The invention relates to the field of
polyurethane curing agents and
polyurethane materials, in particular to a
polyurethane curing agent and application thereof in preparation of an
elastomer, and solves the problems that
peroxide free radicals are accumulated in the
polyurethane elastomer, so that the
polyurethane elastomer is aged,
colored groups are generated under the influence of
ultraviolet rays, the color of the
elastomer is deepened and discolored and the like. According to the specific scheme, the method comprises the following steps: reacting 2, 6-di-tert-butyl
phenol with
dimethyl sulfate to obtain 2, 6-di-tert-butyl
anisole; 2, 6-di-tert-butyl
anisole is subjected to a para-
acylation reaction, and a para-acyl compound is generated; carrying out
esterification reaction on the basic polyhydroxy curing agent and a para-acyl compound to generate an
antioxidant curing agent; the basic polyhydroxy curing agent is one of
triethanolamine,
trimethylolpropane or
pentaerythritol, the polyurethane prepared by the method is not influenced by the dispersing type
antioxidant, and the anti-aging capability and the physical and mechanical properties of the
elastomer are strong.