Description

1,3-Benzenedicarboxylic Acid, Polymer With 1,4-Benzenedicarboxylic Acid, 1,3-Dihydro-1,3-Dioxo-5-Isobenzofurancarboxylic Acid And 2,2-Dimethyl-1,3-Propanediol CAS NO 87726-51-0 is a high-performance, specialized copolyester resin engineered for demanding industrial applications. This polymer offers a unique balance of thermal stability, chemical resistance, and mechanical properties derived from its tailored monomer composition. It is a critical material for manufacturers in the coatings, adhesives, and specialty plastics sectors seeking to enhance product durability and performance.

Application

• High-Performance Industrial Coatings: Used as a resin binder in powder coatings and coil coatings requiring excellent weatherability, corrosion resistance, and adhesion to metal substrates.
• Specialty Adhesives and Sealants: Serves as a key polymeric component in formulations that demand strong bonding, flexibility, and resistance to chemicals and environmental stress.
• Engineering Plastics and Composites: Acts as a modifier or primary resin in composite materials to improve heat distortion temperature, dimensional stability, and mechanical strength.
• Electrical Insulation Materials: Utilized in wire enamels and insulating varnishes due to its good dielectric properties and thermal endurance.
• Automotive Components: Applied in under-the-hood parts and exterior trim where resistance to fuels, oils, and high temperatures is essential.
• Decorative and Functional Films: Employed in the production of films for packaging or industrial laminates that require clarity, toughness, and barrier properties.

Basic Information

Product Name	1,3-Benzenedicarboxylic Acid, Polymer With 1,4-Benzenedicarboxylic Acid, 1,3-Dihydro-1,3-Dioxo-5-Isobenzofurancarboxylic Acid And 2,2-Dimethyl-1,3-Propanediol
CAS No.	87726-51-0
Molecular Formula	(C8H6O4 • C8H6O4 • C9H4O5 • C5H12O2)x
Molecular Weight	Polymeric substance (Contact for details)
Synonyms	Copolyester of Isophthalic Acid, Terephthalic Acid, Trimellitic Anhydride, and Neopentyl Glycol; Neopentyl Glycol-Terephthalic Acid-Isophthalic Acid-Trimellitic Anhydride Copolymer; Poly(NPG/TPA/IA/TMA); NPG/TPA/IA/TMA Copolyester Resin; Trimellitic Anhydride-Modified Polyester Resin; Acid-functional Copolyester based on NPG, TPA, IA, and TMA; Thermosetting Polyester Resin (acid type)
EINECS	Contact for details

Quality Control

Our production of this copolyester resin adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as acid value, hydroxyl value, viscosity, glass transition temperature (Tg), and color are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all specification results is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong alkalis and incompatible organic solvents. The product is typically supplied in solid form (chips or pellets); protect from moisture to prevent caking or property changes.

Specification

Item	Specification
Appearance	White to off-white chips or pellets
Acid Value (mg KOH/g)	20 - 50
Hydroxyl Value (mg KOH/g)	Contact for details
Viscosity (mPa·s, @ specific conc. & temp)	Contact for details
Glass Transition Temperature (Tg)	45 - 70 °C
Color (Gardner)	≤ 3
Softening Point (Ring & Ball)	90 - 120 °C

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.