Description

1,4-Benzenedicarboxylic Acid,Polymer With [1,1'-Biphenyl]-4,4'-Diol And 4-Hydroxybenzoic Acid CAS NO 31072-56-7 is a high-performance engineering thermoplastic, specifically a member of the polyarylate family. This polymer is valued for its exceptional balance of thermal stability, mechanical strength, and optical clarity, making it a superior material for demanding applications. It is primarily sought by manufacturers in the electronics, automotive, and specialty film industries where durability under harsh conditions is critical.

Application

• High-Temperature Electrical Components: Used in connectors, sockets, and insulating films due to its excellent dielectric properties and heat resistance.
• Automotive Under-the-Hood Parts: Ideal for sensor housings, lamp reflectors, and other components requiring long-term thermal and dimensional stability.
• Optical Films and Lenses: Employed in light guides, display substrates, and protective covers where high transparency and UV resistance are needed.
• Medical Device Housings: Suitable for equipment that requires repeated sterilization (autoclaving) and chemical resistance.
• Industrial Membranes and Filters: Used in filtration applications that involve exposure to aggressive chemicals or elevated temperatures.
• Consumer Electronics Housings: Provides a robust, heat-resistant, and aesthetically clear material for device casings.

Basic Information

Product Name	1,4-Benzenedicarboxylic Acid,Polymer With [1,1'-Biphenyl]-4,4'-Diol And 4-Hydroxybenzoic Acid
CAS No.	31072-56-7
Molecular Formula	(C14H10O4.C8H6O4.C7H6O3)x
Molecular Weight	Polymer - Contact for details
Synonyms	Polyarylate; PAR; Poly(bisphenol A terephthalate); Poly(bisphenol-A terephthalate-co-isophthalate); U-Polymer; Arylite; 2,2-Bis(4-hydroxyphenyl)propane polymer with terephthalic acid and isophthalic acid; Poly(4,4'-isopropylidenediphenylene terephthalate-co-isophthalate)
EINECS	Contact for details

Quality Control

Our production of this polyarylate adheres to strict quality management systems to ensure batch-to-batch consistency for critical performance parameters like intrinsic viscosity, thermal properties, and color. Quality is verified through advanced analytical techniques including Gel Permeation Chromatography (GPC), Differential Scanning Calorimetry (DSC), and FT-IR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment.

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 acids, strong bases, and excessive heat sources to maintain polymer integrity. The material is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption which can affect processing.

Specification

Item	Specification
Appearance	Pale yellow to transparent pellets or powder
Identification (IR)	Conforms to standard
Intrinsic Viscosity	0.50 - 0.70 dL/g (Typical)
Glass Transition Temperature (Tg)	> 180 °C
Melting Point	Amorphous polymer
Moisture Content	< 0.1 %
Ash Content	< 50 ppm
Yellow Index	< 10 (Typical)

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