Abstract: A biodegradable hair ornament is made of a composite material comprising 50-90 wt % of polylactic acid, 5-40 wt % of a toughener, and 5-30 wt % of a nucleating agent. The toughener is selected from the group consisting of polyethylene terephthalate, thermoplastic elastomer ester resin, polyester polyol resin, vinyl ester resin, and combinations thereof. The nucleating agent is selected from the group consisting of calcium carbonate, talc, silicon dioxide, mica, and combinations thereof.

Abstract: Provided is a composite substrate for surface acoustic wave device which does not cause peeling of an entire surface of a piezoelectric single crystal film even when heating the film to 400° C. or higher in a step after bonding. The composite substrate is formed by providing a piezoelectric single crystal substrate and a support substrate, forming a film made of an inorganic material on at least one of the piezoelectric single crystal substrate and the support substrate, and joining the piezoelectric single crystal substrate with the support substrate so as to sandwich the film made of the inorganic material.

Abstract: A method of coating a carbon nanotube material with a solventless coating composition is described. The resulting coating has been shown to preserve the conductivity of the conductive layer and protect the conductive layer from the effects of subsequent coating compositions. Examples are shown in which the coating formulation comprises a polyol and an isocyanate. A layer material comprising a polyurethane coating on a carbon nanotube network layer is also described.

Abstract: An ignition coil includes a not-illustrated coil, a plate assembly, and a case assembly. The plate assembly and the case assembly are combined with each other by laser welding at a recess and a rib (projection) which are respective abutting portions, thereby forming storage spaces for storing the coil.

Abstract: A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein the manufacture comprises extrusion onto a fibrous substrate one or more polymer coating layers including at least one layer of a polymer blend consisting of (i) 20-95 wt-% of polylactide having a high melt index of more than 35 g/10 min (210° C.; 2.16 kg), (ii) 5-80 wt-% of polybutylene succinate (PBS) or a biodegradable derivate thereof, and (iii) 0-5 wt-% of one or more polymeric additives. The components of the blend are melted and blended in connection with the extrusion step. The goal is to improve extrudability, increase machine speed in extrusion and maintaining good adhesiveness to the substrate and good heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.

Abstract: Disclosed are methods of decreasing the concentration of a metal in a monomer composition including a bis(benzoyl)benzene, bis(benzoyl)benzene monomer compositions having a low total metal concentration, di-ketone polymers made from low metal bis(benzoyl)benzene monomers, and polymer compositions and shaped articles including the di-ketone polymers. It was surprisingly found that di-ketone polymers made by nucleophilic substitution of low metal bis(benzoyl)benzene monomers exhibit greater crystallinity, as compared with di-ketone polymers made with conventional monomers.

Abstract: Regarding a laser welded body in which a laser transmissive/absorptive molding member containing a PBT-based material and a laser absorptive molding member containing a PBT-based material are integrated with each other by laser welding, the following laser welded body is proposed as a laser welded body in which a bond strength can be further increased. A laser welded body having a structure in which a member I and a member II are integrally bonded to each other, the member I contains 0.0005 to 5.0 parts by mass, with respect to 100 parts by mass of a polyester-based resin A, of a laser transmissive/absorptive coloring material capable of transmitting and absorbing laser beam, and the polyester-based resin A contains at least a polybutylene terephthalate copolymer resin, the member II contains 0.15 to 10.

Abstract: A wound packing material, particularly suitable for use in negative pressure wound therapy, comprising a porous material admixed with a chemoattractant. This disclosure further provides methods of manufacturing the wound packing material, and therapeutic methods of using the wound packing material.

Abstract: The present invention is to provide a resin composition capable of producing a molded product sufficiently excellent in hydrolysis resistance and mold release characteristics and having an excellent balance between heat resistance and fluidity, even if a heat stabilizer and a mold release agent are contained. The present invention relates to a resin composition, comprising: (A) a polyarylate resin; (B) a melt-polymerized polycarbonate resin; (C) a specific phosphite compound; and (D) a dipentaerythritol fatty acid ester, a mass ratio (A/B) of the (A) polyarylate resin and the (B) melt-polymerized polycarbonate resin being from 2/98 to 98/2, and the resin composition having a Vicat softening point of 140° C. or higher.

