Abstract: Coating compositions comprising: A) least one hydroxy-functional polyester with at least two hydroxyl groups per molecule, wherein at least one of which hydroxyl groups is a tertiary hydroxyl group, and the polyester has a number average molecular weight Mw of 200 to 5000, and contains as a structural element 10-90 wt-%, relative to the total quantity of polyester, of at least one acid ester group comprising a tertiary hydroxyl group and of the following general formula I ?wherein R1 is a single bond or a C1-C6 alkyl group, R2 and R3 mutually independently mean a C1-C4 alkyl group, B) optionally, at least one additional hydroxy-functional binder other than A) and C) at least one cross-linking agent which is capable of entering into a cross-linking reaction with the OH-groups of components A) and B.

Abstract: The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior art processes including improved heat transfer, volume control, agitation and disengagement functions. The pipe reactor processes and apparatus of the present invention are built and operated at a much lower cost than conventional polyester processes.

Abstract: A brominated unsaturated polyester resin containing a hydroxyl value of about 35 or less and a hydroxyl acid molar ratio of about 2:1 to about 1:4. The brominated unsaturated polyester resin is prepared from a polyfunctional carboxylic acid, a monocarboxylic acid, and a polyfunctional glycol or alcohol that contains bromine under polyester esterification reaction conditions. The brominated unsaturated polyester resin can be incorporated into a resin composition that also contains vinyl monomer. The invention is also directed to a method of making a brominated unsaturated polyester resin, and to castings, coatings, and laminate panels containing cured brominated unsaturated polyester resin compositions of the invention.

Abstract: Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a composition comprising a hydroxyalkyl-terminated polyester oligomer. The hydroxyalkyl-terminated polyester oligomer is heated to produce a composition comprising an intermediate molecular weight polyester which preferably has a molecular weight between about 20,000 Daltons and about 70,000 Daltons. The intermediate molecular weight polyester is heated and a solvent is added prior to or during the heating process to produce a composition comprising a macrocyclic oligoester. An optional step is to separate the macrocyclic oligoester from the composition comprising the macrocyclic oligoester.

Abstract: Disclosed is a copolyester resin composed mainly of terephthalic acid, ethyleneglycol, 1,4-cyclohexanedimethanol, polyethyleneglycol bisphenol-A and a multifunctional monomer. According to the current invention, the multifunctional monomer and polyethyleneglycol bisphenol-A are additionally copolymerized along with 1,4-cyclohexanedimethanol, whereby the resultant copolyester resin can have low haze and high melt viscosity and melt strength, with superior moldability due to low melt pressure. In addition, extrusion blow molded articles and profile extruded articles, such as bottles and tubes, are provided by use of the copolyester resin having superior properties.

Abstract: Disclosed in this invention is a heat-shrinkable polyester film comprising a polyester film support and a coat layer formed on one or both sides of the polyester film support, said coat layer comprising a quaternary ammonium sulfate and a polysiloxane resin.

Abstract: Disclosed are fibers and films prepared from polyesters of a dicarboxylic acid, preferably terephthalic acid, and a diol selected from 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, or 1,3-propanediol. The fibers and films contain a multifunctional epoxide additive and, optionally, an antioxidant, and show an increased dry heat stability when exposed to elevated temperatures in the presence of air while preserving excellent hydrolytic stability. Also disclosed is a process for stabilizing polyester fibers by melt blending a polyester and epoxide additive and melt spinning. The fibers and films are particularly useful in applications requiring elevated temperatures.

Abstract: Disclosed is an unsaturated polyester resin composition comprising an unsaturated polyester (A) and a polymerizable unsaturated monomer (B), wherein the “shrinkage stress upon cooling” of a cured article thereof is 17 MPa or less and the ratio of the “shrinkage stress upon cooling/elastic limit” is 1 or less. The cured article has excellent gloss retention and yellowing resistance.

