摘要:
A cartridge for purifying exhaust gases from the internal combustion engine of an automotive vehicle or some other source comprising a catalyst support matrix wound of metal foil and a metal jacket housing said support matrix wherein a press fit exists between the exterior of the support matrix and the interior surface of the jacket and the support matrix and the jacket are welded or brazed together within the area of the press fit. Processes and apparatus for producing the cartridge of the invention are also disclosed.
摘要:
A cartridge for purifying exhaust gases from the internal combustion engine of an automotive vehicle or some other source comprising a catalyst support matrix wound of metal foil and a metal jacket housing said support matrix wherein a press fit exists between the exterior of the support matrix and the interior surface of the jacket and the support matrix and the jacket are welded or brazed together within the area of the press fit. Processes and apparatus for producing the cartridge of the invention are also disclosed.
摘要:
A cartridge for purifying exhaust gases from the internal combustion engine of an automotive vehicle or some other source comprising a catalyst support matrix wound of metal foil and a metal jacket housing said support matrix wherein a press fit exists between the exterior of the support matrix and the interior surface of the jacket and the support matrix and the jacket are welded or brazed together within the area of the press fit. Processes and apparatus for producing the cartridge of the invention are also disclosed.
摘要:
Modified novolaks based on phenols which are trifunctional with respect to formaldehyde and contain, as modifying components, terpenes and unsaturated carboxylic acids or derivatives of these compounds, the weight ratio between the terpenes and the unsaturated carboxylic acids or derivatives thereof being in the range from 98.5:2.5 to 2.5:98.5 and the weight ratio between the phenolic component and the sum of the modified components being in the range from 95:5 to 5:95 and the modified novolaks having a melting point greater than 45.degree. C.Process for the preparation of the modified novolaks by admixing the modifying components indicated with non-modified novolaks in the necessary amounts at temperatures between 80.degree. and 300.degree. C.Use of the modified novolaks as reinforcing resins for rubber and elastomers, as tackifying agents for rubber, as binders for friction linings, curable molding compositions, impregnants, coatings, paints and binders for finely divided inorganic substrates.
摘要:
Binders based on co-condensates of epoxy resins and resols with amines, the epoxy resin being partially defunctionalized and still containing on average 0.5-1.3 epoxide groups per molecular unit, the resol component being composed of methylol compounds of oligomethylene compounds, which are additionally substituted by hydrocarbon or hydroxyalkyl or hydroxyaralkyl radicals, and the amine containing at least one primary or secondary amino group and at most 2 hydroxyl groups.The invention further relates to a process for the preparation of a binder and for the electrophoretic deposition of a cationic resin from an aqueous dispersion onto an article connected as the cathode and to an aqueous electrophoresis bath for carrying out this process.
摘要:
Disclosed is a clamped connection for clamping together separate parts, comprising a first part having a flange; a second part having an edge and an edge region adjacent to the edge. The edge region is deformable from a first condition in which the edge region is continuous and straight or has a constant radius of curvature along most of its length and a second condition in which the edge region has a continuously corrugated configuration including alternately deformed and undeformed partial edge region areas. The edge region includes a plurality of elongated apertures spaced from the edge and extending generally parallel thereto, and the deformed partial edge region areas are bounded on the side opposite to the edge by these apertures, whereas the undeformed partial edge region areas are located between said apertures. Also disclosed is a device for clamping together two parts to produce the disclosed connection.
摘要:
Process for the manufacture of an abrasive material comprising at least two binder layers formed from at least one aqueous resol I prepared from a monohydric phenol and formaldehyde (molar ratio of phenol to formaldehyde 1:(1.1 to 2.5)) by the application of a first binder layer onto a carrier material, scattering abrasive particles thereon, drying the covering layer in a horizontal dryer to displacement resistance and thereafter cooling with an air stream, application of a second binding agent layer and in similar manner to the first step, drying to imprint resistance and thereafter cooling, whereby the heating and cooling are each effected by means of an air stream through slit nozzles arranged transversely to the direction of travel of the abrasive web and, after loosely forming the product into a roll, final curing is effected on the product in roll form, the coated carrier material being conveyed at speeds above 5 m/min through the dryers which have well defined and individually controllable heating and cooling zones and the air stream has a velocity of 5 to 200 m/s at the nozzle outlets and a temperature of 20 to 300.degree. C., the air being extracted through adjacent extraction nozzles.
摘要:
A cement composition yielding alkaline-resistant bonds consisting of a mixture of a) a solution of at least one partially etherified methylol phenol and at least one partially etherified methylol alkylphenol in a solvent, the methylol phenol components having at least two positions reactive with formaldehyde and being free of alkaline catalysts used in their preparation, with b) a cement powder containing an acid catalyst, an acid-hardened, alkali-resistant cement obtained therefrom by curing and the process of their preparations.
摘要:
A tolerance compensating assembly of automatically compensating tolerances in the spacing between two structural members comprises a mounting bolt 10, a base element 4, an adjustment sleeve 6 and a driver 8. The base element 4 and the adjustment sleeve 6 form a first thread pairing G1 of a predetermined spiral direction for adjusting the adjustment sleeve 6 relative to the base element 4. The base element 4 and the mounting bolt 10 form a second thread pairing G2 in the opposite spiral direction for clamping the two structural members B1, B2. The driver 8 is a separate structural member and disengageably connected to the adjustment sleeve 6 and has a plurality of flexibly resilient clamping portions 34 spaced along its periphery, which provide for frictional contact with the thread of the mounting bolt 10 above a predetermined torsional force.
摘要:
A joining assembly for joining a pair of structural members, which joining assembly comprises a bolt having a thread and a nut-like blind rivet, said bold and said nut-like blind rivet being adapted to be inserted into mounting holes of said pair of structural members and to be threadingly engaged to each other, one of said mounting holes of said pair of structural members being formed as a polygonal mounting hole, said blind rivet being made of a resiliently deformable material and comprising a base member including a bore for receiving the thread of said bolt and having an outside provided with said helix means being of an outer diameter substantially similar to the distance between two diagonally opposite corners of said polygonal mounting hole and having a plurality of threads which are similar in number to the corners of said polygonal mounting hole, such that when said bolt is threadingly engaged into said bore of said blind rivet said base member and said helix means are folded whereby the said plurality of threads of said helix means have parts of their flanks pressed against one of said structural members.