Abstract: A solid-state polymerized poly(tetramethylene-2,5-furandicarboxylate) polymer is produced in a process including: providing a poly (tetramethylene-2,5-furandicarboxylate) polycondensate having a number average molecular weight (Mn) of at least 10,000, as determined by Gel Permeation Chromatography (GPC) using polystyrene as standard, and having a content of carboxylic acid end groups of at most 50 meq/kg; and keeping the poly(tetramethylene-2,5-furandicarboxylate) polycondensate at a temperature in the range of 80 to 140° C. to obtain a semi-crystalline polycondensate; and subjecting the semi-crystalline polycondensate to solid-state polymerization by keeping the semi-crystalline polycondensate at a temperature of at least 140° C. and below its melting point, whilst the semi-crystalline polycondensate is either under a flow of inert gas or under vacuum to obtain the solid-state polymerized poly(tetramethylene-2,5-furandicarboxylate) polymer.

Abstract: Method for obtaining biodegradable polymers that has a stage of esterification and/or transesterification and amidation reaction, a stage of prepolycondensation, a stage of polycondensation, a stage of extraction and a stage of drying, eliminating the use of chain extenders. The polymer can achieve all the range of viscosities desired and with an improved colour compared to the polymer from other methods, where chain extenders are used, provide a more efficient process, that is environmentally cleaner and safer for the operatives.

Abstract: A composition according to the present invention contains 100 parts by mass of a component (A) and 1-200 parts by mass of a component (B) and is solid at 25° C., the solid form being achieved at 25° C. without spray drying, impregnation into wax, or the like, and said composition is useful as an additive for a paint composition and an adhesive composition. The component (A) is an organic silicon compound represented by general formula (1), and the component (B) is at least one of organic silicon compounds represented by general formulas (2) and (3) (R1 and R2 represent, independently of each other, an alky group having 1-10 carbon atoms or the like, R3 and R4 represent, independently of each other, a divalent hydrocarbon group having 1-20 carbon atoms, m represents an integer from 1 to 3, R5 represents an alkyl group having 1-10 carbon atoms or the like, and R6 represents a divalent hydrocarbon group having 1-20 carbon atoms; however, an oxygen atom, a sulfur atom, etc.

Abstract: A polyaryletherketone resin material is provided for dental use having high color tone stability in the case of exposure to visible light. The polyaryletherketone resin material for dental use includes a polyaryletherketone resin, which is a thermoplastic resin containing at least an aromatic group, an ether group (ether bond), and a ketone group (ketone bond) in its structural unit, and having a b* value of 10.0 or more in terms of colorimetric value of a 1.0 mm molded body in a CIELab color system under a black background condition.

Abstract: Provided are an automobile interior/exterior material including a low-melting-point polyester resin fiber layer, and a method of manufacturing the same. More particularly, an automobile interior/exterior material having excellent processability and price competitiveness without deterioration of properties, such as strength and durability, is provided.

Abstract: A battery casing including a container configured to house an electrode assembly, wherein the container includes a bottom wall and a plurality of side walls, the bottom wall and the plurality of side walls are integrated to define an open side opposite to the bottom wall and to define a space for housing the electrode assembly, at least one of the bottom wall and plurality of the side walls includes a composite including a thermotropic liquid crystal polymer and a nanoclay dispersed in the thermotropic liquid crystal polymer, wherein the main chain of the thermotropic liquid crystal polymer includes an aromatic oxycarbonyl repeating unit and an alkylene moiety-containing repeating unit, and at least a portion of the nanoclay is present in an exfoliated state, and an X-ray diffraction pattern of the composite does not exhibit an intrinsic peak corresponding to the nanoclay.

Abstract: A polyester resin composition containing 100 parts by mass of a polyester resin and 0.01 to 10 parts by mass of a 2-amino-1,3,5-triazine derivative of Formula [1]: a polyester resin molded body obtained by the composition, and a crystal nucleating agent including the triazine derivative. A polyester resin composition containing a crystal nucleating agent that makes it possible to produce, with high productivity, a polyester resin molded product that promotes polyester resin crystallization and maintains high transparency after crystallization and is applicable for a wide variety of uses can be provided.

