摘要:
The present document describes the use of an inhibitor for cationic polymerization as an additive to a thermocurable composition based on at least one cationically polymerizable organic material and an initiator for cationic polymerization in the form of an onium compound or a compound of the formula (I)[M.sup.+n (L).sub.x ].sup.n+ nX.sup.- (I),in which n is 2 or 3, M is a metal cation selected from the group comprising Zn.sup.2+, Mg.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cr.sup.2+, Ru.sup.2+, Mn.sup.2+, Sn.sup.2+, VO.sup.2+, Fe.sup.3+, Al.sup.3+ and Co.sup.3+, X.sup.- is an anion selected from the group comprising PF.sub.6.sup.-, AsF.sub.6.sup.-, SbF.sub.6.sup.-, BiF.sub.6.sup.-, derivatives of these anions in which at least one fluorine atom has been replaced by a hydroxyl group, and CF.sub.3 SO.sub.3.sup.-, or in which up to 50% of the anions X.sup.-, based on the total amount of anions, may be any desired anions, L is water or an organic .sigma.-donor ligand which contains, as bonding sites, one or more functional radicals selected from the group comprising --CO--, --CO--O--, --O--CO--O-- and --O-- and forms .sigma.-bonds with the central atom via the oxygen atom or atoms, and x is an integer from 0 to 6, and where the ligands L may be different within said definitions, or as an additive to components for the preparation of a composition of this type for avoiding initiator decomposition products which are formed due to moisture and reduce the thermal stability of the composition, and/or for increasing the thermal stability of the composition for a limited time before curing.
摘要:
Curable mixtures, containing,(a) at least one bisphenol diglycidyl ether based on bisphenol A, hydrogenated bisphenol A or bisphenol F,(b) as a curing catalyst, a colorless or slightly yellow solution of a metal complex compound of the formula I]Me(H.sub.2 O).sub.x (Lm).sub.y ].sup.2+ (A.sup..crclbar.).sub.2 (I), in whichMe is a divalent metal from the group comprising Zn, Cd, Sn, Pb, Ca or Mg,Lm is a saturated cyclic ether having 5 to 7 ring atoms, a linear or cyclic saturated aliphatic ether compound or a mixture of the ether and the ether compound, the ether and the ether compound having a boiling point of at least 60.degree. C., andA is an anion of the formula BF.sub.4.sup..crclbar., PF.sub.6.sup..crclbar., AsF.sub.6.sup..crclbar. or SbF.sub.6 .sup..crclbar.,x is the number 4, 5 or 6 and y is zero or the number 1 or 2, the sum of x and y always being 6, the complex being dissolved in an excess of the corresponding ether or the corresponding ether compound,(c) a sterically hindered mononuclear or polynuclear phenol, a phosphite of the formula II or III ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 independently of one another are each phenyl, alkyl-substituted phenyl having 1-12 carbon atoms in the alkyl radical or alkyl having 1 to 20 carbon atoms, or a mixture of a sterically hindered mononuclear or polynuclear phenol and a phosphite of the formula II or III and, if appropriate,(d) as a reactive diluent, up to 25 parts by weight, relative to 100 parts by weight (a), of at least one diglycidyl ether of 1,4-butanediol, 1,6-hexanediol or neopentyl glycol or a cresol glycidyl ether and, if appropriate,(e) as an adhesion promoter, an organic silane, titanate or zirconate, can be cured rapidly and give transparent mouldings which are resistant to yellowing. They are particularly suitable for sheathing or embedding opto-electronic components.
摘要:
The invention relates to an apparatus for determining shoe size by examination of a foot, which device is portable, consumes relatively little energy and is entirely free of mechanical components. The apparatus is of the type in which radiant energy emitters and radiant energy sensors are provided in opposed, spaced relationship and measurement is achieved by interposing the foot therebetween. Discrete emitters and sensors are provided along the length and width of the foot in dedicated emitter/sensor pairs which are spaced from other such pairs by a distance not exceeding the dimensional difference between consecutive shoe sizes. In various embodiments, correlation is maintained between emitter/sensor pairs through spatial arrangement, time division, multiplexing and combinations thereof, as well as through diverse modulation. At the same time, correlation between adjacent pairs is kept low to avoid cross-interference effects.
