Abstract: It is an object of the present invention to provide a new alcohol compound, a polyester resin, an unsaturated polyester resin, a resin particle and an electrophotographic toner using the compound capable of using the renewable resources as a part of a raw material. An alcohol compound according to the present invention is characterized by representing the chemical formula [Chemical 1]. Furthermore, the polyester resin or the unsaturated polyester resin according to the present invention, is characterized in that the compound (wherein X is an aliphatic or an aromatic residue, Y is a refined rosin residue, a disproportionated rosin residue or a hydrogenated rosin residue, and n=0 to 1 in the formula.) is an essential component of an alcohol component. Further, the resin particle of the present invention is characterized by comprising the polyester resin.

Abstract: It is an object of the present invention to provide a new alcohol compound, a polyester resin, an unsaturated polyester resin, a resin particle and an electrophotographic toner using the compound capable of using the renewable resources as a part of a raw material. An alcohol compound according to the present invention is characterized by representing the chemical formula [Chemical 1]. Furthermore, the polyester resin or the unsaturated polyester resin according to the present invention, is characterized in that the compound (wherein X is an aliphatic or an aromatic residue, Y is a refined rosin residue, a disproportionated rosin residue or a hydrogenated rosin residue, and n=0 to 1 in the formula.) is an essential component of an alcohol component. Further, the resin particle of the present invention is characterized by comprising the polyester resin.

Abstract: The invention has for its object to provide a dental protector against bruxism adapted to protect the teeth from clenching, insure stability during wear, and applicable to many persons. The dental protector comprises a protective part (2) configured generally in the form of the letter U in conformity with the dental arc and adapted to cover the occlusal faces of the teeth and an engaging part (3) contiguous to the inner circumference of the protective part and adapted to cover the posterior surfaces of the teeth, the lower stratum (2y) of the protective part, which is to contact with the teeth, and the engaging part being formed from a thermoplastic resin having a softening temperature lower than the boiling temperature of water and the upper stratum (2x) of the protective part which is flat being formed from a material which does not soften at the above softening temperature.

Abstract: A molar protector comprising a pair of right and left molar protecting portions (1) each having faces complementary to the occlusal faces of the corresponding superior and inferior maxillary molars and a connecting portion (3) bridging said molar protecting portions (1), each of said molar protecting portions comprising a top layer, a bottom layer, and an intermediate layer lying between said top and bottom layers, said top layer and bottom layer being respectively made of an easily softenable material, the softening point of which is higher than human body temperature and lower than the boiling point of water, such as a thermoplastic resin, and said intermediate layer being made of an elastic, hardly softenable material which does not soften at temperatures below the boiling point of water, such as elastomer, silicone rubber, synthetic rubber, silicone resin, or high-temperature thermoplastic resin.