| abstract |
Provided are: an acrylic rubber having excellent storage stability; a production method therefor; a rubber composition including the acrylic rubber; and a crosslinked rubber object obtained by crosslinking the rubber composition. The acrylic rubber comprises 50-99.9 wt% combined units derived from at least one (meth)acrylic ester selected from the group consisting of alkyl (meth)acrylates and alkoxyalkyl (meth)acrylates, 0.1-20 wt% combined units derived from a monomer having a reactive group, and 0-30 wt% combined units derived from other monomer(s). The acrylic rubber contains a phenolic antioxidant represented by general formula (1) (R1 represents an isopropyl group or a t-butyl group and R2 represents an alkyl group having 1-12 carbon atoms) and has a weight-average molecular weight (Mw) in the range of 100,000-5,000,000. |