Polymethallyl alcohol resin composition and molding containing same

A resin composition consisting of:

• polymethallyl alcohol (A) consisting of a repeating structural unit represented by formula (1) in an amount of greater than or equal to 70 mol % to 100 mol %, and optionally another structural unit derived from (meth)acrylic acid ester, allyl alcohol, or styrene:
• and
• a component (B) that is at least one selected from the group consisting of acetic acid, butyric acid, propionic acid, citric acid, tartaric acid, lactic acid, phosphonic acid, and phosphoric acid,
• wherein a content of the component (B) is greater than or equal to 0.01 μmol and lower than or equal to 34.5 μmol per 1 g of the polymethallyl alcohol (A),
• the resin composition optionally includes a component (C) that is an alkali metal ion and/or an alkaline earth metal ion, wherein if the resin composition includes the component (C), then a content of the component (C) is 0.05 to 45 μmol per 1 g of the polymethallyl alcohol (A),
• the resin composition optionally includes at least one additive (D) selected from the group consisting of an ultraviolet absorber, a plasticizer, an antistatic agent, a non-metal-containing thermal stabilizer, a lubricant, a coloring agent, and a solvent, and
• wherein a ratio MFR15/MFR3 is from 0.3 to less than 1.7, wherein MFR3 is a weight of the resin composition discharged for 1 minute when the resin composition is held in a melt indexer at a temperature of 210° C. and a load of 2160 g for 3 minutes, and MFR15 is a weight of the resin composition discharged for 1 minute when the resin composition is held in the melt indexer at a temperature of 210° C. and a load of 2160 g for 15 minutes.