% by weight, a process for their production by the reaction of a xanthic acid-O-ester-alkali metal salt of the following formula: ##STR2## wherein R and R.sub.1 are as defined in claims 1 and 3, andM represents an alkali metal, with aqueous chlorine bleach liquor, characterized in that aqueous chlorine bleach liquor having a concentration of less than 0.9 mol NaOCl/kg is used, and oxidation is carried out at a temperature of from 10.degree. to 20.degree. C. and at a pH of from 8 to 12, only until from 0.1 to 5.0 mol % of the xanthic acid-O-ester-alkali metal salt, based on the quantity used, is still present at the end of the reaction, as well as their use as molecular weight regulators in the polymerization of chloroprene.
摘要:
A method by which a User can associate selectable Markers, Data Packets and/or Objects with Content. The Content may generally be distributed electronically, and the Markers allow for insertion and/or overlay of Objects when the Content is selected for viewing by a Viewer. Objects and Data Packets are generally provided by a User, Promoter, Host, Service, or other entity to convey information to a Viewer. A Service provides tools and capabilities to both the User and the Promoter to facilitate their respective actions according to embodiments of the invention, including enabling the creation of live social networks (such as those linked to a specific Service provider, a specific User group, activities by a specific Promoter, and/or to specific Data Packets) and the creation of n-dimensional Virtual Environments.
摘要:
A system and method that uses internet content and/or content metadata as a means to establish social networks. Examples include linking internet users, searchers, viewers and/or listeners of the same and/or similar internet content to each other via a platform that enables any of the following in n-dimensional environments: social networking, communications, sharing, e-commerce, advertising, search, hosting and registry services, push and pull applications, anonymous communications, and rich presence.
摘要:
A locking device (1) in a vehicle, in particular for a vehicle seat, is provided with a base plate (3) which has a receptacle (5) for a counter element (B). At least one clamping eccentric (11) is mounted pivotably on the base plate (3) by means of a first bearing pin (9) and normally, on account of prestressing, secures the counter element (B) in the receptacle (5). At least one intercepting component (21) is likewise mounted pivotably on the base plate (3) and, in the event of a crash, leads to the counter element (B) being supported. The clamping eccentric (11) and the intercepting component (21) act directly on the counter element (B).
摘要:
The present invention relates to a drill comprising a cemented carbide or high speed steel substrate and a coating wherein the coating comprises: a first layer system having a multilayered structure covering substantially the whole active part of the drill, a second layer system having a multilayered structure covering only the tip area of the drill. Drills according to the present invention have good wear resistance and improved properties when reconditioning the drill. The present invention also relates to a method of making a drill according to the present invention.
摘要:
Devices, systems and methods employ magnetic force to resist tissue collapse in targeted pharyngeal structures and individual anatomic components within the pharyngeal conduit during sleep.
摘要:
The invention relates to a cooling element, particularly for use in walls of furnaces that are subjected to high levels of thermal stress, and to a method for producing a cooling element. The cooling element is comprised of cast copper or of a low-alloyed copper alloy and is provided with coolant channels, which consist of tubes cast inside the copper or the copper alloy and which are placed inside the cooling element. In order to create a cooling element with an improved material bond on the contact surfaces between the cooling tube and the metal cast around it and thus with an increased heat transfer, the invention provides that the tubes of the coolant channels are provided with an electrolytic coating on the exterior thereof. The use of copper tubes has been shown to be particularly advantageous, and the coating of the tube exteriors thereof ensues in an electroplating bath.
摘要:
In the case of a locking mechanism (1) for a vehicle seat, in particular for a motor vehicle seat, having an open housing (5), a latch (11) which is mounted pivotably on the housing (5) and is intended for locking with a mating element (B), and at least one securing element (25, 31) which is likewise mounted pivotably on the housing (5) and, by interaction with the latch (11), secures a locked state, the locking mechanism (1) is attachable to a structural part (41), and the structural part (41) forms the cover for the substantial closing of the housing (5).