Abstract: Process for the preparation of heat-stable, antimony-free polyesters of neutral color and the products which can be prepared by this process A process for the preparation of heat-stable, antimony-free polyesters of neutral color by esterification of aromatic dicarboxylic acids or transesterification of lower aliphatic esters of aromatic dicarboxylic acids with aliphatic diols and subsequent polycondensation in which a possible transesterification is carried out in the presence of 20 to 120 ppm, based on the catalyst metal, of a transesterification catalyst, after the esterification or transesterification has ended, phosphoric acid, phosphorous acid and/or phosphonic acids or a derivative thereof are added to the esterification or transesterification batch as a completing agent in an amount which is 100% of the amount equivalent to the transesterification catalyst employed and up to 99% of the amount equivalent to the cobalt to be employed, up to 80 ppm of cobalt in the form of a cobalt compound are then adde

Abstract: Polyester films which comprise a stabilizer for inhibiting oxidative degradation, at least some of which has been covalently incorporated into the polymer chain of the polyester through polycondensation during formation of the polyester, have not only high resistance to oxidation but also very few surface defects and high stability during processing, and are suitable not only for use as a packaging material but for a wide variety of other technical applications.

Abstract: Disclosed is a process of hydrogenating a polyester oligomer containing terephthalic acid residues wherein terephthalic acid residues are converted to residues of 1,4-cyclohexanedicarboxylic acid. Also disclosed is a process for the preparation of polyesters containing 1,4-cyclohexanedicarboxylic acid residues by first hydrogenating a polyester oligomer containing terephthalic acid residues and then reacting the resulting oligomer with one or more polyester-forming reactants to produce a higher molecular weight polyester.

Abstract: A material for a liquid-crystal alignment film which comprises as a first polyamide a C3 to C10 alkyl ester of a polyamic acid whose acid anhydride residual group is any of: and as a second polyamide a C3 to C10 alkyl ester of a polyamic acid whose acid anhydride residual group is: is provided. The use of this material materializes a liquid-crystal alignment film having a high pre-tilt angle of molecules to the substrate, and having superiority in respect of electrical properties such as voltage holding ratio and residual DC voltage, adherence to substrates, printability, and step-covering properties.

Abstract: A copolyester having an inherent viscosity of equal to or greater than about 0.3 formed from about 20 to about 60 mole percent based on the amount of aromatic dicarboxylic acid of one or more of isophthalic dicarboxylic acid or an alkyl diester thereof, about 40 to about 80 mole percent based on the amount of aromatic dicarboxylic acid of one or more of terephthalic acid or 2,6-naphthalene dicarboxylic acid or an alkyl diester thereof, about 10 to about 60 mole based on the total amount of dicarboxylic acids of one or more aliphatic dicarboxylic acids or an alkyl diester, about 0.1 to about 5 mole percent based on the moles of total dicarboxylic acid of one or more alkali or alkaline earth metal salts of 5-sulfoisophthalic dicarboxylic acid or an alkyl diester thereof, about 90 to 100 mole percent based on the total amount of glycols of one or more aliphatic glycols, and 0 to about 10 mole percent based on the total amount of glycols of one or more of di(ethylene glycol) and tri(ethylene glycol).

Abstract: A polyester of general formula 1 RO&Brketopenst;(A)(B)&Brketclosest;nCox  1 and its use as Association Thickener in aqueous media such as paints and inks; wherein R is hydrogen or a polymerization terminating group; A is a residue of a poly-C2-6-alkyleneglycol containing not less than 80% by weight polyethyleneglycol such as polyethyleneglycol with number average MW from 200 to 35,000; B is the residue of C4-50-alk(en)yl succinic acid such as C14-alkylsuccinic acid; X is hydroxy, a group ROA—, a group —OR1, —NHR1 or —O− M+, R1 is C1-18-alk(en)yl; M+ is a metal cation, and n is from 2 to 100.

Abstract: A PCT copolyester composition having at least about 70 mole % terephthalic acid and at least about 70 mole % 1,4-cyclohexanedimethanol and an inherent viscosity of greater than about 0.9 dL/g is prepared by solid state polymerizing a copolyester composition having a starting inherent viscosity of from about 0.4 to about 0.8 dL/g for a period of from about 1 minute to 100 hours and at a temperature of from about 140° C. to about 2° C. below the melting point of the copolyester to produce a copolyester having an inherent viscosity of greater than about 0.9 dL/g. Another aspect of the present invention is an extrusion blow molded article made from the copolyester prepared by the solid state polymerization process.

