Description

1,3-Benzenedicarboxylic Acid, Polymer With 1,4-Benzenedicarboxylic Acid And 1,4-Butanediol is a high-performance copolyester resin, commonly known as a modified polybutylene terephthalate (PBT) copolymer. This engineered polymer offers a critical balance of mechanical strength, thermal stability, and chemical resistance for demanding industrial applications. It is essential for manufacturers in the automotive, electrical, and specialty plastics industries seeking to enhance product durability and performance.

Application

• Automotive Components: Used in under-the-hood parts, connectors, and sensor housings due to its heat resistance and dimensional stability.
• Electrical & Electronics: Ideal for insulating materials, circuit board components, and connector housings requiring good dielectric properties.
• Engineering Plastics: Serves as a key modifier in PBT blends to improve impact resistance, flow characteristics, and surface finish for injection molding.
• Fiber & Textile Industry: Employed in the production of high-tenacity and thermally stable industrial fibers.
• Consumer Appliances: Used in durable parts for power tools, kitchen appliances, and other housings requiring strength and heat tolerance.
• Industrial Films and Coatings: Provides a robust base for specialty coatings and films that require chemical and abrasion resistance.

Basic Information

Product Name	1,3-Benzenedicarboxylic Acid, Polymer With 1,4-Benzenedicarboxylic Acid And 1,4-Butanediol
CAS No.	30580-17-7
Molecular Formula	(C8H6O4 · C8H6O4 · C4H10O2)x
Molecular Weight	Polymer - Variable
Synonyms	Poly(butylene terephthalate-co-isophthalate); PBTI Copolymer; Poly(oxy-1,4-butanediyloxycarbonyl-1,4-phenylenecarbonyl-co-oxy-1,4-butanediyloxycarbonyl-1,3-phenylenecarbonyl); Butanediol/Terephthalic Acid/Isophthalic Acid Copolymer; Modified PBT; PBIT; Isophthalic Acid-modified Polybutylene Terephthalate; Terephthalic Acid-Isophthalic Acid-1,4-Butanediol Copolymer
EINECS	Contact for details

Quality Control

Our copolymer is produced under strict quality management systems to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive testing including intrinsic viscosity, melting point, and compositional analysis. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance and regulatory compliance needs.

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 strong oxidizing agents and excessive heat sources to maintain polymer integrity.

Specification

Item	Specification
Appearance	White to off-white pellets or powder
Intrinsic Viscosity (IV)	0.6 - 1.2 dL/g (Typical)
Melting Point (DSC)	190 - 220 °C
Isophthalic Acid Content	5 - 30 mol%
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.