Abstract: An alighting assistance device D of the present disclosure may be a device moving a driver seat rearward in a case where a determination may be made that an occupant seated on the driver seat of a vehicle alights. The device may include a height changer which changes a height of a steering wheel, a sitting height acquirer which acquires a sitting height of the occupant, and a steering wheel controller 33 as one example of a height controller which controls the height changer such that the height of the steering wheel becomes lower as the sitting height acquired by the sitting height acquirer may be higher in the case where a determination is made that the occupant alights.

Abstract: At least one resin selected from the group consisting of aromatic polycarbonates and polyarylates has a bond between polymer chains formed by Diels-Alder reaction.

Abstract: A bischloroformate composition is represented by a formula (1) below, contains a plurality of Ar components, and has an average number of monomer units (m1), which is calculated by an expression (Numerical Expression 1) below, ranging from 1.0 to 1.99. The plurality of Ar components are each independently Ar1 or Ar2. The plurality of Ar components include at least one Ar1 and at least one Ar2. Ar1 is a group represented by a formula (2) below. Ar2 is a group represented by a formula (3) below. A molar composition ratio represented by Ar1/(Ar1+Ar2) ranges from 45 mol % to 99 mol %.

Abstract: A polycarbonate resin has a structure represented by a formula (1) and a yellow index (YI) of 30 or less in a solid form,

Abstract: A resin composition includes: a polycarbonate copolymer resin represented by a formula (1); and a polycarbonate resin having a repeating unit represented by a formula (2).

Abstract: A polycarbonate copolymer includes a repeating unit A represented by a formula (1) below, chain ends of the PC copolymer being terminated by a monovalent aromatic group or a monovalent fluorine-containing aliphatic group. In the above formula (1), R1 is a hydrogen atom or an alkyl group having 1 to 2 carbon atoms; an average repeating number n is in a range from 6 to 40 and L is an integer of 1 to 4; and when an aromatic ring is substituted by two or more of R1 (L?2), the two or more of R1 are the same or different from each other.

Abstract: A polycarbonate resin has a structure represented by a formula (1) and a yellow index (YI) of 30 or less in a solid form,

Abstract: A bischloroformate composition is represented by a formula (1) below, contains a plurality of Ar components, and has an average number of monomer units (m1), which is calculated by an expression (Numerical Expression 1) below, ranging from 1.0 to 1.99. The plurality of Ar components are each independently Ar1 or Ar2. The plurality of Ar components include at least one Ar1 and at least one Ar2. Ar1 is a group represented by a formula (2) below. Ar2 is a group represented by a formula (3) below. A molar composition ratio represented by Ar1/(Ar1+Ar2) ranges from 45 mol % to 99 mol %.

Abstract: A polycarbonate copolymer includes a repeating unit A represented by a formula (1) below, chain ends of the PC copolymer being terminated by a monovalent aromatic group or a monovalent fluorine-containing aliphatic group. In the above formula (1), R1 is a hydrogen atom or an alkyl group having 1 to 2 carbon atoms; an average repeating number n is in a range from 6 to 40 and L is an integer of 1 to 4; and when an aromatic ring is substituted by two or more of R1 (L?2), the two or more of R1 are the same or different from each other.

Abstract: A polycarbonate copolymer includes: a repeating unit represented by a formula (1) below; and a repeating unit represented by a formula (2) below, in which the repeating unit represented by the formula (1) is formed from a bischloroformate oligomer having an average number of monomer units n represented by a formula (100) below in a range from 0.1 to 1.3. In the formulae (100) and (1), Ar1 represents a group represented by a formula (3) below. In the formula (2), Ar2 represents a divalent aromatic group. In the formula (3) below, X1 represents a single bond or an oxygen atom. R11 each independently represents a methyl group or an ethyl group.

Abstract: A polycarbonate copolymer, a coating liquid and an electrophotographic photosensitive body are provided. The polycarbonate copolymer has good abrasion resistance and stable solubility in an organic solvent. The copolymer comprises a repeating unit A of formula (1); a repeating unit B of formula (2); and a repeating unit C of formula (3), in which: the polycarbonate copolymer has a presence ratio represented by Ar1/(Ar1+Ar2+Ar3) of from 50 to 65 mol %, a presence ratio represented by Ar2/(Ar1+Ar2+Ar3) of from 25 to 45 mol %, and a presence ratio represented by Ar3/(Ar1+Ar2+Ar3) of from 3 to 25 mol %: Ar1, Ar2, and Ar3 are each independently a divalent aromatic group, and X1 and X2 are each independently a single bond or —NH—, provided that Ar1 and Ar2 are not identical to each other. In the copolymer the repeating units B are not directly bonded to each other.

