Description

Poly(p-Hydroxystyrene) is a high-purity phenolic polymer derived from the monomer p-hydroxystyrene, known for its reactive phenolic hydroxyl groups along the polymer chain. This chemical structure makes it a critical precursor and functional material in advanced manufacturing processes, particularly in the electronics and specialty polymer industries. It is essential for R&D and production teams in semiconductor photoresists, epoxy curing agents, and pharmaceutical intermediates, where precise chemical functionality and purity are paramount.

Application

• Photoresist Polymers: A key raw material in the synthesis of chemically amplified photoresists for deep-UV and EUV lithography in semiconductor manufacturing.
• Epoxy Resin Modifiers & Curing Agents: Used to introduce phenolic functionality, improving thermal stability, adhesion, and cross-linking density in high-performance epoxy systems.
• Pharmaceutical Intermediates: Serves as a polymeric scaffold or protecting group reagent in the synthesis of complex drug molecules and controlled-release formulations.
• Ion-Exchange Resins: Acts as a precursor for manufacturing strong acid cation exchange resins after sulfonation, used in water purification and catalysis.
• Adhesive & Coating Additives: Enhances compatibility, adhesion promotion, and chemical resistance in specialty coatings, inks, and adhesives.
• Polymer Blending & Compatibilization: Utilized as a functional additive to improve the miscibility and properties of polymer blends.

Basic Information

Product Name	Poly(p-Hydroxystyrene)
CAS No.	24979-70-2
Molecular Formula	(C8H8O)n
Molecular Weight	Contact for details (Polymer)
Synonyms	Poly(4-hydroxystyrene); PHS; Poly(4-vinylphenol); PVPh; Poly(p-vinylphenol); 4-Ethenylphenol homopolymer; Poly(4-ethenylphenol); Phenolic resin (linear)
EINECS	Contact for details

Quality Control

Our Poly(p-Hydroxystyrene) is manufactured under strict quality management systems to ensure batch-to-batch consistency for critical applications. Quality is verified through a suite of analytical techniques including GPC (for molecular weight distribution), HPLC, FT-IR, and thermal analysis (DSC/TGA). A comprehensive Certificate of Analysis (COA) detailing purity, residual monomer content, and physical properties is provided with each shipment 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). This material is light-sensitive and should be kept in its original packaging until use to maintain stability.

Specification

Item	Specification
Appearance	White to off-white powder or beads
Identification (IR)	Conforms to standard
Assay (as Polymer)	≥ 98.0%
Residual Monomer (HPLC)	≤ 0.5%
Molecular Weight (Mw, GPC)	Customized (e.g., 5K - 20K Da)
Polydispersity Index (PDI)	≤ 2.0
Glass Transition Temp (Tg, DSC)	~150 - 180 °C
Loss on Drying	≤ 1.0%

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