摘要:
A process for the production of pourable foam inhibitor granules comprising forming an aqueous solution of a mixture of an alkali metal carboxymethyl cellulose and a nonionic cellulose ether and maintaining the aqueous solution at slightly elevated temperature until the viscosity is at least 60% of the viscosity obtained by complete swelling of the solution, adding a water insoluble foam inhibitor and a phosphate-free mixture of at least two of an alkali metal silicate, an alkali metal carbonate and an alkali metal sulfate into the aqueous mixture which is then spray-dried to form the pourable foam inhibitor granules.The invention also relates to the pourable foam inhibitor granules produced by the above process.
摘要:
C.sub.8 -C.sub.40 Alcohols, or C.sub.8 -.sub.C 40 alcohol containing one or more hydroxyl groups and onto which up to 20 moles of ethylene oxide and/or propylene oxide can be added per mole of alcohol, when added to aqueous industrial anionic surfactant concentrates, particularly concentrates of .alpha.-sulfofatty acid esters containing at least 50% by weight of the sodium salt of .alpha.-sulfofatty acid ester, significantly improve the rheological behavior thereof. The alcohols are added in quantities of from about 1 to about 15% by weight, based on the quantity of surfactant, whereupon the viscosity of the surfactant concentrate becomes at most 10,000 mPas at 70.degree. C.
摘要:
Process for reducing the viscosity of aqueous concentrates of anionic surfactants by adding thereto a small quantity of a compound containing polyglycol ether groups; and the aqueous concentrates prepared thereby.
摘要:
The hobbing machine is formed with a work table housing enclosing a work table rotatable about a workpiece axis, and indexing gear system for driving the work table; a stationary stand supports for movement parallel to the work axis a hob carriage, the latter supporting a swivel head and a hob slide movable transversely to the work axis and carrying a hob spindle; a hob driving gear system, a separate feed driving system, a differential and differential change gears are arranged in the hob carriage whereas indexing change gears are arranged in the work table housing and coupled to the differential in the hob carriage.
摘要:
Stable, pumpable, aqueous suspensions of water-insoluble, calcium-binding aluminosilicates suitable as stock suspensions comprising (A) from 20% to 55% by weight of at least one finely-divided, water-insoluble silicate compound having a calcium-binding power of at least 50 mg CaO/gm of anhydrous active substance and having the formula, combined water not shown(M.sub.2/n O).sub.x . Me.sub.2 O.sub.3 . (SiO.sub.2).sub.ywhere M is a cation of the valence n, exchangeable with calcium, x is a number of from 0.7 to 1.5, Me is aluminum or boron, and y is a number from 0.8 to 6, (B) from 0.2% to 5% by weight of at least one organic dispersing agent as follows:(1) lower alkylene oxide or glycide adducts of an N-higher alkyl/alkenyl-alkylenediamine,(2) lower alkylene oxide or glycide adducts of the reaction product of .epsilon.-caprolactam with an N-mono- or di-higher alkyl/alkenyl-alkylenediamine,(3) ethylene or propylene oxide adducts of long chain vicinal aminoalkanols,(4) the reaction product of ethylene glycol and a higher epoxyalkane and ethylene oxide adducts thereof.
摘要:
A hobbing machine for manufacturing spur and worm gears comprises a tool support provided with a support carriage movable in the direction of the axis of the blank to be machined and carrying a milling head provided with a separate feed drive which actuates via a branch gearing axial and tangential feed gear element and is connected via differential gears to a gear train for a hob. The branch gearing is arranged in the movable support carriage and includes a switch wheel which is engageable either with a drive wheel of the axial feed gear train or with the drive wheel of the tangential feed gear train and is controlled by a switching lever located on the support carriage.
摘要:
This invention relates to a granular, free-flowing detergent component which dissolves rapidly in water and which has a powder density of from 550 to 900 g/l, consisting of synthetic, essentially nonionic surfactants, inorganic supports, other organic washing aids, and water bound by adsorption and in hydrate form. The detergent component is produced by spray-drying, and more than 50% by weight thereof consists of droplet-like to rodlet-like particles having an average diameter of from about 0.02 to 1.5 mm, an average length of from about 0.1 to 5 mm, and a ratio of average diameter to average length of from about 1:1.2 to 1:10, optionally coated with a finely divided water-soluble or water-dispersible solid material as a fluidity improving agent.
摘要:
A spray-dried, high-sudsing detergent granulate is disclosed having a bulk density of not more than 450 gm/l and a high content of anionic tensides, which is characterized by a granule structure resistant to mechanical and climatic influences. The detergent granulate contains a tenside component of alkylbenzene sulfonates and, possibly, fatty alcohol sulfates, a builder component of sodium tripolyphosphate, finely crystalline sodium aluminosilicate (zeolite NaA) and sodium silicate. For the preparation, an aqueous slurry is sprayed in spray-drying equipment. The obtained spray-dried product has a porous granule structure with a mean granule size of 0.4 to 0.8 mm. The bulk density is preferably in the range from 250 to 400 gm/l.
摘要:
In the production of a spray-dried detergent containing a silicone/silica mixture as an antifoaming agent, the aqueous silicone-free detergent slurry (A) is combined in the range of the spray nozzle or in the pressure line leading to the spray nozzle under conditions whereby substantial mixing is avoided in order to avoid loss of the antifoaming action, with an aqueous dispersion (B) which contains the liquid antifoaming silicone agent, which is present in a particle size of from 0.5 to 40 .mu.m, as well as a film-forming, high-molecular-weight polymer which is soluble or swellable in water, and which is suitable for the formation of microcapsules, preferably a cellulose ether. The microcapsules are formed during the combination of the mixture (A) with the dispersion (B) at the time of spraying, or in the dispersion itself, if electrolyte salts were added to the latter before spraying.
摘要:
This invention is directed to a method of preparing block copolymers useful as foam inhibitors, which method comprises the steps of:(1) mixing (a) from 100 parts by weight of a polydimethylsiloxane that is liquid at 20.degree. C., and (b) from about 2 to 20 parts by weight of a spatially cross-linked polysiloxane resin with a molecular weight of from about 1000 to 10,000;(2) heating said mixture in the presence of a catalyst until the viscosity is at least 200 mPa.s, as measured at 20.degree. C., to form a block polymer;(3) mixing said block polymer with (c) from about 0.5 to 15 parts by weight of a silicon dioxide aerogel; and(4) heating the mixture from step (3).