Abstract: Methods for producing 3D printing composite polymer materials for use in additive manufacturing processes are provided. The methods result in enhancing the material properties of the printing material by providing a uniform and smooth surface finish of the printing material and the nozzle extrudate for additive manufacturing processes, such as Fused Filament Fabrication. The method includes implementing impregnation techniques for combining carbon nanotubes or other nano-fillers, a polymer resin and a fiber material to produce a polymer material that can be processed into a printing material. Further, the method may include combining the carbon nanotubes or other nano-fillers and the polymer resin to form a masterbatch that may be further combined with the fiber material through an extrusion process. The method results in a printing material with enhanced material properties and smooth surface finish for the printing material and resulting nozzle extrudate for Fused Filament Fabrication.

Abstract: Provided are a polyester film that is usable for protecting a surface of a metal plate of a construction material, a decorative material, an interior material, an electronic product, etc., and a manufacturing method therefor, and a polyester mold product using the same and a manufacturing method therefor, wherein the polyester film has low orientation and low modulus to have excellent moldability.

Abstract: Bibenzoate copolyesters are based on (4,4?-biphenyl dicarboxylic acid-co-3,4?-biphenyl dicarboxylic acid) as the diacid component, and on an alicyclic diol compound such as 1,4-cyclohexanedimethanol as a portion of the diol component. Copolyesters are based on 4,4?-biphenyl dicarboxylic acid, and/or 3,4?-biphenyl dicarboxylic acid as the diacid component and may include a multifunctional acid. Copolymers may optionally base an essentially amorphous morphology, high glass transition temperature, high elongation at break, and/or high melting temperature.

Abstract: Disclosed is a biodegradable compositions containing at least a polyester containing 2,5-furandicarboxylic acid and at least a polymer selected from the group consisting of polyhydroxyalkanoates and/or aliphatic and/or aliphatic-aromatic diacid diol polyesters, which is particularly suitable for use in the manufacture of mass-produced articles. The articles exhibit excellent mechanical properties, associated with a high barrier property against oxygen and carbon dioxide.

Abstract: The present invention relates to a pigmented aqueous basecoat material including a polyether-based reaction product which is preparable by reaction of (a) at least one carboxy-functional component which is preparable by esterification reaction of at least one dihydroxycarboxylic acid (a1) with at least one dicarboxylic acid (a2) and/or the anhydride of a dicarboxylic acid (a2), the components (a1) and (a2) being used in a molar ratio of 0.5/3.0 to 1.7/1.8, with (b) at least one polyether of a general structural formula (I) in which R is a C3 to C6 alkylene radical and n is selected accordingly such that the polyether (b) possesses a number-average molecular weight of 500 to 5000 g/mol, the components (a) and (b) being used in the reaction in a molar ratio of 0.7/2.3 to 1.6/1.7, and the resulting reaction product possessing an acid number of 10 to 50 mg KOH/g.

Abstract: The present invention can provide a polyarylate obtained from a dihydric phenol component and an aromatic dicarboxylic acid component. The polyarylate is characterized in that the dihydric phenol component contains a compound represented by general formula (A) or (B) as a primary raw material, and the pencil hardness of the polyarylate is H or higher. (In the formula, R1 and R2 each independently denote a hydrogen atom, an alkyl group having 1-6 carbon atoms or a phenyl group. However, neither R1 nor R1 represents a methyl group.) (In the formula, R3 and R4 each independently denote a hydrogen atom or a methyl group. In addition, a is an integer between 4 and 11. However, a is not 5 if R3 and R4 are both hydrogen atoms.

Abstract: Crosslinkable compositions are provided that contain a) a polymeric material having at least two terminal dithiocarbamate groups or two terminal dithiocarbonate groups and b) a monomer composition that includes at least a crosslinking monomer having two or more ethylenically unsaturated groups. The polymeric materials in the crosslinkable compositions undergo chain extension and crosslinking reactions when exposed to actinic radiation in the ultraviolet region of the electromagnetic spectrum. Additionally, crosslinked compositions, articles that contain the crosslinkable compositions or the crosslinked compositions, and methods of making the articles are provided.

Abstract: The present invention aims to provide an inorganic substance-laminated sheet that can be used suitably for applications that require high gas barrier properties. The inorganic substance-laminated sheet includes a sheet having a dispersed structure with a structural period of 0.001 ?m to 100 ?m on at least one surface and an inorganic substance layer covering the surface having the dispersed structure.

