Polyethylene glycol diamine

Ethylene diamine tetra-acetic acid (EDTA) Polyethylene glycol ethers Carbox5unethyl cellulose salts... 

Several recent patents describe the benefits of polymers in LDLDs (Table 7.15). Polymers are well known to interact with surfactants and provide many interesting properties. Some of the benefits claimed in the patents summarized in Table 7.15 are soil resistance due to amino acid copolymers, polyethylene glycol as a grease release agent, increased grease removal from polyoxyethylene diamine, enhanced foam volume and duration, increased solubility, and enhanced mildness by ethylene oxide-propylene oxide copolymers. As described in these various patents, the addition of polymers to LDLDs can aid performance in many important attributes of the product. 

It is well known that alkali and alkaline earth cations are very difficult to complex due to the configuration of the rare gas electronic structure of these ions. Fortunately, some specific ligands are known, such as aprotic dipolar solvents (dimethylformamide, sulfolane, dimethylsulfoxide, N-methyl pyrolidone and so on), aminoxides, phosphinoxides, glymes and polyethylene glycols, crown ethers and cryptates, bidentate amines (tetramethyl ethylene diamine, 1,10 phenanthroline, etc. [14, 53, 61, 68]. 

Covalent cross-linking [eg, covalent cross-linker polyethylene glycol (PEG)-diamine, adipic acid dihydrazide, glutaraldehyde. etc] is important for increases in physical and mechanical properties of the gel because the loss of water from the gel matrix causes plastic deformation [31,32]. 

Polyethylene glycol (PEG) is another well-known molecule used to reduce protein adsorption and/or platelet adhesion. Surface enrichment of a triblock oligomeric PEG containing additive from a polyurethane matrix was reported [54,55]. The authors used PEG as the active groups to suppress protein and platelet adhesion. The authors first synthesized a methylene diphenyl diisocyanate (MDI)-poly (tetramethylene oxide) (PTMO) 1000 prepolymer with a MW of approximately 4750 (PU4750), and then this prepolymer was terminally functionalized with mono amino-polyethylene oxide (PEG) with different MW (PEO550, 2000, or 5000, Table 2.3). This triblock copolymer was mixed with a polyurethane (MDI/ PTMO 1000/ethylene diamine (ED)) at different ratios in dimethylformamide (DMF) and cast into polymer films. The surface compositions of these films were evaluated by XPS. 

An attractive example of dual functional agents for biological imaging applications was reported by Sun et al. A fluorescent ruthenium complex was immobilised on to the surface of magnetic nanoparticles via 3-(3,4-dihydroxyphenyl) propanoic acid (DHPPA) and 0,0 -bis(2-aminopropyl) polypropylene glycol-A/ock-polyethylene glycol-i/ock-polypropylene glycol (PPG-PEG-PPG-diamine). ... 

Polyethylene glycol (PEG) has drawn considerable attention as a green reaction medium for organic synthesis [92]. Alkynes are successfiilly employed for the synthesis of Qxs using PdCyCuCl2 as the catalyst system in PEG-400 and water (8 2 Scheme 2.14) [93], The solvent system assists the oxidation of the alkyne to form the 1,2-dione as the intermediate species that undergo PEG-assisted cyclocondensation with the 1,2-diamine to form the Qx. 

An alternative to the use of a dipolar aprotic solvent is to use a nonpolar medium and a cation solvating additive. The use of beta-diamines to solvate and enhance the reactivity of organolithium compounds is well known and documented [15]. Polyethylene glycol derived bases were known to be self-solvating as early as 1963 [16]. 

The best physical properties are obtained with polyethylene adipate as the backbone. After the manufacture of the prepolymer with the polyethylene adipate and NDI, the polyurethane was completed with the addition of BDO. The use of diamines gave too fast a reaction for successful processing. Water and glycols also were used for cross-linking. Glycols do not give the C02 gas the water chain extension does. 

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