摘要:
A method for concentration of fine particles dispersed in a dispersion into an ionic liquid comprising, adding an ionic liquid, especially an organic ionic liquid at ordinary temperature, e.g., a salt of 1-butyl-3-methylimidazolium with PF6− to a dilute dispersion of fine particles so as to concentrate the fine particles into the ionic liquid.
摘要:
A method for concentration of fine particles dispersed in a dispersion into an ionic liquid comprising, adding an ionic liquid, especially an organic ionic liquid at ordinary temperature, e.g., a salt of 1-butyl-3-methylimidazolium with PF6− to a dilute dispersion of fine particles so as to concentrate the fine particles into the ionic liquid.
摘要:
A system for processing supercritical and subcritical fluid capable of bringing the inside of at least one processing container (1) formed in a flow passage into a supercritical or subcritical high pressure field, wherein thermal operation is applied to process fluid to apply thermal expansion to the fluid to produce a pressure difference between the processing container (1) and the outside, whereby a specified temperature and the high pressure field suitable for the processing of the supercritical or subcritical fluid can be provided in the processing container (1).
摘要:
Novel fluorinated unsaturated glycidyl ethers are prepared by reacting 1,1,1-trifluoro-2-trifluoromethyl-3-buten-2-ol or 1,1,1-trifluoro-2-trifluoromethyl-4-propen-2-ol with chloromethyloxirane in the presence of onium salts. The fluorinated unsaturated glycidyl ethers are, in turn, subject to addition reaction with hydrosilanes in the presence of transition metal catalysts, obtaining novel silicon-modified glycidyl ethers or fluorinated organic silicon compounds.
摘要:
Novel siloxane compounds containing a SiH group, an alkoxy or epoxy group-containing organic group attached to a silicon atom, and a perfluoropolyether group-containing organic group, each at least one per molecule, are useful tackifiers for imparting good adhesion to various resins and even fluorinated silicone resins.
摘要:
An organopolysiloxane composition comprising an organopolysiloxane and compounded therein a silica fine powder treated with a silazane compound containing a group represented by the following formula: ##STR1## wherein Rf represents a fluorine-containing organic group; R.sup.2 represents a monovalent hydrocarbon group containing no fluorine atom; R.sup.3 represents a divalent hydrocarbon group; and c is an integer of 0, 1 or 2. The composition has superior release properties and transparency.
摘要:
A novel fluorine-containing organosilicon compound represented by Formula (I): ##STR1## wherein n represents an integer of 0 or more, R.sup.1 and R.sup.2 may be the same or different and each represent a hydrogen atom or a fluorine atom, and R.sup.3 represents an alkylene group having 1 to 6 carbon atoms.This compound is useful as silica treatments, or surface treatments capable of imparting water repellency, oil repellency, etc. on the surface of glassware or the like.
摘要:
The organopolysiloxane composition is useful as a potting or encapsulating material having a gel-like consistency for protecting electronic components even at an extremely low temperature as is encountered in the space industry. The composition is basically of the type in which crosslinks are formed by the addition reaction between silicon-bonded vinyl groups in an organopolysiloxane and silicon-bonded hydrogen atoms in an organohydrogenpolysiloxane but the outstanding cold resistance of the gel-like material obtained from the composition is imparted by incorporating specific silethylene-containing units of the unit formula OSiMe--CH.sub.2 CH.sub.2 --SiMe.sub.2 O.sub.0.5 into the organopolysiloxane in a specified molar content.
摘要翻译:有机聚硅氧烷组合物可用作具有凝胶状稠度的灌封或封装材料,即使在空间工业中遇到的极低温下也能保护电子元件。 组合物基本上是通过有机聚硅氧烷中与硅键合的乙烯基与有机氢聚硅氧烷中与硅键合的氢原子之间的加成反应形成交联的类型,但由组合物获得的凝胶状材料的出色的耐寒性为 通过将单元式OSiMe-CH 2 CH 2 -SiMe 2 O 0.5的特定的含有亚乙烯基的单元以特定的摩尔含量加入有机聚硅氧烷中。
摘要:
A method uses a high density compressed liquefied gas in cleaning applications in a closed recycle system to achieve effective and economical cleaning without using any high pressure generating device. The closed recycle system can include a pressure cleaning vessel provided with a plurality of nozzles for pre-cleaning, atmospheric containers for expanding compressed liquid, sound wave generators and an agitator. The system can also include a pressure recovery vessel provided at a lower portion than the pressure cleaning vessel and having a detachable drain cylinder suspended from under the pressure recovery vessel and also having a temperature regulator for receiving contaminated liquid that has been pre-cleaned from a pressure cleaning room. The pressure recovery vessel can be connected with a high density compressed liquefied gas supply cylinder through communication with vapor therein to eliminate enriched liquid with contaminants through the drain cylinder as well as removing and transferring solvent by the vapor occurred from the temperature regulator.
摘要:
A casing of a fixed disc memory unit consisting of a case body and a covering member jointly forming the casing with an air-tight sealing of a rubbery gasket therebetween can be imparted with very reliable moisture-proofness of sealing by forming the rubbery gasket by the FIPG method using a curable rubber composition comprising: (a) a fluorocarbon-containing organosiloxane polymer containing vinyl groups and consisting of the recurring units each represented by the general formula--[--SiMe.sub.2 --CH.sub.2 CH.sub.2 --Rf--CH.sub.2 CH.sub.2 --SiMe.sub.2 --O--]--,in which Rf is a fluorinated divalent polyether group; (b) an organohydrogenpolysiloxane or a fluorocarbon-containing organohydrogensiloxane having, in a molecule, at least two hydrogen atoms directly bonded to the silicon atoms; and (c) a catalytic compound in an amount sufficient to effect the addition reaction between the components (a) and (b).