Abstract: The invention relates to a method for the preparation of a polymerized CNSL composition, the method comprising subjecting a raw or technical CNSL to a heat treatment under reflux to obtain the polymerized CNSL composition, wherein the heat treatment is performed until the polymerized CNSL composition has a molecular weight Mw of about 2800 to about 3700, such as from about 2900 to about 3600, or from about 3000 to about 3500 g/mol. The invention further relates to a polymerized CNSL composition, use of a polymerized CNSL composition according to the invention in a bitumen composition, a modified bitumen composition according to the invention and an asphalt composition comprising a modified bitumen composition according to the present invention.

Abstract: The present invention relates to a non-toxic and biodegradable low dosage gas hydrate inhibitor comprising hyper-branched polyester polyols having hydroxyl end groups which are chemically modified. Further, the invention relates to a method for controlling gas hydrate formation and plugging of gas hydrate forming fluids and the use of the gas hydrate inhibitors for this purpose.

Abstract: A method of coating a carbon nanotube material with a solventless coating composition is described. The resulting coating has been shown to preserve the conductivity of the conductive layer and protect the conductive layer from the effects of subsequent coating compositions. Examples are shown in which the coating formulation comprises a polyol and an isocyanate. A layer material comprising a polyurethane coating on a carbon nanotube network layer is also described.

Abstract: The present invention relates to a plasticizer composition which comprises at least one polymeric dicarboxylic ester and at least one dialkyl terephthalate, to molding compositions which comprise a thermoplastic polymer or an elastomer and such a plasticizer composition, and the use of these plasticizer compositions and molding compositions.

Abstract: The present disclosure provides coating compositions free of acrylates and epoxies for use in dry-erase surface preparations and protective floor coverings.

Abstract: The invention relates to a plasticizer composition containing at least one polymer dicarboxylic acid ester, to molding compounds containing a thermoplastic polymer or a elastomer and a plasticizer composition of said type, and to the use of said plasticizer compositions and molding compounds.

Abstract: Polyester polymers are described comprising polymerized units comprising a hydroxy functional aromatic group wherein the hydroxy group has been functionalized with an adhesion promoting group. In some embodiments, the polyester polymer comprises polymerized units have the general structure (A) wherein L1 and L2 are independently divalent linking groups comprising an ester group; and RA is an adhesion promoting group bonded to the oxygen atom by means of an ionic or covalent bond. In other embodiments, film articles, laminates are described and methods of making functionalized polyester polymers are described.

Abstract: A process for the production of expanded foam beads that are prepared from pellets comprising polyester mixture comprising a) from 50 to 99% by weight, based on components a and b, of a biodegradable polyester based on aliphatic, or a mixture of aliphatic and aromatic, dicarboxylic acids and an aliphatic diol, and b) from 1 to 50% by weight, based on components a and b, of polylactic acid, the process comprising the following steps: (i) providing an aqueous suspension of the polyester pellets, (ii) impregnating the pellets in the suspension of step (i) with at least one physical or chemical blowing agent to provide blowing-agent-loaded pellets in suspension, wherein the impregnation of the at least one blowing agent includes heating the mixture to a depressurization temperature IMT with stirring, and (iii) depressurizing the suspension obtained in step (ii) to provide the expanded foam beads.

Abstract: A silylated polyurethane obtainable by a process comprising the following steps: (a) reacting at least one polyol with at least one triisocyanate to form a hydroxyl-terminated polyurethane prepolymer, and (b) reacting said polyurethane prepolymer with at least one isocyanatosilane of the formula (1): OCN—R—Si—(X)m(R1)3?m, wherein m is 0, 1 or 2, each R1 is independently from each other a hydroxyl group, an alkoxy group having 1 to 10 carbon atoms, an acyloxy group having 1 to 10 carbon atoms, or —OCH(R2)COOR3, wherein R2 is hydrogen or an alkyl group having 1 to 4 carbon atoms and R3 is a straight-chain or branched alkyl group having 1 to 8 carbon atoms, each X is independently from each other and optionally substituted hydrocarbon group having 1 to 10 carbon atoms, which can be interrupted by at least one heteroatom, and R is a difunctional organic group, to endcap the hydroxyl groups on said prepolymer with said isocyanatosilane.

Abstract: A number of variations may include a product including a fluid additive including at least one asphaltene dispersant/inhibitor including a branched dendritic core and at least one carboxylic acid moiety.

