| abstract |
A mouth guard which is excellent in impact absorbability and durability, is thin and has good fittability, and is able to easily chew thereupon, and does not give vomiting feel; and a sheet for mouth guard which is suitable for producing the mouth guard. n The mouth guard or the sheet for mouth guard comprises at least one block copolymer selected from the group consisting of a block copolymer (a-1) comprising polymer blocks A made of a vinyl aromatic compound, and polyisoprene blocks B having a content of 1,2-bonds and 3,4-bonds of 40% by mol or less; a block copolymer (a-2) comprising polymer blocks A, and polymer blocks C which contain an isoprene unit and a butadiene unit in a ratio of from 5/95 to 95/5 (% by weight) and have a content of 1,2-bonds and 3,4-bonds of 40% by mol or less; and a block copolymer (a-3) comprising polymer blocks A, and polybutadiene blocks D having a content of 1,2-bonds of 60% by mol or more, wherein a content of vinyl aromatic compound units in each of the copolymers is from 10 to 40% by weight, and a hydrogenated product thereof (b-1) to (b-3). |