Patent ID: 7182086

Claim:
A mouth guard comprising 85% by weight or more of at least one block copolymer selected from the group consisting of: a block copolymer (a-1) comprising one or more polymer blocks A made of a vinyl aromatic compound, and one or more polyisoprene blocks B having a content of 1,2-bonds and 3,4-bonds of 40% by mol or more, wherein a content of vinyl aromatic compound units is from 10 to 40% by weight, and a hydrogenated product thereof (b-i); a block copolymer (a-2) comprising one or more polymer blocks A made of a vinyl aromatic compound, and one or more 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 more, wherein a content of vinyl aromatic compound units is from 10 to 40% by weight, and a hydrogenated product thereof (b-2); and a block copolymer (a-3) comprising one or more polymer blocks A made of a vinyl aromatic compound, and one or more polybutadiene blocks D having a content of 1,2-bonds of 60% by mol or more, wherein a content of vinyl aromatic compound units is from 10 to 40% by weight, and a hydrogenated product thereof (b-3).