Abstract: Disclosed are monomeric compounds which may be polymerized to form novel biodegradable and bioresorbable polymers and co-polymers. These polymers and co-polymers, while not limited thereto, may be adapted for radioopacity and are useful for medical device applications and controlled release therapeutic formulations.

Abstract: The present invention relates to a high elastic primer composition. The high elastic primer composition comprises: a hard urethane-modified polyester in an amount of about 10 to 20 wt %, a soft urethane-modified polyester in an amount of about 5 to 20 wt %, a polycaprolactone in an amount of about 1 to 10 wt %, a polymer resin 20 to 50 wt %, an extender pigment 0.1 to 20 wt % and a solvent 15 to 50 wt %, based on the total weight of the primer composition.

Abstract: A polyester-containing object, such as an injection stretch blow molded bottle, a biaxially oriented film or a drawn fiber, is made from melt-processing poly(ethylene-2,5-furandicarboxylate). The poly(ethylene-2,5-furandicarboxylate) has a number average molecular weight of at least 25,000, as determined by GPC based on polystyrene standards, and includes an antimony catalyst.

Abstract: A modified polyester resin composition comprises a combination of a PET polyester, a PCT polyester, a CHDM modified copolyester comprising PCTA, PCTG or PETG, and a modified polymer at least comprising TPU or EPDM, wherein the modified polymer accounts for 3-25 wt % and the rest accounts for 97-75 wt %, based on the total weight of the resin; and the modified polyester resin composition is suited for use in a halogen-free, heavy metal-free, and volatile organic compound-free polyester-based plastic floor tile excellent in higher resistance to wear and tear, better tensile strength, more preferable resistance to both lit cigarette e and solvents, and particularly being friendliness to environment and not hazardous to health.

Abstract: A process for producing expanded foam beads from pellets comprising at least one biodegradable polyester. The process comprises (i) producing a suspension comprising pellets in an aqueous suspension medium, (ii) impregnating the pellets present in the suspension from step (i) with at least one physical blowing agent by heating the pellet suspension to a depressurization temperature IMT, with stirring, to provide pellets laden with blowing agent in the suspension medium, and (iii) depressurizing the suspension obtained in step (ii) and cooling the depressurized suspension with a liquid aqueous coolant, in order to obtain the expanded foam beads. The blowing agent can be added in step I, or in step ii during the heating phase or following the heating phase. Following the heating phase, the suspension is maintained at a temperature in the range from IMT minus 5° C. to IMT plus 2° C. for 3 to 100 minutes, and the ratio of aqueous coolant to suspension medium is at least 0.3.

Abstract: A polyester, including ethylene 2,5-furandicarboxylate units, has an intrinsic viscosity of at least 0.45 d L/g, and has a relative content of carboxylic acid end groups, expressed as the fraction of the molar amount of carboxylic acid end groups divided by the sum of the molar amounts of hydroxyl end groups and carboxylic acid end groups in the range of 0.10 to 0.70. The polyester can be prepared with a method wherein a starting mixture comprising 2,5-furandicarboxylic acid and ethylene glycol is subjected to esterification and subsequent polycondensation at reduced pressure when the molar ratio of 2,5-furandicarboxylic acid to ethylene glycol in the starting mixture is 1:1.01 to 1:1.15, where water, that is formed during the reaction between 2,5-furandicarboxylic acid and ethylene glycol, and some ethylene glycol are removed in a distillation system, and where ethylene glycol that is removed with water, is separated from water and at least partly recycled.

Abstract: Disclosed herein is a fluid flow improver comprising a branched dendritic core comprising a first quaternary carbon center bonded to four second carbon atoms, wherein at least three of the four second carbon atoms are individually bonded to one or more chain extender ligands to produce the branched dendritic core, wherein the branched dendritic core has greater than or equal to about 16 terminal hydroxyl groups, and wherein at least one of the terminal hydroxyl groups is esterified with at least one carboxylic acid moiety comprising from 6 to 30 carbon atoms. Methods of inhibiting deposition of paraffin and reducing pour point temperature of a hydrocarbon fluid are also disclosed.

Abstract: The invention relates to novel demulsifiers for use in the demulsification of oils from water and vice versa, including the demulsification of crude oil from sea water or brine. In particular, the present invention relates to novel demulsifiers which are environmentally friendly, or ‘green’, and which can be used without restriction on-site in offshore oil drilling fields, for example in the North Sea. The novel demulsifiers are based on the reaction product of alkoxylated polyols or polyol esters with dicarboxylic acids.

