Silyl-substituted polyalkylene oxides and methods of preparation
A novel synthetic route to new classes of polymeric coupling agents using substituted epoxy monomers is reported. In the presence of an initiating agent and tris(pentafluorophenyl)borane catalyst, substituted epoxy monomers bearing polyalkylene oxide and trialkoxysilane moieties undergo a ring-opening polymerization. The polymerization is highly versatile and allows for the fine-tuning of functional, structural, and architectural features of the resulting polymeric coupling agents. These new polyalkylene oxides substituted with organosilyl groups are capable of bonding to and modifying inorganic surfaces. The products of this invention form thin hydrophilic films.
1. A block or random telechelic copolymer having formula (II):
wherein R 1 is a branched or linear C1 to C18-saturated alkyl; a branched or linear C1 to C18-unsaturated alkyl; a methacryloxypropyl; a methacryloxyethyl; a C6 to C14-aryl; CH 2 CH 2 C n F 2n+1 where n=3 to 10; a polyalkylene oxide chain; a R 6 -polydimethylsiloxane chain where R 6 is a linear or branched C1 to C10 alkyl chain; a R 6 -polyphenylmethylsiloxane chain where R 6 is a linear or branched C1 to C10 alkyl chain ; a R 6 -polyalkylmethylsiloxane chain where R 6 is a linear or branched C1 to C10 alkyl chain; or a R 6 -polytrifluoropropylmethylsiloxane chain where R 6 is a linear or branched C1 to C10 alkyl chain;
R 2 is selected from hydrogen; acryloyl; methacryloyl; C1 to C10 saturated alkyl; C1 to C10 unsaturated alkyl, acyl; phenacyl; and trimethylsilyl;
R 3 is selected from bis(trimethylsiloxy)methylsilylpropoxymethyl; tris(trimethylsiloxy)silylpropoxymethyl; triethoxysilylpropoxymethyl; trimethoxysilylpropoxymethyl; [methoxy(PEG n )Opropyl]tetramethyldisiloxanylpropoxymethyl where n=2 to 100; methyldiethoxysilylpropoxymethyl; dimethylethoxysilylpropoxymethyl; methyldimethoxysilylpropoxymethyl; dimethylmethoxysilylpropoxymethyl; t-butyldimethylsiloxymethyl; pentamethyldisiloxanylpropoxymethyl; tetramethyldisiloxanylpropoxymethyl; trialkylsilylpropoxymethyl; and a polydimethylsiloxane chain;
R 4 is selected from bis(trimethylsiloxy)methylsilylpropoxymethyl; tris(trimethylsiloxy)silylpropoxymethyl; triethoxysilylpropoxymethyl; trimethoxysilylpropoxymethyl; [methoxy(PEG n )propyl]tetramethyldisiloxanylpropoxymethyl where n=2 to 100; methyldiethoxysilylpropoxymethyl; dimethylethoxysilylpropoxymethyl; methyldimethoxysilylpropoxymethyl; dimethylmethoxysilylpropoxymethyl; t-butyldimethylsiloxymethyl; pentamethyldisiloxanylpropoxymethyl; tetramethyldisiloxanylpropoxymethyl; trialkylsilylpropoxymethyl; and a polydimethylsiloxane chain;
x=1 to 100 and y=1 to 100.