Abstract: A polycarbonate copolymer including a repeating unit represented by the following formula (1) and having a copolymerization molar ratio represented by Ar2/(Ar1+Ar2) of 30 mol % or more and 47 mol % or less. In the formula (1), Ar1 is a group represented by the following formula (2a) or (2b) and Ar2 is a group represented by the following formula (3); and n is an average number of repetition and is 1.12 or more and 2.34 or less.

Abstract: A polycarbonate copolymer includes a repeating unit A represented by a formula (1) below and a repeating unit B represented by a formula (2) below, in which an abundance ratio represented by Ar1/(Ar1+Ar2) is in a range of 35 mol % to 75 mol % and an abundance ratio represented by Ar2/(Ar1+Ar2) is in a range of 25 mol % to 65 mol %,

Abstract: A polycarbonate copolymer includes: a repeating unit represented by a formula (1) below; and a repeating unit represented by a formula (2) below, in which the repeating unit represented by the formula (1) is formed from a bischloroformate oligomer having an average number of monomer units n represented by a formula (100) below in a range from 0.1 to 1.3. In the formulae (100) and (1), Ar1 represents a group represented by a formula (3) below. In the formula (2), Ar2 represents a divalent aromatic group. In the formula (3) below, X1 represents a single bond or an oxygen atom. R11 each independently represents a methyl group or an ethyl group.

Abstract: This invention relates to a polycarbonate copolymer having a structure formed of a repeating unit represented by the following formula (100): in which a molar copolymer composition represented by Ar1/(Ar1+Ar2) is in a range of 50 mol % to 67 mol %, a reduced viscosity [?sp/C] is in a range of 0.60 dl/g to 4.0 dl/g, and a ratio of a hydroxyl group in all ends is 20 mol % or less.

Abstract: A polycarbonate copolymer includes a repeating unit A represented by a formula (1) below and a repeating unit B represented by a formula (2) below, in which an abundance ratio represented by Ar1/(Ar1+Ar2) is in a range of 35 mol % to 75 mol % and an abundance ratio represented by Ar2/(Ar1+Ar2) is in a range of 25 mol % to 65 mol %,

Abstract: A polycarbonate copolymer including a repeating unit represented by the following formula (1) and having a copolymerization molar ratio represented by Ar2/(Ar1+Ar2) of 30 mol % or more and 47 mol % or less. In the formula (1), Ar1 is a group represented by the following formula (2a) or (2b) and Ar2 is a group represented by the following formula (3); and n is an average number of repetition and is 1.12 or more and 2.34 or less.

Abstract: A molded article produced by molding a coating solution that contains a polycarbonate resin represented by the following formula (1) has excellent transparency, good water repellency and oil repellency, a lower friction coefficient and excellent surface lubricity, having a capability of improving abrasion resistance. In the formula (1), Rf represents a perfluoroalkyl group having 5 or more carbon atoms and 11 or more fluorine atoms or a perfluoroalkyl group having a specific structure; and W represents a divalent group including therein a specific structural unit.

Abstract: Provided are a polycarbonate copolymer, comprising: a repeating unit A represented by the following general formula (1); a repeating unit B represented by the following general formula (2); and a repeating unit C represented by the following general formula (3), in which: the polycarbonate copolymer has a presence ratio represented by Ar1/(Ar1+Ar2+Ar3) of from 50 to 65 mol %, a presence ratio represented by Ar2/(Ar1+Ar2+Ar3) of from 25 to 45 mol %, and a presence ratio represented by Ar3/(Ar1+Ar2+Ar3) of from 3 to 25 mol %; and the repeating units B are not directly bonded to each other, and a coating liquid and an electrophotographic photosensitive body each obtained by using the copolymer, and as a result, provided are a polycarbonate copolymer remarkably improved in abrasion resistance while maintaining its stable solubility in an organic solvent, and a coating liquid and an electrophotographic photosensitive body each obtained by using the copolymer: in the formulae, Ar1, Ar2, and Ar3 each independent