Abstract:
The invention relates to a method for producing an adsorption heat exchanger, which is characterized by the following Steps: producing a heat exchanger structure; forming an adhesive layer (5) on the heat exchanger structure; filling the heat exchanger structure with a sorbent material (6.1); removing from the heat exchanger structure portions of the sorbent material that have bonded only weakly or not at all to the adhesive structure.
Abstract:
Blends of olefin polymers and syndiotactic vinyl polymers are produced by the catalytic polymerization of olefins and aromatic vinyl compounds or methacrylate esters as vinyl compounds in inert diluents in the presence of a catalyst mixture of transition metal compounds, metalloxane compounds and metal alkyl compounds.The blends have a finely dispersed distribution of the blending components and are suitable for the production of films, sheets, fibers, panels, coatings, pipes, hollow objects, injection molded products and foams.
Abstract:
In an internal combustion engine there is provided a cylinder head; a plurality of cylinder head bolts for securing the cylinder head to a cylinder block; at least one engine cylinder; at least two intake valves and two exhaust valves controlling the flow of gases into and from the engine cylinder. A plane defined by the intake valves and a plane defined by the exhaust valves extend at an angle of between 0.degree. and 15.degree. to one another and have an inclined orientation to the longitudinal engine axis. An overhead camshaft extends parallel to the engine axis and is situated in a zone bounded by the cylinder head bolts. Respective valve bridges interconnect the intake valves with one another and the exhaust valves with one another, and rocker arms connect respective cams of the camshaft with the valve bridges, whereby the intake valves are simultaneously operated by one cam and the exhaust valves are simultaneously operated by another cam.
Abstract:
The invention relates to a method for producing an adsorption heat exchanger, which is characterized by the following Steps: producing a heat exchanger structure; forming an adhesive layer (5) on the heat exchanger structure; filling the heat exchanger structure with a sorbent material (6.1); removing from the heat exchanger structure portions of the sorbent material that have bonded only weakly or not at all to the adhesive structure.
Abstract:
The present invention relates to a method for producing triazine carbamates by conversion of at least one triazine with at least one chloroformate in the presence of at least one alkaline or alkaline earth metal compound, wherein the alkaline or alkaline earth metal compound is not present in form of an alcoholate.
Abstract:
Disclosed are compounds of formula (I) which compounds are useful as cocatalysts in olefinic polymerisation reactions, e.g., as Ziegler-Natta catalysts.
Abstract:
Polymers are prepared from A) 60 to 95 percent by weight of a mixture including A1) 20 to 70 percent by weight of hydroxyalkyl amino triazines and A2) 30 to 80 percent by weight of bis(hydroxyalkyl) amino triazines B) 5 to 40 percent by weight of polyfunctional compounds selected from one or more of B1) polyisocyanates and/or oligomeric polyesters or polyethers with isocyanate end groups, B2) aliphatic dicarboxylic acids, esters, chlorides or anhydrides, or aromatic polybasic acids, esters, chlorides or anhydrides, B3) aliphatic or aromatic diglycidal compounds or triglycidyl compounds, and, optionally, C) 1 to 20 percent by weight of aliphatic, cycloaliphatic or aromatic dihydroxy compounds, polyalkylene glycols and aliphatic aldehydes.
Abstract:
Described are catalyst systems having aluminium alkyl complexes of the formula (I) described herein applied to magnesium chloride, SiO2 or SiO2 in combination with MgCl2 as support in the presence of titanium halides or vanadium halides and internal and, if desired, external donors act both as cocatalysts and as stereoselectivity promoters in heterogeneous polymerizations of &agr;-olefins. Also described are polymerization methods using these catalyst systems.
Abstract:
The invention relates to an arrangement for coating or etching substrates. In this arrangement an HF substrate bias voltage is generated without contact. For this purpose plasma sources are equipped with a bias pot which is disposed at the dark space distance from a substrate carrier and acted upon by HF. Depending on the source used, the bias pot can be constructed as an independent unit or as a component part of the source connected so as to be conducting-for example as an HF magnetron. Via this coupled-in HF power the dc potential on the carrier, and consequently the ion bombardment on the substrate, can be set specifically.
Abstract:
An apparatus for coating substrates in a vacuum chamber has a cathode system, which is preceded and followed by evacuable isolating chambers. The individual chambers can be separated from one another by locks, and the apparatus has a conduit leading into the coating chamber for feeding one or more process gases. Transport frames carry the substrates through the individual chambers on rails and/or wheels. In such an apparatus one or more bypass lines are provided which connect the coating chamber to the isolating chambers preceding or following it, and a shutoff or valve is inserted into each bypass line and brings about an equalization of pressure between the chambers. By means of a pressure equalization performed in this manner, the constancy of the gas concentrations which is essential in a reactive process to the stability of the process and to uniform coating properties, is automatically assured.