| CPC C08G 18/673 (2013.01) [C08G 18/10 (2013.01)] | 6 Claims |
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1. A method of preparing light-cured polyacrylate from an acrylate oligomer, wherein, the acrylate oligomer is obtained by a reaction of isocyanate group-terminated oligomer and formate-terminated ethylene glycol methacrylate:
 wherein R is methyl;
the isocyanate group-terminated oligomer is obtained by reacting an isocyanate-containing compound with an active hydrogen-containing compound, and the molar ratio of isocyanate to active hydrogen is greater than 1;
the active hydrogen-containing compound can be selected from one or more of polyols or polyamines;
the polyol is selected from one or more of polyester polyol, polyether polyol, polycarbonate polyol, polybutadiene polyol, polyolefin polyol or polyacrylate polyol; the polyamine is selected from one or more of polyetheramine, dichlorodiaminodiphenylmethane, and diethyltoluenediamine;
the isocyanate-containing compound is selected from one or more of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, and dicyclohexylmethane diisocyanate;
wherein, the method comprises the following steps:
1) mixing the acrylate oligomer with a reactive diluent and adding an initiator to obtain a mixture;
2) using a light source matching the initiator to cure the mixture in step 1) to obtain a light-cured sample; and
3) if the acrylate oligomer does not contain urea bonds, placing the light-cured sample obtained in step 2) at a temperature of 60-100° C. and a humidity of 60-90% for 1-48 hours; if the acrylate oligomer contains urea bonds, treating the light-cured sample obtained in step 2) at a temperature of 60-100° C. for 1-48 hours.
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