Description

Poly(2-Hydroxyethyl Methacrylate/Methacrylic Acid) is a synthetic copolymer of 2-hydroxyethyl methacrylate (HEMA) and methacrylic acid (MAA), offering a unique combination of hydrophilicity, biocompatibility, and pH-responsive behavior. This material is essential for applications requiring controlled water absorption, adhesion to moist surfaces, and tunable swelling properties. It is a critical raw material for manufacturers in the pharmaceutical, medical device, personal care, and advanced adhesive industries seeking functional polymer performance.

Application

• Contact Lenses and Ophthalmic Devices: A key component in hydrogel formulations for soft contact lenses due to its high water content, oxygen permeability, and comfort.
• Drug Delivery Systems: Used in the matrix of controlled-release tablets, transdermal patches, and implantable devices where pH-dependent swelling controls active ingredient release.
• Medical Hydrogels & Wound Dressings: Serves as a base polymer for creating absorbent, biocompatible hydrogels used in advanced wound care and burn treatment products.
• Personal Care & Cosmetic Formulations: Employed as a film-forming agent, thickener, and stabilizer in hair gels, skin creams, and mascara for enhanced texture and performance.
• Pressure-Sensitive Adhesives (PSAs): Imparts tack, adhesion to skin, and moisture resistance in medical tapes, electrode gels, and transdermal delivery systems.
• Dental Materials: Used in restorative resins, denture bases, and cavity liners for its bonding strength and compatibility with oral environments.
• Chromatography Media: Functionalized as a stationary phase in HPLC columns for the separation of biomolecules, leveraging its hydrophilic and ionic interaction capabilities.
• Bio-sensing & Diagnostic Devices: Acts as an immobilization matrix for enzymes and proteins in biosensor membranes due to its hydrogel properties and functional groups for covalent attachment.

Basic Information

Product Name	Poly(2-Hydroxyethyl Methacrylate/Methacrylic Acid)
CAS No.	31693-08-0
Molecular Formula	(C6H10O3)x(C4H6O2)y
Molecular Weight	Varies by monomer ratio (typically 10k - 500k Da)
Synonyms	Poly(HEMA-co-MAA); 2-Hydroxyethyl methacrylate/Methacrylic acid copolymer; HEMA/MAA copolymer; Poly(2-hydroxyethyl methacrylate-co-methacrylic acid); Hydrogel copolymer; P(HEMA-co-MAA); Acrylic hydrogel polymer; Methacrylic acid polymer with 2-hydroxyethyl methacrylate
EINECS	Contact for details

Quality Control

Our Poly(2-Hydroxyethyl Methacrylate/Methacrylic Acid) is manufactured under a strict quality management system. Each batch undergoes rigorous testing to ensure consistent monomer ratio, molecular weight distribution, and functional performance. Certificates of Analysis (COA) are provided with each shipment, detailing key parameters such as assay, residual monomers, and viscosity. We support compliance with relevant ISO standards and can tailor specifications to meet specific cGMP or USP Class VI requirements for medical-grade applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent moisture absorption, which can affect physical properties and processability.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Identification (IR)	Conforms to structure
Monomer Ratio (HEMA:MAA)	As per grade (e.g., 70:30)
Assay (Solid Content)	≥ 98.0 %
Residual Monomers (HPLC)	≤ 0.5 %
Moisture Content (KF)	≤ 3.0 %
pH (in solution)	3.0 - 6.0 (1% w/v)
Viscosity (Brookfield)	Reported per grade
Glass Transition Temp (Tg)	Reported per grade

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