Description

1,4-Benzenedicarboxylic Acid, Dimethyl Ester And Dimethylisophthalate, Polymer With 1,4-Butanediol CAS NO 30901-41-8 is a high-performance thermoplastic polyester copolymer, commonly known as a modified polybutylene terephthalate (PBT) resin. This engineered polymer is valued for its excellent mechanical strength, dimensional stability, and resistance to heat and chemicals, making it a superior material for demanding applications. It is primarily sought by manufacturers in the automotive, electrical, and industrial sectors for producing durable components.

Application

• Automotive Components: Used in under-the-hood parts, connectors, and housings requiring high heat resistance and mechanical integrity.
• Electrical & Electronics: Ideal for insulating materials, circuit board components, and connectors due to its excellent dielectric properties.
• Industrial Engineering Plastics: Serves as a key material for gears, bearings, and other precision-molded parts that demand low friction and high durability.
• Consumer Appliances: Employed in the manufacture of robust housings and functional parts for tools and household devices.
• Packaging Films: Used in specialized, high-barrier packaging applications where strength and chemical resistance are critical.

Basic Information

Product Name	1,4-Benzenedicarboxylic Acid, Dimethyl Ester And Dimethylisophthalate, Polymer With 1,4-Butanediol
CAS No.	30901-41-8
Molecular Formula	(C12H12O4 · C10H10O4 · C4H10O2)x
Molecular Weight	Polymer - varies by grade
Synonyms	Poly(butylene terephthalate-co-isophthalate); PBT/PBI Copolymer; Poly(1,4-butylene terephthalate-co-isophthalate); Modified PBT Resin; Thermoplastic Polyester Elastomer (TPE-E); Butanediol/Terephthalic Acid/Isophthalic Acid Copolymer; PBIT; Copolyester of 1,4-Butanediol, Dimethyl Terephthalate, and Dimethyl Isophthalate
EINECS	Contact for details

Quality Control

Our production of this copolymer adheres to stringent quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as intrinsic viscosity, melting point, and copolymer composition are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing specifications for each lot is available upon request, supporting 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 heat sources and open flames. As a polymer, it is generally stable under these conditions but should be protected from prolonged exposure to high humidity to prevent any potential hydrolysis or property degradation.

Specification

Item	Specification
Appearance	White to off-white pellets or granules
Intrinsic Viscosity (IV)	0.8 - 1.2 dL/g (Typical)
Melting Point (DSC)	200 - 225 °C
Isophthalate Content	5 - 30 mol% (Grade dependent)
Moisture Content	< 0.1 %
Ash Content	< 0.05 %

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