Abstract: The present invention relates to polyester polyols with low functionality and a process for their production, to prepolymers prepared from these polyester polyols and a process for their production, and to polyurethanes prepared from these polyester polyols and/or from these prepolymers, and to processes for their production. These polyester polyols are produced in a two-step process. In the second step of this two-step process, one or more cyclic ester monomers is reacted with one or more polyester polyols at low temperatures.

Abstract: The invention relates to a process for the production of liquid, storage-stable isocyanate mixtures with a low color index having carbodiimide-(CD) and/or uretone imine (UI) groups, the isocyanate mixtures that can be obtained by this process and their use for the production of blends with other isocyanates or for the production of isocyanate group-containing pre-polymers and also of polyurethane plastics, preferably polyurethane foamed plastics.

Abstract: The invention is directed to an improved, reliably performable process for preparing triallyl isocyanurate (TAIC) by Cu2+-catalysed rearrangement of triallyl cyanurate (TAC) at least 90° C. According to the invention, TAC and, if required, also a Cu2+ catalyst and solvent are fed continuously to a start reaction mixture after onset of the initially inhibited isomerization reaction, the isomerization is performed at from 90 to 160° C. and an amount of reaction mixture equivalent to the amount of reactant is drawn off continuously and sent to the workup. Preference is given to effecting the isomerization in TAIC as the reaction medium.

Abstract: The invention relates to a marine-vessel transmission having an input-drive shaft (10), which extends along an input-drive shaft axis (A) and on which an input-drive shaft gearwheel (12) is arranged, a first pinion shaft (14), which extends coaxially with respect to the input-drive shaft (10) and on which a first pinion (16) is arranged, a second pinion shaft (24), which extends parallel to the input-drive shaft (10) and on which a pinion shaft gearwheel (28), which engages with the input-drive shaft gearwheel (12), and a second pinion (26) are arranged, an intermediate shaft (18), on which a spur gear (20), which engages with the first pinion (16) and the second pinion (26), and a bevel pinion (22) are arranged, and an output-drive shaft (30), which extends along an output-drive shaft axis (P) which runs at an angle (?) of more than 75° with respect to the input-drive shaft axis (A), and on which a spur bevel gear (31) is arranged, which forms a bevel drive with the bevel pinion (22).

Abstract: Isocyanate mixtures comprising: (a) NCO prepolymers having an NCO content of 1.5 to 18 wt. %; and (b) 1 to 40 wt. % of monomeric 2,2?-diisocyanatodiphenylmethane, based on the isocyanate mixture; wherein the isocyanate mixture has a total NCO content of from 2 to 22 wt. %; polyisocyanate polyaddition products prepared therefrom; and methods of making the same.

Abstract: Polyurethane prepolymers are described which are prepared from 2,4?-diiso-cyanate diphenylmethane (2,4?-MDI), a polyol component and an aliphatic diisocyanate. These prepolymers can be cured with aliphatic, cycloaliphatic and/or aromatic amines to form a cured urethane elastomer. In comparison to cured urethane elastomers based on monomeric 2,4?-MDI, these prepolymers provide elastomers with extended pour life, i.e. they exhibit a slower rate of viscosity buildup after curative and prepolymer are mixed which results in a reduced propensity to crack during the curing process and gives the opportunity to cast larger parts. In comparison to polyurea/urethanes prepared from cured TDI-prepolymers and which optionally include H12-MDI, the prepolymers of the invention have better health and safety aspects.

Abstract: The present invention relates to polyurethane/polyurea elastomers (PU elastomers) having improved processing characteristics, such as for example extended casting time and reduced brittleness, and occupational health and safety advantages, such elastomers being suitable for replacing elastomers based on TDI prepolymers in comparable applications, and to a process for their production and their use.

Abstract: The present invention is directed to a process for the isolation of tris(2,3-dibromopropyl)isocyanurate. The process uses an adsorbent which promotes easy conversion into a solid form of TDPI. The invention also includes to the solid TDPI product prepared in this way and its use in providing flame retardancy to plastics.

Abstract: The invention is directed to a vertically and horizontally-controlled, retractable aerial platform mountable on the bed of a vehicle for supporting a person or materials. The aerial platform includes a base, at least one support arm, a first support member, a second support member, a platform, and actuation means. The aerial platform may further include a collapsible frame. The aerial platform is vertically and horizontally-controlled, allowing a workman to adjust both the height and extension distance of the platform so that work functions can be readily performed. The aerial platform is portable, compact and suitable for use in a variety of commercial vehicles.

Abstract: Truncated terminal deoxynucleotidyl transferase (TdT) derivative from calf thymus, characterized in that the derivative in comparison to the native TdT is N-terminally truncated by up to 161 amino acids and has a 20- to 30-fold higher enzyme activity in solutions containing Co2+ ions, and its recombinant production and use.

Abstract: A device and method for identifying the tubes in a tubesheet, including locating a support element along a portion of the tubesheet with at least one means for identifying the location or condition of the adjacent tubes.

Abstract: A method of increasing cell proliferation by modulating levels of EVI and related genes. Activation of EVI-1, PRDM16, or SETBP1 can increase the proliferation rate, self renewal and/or in vitro and/or in vivo survival and/or engraftment of human cells, either in vitro or in vivo. The gene modulation can be performed by various means, including traditional cloning methods and retroviral-based gene activation methods. The method can also be used to more efficiently deliver gene-corrected cells to a patient in need of treatment.

Abstract: A single-side contacted solar cell and method for production of a single-side contacted solar cell provide a direct arrangement of a contact grid on one side of an absorber layer. A free surface of the contact grid is coated with an electrically non-conducting insulation layer. An emitter layer is deposited on a whole surface such that the contact grid is arranged between the absorber layer and the emitter layer. The emitter layer is provided with a contact layer. For back face contact, the emitter layer is arranged on a back face of the absorber layer to avoid additional absorptive losses.

Abstract: The present invention relates to high-quality polyurethane and polyurethane urea elastomers which exhibit unique combinations of processing characteristics, oxidation resistance, mechanical and mechanical/dynamic properties in particularly demanding applications. These polyurethane elastomers and polyurethane urea elastomers are based on novel polycarbonate polyols.

Abstract: An excellent surface finishing material for indoor and outdoor facilities which ensures a given usable operating time and suppressed adhesion of the surface after curing is produced by reacting an A-side composed mainly of a urethane prepolymer having terminal isocyanate groups and a B-side composed mainly of a polyol containing a crosslinker and a filler. The prepolymer is the reaction product of a polyisocyanate composed of at least 50% by weight 2,4?-MI with a polyol. The filler contains an acid filler having a pH of less than 7.

Abstract: A method for grit blasting tubes and for blowing swabs through tubes, automatically sensing that the swab has passed through the tube, and logging the event. Also, various methods are used for inserting the swabs into the tubes efficiently.

Abstract: A seal for sealing against the interior of a tube includes upper and lower rigid plates with flexible plates between them, which are compressed to form a seal.

Abstract: A device and method for vacuuming solid particles out of a chemical reactor tube.

Abstract: The present invention relates to polyester polyols with low functionality and a process for their production, to prepolymers prepared from these polyester polyols and a process for their production, and to polyurethanes prepared from these polyester polyols and/or from these prepolymers, and to processes for their production. These polyester polyols are produced in a two-step process.

Abstract: The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures of low color number and which contain carbodiimide (CD) and/or uretonimine (UI) groups, the isocyanate mixtures obtainable by this process, and to a process for the preparation of blends of these isocyanates with additional isocyanate components and to a process for the preparation of prepolymers containing isocyanate groups and of polyurethane plastics, preferably polyurethane foams.