摘要:
The present invention relates to heat-curing sealant compositions including at least epoxy resin, dicyanodiamide or an amine complex of a Lewis acid, polyurethane polymer (PUP) containing isocyanate groups and polyaldimine. These single component sealant compositions are characterized by a rapid skin formation and high tensile strength. Because of the short skin formation time, said compositions are optimally suitable for use as sealants in autobody work because they can be excellently layered on top of same.
摘要:
Process for the preparation of N-vinylcarboxamides by pyrolysis of a compound of the formula CH3—CH(CN)—N(R)—CO—R1 (I), in which R and R1 are H or C1- to C6-alkyl, in the presence of solids which are doped with alkali metal or alkaline earth metal ions, under reduced pressure at a temperature of from 330 to 750° C. with elimination of hydrogen cyanide, cooling, separation and isolation of the reaction products, a solid arranged in a tubular reactor being treated at a temperature in the range from 0 to 250° C. with a solution of an alkali metal and/or alkaline earth metal base, the solution being discharged, the remaining solvent which adheres to the catalyst thus obtainable being evaporated and said catalyst then being heated to a temperature of at least 380° C. for activation.
摘要:
A process for the hydrolysis of polymers comprising vinylcarboxamide units by heating polymers comprising vinylcarboxamide units in an aqueous medium in the presence of acids or bases, wherein an aqueous solution or dispersion of a polymer comprising vinylcarboxamide units and an aqueous solution or a base or acid are fed continuously to a tubular reactor at elevated pressure, from 0.05 to less than one equivalent of a base or acid being used per vinylcarboxamide equivalent and the mixture being passed through the tubular reactor at a temperature of >100° C. to 250° C., depressurized and cooled.
摘要:
The invention relates to heat-curing sealing compound compositions comprising at least epoxy resin, a heat-activatable hardening agent or accelerators (B) for epoxy resins, isocyanate group-containing polyurethane polymer (PUP) and a special polyaldimine. Said single-component sealing compound compositions are characterized by a good skin formation time and extraordinarily good storage stability and low blistering. Due to these properties, said sealing compound compositions are optimally suitable for use as sealants in autobody work because they can be excellently coated with a KTL paint.
摘要:
The disclosure relates to a composition having at least one radically polymerisable monomer M; at least one radical former, at least one epoxide resin A including an average of more than one epoxide group per molecule, and at least one compound of formula (I). Such compositions are suitable as adhesives, sealants or coatings. Shortly after the application thereof, they have a high initial strength and, after further hardening at room temperature, they reach a high level of final strength.
摘要:
The invention relates to a vacuum cleaner comprising a lower housing part, on which wheels are mounted for moving the vacuum cleaner along a floor surface, and which forms a dirt collection container with a suction inlet to which a suction hose is connectable, and an upper housing part which is mountable on the lower housing part and accommodates an electrically drivable suction unit, and an electric supply cable for connecting the suction unit to an electrical voltage source. In order to develop the vacuum cleaner so that it is easier to handle, and the supply cable and the suction hose can be held in a simple way for storage on the vacuum cleaner and removed from the vacuum cleaner for use, it is proposed, in accordance with the invention, that the vacuum cleaner have a cable receptacle for storing the supply cable and a hose mount for storing the suction hose, the cable receptacle surrounding the upper housing part on the outside in the circumferential direction, and the hose mount being arranged below the cable receptacle.
摘要:
The invention relates to two-component or multicomponent compositions comprising at least the following ingredients: a) at least one (meth)acrylate; b) at least one compound of formula (I); c) at least one inorganic salt or a metal complex compound of at least one metal selected among the group encompassing the transition metals; and d) at least one peroxide or at least one perester or at least one hydroperoxide. A first component K1 contain at least ingredient c) while a second component K2 contains at least ingredient d). The inventive compositions are characterized in that oxygen inhibition is prevented or drastically reduced when the same are hardened. Said compositions are particularly suitable as adhesives, sealants, and coatings.