摘要:
A polyglycerol composition contains diglycerol, triglycerol, and tetraglycerol each in a content of 5 percent by weight or more, has a total content of diglycerol, triglycerol, and tetraglycerol of 75 percent by weight or more, has a total content of higher polyglycerol components of 10 percent by weight or less, the higher polyglycerol components each having a degree of polymerization of 7 or higher, and is substantially free from chlorine atom. A process prepares a polyglycerol composition by reacting glycerol and/or a polyglycerol with glycidol in the presence of an activated carbon catalyst.
摘要:
An ejector capable of generating a high negative pressure capable of sucking and conveying fine metal pieces such as cuttings, for example, in a case of using the ejector as a driving source for a fluid conveyor, comprising a convergent-divergent nozzle having a throat formed between a suction port and a discharge port in which jet blowing holes are formed in the convergent-divergent nozzle for jetting a jet stream from the upstream to the downstream of the throat thereby forming a negative pressure, wherein pressure control holes are formed being opened to the downstream of the jet blowing holes for communicating a pressure space at a level higher than a negative pressure formed by the jet stream and lower than a static pressure of the jet stream and the inside of the convergent-divergent nozzle.
摘要:
A method of operating an air-supplied type coating booth in which conditioned air is enforced from an air supply blower downwardly to the inside of a coating booth and then discharged to the beneath of the booth floor by an exhaust blower, in which the booth operation is stopped after memorizing the balanced flow rates for the supply blower and the exhaust blowers kept just before the completion of the booth operation, and the supply blower and the exhaust blower are automatically set to the above-mentioned balanced flow rates respectively upon re-starting the booth operation again. Balanced and stable booth operation where no air streams flow into or out of the inlet and the exit can be attained rapidly at the start of the booth operation.
摘要:
Disclosed is a polishing composition for CMP which contains a polyglycerol derivative (A) represented by following Formula (1): RO—(C3H6O2)n—H (1) wherein R represents one selected from a hydroxyl-substituted or unsubstituted alkyl group having one to eighteen carbon atoms, a hydroxyl-substituted or unsubstituted alkenyl or alkapolyenyl group having two to eighteen carbon atoms, an acyl group having two to twenty-four carbon atoms, and hydrogen atom; and “n” denotes an average degree of polymerization of glycerol units and is an integer of 2 to 40; an abrasive (B); and water.
摘要翻译:公开了一种CMP用的研磨用组合物,其含有下述通式(1)表示的聚甘油衍生物(A):&lt;线内式记载=“直列式”末端=“铅”→RO-(C 3 H 6 O 2) nH(1)<?in-line-formula description =“In-line formula”end =“tail”?>其中R表示选自羟基取代或未取代的具有1至18个碳原子的烷基,羟基 - 具有2至18个碳原子的取代或未取代的烯基或多聚烯基,具有2至24个碳原子的酰基和氢原子; “n”表示甘油单元的平均聚合度,为2〜40的整数。 研磨剂(B); 和水。
摘要:
A lactone compound represented by following General Formula (1), such as ε-caprolactone, is reacted in the presence of a powdered activated carbon where necessary with an initiator such as a polyhydric alcohol, an aliphatic alcohol, or an aliphatic carboxylic acid to thereby yield, for example, a polylactone, a polylactone alkyl ether, or a polylactone alkyl ester.[Chemical Formula 1] Wherein R1 is an alkylene group having two to eighteen carbon atoms which may be substituted with one or more alkyl groups each having one to ten carbon atoms.Accordingly, a target compound can be produced in a high yield with high quality, from which the catalyst can be easily removed.