Abstract: Polyester fibers comprising a copolyester which simultaneously satisfies the following respective requirements (a) to (c), (a) a terephthalic acid component in an amount of 0 to 100 mol % and a 2,6-naphthalenedicarboxylic acid component in an amount of 100 to 0 mol % respectively based on the whole dicarbxylic acid component, wherein the total amount, of the terephthalic acid component and the 2,6-naphthalenedicarboxylic acid component, accounts for 90 mol % or more based on the whole dicarboxylic acid component, (b) a trimethylene glycol component accounts for 0 to 100 mol % and a 1,4-cyclohexanedimethanol component accounts for 100 to 0 mol % respectively based on the whole glycol component, wherein the total amount, of the trimethylene glycol component and the 1,4-cyclohexanedimethanol component, accounts for 90 mol % or more based on the whole glycol component and (c) the sum total value of mol % of the 2,6-naphthalenedicarboxylic acid component and mol % of the 1,4-cyclohexanedimethanol component is 2

Abstract: An alicyclic (meth)allyl ester monomer obtained by a specific production process. An alicyclic (meth)allyl ester compound for plastic lenses, which can be obtained by a simple and easy production process and which can endure a long-term storage, is produced using the monomer, and a plastic lens is obtained using the compound.

Abstract: This invention relates to a process for producing a polyester comprising the steps of:

Abstract: A material for a liquid-crystal alignment film which comprises as a first polyamide a C3 to C10 alkyl ester of a polyamic acid whose acid anhydride residual group is any of: and as a second polyamide a C3 to C10 alkyl ester of a polyamic acid whose acid anhydride residual group is: is provided. The use of this material materializes a liquid-crystal alignment film having a high pre-tilt angle of molecules to the substrate, and having superiority in respect of electrical properties such as voltage holding ratio and residual DC voltage, adherence to substrates, printability, and step-covering properties.

Abstract: The present invention is directed to carboxyl-containing monomers for use in preparing a polyurethane polymers, the carboxyl-containing monomers being the reaction product of a low molecular weight polyol compound and an acid anhydride in the presence of 5-500 ppm phosphoric acid, the carboxyl-containing monomer having a viscosity in the range of 3,000 to 100,000 centipoise, and having oligomer content of less than about 30 mg KOH/g. The present invention is also directed to methods of making the above carboxyl-containing monomers, as well as prepolymers and urethane polymers containing the above carboxyl-containing monomers.

Abstract: Thermoplastic compositions of polyester/polycarbonate blends have reduced yellowness and improved thermal and melt stability when the polyester is produced with a reduced level of a titanium-containing catalyst in an amount of from about 1 to about 30 ppm elemental titanium, with ppm based on the total weight of the polyester.

Abstract: There are provided novel multilayer films comprising a layer comprising a thermoplastic polymer, such as an aliphatic-aromatic copolyester (AAPE), with or without filler, and a layer comprising a filled thermoplastic polymer. The polymers in the layers may be the same or different. The multilayer films are preferably characterized by having increased moisture vapor transmission rate (MVTR). Also provided are novel articles of manufacture comprising the novel multilayer films.

Abstract: This invention concerns a method for increasing the polymerization rate of polyester polymers in the solid state by adding a catalytic amount of zinc p-toluenesulfonate to a polyester polymer melt that is essentially free of antimony and germanium, before solid state polymerization.

Abstract: Liquid composition polymerizable, by means of radicalic polymerization, into organic glass, comprising the product obtained from the transesterification of a mixture of diallyl carbonate (A) and a phthalic ester (B), with one or more polyols (C), linear or branced, containing from two to eight carbon atoms in the molecule.

Abstract: A process for the formation of a purified anhydrosugar alcohol is disclosed, whereby the resultant purified anhydrosugar alcohol has a purity of at least 99.8% and is substantially colorless. The anhydrosugar alcohol is purified by distillation, recrystallization from methanol, ethanol or ethylene glycol, melt recrystallization, or a combination thereof. Preferably, the purification is by distillation followed by recrystallization from methanol, ethanol or ethylene glycol. A test for determining the purity of the anhydrosugar alcohol is disclosed, wherein the color of the anhydrosugar alcohol after annealing at a temperature of at least 260° C. for at least four hours is examined. Alternatively, purity can be determined by examination of ultraviolet (UV) transmittance of the purified anhydrosugar alcohol at various wavelengths.

