摘要:
Disclosed is a chiller for a canister including: a drum-shaped tray with an open upper part; an inner casing inserted in the tray with a given space between the inside wall surface of the tray and the inner casing for receiving the canister; and a drainage container arranged between the inner casing and the tray for collecting cooling water discharged from the inner casing, thus preventing dew from being produced on the surface of the tray.
摘要:
A process for preparing a curing composition of a coordination complex comprising methylenedianiline (MDA) and a salt, and less than 1000 of free MDA. The curing composition may be used in curing polyurethanes and epoxy resins.
摘要:
Lubricant compositions comprising certain mixtures of esters of pentaerythritol, di-pentaerythritol, tri-pentaerythritol and higher pentaerythritol oligomers are ideally suited for use with CO2 as refrigerant in heat transfer devices provided that at least 30% by weight of the esters are esters of pentaerythritol oligomers containing 4 or more pentaerythritol monomer units and wherein a majority of the alkylcarboxylate groups are straight chain C3-6 alkanoyl groups, such as n-pentanoyl. Said mixture of alkylcarboxylate esters are shown to not only have higher than expected viscosity and exceptional CO2 miscibility, but also possess excellent lubricity, film building properties and load bearing properties even as part of a lubricant/CO2 solution.
摘要:
Rotational cast polyurethane composition prepared from a prepolymer composition comprising: a) an isocyanate-terminated polyurethane prepolymer; and b) a curative agent comprising i) a polyol; ii) an aromatic diamine; iii) a thixotropic aliphatic amine; and iv) a thixotropic colloidal additive, wherein the prepolymer comprises a product produce by the reaction of a polyol with an organic diisocyanate monomer comprising 4,4′-diisocyanato diphenylmethane (MDI), and which prepolymer comprises less than 1.0% by weight of free MDI monomer, based on the toal weight of the prepolymer, exhibits a range of enhanced physical properties compared to those obtained from prepolymers comprising a higher level of free MDI monomer.
摘要:
A method for preparing a polyurethane elastomer, the method comprising mixing an isocyanate terminated prepolymer and a nitrogen-containing organic salt to form a prepolymer mixture and reacting the prepolymer in the prepolymer mixture with a methylenedianiline metal salt coordination complex chain extender to form the polyurethane elastome. The nitrogen-containing organic salt is selected from the group consisting of an ammonium salt, an imidazolium salt, a pyridinium salt, a pyrrolidinium salt, a piperidinium salt, and a morpholinium salt.
摘要:
An arylalkenyl ether oligomer is produced by the reaction of a polyhaloalkene with a polyhydroxyaryl compound. Halogenation of the resultant oligomer produces a flame retardant having both aromatic and aliphatic bromine groups.
摘要:
The feel of skin and hair and the manageability of hair exposed to recreational water is improved by the addition of select organic polymers, e.g., charged organic polymers such as cationic organic polymers containing multiple charges. In one embodiment, excellent results are achieved when the added organic polymer(s) include polymeric quaternary ammonium compounds such as poly-DADMAC. The cationic organic polymers of the invention do not interfere with the activity of other recreational water treatments such as halogen releasing compounds and do not decompose due to the presence of halogen releasing water sanitizers, generate a detectable odor or impart noticeable color to the recreational water.
摘要:
Overbased MgO dispersions with high magnesium content and acceptably low viscosities are reproducibly prepared without gel formation by heating to 280-360° C. a mixture of MgO, selected dispersants, low MW carboxylic acids, water and a combination of high boiling hydrocarbon and organic diluent, wherein water is more than 8%, typically more than 10% of the reaction mixture. No additional solubilizing or dispersing agents, promoters or reactants such as carbon dioxide, amines, alcohols etc are needed to obtain the desired dispersions. Compositions such as lubricating oils and fuels containing the overbased magnesium dispersions as additives are also disclosed.
摘要:
An alkylated 1,3-benzenediamine compound used as a deposit-control lubricant additives for organic materials including lubricating oil, gasoline, and diesel fuels. The invention improves the oxidative stability of the lubricants and fuels by adding the alkylated 1,3-benzenediamine compound. The alkylated 1,3-benzenediamine compound is formed using a catalytic hydrogenation that alkylates the 4 and/or 6 position of the central aromatic ring.
摘要:
Polyol ester lubricant compositions comprising predominately straight chain C5-10 alkylcarboxlate esters of neopentyl alcohols, for example, straight chain C5-10 alkylcarboxlate esters of one or more of trimethylol propane, pentaerythritol, di-pentaerythritol, tri-pentaerythritol or pentaerythritol oligomers, and working fluids comprising said lubricant compositions and a hydrocarbon refrigerant, suitable for heat transfer devices including refrigeration and air conditioning systems are provided. The polyol ester lubricant compositions have a kinematic viscosity at 40° C. of 22-125 cSt and a viscosity index of greater than 140, and are characterized by having very high lubricity, excellent load carrying properties and excellent low temperature properties.