A thermoplastic resin composition for an optical material is provided. The thermoplastic resin composition contains a compounding agent represented by general formula (1). (In general formula (1), R.sub.1 to R.sub.5 independently represent a hydrogen atom, or an alkyl group having 1 to 20 carbon atoms in total which may have a substituent; R.sub.6 to R.sub.9 independently represent a hydrogen atom, or an alkyl group having 1 to 20 carbon atoms in total which may have a substituent; and R.sub.10 represents a hydrogen atom, or an alkyl group having 1 to carbon atoms in total.)

The present application relates to a resin including a unit represented by Chemical Formula 1, a method for preparing the same, a resin composition including the same, and a molded article including the resin composition.

Provided is a compound represented by General Formula (1) ##STR00001## in General Formula (1), Ar.sub.1 and Ar.sub.2 independently represent a group selected from the following Formulae, ##STR00002##

Provided is a compound represented by General Formula (1)

##STR00001##

in General Formula (1), Ar.sub.1 and Ar.sub.2 independently represent a group selected from the following Formulae,

##STR00002##

##STR00003##

##STR00004##

##STR00005##

##STR00006##

##STR00007##

##STR00008##

##STR00009##

##STR00010##

##STR00011##

##STR00012##

##STR00013##

##STR00014##

##STR00015##

The present disclosure relates to polycarbonate a diol compound represented by Chemical Formula 1; at least one compound of compounds represented by Chemical Formulae 2 and 3; and a carbonate precursor-derived repeating unit, and a method for preparing the same.

A polyester carbonate resin is provided, which includes a structural unit derived from a compound represented by general formula (1), a structural unit derived from a compound represented by general formula (2), a structural unit derived from a dicarboxylic acid or a derivative thereof, and a structural unit derived from a carbonic acid diester. The polyester carbonate can be used, e.g., in optical systems.

##STR00001##

A filament for use in forming a support structure in fused filament fabrication, the filament comprising an amorphous, thermoplastic resin further comprising Bisphenol Isophorone carbonate units and Bisphenol A carbonate units, wherein the Bisphenol Isophorone carbonate units are 30 to 50 mole percent of the total of Bisphenol A carbonate units and Bisphenol Isophorone carbonate units in the resin, and wherein the resin has a glass transition temperature from 165° C. to 200° C. The composition used to form the support filament exhibits a desirable combination of filament formability, printability, lack of significant oozing from the printer nozzle, and good ease of mechanical separation from the build material at room temperature after printing.

A polycarbonate polyester includes residues of following formula (1), formula (2) and formula (3):

##STR00001## in which R.sub.1 is C.sub.2-C.sub.15 hydrocarbon group; R.sub.2 is C.sub.4-C.sub.16 hydrocarbon group; a molar ratio of the residue of the formula (2) to the residue of the formula (1) is in a range of greater than 0.05 to less than 0.8; * represents a linking bond.

Provided are a polycarbonate having an appropriate refractive index and an appropriate Abbe number, and comprehensively excelling in heat resistance, total light transmittance, and hue, and a molded article thereof. The polycarbonate includes a constituent unit represented by Formula [I] and a constituent unit having a hydrocarbon group containing a cyclic structure. In Formula [I], R.sup.1 and R.sup.2 each independently denote a hydrocarbon group, and each R.sup.3 independently denotes a hydrogen atom, a heteroatom-containing group, a halogen atom-containing group, a linear alkyl group having from 1 to 6 carbon atoms, a branched alkyl group having from 3 to 6 carbon atoms, or a group including an aryl group and having from 6 to 12 carbon atoms. ##STR00001##

The invention relates to a self-healing copolymerized polycarbonate and a preparation method thereof. The method comprises the following steps: mixing a reducing sugar, an oxetane derivative and a first catalyst, heating and reacting at 50 to 80° C. for 0.5 to 2 h to obtain the first product; adding a diol, a diester and a second catalyst to the first product, and then heating to 180 to 220° C. for 2 to 4 h to obtain an oligomer; heating the oligomer to 230 to 270° C. and holding at the temperature and reacting for 1 to 3 h to obtain a self-healing copolymerized polycarbonate. The self-healing copolymerized polycarbonate material prepared by the method of the invention has self-healing property and biodegradability, which ensures the consistency and uniformity of the product. In addition, the block introduced into the main chain is green and environmentally friendly, and the original intention of clean production of polycarbonate has not been changed.