Resin and surface protective plate or automotive material

A resin comprising both a structural unit from a monomer having a carbon-carbon double bond at a terminal thereof and a structural unit from a polyrotaxane compound, the resin being a polymerized compound of the monomer having a carbon-carbon double bond at a terminal thereof and the polyrotaxane compound, wherein

• the structural unit from the monomer having a carbon-carbon double bond at a terminal thereof is a structural unit from methyl acrylate, ethyl acrylate, butyl acrylate, lauryl acrylate, benzyl acrylate, cyclohexyl acrylate, methyl methacrylate, ethyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, benzyl methacrylate, cyclohexyl methacrylate, a vinyl cyanide compound, an ethylenically unsaturated carboxylic acid hydroxyalkyl ester, an ethylenically unsaturated sulfonic acid ester, acrylic acid, methacrylic acid, an ethylenically unsaturated amine compound, an ethylenically unsaturated silane compound, or a vinyl halide;
• and
• the polyrotaxane compound is a compound in which, when the total number of hydrogen atoms in hydroxyl groups contained in polyrotaxane is defined as 100%, greater than or equal to 4% and less than or equal to 10% of the hydrogen atoms in the hydroxyl groups are substituted with a (meth)acryloyl group or a group containing a (meth)acryloyl group,
• the polyrotaxane comprising:
• optionally substituted cyclodextrin;
• a linear molecule clathrated in the optionally substituted cyclodextrin in a skewer shape;
• and
• a capping group for preventing the optionally substituted cyclodextrin from leaving, the capping group being located at a terminal of the linear molecule clathrated in the optionally substituted cyclodextrin in a skewer shape, and
• the weight average molecular weight of the linear molecule clathrated in the optionally substituted cyclodextrin in a skewer shape is greater than or equal to 21000 and less than or equal to 500000.