Description

1,3-Benzenedicarbonyl Dichloride, Polymer With 1,4-Benzenedicarbonyl Dichloride And 4,4'-(1-Methylethylidene)Bis[Phenol] is a high-performance engineering thermoplastic, specifically a polyarylate resin derived from isophthaloyl chloride, terephthaloyl chloride, and bisphenol A. This material matters for its exceptional combination of thermal stability, mechanical strength, and optical clarity, making it a superior alternative to standard polycarbonates in demanding environments. It is critically needed by manufacturers in the automotive, electronics, and aerospace sectors for components requiring durability under high heat and exposure to UV light.

Application

• High-Temperature Automotive Components: Used in under-the-hood parts, connectors, and lighting assemblies due to its heat resistance.
• Optical and Lighting Lenses: Ideal for LED lenses, light guides, and covers where clarity and UV stability are paramount.
• Electrical Insulation and Housings: Serves in circuit boards, connectors, and enclosures that require excellent dielectric properties and flame retardancy.
• Aerospace Interior and Exterior Parts: Applied in cabin components, ducting, and fairings for its strength-to-weight ratio and flame/smoke/toxicity (FST) performance.
• Medical Device Housings: Utilized for equipment that requires repeated sterilization and high impact resistance.
• Industrial Glazing and Safety Shields: Manufactured into sight glasses, machine guards, and protective barriers.

Basic Information

Product Name	1,3-Benzenedicarbonyl Dichloride, Polymer With 1,4-Benzenedicarbonyl Dichloride And 4,4'-(1-Methylethylidene)Bis[Phenol]
CAS No.	25639-68-3
Molecular Formula	(C14H12O2·C8H4Cl2O2)x
Molecular Weight	Polymer - Contact for details
Synonyms	Polyarylate; Bisphenol A/isophthaloyl chloride/terephthaloyl chloride copolymer; PAR; Poly(bisphenol A isophthalate-co-terephthalate); Poly(bisphenol A terephthalate-co-isophthalate); U-Polymer® (trade name); Arylef® (trade name); 2,2-Bis(4-hydroxyphenyl)propane polymer with isophthaloyl chloride and terephthaloyl chloride
EINECS	Contact for details

Quality Control

Our polyarylate resin is produced under a strict quality management system to ensure batch-to-batch consistency for critical applications. Quality is verified through comprehensive testing of key parameters including intrinsic viscosity, thermal properties (Tg, HDT), and mechanical strength. Certificates of Analysis (COA) detailing lot-specific results are available upon request, and production can adhere to relevant ISO standards.

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). This polymer is hygroscopic (moisture-sensitive); keep the original packaging sealed until use to prevent moisture absorption, which can affect processing and final properties.

Specification

Item	Specification
Appearance	Pale yellow to transparent pellets
Glass Transition Temperature (Tg)	~180 - 210 °C
Tensile Strength	> 70 MPa
Flexural Modulus	> 2000 MPa
Light Transmittance	> 85 %
Intrinsic Viscosity (IV)	0.50 - 0.80 dL/g
Moisture Content	< 0.05 %

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