Silicon containing macromolecule photo-initiation agent, synthesis and uses thereof

Abstract

The invention relates to a Si-containing macromolecular photoinitiator and the synthesizing method and the uses belong to the photographic polymer material field. In a general formula of the photoinitiator being (I), I is the photoinitiator with hydroxyl, i.e. the hydroxyl-containing benzoin class, benzoin ethers, alkyl-acetophenones, alkyla-acetophenones, benzophenone type, thioxcanthone derivatives, coumarone class and camphorquinone compound; R1 is the alkyl of C1-C12, or the alkyl or aryl of C1-C12 substituted by N, O, S heteroatoms; R2 and R3 are alkyls of C1-C12, the alkyls of C1-C12 substituted by N, O, S heteroatoms, or alkoxyls of C1-C12; n is equal to 3 to 50. The synthesizing method obtains the compounds of isocyanate with photoinitiator by the reaction of the hydroxyl-containing micro-molecular photoinitiator with an isocyanate group of the diisocyanate, and allows the reaction of the photoinitiator-containing compounds of isocyanate with the hydroxyl-containing siloxane macromolecular compounds. The synthesizing method is used for initiating the free radical photopolymerization, improving the speed and efficiency of producing active species by photo sensitive decomposition and reducing the micro-molecular residue and biological toxicity of coatings.

Description

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AI Technical Summary

Benefits of technology

The technical effects described by this patented inventor are that it introduces specific chemical structures onto certain types of material called siloxanes which enhance their ability to initiate curative reactions when exposed to light for creation of coatings, photosensitive printing plates, molded articles, prosthetic teeth, medical implants, and other applications such as 3D models. This results from adding more polar group(s) on these compounds than usual ones, resulting in better primers without requiring high concentrations (molar).

Problems solved by technology

Technological Problem: Current methods involve photosensitizing agents like benzene sulfonate esters, α - amino acids, dyes, quaternary salts, metal complexes, chelated therapeutic drugs, polyvinyl alcohol, polyglycerols, carboxylic acid derivatives, hydroxyacrylate groups, vinyl lactams, cyclohexane dimmers, epoxydimethanones, nitrogen bases, oxazolidone groupings, siloxanes, alkynaphthalenetides, alkaline earth metals, ion exchange resins, solvent systems containing volatile liquids, and other chemical compositions useful in various applications including coatings.

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