Abstract: A process for preparing a polymer having a 2,5-furandicarboxylate moiety within the polymer backbone and having a number average molecular weight of at least 10,000 (as determined by GPC based on polystyrene standards) includes a first step where a prepolymer is made having the 2,5-furandicarboxylate moiety within the polymer backbone, followed in a second step by a polycondensation reaction. Polymers so produced may have a 2,5-furandicarboxylate moiety within the polymer backbone, and having a number average molecular weight of at least 20,000 (as determined by GPC based on styrene standards), and an absorbance as a 5 mg/mL solution in a dichloromethane:hexafluoroisopropanol 8:2 at 400 nm of below 0.05.

Abstract: By forming a polyester film from a polyester resin composition including ketene imine compound represented by the following Formula (1) and polyester, the polyester film having excellent hydrolysis resistance in which volatilization of the ketene imine compound or the ketene compound can be suppressed. In Formula (1), R1 and R2 represent an alkyl group, an aryl group, an alkoxy group, an alkoxycarbonyl group, an aminocarbonyl group, an aryloxy group, an acyl group, or an aryloxycarbonyl group, and the R1—C(?C)—R2 substructure has a molecular weight of 320 or greater. R3 represents an alkyl group or an aryl group.

Abstract: The process for recycling and de-vulcanizing vulcanized rubber comprises the steps of: grinding said rubber in a mill in order to shred it into particles having a size substantially comprised between 5 and 15 mm; introducing the particles in an initial section of a two-screw co-rotating extruder having a length 64 times or more the external diameter of the screws, mixing the particles within the extruder, which is kept at a temperature comprised between 35 and 350° C., due to the screw rotation at a speed comprised between 15 and 300 rpm; and obtaining an extruded product formed by de-vulcanized rubber.

Abstract: The invention provides a polyester film including: a polyester substrate; and a layered portion that is disposed on at least one surface of the polyester substrate and has an elastic modulus of from 5 MPa to 800 MPa, a ratio of a peak intensity at 988 cm?1 that is observed by subjecting a surface of the polyester substrate to infrared spectroscopy to a peak intensity at 1410 cm?1 that is observed by subjecting a surface of the polyester substrate to infrared spectroscopy satisfying the following Inequality (I): 0.010?(peak intensity at 988 cm?1)/(peak intensity at 1410 cm?1)?0.040??(I).

Abstract: A process for producing an aliphatic polyester, comprising: subjecting at least two serial stages of bulk-phase ring-opening polymerization and a solid-phase polymerization step, wherein a cyclic ester held in a dry air atmosphere is supplied to a first reactor to perform a first stage polymerization, thereby obtaining a partially polymerized molten product, and the resultant partially polymerized molten product is supplied to a second reactor held under a dry inert gas atmosphere to perform a second stage polymerization. As a result, the production efficiency can be improved, while maintaining excellent properties of the aliphatic polyester product.

Abstract: An ultra-high IV polyester suitable for high melt strength end-uses, such as injection blow molding, pipe extrusion, profile extrusion, and extrusion blow molding, is provided, having IV of greater than 0.9; and a process for its production having high IV lift rate during SSP processing.

Abstract: A polymer compound comprising a constituent unit represented by the formula (1), the formula (2), the formula (3) or the formula (4) can be utilized for producing an organic film solar battery showing high open end voltage: (in the formulae (1) to (4), Ar1 represents a tri-valent aromatic carbocyclic group or a tri-valent aromatic heterocyclic group. Ar2 represents a tetra-valent aromatic carbocyclic group or a tetra-valent aromatic heterocyclic group. Z represents —O—, —S—, —C(C?O)—, —S(?O)—, —SO2—, —Si(R)2—, —N(R)—, —B(R)—, —P(R)— or —P(?O)(R)—. R represents a hydrogen atom, a halogen atom or a mono-valent group.).

Abstract: Disclosed is a hyperbranched, dendritic, hydroxyl-functional polyester comprising an OH number greater than or equal to 180 mg KOH/g as measured via DIN 53240 and to clearcoat compositions comprising said polyesters. Also disclosed are processes for preparing the disclosed polyester, methods of making coated automotive substrates by applying the disclosed clearcoat compositions to automotive substrates, and to coated substrates made therefrom.