摘要:
A stabilized radionuclide-colloid composition useful in therapeutic radiation ablation therapies is disclosed. The composition contains a viscosity modifier layered mixed metal hydroxide and optionally an ion exchange medium to stabilize the radioactive colloid.
摘要:
Substrates such as steel or galavanized steel are treated with aminophosphonic acid compounds so as to permit better adhesion of aromatic polyether based coating formulations such as phenoxy resins.
摘要:
Aqueous acid compositions are described which comprise (a) hydroxyethylethylenediaminetriacetic acid, and (b) a compatible acid corrosion inhibitor. The compositions are useful in removing iron oxide scale from metal surfaces.
摘要:
Certain methylene phosphonic acid derivatives of aminohydrocarbyl piperazine-urea adducts are good threshold agents to prevent metal ion precipitation in aqueous solutions. These derivatives have the formula ##STR1## wherein A is ##STR2## wherein X is ##STR3## or H and wherein R is H, ammonium, an alkali or alkaline earth metal, m is 0-2, n is 2 or 3 and wherein at least one X is ##STR4##
摘要:
Compounds useful as cement set retarding additives have been found which have the formula ##STR1## wherein A, B, C and D substituents are independently selected from hydrogen, methylenephosphonic acid, or salts thereof, hydroxypropyltrialkylammonium halide, wherein the trialkylammonium moiety contains alkyl groups having from 1 to 5 carbon atoms and n is 0 to 15, and wherein said substituents include at least one methylenephosphonic acid group, or salt thereof, and at least one hydroxypropyltrialkylammonium halide group.
摘要:
The process of employing as a cement setting retarder a compound which is a phosphonomethylated derivative of a dimer or polymer which is the reaction product of ethylene dichloride or epichlorohydrin with aminoethylpiperazine wherein at least 50% of the amine hydrogen substituents are phosphonomethyl groups or an alkali metal, alkaline earth metal or ammonium salt thereof.
摘要:
The process of employing as a cement setting retarder a compound which is a derivative of dicyclopentadiene bis(methylamine) wherein at least one amine hydrogen is substituted with a methylenephosphonic acid group or a salt thereof.
摘要:
Compounds having improved properties of inhibiting the precipitation of metal ions when used in threshold amounts have been made which are derivatives of ammonia or di- or polyamines in which the amine hydrogens have been substituted with both methylenephosphonic acid groups or their salts and hydroxypropyl quaternaryammonium halide groups. Thus, ammonia can have two hydrogens replaced with methylenephosphonic groups while the third is replaced with a hydroxypropyltrimethylammonium chloride group; and three hydrogens of ethylenediamine can be replaced with methylenephosphonic groups, the fourth being replaced with a hydroxypropyltrimethylammonium chloride group.
摘要:
Ethylenediaminetetraacetic acid and the trisodium salt of N-hydroxyethylethylenediaminetriacetic acid are mixed in water at mole ratios of 80/20 to 52/48, respectively, and a manganese compound is dissolved therein with heating. The pH is adjusted to 7 and water is added to make a solution of manganese chelate which contains 6% by wt. manganese. The resulting solution has good freeze-thaw stability.
摘要:
A speaker enclosure may include a speaker enclosure frame with a back wall, a first, inner wall and a second, outer wall extending from the back wall. The first, inner wall may be longer than the second, outer wall such that a baffle attaches to the first, inner wall, but only attaches to the second, outer wall via the first, inner wall and the back wall.