Description

Poly(4-Hydroxybenzoic Acid) is a high-performance, semi-crystalline engineering polymer belonging to the aromatic polyester family, known for its exceptional thermal stability, chemical resistance, and mechanical properties. This material is critical for applications demanding reliability under extreme conditions where conventional polymers fail. It serves as a vital raw material and performance additive for manufacturers in the electronics, automotive, aerospace, and specialty plastics compounding industries.

Application

• High-Temperature Engineering Plastics: As a monomer or comonomer for producing liquid crystal polymers (LCPs) and other aromatic polyesters used in connectors, sockets, and under-the-hood automotive components.
• Advanced Composite Materials: Reinforcement in composites requiring superior heat resistance, dimensional stability, and low flammability for aerospace and military applications.
• Specialty Coatings & Adhesives: Formulation of high-performance coatings, sealants, and adhesives that must withstand aggressive chemical environments and elevated temperatures.
• Electronic Encapsulation: Used in potting compounds and encapsulants for semiconductors and electronic modules to provide excellent insulation and thermal management.
• Fiber Production: Spinning into high-strength, high-modulus fibers for industrial and technical textiles.
• Additive for Polymer Modification: Enhancing the thermal and barrier properties of other polymers like PBT, PET, and polyamides through blending.

Basic Information

Product Name	Poly(4-Hydroxybenzoic Acid)
CAS No.	26099-71-8
Molecular Formula	(C7H4O3)n
Molecular Weight	Variable (Polymer)
Synonyms	Poly(p-hydroxybenzoic acid); P-HBA Polymer; Poly(4-hydroxybenzoate); Aromatic Polyester from 4-Hydroxybenzoic Acid; Poly(oxy-4-hydroxybenzoyl); p-Oxybenzoyl Polymer; Poly(4-carboxyphenoxy); LCP Monomer (precursor)
EINECS	Contact for details

Quality Control

Our Poly(4-Hydroxybenzoic Acid) is manufactured under a stringent quality management system. Each batch is characterized for critical parameters including inherent viscosity, thermal transition temperatures, and residual monomer content to ensure batch-to-batch consistency and performance. Certificates of Analysis (COA) detailing these specifications are provided and available upon request to support your quality assurance protocols.

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). The product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture, which can affect processing characteristics.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Identification (IR)	Conforms to structure
Inherent Viscosity	Contact for details
Melting Point (DSC)	> 300 °C
Residual Monomer (HPLC)	< 1.0%
Ash Content	< 0.1%
Moisture Content (KF)	< 0.5%

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