Abstract: The invention concerns powder thermosetting coating compositions comprising (a) an amorphous polyester containing carboxyl groups, rich in isophthalic acid and neopentylglycol, optionally branched with a polycarboxylic acid or a polyol containing at least three functional groups; (b) a semicrystalline polyester containing carboxyl groups prepared from one or several saturated aliphatic dicarboxylic acids with linear chain, and from a saturated aliphatic diol with linear or cyclic chain optionally branched with a polycarboxylic acid or with a polyol containing at least three functional groups, and having a melting point (Tm) of at least 40° C. and an acid value of 5 to 50 mg of KOH/g, and (c) a cross-linking agent. Said compositions are useful for preparing powder paints and varnishes providing excellent quality coatings whereof the brilliance, measured at an angle of 60°, according to the ASTM D 523 standard is always less than 50%, that is half-gloss or matt coatings.

Abstract: The present invention can provide a lactone polyester diol at least containing &egr;-caprolactone and a dibasic acid as constructing component units, and a polyurethane obtained using the diol and an organic diisocyanate can provide a spandex filament which is more excellent in a recovering ability of elasticity, strength, hydrolysis resistance, and heat resistance.

Abstract: In the production method of the present invention, a copolyester of intended sublimable diol proportion is produced by the reaction of a dicarboxylic acid and/or an ester-forming derivative thereof with a sublimable diol and a non-sublimable diol with an increased conversion of the sublimable diol. Since the escape of the sublimable diol is effectively prevented, the process solves the problem of clogging pressure-reduced pipes, etc. of an apparatus for polyester resin production.

Abstract: A multilayered polymer film includes a first set of optical layers and a second set of optical layers. The first set of optical layers is made from a polyester which is often birefringent. The polyesters of the first set of optical layers typically have a composition in which 70-100 mol % of the carboxylate subunits are first carboxylate subunits and 0-30 mol % are comonomer carboxylate subunits and 70 to 100 mol % of the glycol subunits are first glycol subunits and 0 to 30 mol % of the glycol subunits are comonomer glycol subunits, where at least 0.5 mol % of the combined carboxylate and glycol subunits are comonomer carboxylate or comonomer glycol subunits. The multilayered polymer film may be used to form, for example, a reflective polarizer or a mirror.

Abstract: The invention relates to flame-retardant, unsaturated polyester resins made from unsaturated and saturated dicarboxylic acids and/or their anhydrides, from polyhydric alcohols, from one or more monomers and from a reactive phosphorus compound, which contain structural units of the formula IV where R1 is straight-chain or branched alkyl, cycloalkyl, aryl or alkylaryl groups having from 1 to 18 carbon atoms and R2 is methyl or hydrogen. The invention likewise relates to a process for preparing such polyester resins and to their use.

Abstract: A water slurry process is used to prepare a prepreg and to manufacture articles from macrocyclic polyester oligomers. In one embodiment, a process for preparing a water suspension of macrocyclic polyester oligomers includes the steps of contacting a macrocyclic polyester oligomer and a polymerization catalyst with water and a surfactant, and mixing the macrocyclic polyester oligomer and polymerization catalyst with water and the surfactant thereby forming a suspension. In another embodiment, a process for impregnating macrocyclic polyester oligomers for polymerization includes the steps of providing a suspension of a macrocyclic polyester oligomer and a polymerization catalyst in water, applying the suspension to a base material, drying to remove water from the suspension, and pressing the dried suspension to a desired form. In yet another embodiment, a composition of macrocyclic polyester oligomer includes a macrocyclic polyester oligomer, a polymerization catalyst, and water.

Abstract: Disclosed is a flame retardant polybutyleneterephthalate resin prepared be copolymerizing a phosphorus-based flame retardant represented by the following formula I and a butyleneterephthalate unit: wherein R1 and R2 are different or the same and are methyl or butyl including a hydroxyl group.

Abstract: This invention provides a new, biomass-derived glycol, bis(2-hydroxyethyl)isosorbide, which is found to be a valuable monomer for a wide variety of polymeric materials.

Abstract: A polyether ester elastomer comprising about 90-about 60 weight % polytrimethylene ether ester soft segment and about 10-about 40 weight % trimethylene ester hard segment, and use thereof in fibers and other shaped articles. The fibers have excellent physical properties, including superior strength and stretch recovery.

