Amino substituted polysiloxane

Facile and selective reactions with 3-hydroxy-2-butanone, 4-methoxybenzyl alcohol, and 3-ferf-butoxycyclohexanol were observed without any side reactions and yielded corresponding alkoxy polysiloxanes in excellent yields (Entries 1,4, and 5 Table 3.3). Amino substituted polysiloxanes are desirable products due to their utility in various technological applications, but salt-free direct methods of their preparation are quite rare. To our surprise, the Pd-nanocluster alcoholysis reaction of PMHS with 2-(2-aminoethylamino)ethanol provided corresponding amino substituted polysiloxane (Entry 2, Table 3.3) in fair yields without undergoing degradation or rearrangement reactions. However, it should be pointed out that double the amount of solvent was used for alcoholysis of amine-functionalized alcohols, since the viscosity of the reaction mixture increased rapidly (as compared to nonamine functionalized alcohols) as reaction progressed. Similarly,... 

Silicones have been claimed to improve combing, enhance feel, reduce flyaway, increase shine, reduce drying time, and lock in color [54-56], The most frequently used silicone is dimethicone, which is a polydimethylsiloxane. Other important silicones are dimethiconol, which is a dimethylsiloxane terminated with hydroxyl groups, amodimethicone, which is an amino-substituted silicone, dimethicone copolyol, which is a dimethylsiloxane containing polyoxyethylene and/or propylene side chains, and cyclomethicone, which refers to a class of cyclic dimethyl polysiloxanes ranging from trimer to hexamer ... 

Thio-ene addition is another attractive method for the attachment of organic thioether groups to polysiloxane chains. It is based on the free-radical addition of a thiol group to a vinyl-substituted siloxane or the addition of a terminal alkene to a thiol-substituted siloxane (Eq. 2). " Boileau et al. used this reaction to graft different amino acids to the polymer backbone to induce potential interactions with polar surfaces. 

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