Abstract:
The present invention provides specific alkoxylation products, a process for preparing them, compositions comprising these alkoxylation products, and their use.
Abstract:
Novel alkoxylation products containing lateral hydroxyl groups or bearing lateral C—C double bonds and a process for preparing them by means of an alkoxylation reaction of halogenated alkylene oxides using double metal cyanide (DMC) catalysts and subsequent elimination of chlorine.
Abstract:
The present invention provides polysiloxane-polyether copolymers comprising at least one polyether moiety, characterized in that there is at least one polyether moiety capped with at least one —O—C(O)—O—R″ unit where R″ is identical or different alkyl moieties, a process for preparation thereof and use thereof, especially for polyurethane foam production.
Abstract:
An apparatus provides for the non-destructive testing of samples. The samples can in this respect also be formed from critical materials which change their properties during manufacture, for example on a hardening or solidification. In an apparatus in accordance with the invention, at least one ultrasonic pressure wave transducer is arranged at a forward cell. The forward cell is filled with a liquid and is placed with an open side at one side onto a surface (A) of a conversion prism, in the form of a solid body, so that the liquid and the surface (A) are in touching contact. The conversion prism is placed with a further surface (B) onto a surface of a sample to be tested. At least one ultrasonic pressure wave transducer can be positioned or is positioned at the forward cell at at least two positions (T1, T2) so that the positions are arranged at an equal spacing from the center of the surface (A) of the conversion prism, said surface being placed onto the sample.
Abstract:
Novel silicone polyethers by alkoxylating polymerization of epoxide monomers with (poly)organosiloxanes starting from an α,ω-dihydroxysiloxane as starter by means of DMC catalysis and process for preparing them.
Abstract:
Process for the preferential alkoxylation of silicone-polyether copolymers either alone or in compositions thereof containing, for example, excess polyether by use of double metal cyanide catalysts.
Abstract:
The present invention provides compounds which are liquid at a temperature of 20° C. and a pressure of 101325 Pa and are of the general formula (I) [R—O(SO)a(EO)b(CH2CHCH3O)c(BO)d]x—[PO—(OH)3-x]y—R4z, where R=cardanol radical, R4=H, M+ or alkyl having 1 to 3 C atoms, SO=styrene oxide, EO=ethylene oxide, BO=butylene oxide and a=0 to 3, b=0 to 100, preferably at least 1, c=0 to 20, d=0 to 3, x=1 to 3, y=0 or 1, with the proviso that y+z is =1, that if z=1 also x is =1, that when a, c and d are =0, b is from 1 to 15, preferably from 6 to 10, that when c or d is other than 0, one of the other indices a to d is likewise other than 0, and that the sum a+b+c+d is greater 3, a process for preparing them, compositions comprising these compounds, and the use thereof.
Abstract:
A system reclaiming contaminated water includes a heat exchanger that receives the contaminated water and converts at least a portion of the contaminated water into steam and collects at least a portion of the contaminants within the heat exchanger. A thermal transfer fluid is heated by a solar concentrator during daytime and by a biofuel combustion device during nighttime. The heated fluid is circulated through the heat exchanger to heat the contaminated water. A steam engine is coupled to a generator, the steam engine receives the steam from the heat exchanger to drive the generator to provide power for the system. Steam exhausted from the steam engine is supplied to supplemental heat loads. The collected contaminants are directed to an evaporation device to remove residual liquid.
Abstract:
Novel silicone polyether copolymers of inverse structure of the formula 1, characterized in that no unsaturated functional groups caused by side reactions or conversion products thereof are present in the copolymer, and a process for preparation thereof, in which a polyether modified terminally and/or laterally with alkoxysilyl groups is reacted with silanes and/or siloxanes which bear one or more hydrolysis-labile groups, in a hydrolysis and condensation reaction.