Abstract: A plastic lens material comprising a compound in which a part or all of 1,4-cyclohexane dicarboxylate structural units are a cis structure; a production process of the material; a plastic lens composition containing the material; a plastic lens obtained by curing the composition; and a production process of the plastic lens. A plastic lens material free of changing into a white and turbid material during storage for a long period of time is provided.

Abstract: A polyester polymer includes at least one hydroxyl terminated polyoxetane block containing repeat units derived from polymerizing at least one oxetane monomer having a pendant —CH2—O—(CH2)n—Rf group wherein said Rf group is partially or fully fluorinated. A preferred process for forming said polymer is by reacting a hydroxyl terminated polyoxetane with a polycarboxylic acid under appropriate conditions to form an ester linkage and then adding and reacting that product with polyester forming reactants. The polyester polymer containing at least one polyoxetane block therein when reacted with an amino resin curative can be used as a coating on a substrate wherein the coating has dry erase properties. The coated substrate can be used as prepared or applied to yet other substrates.

Abstract: A method of producing sulfonated polyester compounds suitable for use as a soil releasing agent and/or textile sizing agent in which a sulfonated acid or ester is reacted with a hydroxy-containing compound to form a sulfonated hydroxy terminated ester which then undergoes a transesterification reaction with a poly(ethylene) terephthalate based polyester followed by polycondensation to form the desired sulfonated polyester compound.

Abstract: A polyether ester elastomer comprising about 90-about 60 weight % polytrimethylene ether ester soft segment and about 10-about 40 weight % tetramethylene ester hard segment, and use thereof in fibers and other shaped articles. The fibers have excellent physical properties, including superior strength and stretch recovery.

Abstract: Disclosed is a method for preparing polyester resins copolymerized with glycol for modification such as 1,4-cyclohexanedimethanol, in which the content of said glycol ingredient for modification ranges from 20 to 80 mol % of the total glycol content. Dicarboxylic acid such as terephthalic acid is esterified with ethylene glycol and said glycol for modification. The esterification product is subjected to polycondensation in the presence of a titanium dioxide/silicon dioxide coprecipitate catalyst, said catalyst being in the form of 4% or less strength by weight suspension in glycol. The copolyester prepared as above shows excellent transparency and color properties in addition to being produced at high efficiency.

Abstract: A polyester resin composition is calendered to produce a film or a sheet. The polyester resin composition is a polyester having a crystallization half time from a molten state of at least 5 minutes combined with an additive for preventing sticking of the polyester to calendering rolls.

Abstract: A calendered film or sheet of a polyester resin composition has a haze value of less than 5 percent. The polyester resin composition comprises a polyester having a crystallization half-time from a molten state of at least 5 minutes and an additive comprising (i) a fatty acid or a salt of a fatty acid containing more than 18 carbon atoms and (ii) an ester wax comprising a fatty acid containing more than 18 carbon atoms with an alcohol containing from 2 to 28 carbon atoms, wherein the ratio of the fatty acid or salt of the fatty acid to the ester wax is 1:1 or greater. Also, the present invention is a process for producing such calendered film or sheet having a haze value of less than 5 percent.

Abstract: An alicyclic (meth)allyl ester monomer obtained by a specific production process. An alicyclic (meth)allyl ester compound for plastic lenses, which can be obtained by a simple and easy production process and which can endure a long-term storages, is produced using the monomer, and a plastic lens is obtained using the compound.

Abstract: The present invention improves the effectiveness of the oxygen scavenging composition and maintains an excellent balance in the color properties of the polymer. The present invention relates to an improved oxygen scavenging PET based copolymer comprising from about 10 to about 120 ppm cobalt based on the PET polymer, and from about 15 to about 150 ppm zinc based on the PET polymer. The present invention also comprises a process for preparing a PET based oxygen scavenging copolymer, comprising the steps of: a) polymerizing a PET based polymer; b) adding Zn, Co, and an oxygen scavenging compound during said polymerizing step; c) copolymerizing said oxygen scavenging compound with said PET based polymer to form a copolymer; and d) extruding said copolymer.

