Description

1,3-Benzenedicarboxylic Acid, Polymer With 1,4-Benzenedicarboxylic Acid, 1,4-Butanediol And Hexahydro-1,3-Isobenzofurandione CAS NO 68133-51-7 is a high-performance, modified polyester resin designed for advanced material applications. This polymer offers a unique balance of thermal stability, chemical resistance, and mechanical properties, making it a critical component for demanding industrial formulations. It is primarily sought by manufacturers in the coatings, adhesives, and specialty plastics sectors seeking to enhance product durability and performance.

Application

• High-Performance Industrial Coatings: Used as a key resin in powder coatings, coil coatings, and can linings for superior corrosion resistance and weatherability.
• Specialty Adhesives and Sealants: Serves as a base polymer for structural adhesives and high-strength sealants requiring excellent bond strength and chemical inertness.
• Engineering Thermoplastics: Incorporated as a modifier or primary resin in composite materials and molded parts to improve heat deflection temperature and dimensional stability.
• Electrical Insulation Materials: Utilized in the formulation of 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 environmental stress cracking is essential.
• Industrial Fiber and Film: Acts as a polymer matrix for advanced fibers or as a base for high-barrier packaging films.

Basic Information

Product Name	1,3-Benzenedicarboxylic Acid, Polymer With 1,4-Benzenedicarboxylic Acid, 1,4-Butanediol And Hexahydro-1,3-Isobenzofurandione
CAS No.	68133-51-7
Molecular Formula	(C8H6O4 · C8H6O4 · C4H10O2 · C9H10O4)n
Molecular Weight	Polymer - Contact for details
Synonyms	Poly(isophthalate-co-terephthalate-co-butylene terephthalate-co-trimellitate); Poly(butylene isophthalate-co-terephthalate) modified with trimellitic anhydride; PBIT Copolymer; Modified PBT Resin; Polyester resin from isophthalic acid, terephthalic acid, 1,4-butanediol and trimellitic anhydride; 1,4-Butanediol/isophthalic acid/terephthalic acid/trimellitic anhydride copolymer
EINECS	Contact for details

Quality Control

Our production of this specialty polyester adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as acid value, hydroxyl value, viscosity, and glass transition temperature (Tg) are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive) and must be stored in a cool, dry place at 15-25°C. Ensure the storage area is well-ventilated and away from incompatible materials. Once opened, containers should be resealed immediately to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white granules or powder
Identification (IR)	Conforms to structure
Acid Value	≤ 5.0 mg KOH/g
Hydroxyl Value	Contact for details
Viscosity (25°C, 40% in NMP)	Contact for details
Glass Transition Temperature (Tg)	Contact for details
Moisture Content	≤ 0.5%
Ash Content	≤ 0.1%

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