Abstract: The present application relates to a polyester and the molded product thereof. Determined by aminolytic analysis, the polyester has a weight ratio of the second repeating unit of formula (ii) to the third repeating unit of formula (iii) is of 0.100 to 0.490 as determined by analysis of the polyester. The polyester of this application has ideal dyeing ability, heat resistance, and mechanical properties.

Abstract: The present disclosure provides a polyester including residues of formulas (i), (ii), (iii), and (iv): for example, terephthalic acid, for example, ethylene glycol, for example, cyclohexanedimethanol, and for example, tricyclodecane dimethanol, in which R1 is an aromatic group, R2 is a C2-C6 straight-chain hydrocarbon group, * represents a linking bond. Based on 100 mol % of a sum of the residues of the formula (ii), the formula (iii) and the formula (iv), a content of the residue of the formula (iii) ranges from 50 mol % to 85 mol %, and the residue of the formula (iv) ranges from 12 mol % to 40 mol %.

Abstract: A polyester is provided. The polyester comprises: at least one repeating unit represented by formula (i), wherein R1 is a C6-C16 aromatic hydrocarbyl; and repeating units derived from diols, wherein the repeating units derived from diols comprise at least one repeating unit represented by the following formula (ii) and at least one repeating unit represented by the following formula (iii), and wherein R2 to R5 in formula (ii) are independently hydrogen, methyl, or ethyl, wherein based on the total moles of the repeating units derived from diols, the amount of the repeating unit represented by the formula (ii) is 5 mol % to 50 mol %.

Abstract: Provided are a liquid crystal polymer resin and a formed material comprising the same. The liquid crystal polymer resin comprises a structure unit represented by Formula (I). The thermal weight loss of the liquid crystal polymer resin is greater than 0.038% and less than 0.108%. The formed material made from the liquid crystal polymer resin has tensile strength of 1300 kgf/cm2 or more, tensile modulus of 5000 MPa or more, and elongation at break of 8.0% or less. Besides, the formed material made from the recycled liquid crystal polymer resin contains similar mechanical properties as the formed material made from the one before recycling, which indicates that the recycled liquid crystal polymer resin has potential to product reprocessing and meet the requirement of green process.

Abstract: A polyester is provided. The polyester comprises: at least one repeating unit represented by formula (i), wherein R1 is a C6-C16 aromatic hydrocarbyl; and repeating units derived from diols, wherein the repeating units derived from diols comprise at least one repeating unit represented by the following formula (ii) and at least one repeating unit represented by the following formula (iii), and wherein R2 to R5 in formula (ii) are independently hydrogen, methyl, or ethyl, wherein based on the total moles of the repeating units derived from diols, the amount of the repeating unit represented by the formula (ii) is 5 mol % to 50 mol %.

Abstract: The present disclosure provides a polyester and a molded article. The polyester includes residues of formula (i), formula (ii), formula (iii), and formula (iv): in which R1 is an aromatic group, R2 is a C2-C6 straight-chain hydrocarbon group, * represents a linking bond. Based on 100 mol% of a sum of the residues of the formula (ii), the formula (iii) and the formula (iv), a content of the residue of the formula (iii) ranges from 50 mol% to 85 mol%, and the residue of the formula (iv) ranges from 12 mol% to 40 mol%.

Abstract: Disclosed is a polyester and molded article. The polyester includes residues of formula (i), formula (ii), and formula (iii): in which R1 is an arylene group; R2 is a C2-C6 straight-chain hydrocarbylene group; and * represents a linking bond. The polyester has a number average molecular weight not less than 15,000 and has a degree of dispersion ranged from 2.95 to 5.70.

Abstract: Disclosed is a polyester and molded article. The polyester includes residues of formula (i), formula (ii), and formula (iii): in which R1 is an aromatic group; R2 is a C2-C6 straight-chain hydrocarbon group; and * represents a linking bond. The polyester has a number average molecular weight not less than 15,000 and has a degree of dispersion ranged from 2.95 to 5.70.

