Description

1,4-Benzenedicarboxylic acid, polymer with 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid, 2,2-dimethyl-1,3-propanediol and rel-(3aR,7aS)-hexahydro-1,3-isobenzofurandione CAS NO 126191-58-0 is a high-performance, specialty polyester copolymer engineered for demanding applications. This material offers a unique balance of thermal stability, chemical resistance, and mechanical properties derived from its complex polymeric structure. It is primarily utilized by advanced material formulators and polymer engineers in sectors requiring durable, high-performance coatings, adhesives, and engineering plastics.

Application

• High-Performance Industrial Coatings: Formulated for automotive, aerospace, and marine coatings requiring exceptional weatherability, gloss retention, and chemical resistance.
• Specialty Adhesives and Sealants: Used as a key resin component in structural adhesives and potting compounds where strong bonding and environmental durability are critical.
• Engineering Thermoplastics and Composites: Serves as a modifier or base resin in composite materials for electrical components, automotive parts, and industrial machinery.
• Powder Coatings: An essential polymer for durable, decorative, and functional powder coatings applied to metal substrates.
• Wire and Cable Insulation: Imparts thermal stability and flame retardancy in insulating materials for electrical applications.
• Can and Coil Coatings: Provides excellent adhesion and corrosion resistance for metal packaging and pre-coated steel/aluminum coils.

Basic Information

Product Name	1,4-Benzenedicarboxylic acid, polymer with 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid, 2,2-dimethyl-1,3-propanediol and rel-(3aR,7aS)-hexahydro-1,3-isobenzofurandione
CAS No.	126191-58-0
Molecular Formula	(C8H6O4·C10H6O5·C5H12O2·C8H10O3)n
Molecular Weight	Polymer - Contact for details
Synonyms	Poly(neopentyl glycol isophthalate-co-terephthalate) modified with hexahydrophthalic anhydride; Polyester resin based on TPA, IPA, NPG, and HHPA; Terephthalic acid-isophthalic acid-neopentyl glycol-hexahydrophthalic anhydride copolymer; NPG-modified polyester copolymer; HHPA-modified aromatic polyester; Thermoplastic polyester copolymer; Powder coating resin 126191-58-0
EINECS	Contact for details

Quality Control

Our production of this advanced polymer adheres to strict quality management systems, ensuring batch-to-batch consistency for critical formulation parameters. Quality is verified through comprehensive testing of key properties including acid value, hydroxyl value, viscosity, glass transition temperature (Tg), and color. A Certificate of Analysis (COA) detailing these specifications is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and open flame. This polymer is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption which can affect processing characteristics.

Specification

Item	Specification
Appearance	White to off-white granules or powder
Acid Value (mg KOH/g)	5 - 15
Hydroxyl Value (mg KOH/g)	20 - 50
Viscosity (mPa·s, @ 200°C)	Contact for details
Glass Transition Temperature (Tg)	45 - 65 °C
Softening Point (Ring & Ball)	95 - 115 °C
Color (Gardner Scale)	≤ 2
Moisture Content	≤ 0.5 %

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