Polymeric polyamines and method for producing the same

Abstract

The present invention discloses a polymeric polyamine which can be produced by polymerizing polyoxyalkylene-amine and a linker. The linker can be anhydride, carboxylic acid, epoxy, isocyanate or poly(styrene-co-maleic anhydride) copolymers (SMA). The present invention also discloses a method for stabilizing the Ag nanoparticles with polymeric polyamine. The polymeric polyamine serving as a stabilizer or dispersant is mixed with a water solution of silver salt and then a reducer is provided to reduce the silver ions and form an organic or a water solution of Ag nanoparticles. Water or solvent of this solution can be further removed through a heating, freezing or decompression process, and thus solid content of the solution can be increased. The concentrated solution also can be diluted to obtain a stable dispersion without aggregation.

1 . A polymeric polyamine, comprising a polyoxyalkylene-amine and a linker linking with an amino end of the polyoxyalkylene-amine, wherein polyoxyalkylene-amine has a molecular weight of 200˜10,000, and the linker is selected from the group consisting of anhydride, carboxylic acid, glycidyl, epoxide, isocyanate, diisocyanate, maleic anhydride and maleated polystyrene. 
     
     
         2 . The polymeric polyamine as claimed in  claim 1 , which has a structural formula selected from the group consisting of Linker-HN—R—NH-Linker, H 2 N—R—NH-Linker, H 2 N—R—NH-Linker, H 2 N—R—NH-Linker-NH—R—NH 2 , Linker-(HN—R—NH-Linker) x  and H 2 N—R—NH-(Linker-HN—R—NH) x —H, wherein R is selected from the group consisting of dianhydride, diacid, epoxy, diisocyanate and poly(styrene-co-maleic anhydride) copolymers (SMA), x=1˜5. 
     
     
         3 . The polymeric polyamine as claimed in  claim 1 , wherein the linker is selected from the group consisting of maleic anhydride, succinic acid anhydride, trimellitic anhydride (TMA), benzene tetracarboxylic dianhydride (PMDA), phthalic anhydride, tetrahydromethyl-1,3-isobenzofurandione, dicarboxylic acid, adipic acid, succinic acid, p-phthalic, isophthalic acid, diglycidyl ether of bisphenol-A (DGEBA), 3,4-epoxycyclohexyl-methyl-3,4-epoxy cyclohexane carboxylate, toluene diisocyanate, methylen-biphenyldiisocyanate, 1,6-cyclohexamethylene-diisocyanate, methyl isopropyl ketone diisocyanate and poly(styrene-co-maleic anhydride) copolymers (SMA). 
     
     
         4 . The polymeric polyamine as claimed in  claim 1 , wherein the linker is selected from the group consisting of benzene tetracarboxylic dianhydride (PMDA), trimellitic anhydride (TMA) and adipic acid. 
     
     
         5 . The polymeric polyamine as claimed in  claim 1 , which serves as a stabilizer or a dispersant of the Ag nanoparticles. 
     
     
         6 . A method for producing a polymeric polyamine, comprising a step of reacting the polyoxyalkylene-amine with a linker having a reactive functional group, wherein the polyoxyalkylene-amine has a molecular weight of 200˜10,000, and the linker is selected from the group consisting of anhydride, carboxylic acid, glycidyl, epoxide, isocyanate, diisocyanate, maleic anhydride and maleated polystyrene. 
     
     
         7 . The method as claimed in  claim 6 , wherein the polyoxyalkylene-amine has a structural formula H 2 N—R—NH 2 , wherein R is selected from the group consisting of dianhydride, diacid, epoxy, diisocyanate and poly(styrene-co-maleic anhydride) copolymers (SMA). 
     
     
         8 . The method as claimed in  claim 6 , wherein the molar ratio of the polyoxyalkylene-amine to the linker is n: (n+1) or (n+1):1, n=1˜5. 
     
     
         9 . The method as claimed in  claim 6 , which is performed at 25° C.˜150° C. for 1˜12 hours. 
     
     
         10 . The method as claimed in  claim 6 , wherein the linker is selected from the group consisting of benzene tetracarboxylic dianhydride (PMDA), trimellitic anhydride (TMA), adipic acid, maleic anhydride, succinic acid anhydride, phthalic anhydride, tetrahydromethyl-1,3-isobenzofurandione, dicarboxylic acid, succinic acid, p-phthalic, isophthalic acid, diglycidyl ether of bisphenol-A (DGEBA), 3,4-epoxycyclohexyl-methyl-3,4-epoxy cyclohexane carboxylate, toluene diisocyanate, methylen-biphenyldiisocyanate, 1,6-cyclohexamethylene-diisocyanate, methyl isopropyl ketone diisocyanate and poly(styrene-co-maleic anhydride) copolymers (SMA). 
     
     
         11 . The method as claimed in  claim 6 , wherein the linker is selected from the group consisting of benzene tetracarboxylic dianhydride (PMDA), trimellitic anhydride (TMA) and adipic acid. 
     
     
         12 . The method as claimed in  claim 6 , wherein the polymeric polyamine produced is a stabilizer or dispersant of the Ag nanoparticles.