Catalyst-supported organic-inorganic hybrid composite particles capable of regulating polyurethane reaction rate, and preparation method therefor

A method of preparing a catalyst-supporting organic-inorganic hybrid composite particle, the method comprising:

• preparing a catalyst-supporting particle by mixing and reacting an alkoxy silane-functionalized polyurethane precursor represented by Chemical Formula 1 below with tetraethyl orthosilicate;
• and
• preparing the catalyst-supporting organic-inorganic hybrid composite particle by supporting a catalyst on the catalyst-supporting particle,
• wherein, in Chemical Formula 1, A comprises a hydrophobic segment and three or more hydroxy groups, B comprises two or more isocyanate groups, C comprises both a hydroxy group and an alkoxy silane group or both an amine group and an alkoxy silane group, and D comprises a hydrophilic segment and two or more hydroxy groups,
• wherein A in Chemical Formula 1 is a polypropylene triol represented by Chemical Formula 3 below:
• in Chemical Formula 3, m is an integer from 1 to 50, n is an integer from 0 to 50, and p is an integer from 0 to 50,
• wherein B in Chemical Formula 1 is 2,4-toluene diisocyanate represented by Chemical Formula 4 below:
• wherein C in Chemical Formula 1 is methoxy (polyethyleneoxy) propyl trimethoxysilane represented by Chemical Formula 12 below:
• in Chemical Formula 12, n is an integer from 1 to 50, and Me is a methyl group, wherein D in Chemical Formula 1 polyethylene glycol represented by Chemical Formula 18 below:
• in Chemical Formula 18, n is an integer from 1 to 50,
• wherein the preparing of the catalyst-supporting particle comprises:
• preparing a mixture by dissolving the alkoxy silane-functionalized polyurethane precursor and the tetraethyl orthosilicate in a solvent;
• and
• preparing the catalyst-supporting particle by adding dropwise an aqueous acid solution into the mixture and allowing reaction to take place,
• wherein the preparing of the mixture comprises mixing the alkoxy silane-functionalized polyurethane precursor with the tetraethyl orthosilicate in a weight ratio of 1:5 to 1:8.