摘要:
Polysiloxanes containing hydroxyl groups are manufactured by reacting polysiloxanes containing alkoxy groups with aliphatic or cycloaliphatic-alipatic diols in the presence of a catalyst at elevated temperatures. The new polysiloxanols can be used as modifiers for organic resins, such as urethane resins or epoxide resins, and give flexible hydrophobic plastics having valuable mechanical properties.
摘要:
A fluid filter comprising a housing, a releasable cover and a replaceable filter having a filter body and two end plates. The filter is placed on a housing standpipe which has on its free side, facing the cover, an axially displaceable endpiece. The endpiece is preloaded in the expulsion direction and in that position is blocked by a locking system against insertion which prevents the cover from connecting with the housing. An unlocking device guided by the filter unlocks the locking system and allows insertion of the endpiece. The locking system is formed by locking tabs which are radially movable, and each have a locking face facing in the axial direction. The tabs are preloaded in the locking direction and each lock the endpiece in its expelled position against axial insertion relative to the standpipe. The tabs can be radially moved into their unlocking position by the unlocking device.
摘要:
The present invention relates to a process for purifying a gas mixture comprising dinitrogen monoxide, at least comprising the treatment of a gas mixture G-0 comprising dinitrogen monoxide to obtain a gas mixture G-A, at least comprising the absorption of the gas mixture G-0 in a solvent mixture S-I to obtain an offgas stream and a composition C-A, and the desorption of a gas mixture G-1 from the composition C-A to obtain a solvent mixture S-I′, subsequent condensation of the gas mixture G-A to obtain a liquid composition C-1 comprising dinitrogen monoxide and a gaseous mixture G-K, wherein the gaseous mixture G-K is recycled into the process.
摘要:
A fluid filter comprising a housing, a releasable cover and a replaceable filter having a filter body and two end plates. The filter is placed on a housing standpipe which has on its free side, facing the cover, an axially displaceable endpiece. The endpiece is preloaded in the expulsion direction and in that position is blocked by a locking system against insertion which prevents the cover from connecting with the housing. An unlocking device guided by the filter unlocks the locking system and allows insertion of the endpiece. The locking system is formed by locking tabs which are radially movable, and each have a locking face facing in the axial direction. The tabs are preloaded in the locking direction and each lock the endpiece in its expelled position against axial insertion relative to the standpipe. The tabs can be radially moved into their unlocking position by the unlocking device.
摘要:
Centrifuges, in particular for a lubricant oil in an internal combustion engine, are provided with a housing which comprises a base, a lid forming the second part of the housing and connectable to the base and a rotor arrangeable in the housing. Each centrifuge is embodied in the form of a modular unit which is assembled with the aid of modular system parts, wherein the modular system comprises different bases, and/or different lids and/or different rotors which can be assembled in the form of different combinations in such a way that different centrifuges are obtained.
摘要:
The invention relates to a centrifuge for the cleaning of a liquid, in particular a lubricant oil of an internal combustion engine. Said centrifuge comprises a housing, at least one bearing element on the housing side and a rotor which is rotatably mounted thereon. The rotor is composed of at least two parts, an inner part for accommodating the bearing and a part for retaining impurities in an impurity collection zone, wherein said part may be detached from the inner part for maintenance of the centrifuge. The centrifuge is characterized in that the/each bearing element is an element composed of a first bearing material and comprises one or more first smooth bearing surfaces. The inner part, embodied as a single piece, is made of a second bearing material and provided with one or more second smooth bearing surfaces. First and second bearing surfaces cooperate directly among each other, and the first and second bearing materials form a pair of smooth bearing materials.
摘要:
The present invention relates to a process for purifying a gas mixture comprising dinitrogen monoxide, at least comprising the treatment of a gas mixture G-0 comprising dinitrogen monoxide to obtain a gas mixture G-A, at least comprising the absorption of the gas mixture G-0 in a solvent mixture S-I to obtain an offgas stream and a composition C-A, and the desorption of a gas mixture G-1 from the composition C-A to obtain a solvent mixture S-I′, subsequent condensation of the gas mixture G-A to obtain a liquid composition C-1 comprising dinitrogen monoxide and a gaseous mixture G-K, wherein the gaseous mixture G-K is recycled into the process.