Abstract: Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a composition comprising a hydroxyalkyl-tenninated polyester oligomer. The hydroxyalkyl-terminated polyester oligomer is heated to produce a composition comprising an intermediate molecular weight polyester which preferably has a molecular weight between about 20,000 Daltons and about 70,000 Daltons. The intermediate molecular weight polyester is heated and a solvent is added prior to or during the heating process to produce a composition comprising a macrocyclic oligoester. An optional step is to separate the macrocyclic oligoester from the composition comprising the macrocyclic oligoester.

Abstract: The invention relates to fibers, particularly binder fibers, made from polyesters and the polyesters themselves. The polyesters are the product of a reaction between a glycol component and a dicarboxylic acid component where the glycol component contains at least 50 mole % of a four carbon diol, such as 1,4-butanediol, or a six carbon diol, such as 1,6-hexanediol or a mixture of a four carbon and six carbon diol. Typically, the polyesters of the invention are semicrystalline and/or crystalline and have a specific melting point ranging from about 140 to about 185° C. The polyesters of the invention may be formed into a variety of products, especially binder fibers for nonwoven fabrics, textile/industrial yarns and fabrics, composites and other molded articles.

Abstract: A calendered film or sheet of a polyester resin composition has a haze value of less than 5 percent. The polyester resin composition comprises a polyester having a crystallization half-time from a molten state of at least 5 minutes and an additive comprising (i) a fatty acid or a salt of a fatty acid containing more than 18 carbon atoms and (ii) an ester wax comprising a fatty acid containing more than 18 carbon atoms with an alcohol containing from 2 to 28 carbon atoms, wherein the ratio of the fatty acid or salt of the fatty acid to the ester wax is 1:1 or greater. Also, the present invention is a process for producing such calendered film or sheet having a haze value of less than 5 percent.

Abstract: The invention relates unsaturated polyester resins for the manufacture of subzero flexible, weather-resistant products. The liquid unsaturated polyester resin comprises a linear unsaturated polyester obtained by reacting 5-30 mol % of one or more ethylenically unsaturated dicarboxylic acids (A), 20-45 mol % of one or more other aliphatic or aromatic acids (B) and 40-60 mol % of two or more polyhydric alcohols and 30-60 wt % of one or more reactive monomers. The linear unsaturated polyesters have a cone and plate viscosity (I.C.I.) of 2 ps/125° C.-20 ps/125° C. and a molecular weight Mw of 20,000-100,000. The invention also relates to a process for the manufacture of such unsaturated polyester resins and to the use of them in applications wherein good adhesion to supporting material and flexibility at ambient and especially at low temperatures are needed.

Abstract: A monofilament comprising a branched poly(ethylene terephthalate) having an inherent viscosity of at least 0.50 dL/g. Also provided is a process for forming a monofilament that comprises forming a branched poly(ethylene terephthalate) having an inherent viscosity of at least 0.50 dL/g and shaping the branched poly(ethylene terephthalate) to form the monofilament.

Abstract: The invention provides a method for producing a thermotropic liquid crystalline polymer of high quality at high yield and in short polymerization time, which method includes polymerizing staring monomers I, II, III, and IV, i.e., (I) an aromatic hydroxycarboxylic acid, etc.; (II) an aromatic dicarboxylic acid and an alicyclic dicarboxylic acid; (III) an aromatic diol, an alicyclic diol, an aliphatic diol, etc.; and (IV) an aromatic hydroxylamine, an aromatic diamine, etc. in the presence of an acylating agent, wherein the starting materials are charged so as to satisfy the following equations (1) to (4): 0.0015≦((A)−(B))/((A)+(B))≦0.006  (1); 1.01≦(D)/(C)≦1.08  (2); 0≦(E)≦40  (3); and (D)/(C)≧−0.002 ×(E)+1.

Abstract: A polyester is a polycondensation product of (i) a diol component and (ii) a dicarboxylic acid component. In this polyester, the diol component (i) includes a tricyclo[3.3.1.13,7]decanediol of following Formula (1): wherein n is 0 or a positive integer, and carbon atoms constituting a ring may each have a substituent, or the dicarboxylic acid component (ii) includes a tricyclo[3.3.1.13,7]decanedicarboxylic acid of following Formula (2): wherein m is 0 or a positive integer, and carbon atoms constituting a ring may each have a substituent. The polyester has high heat resistance, low water absorbency, excellent optical characteristics and satisfactory moldability.