Abstract: A polycarbonate polyester includes residues of following formula (1), formula (2) and formula (3): in which R1 is C2-C15 hydrocarbon group; R2 is C4-C16 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.

Abstract: An aliphatic polyester is provided. The aliphatic polyester comprises: a first structural unit represented by wherein R1 is absent or a C1 to C40 aliphatic hydrocarbyl; a second structural unit represented by wherein R2 is a C1 to C10 aliphatic hydrocarbyl; and a third structural unit derived from a first cross-linking agent, wherein the first cross-linking agent has three reactive functional groups, wherein at least one reactive functional group is a secondary or tertiary hydroxyl, with the proviso that the first cross-linking agent is not malic acid.

Abstract: A polyester and a method for manufacturing polyester are provided. The polyester comprises one or more repeating units derived from polyols and one or more repeating units derived from polybasic acids and contains phosphorus and a metal element, wherein one or more repeating units derived from polyols include a repeating unit derived from tricyclodecane dimethanol, the weight ratio of the phosphorus to the metal element ranges from 0.05 to 5.00, and the metal element is selected from the group consisting of Ti, Sn, Sb, Ge, Mn, Zn, Ca, Co, Pb, Al, Zr, and combinations thereof.

Abstract: A polycarbonate polyester includes residues of following formula (1), formula (2) and formula (3): in which R1 is C2-C15 hydrocarbon group; R2 is C4-C16 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.

Abstract: An aliphatic polyester is provided. The aliphatic polyester comprises: a first structural unit represented by wherein R1 is absent or a C1 to C40 aliphatic hydrocarbyl; a second structural unit represented by wherein R2 is a C1 to C10 aliphatic hydrocarbyl; and a third structural unit derived from a first cross-linking agent, wherein the first cross-linking agent has three reactive functional groups, wherein at least one reactive functional group is a secondary or tertiary hydroxyl, with the proviso that the first cross-linking agent is not malic acid.

Abstract: Compositions containing Tricyclodecane Dimethanol (TCCDM) and at least a second component, wherein the composition is characterized in a gas chromatography (GC) analysis, wherein the TCDDM is eluted at a retention time ranging from 12.4 minutes to 13 minutes, the second component is eluted at a retention time ranging from 11.8 minutes to 12.4 minutes, and the ratio of the area of elution peaks indicating the second component compared to the area of the elution peaks of the TCCDM is between 0.001:1 and 0.04:1. Useful products of the composition include polymers and optical materials.

Abstract: The present invention relates to a novel water soluble polyimide resin, which contains a hydrophilic functional group such as —OH, —COOH to increase the solubility of the polyimide resin in alkali aqueous solution, and is suitable for using as an insulation film in electronic and photoelectric products. The present invention also relates to preparation and use of the above polyimide.

Abstract: The present invention provides a phosphorus-containing compound of formula (I): wherein R1, R2, R3 and R4 are the same or different; and R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, halogen, C1-8 alkyl, haloalkyl, and alkoxy. The phosphorus-containing compound is prepared by bonding a bisphenol group to a phosphorus atom to prevent the phosphorus-containing heterocyclic molecule from exhibiting steric hindrance on hydroxyl functional groups, thereby increasing reactivity in the subsequent reactions.

Abstract: The present invention relates to a novel water soluble polyimide resin, which contains a hydrophilic functional group such as —OH, —COOH to increase the solubility of the polyimide resin in alkali aqueous solution, and is suitable for using as an insulation film in electronic and photoelectric products. The present invention also relates to preparation and use of the above polyimide.

Abstract: The present invention provides a phosphorus-containing compound of formula (I): wherein R1, R2, R3 and R4 are the same or different; and R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, halogen, C1-8 alkyl, haloalkyl, and alkoxy. The phosphorus-containing compound is prepared by bonding a bisphenol group to a phosphorus atom to prevent the phosphorus-containing heterocyclic molecule from exhibiting steric hindrance on hydroxyl functional groups, thereby increasing reactivity in the subsequent reactions.