Description

4-Hydroxybutyl Methacrylate is a bifunctional monomer containing both a polymerizable methacrylate group and a terminal hydroxyl group. This unique structure makes it a valuable building block for introducing cross-linking sites and hydrophilic properties into polymer chains. It is essential for formulators and polymer chemists seeking to create advanced materials with tailored performance. Key industries that utilize this monomer include specialty coatings, adhesives, UV-curable resins, and hydrogel contact lenses.

Application

• UV-Curable Coatings & Inks: Serves as a reactive diluent and cross-linking agent to enhance cure speed, adhesion, and flexibility.
• Hydrogel Polymers: A key monomer in the synthesis of soft contact lenses and other biomedical hydrogels due to its hydrophilic hydroxyl group.
• Adhesives & Sealants: Improves adhesion to various substrates and contributes to the toughness and weatherability of acrylic-based adhesive systems.
• Acrylic Resin Modification: Used to introduce pendant hydroxyl functionality for subsequent reactions, such as with isocyanates in polyurethane coatings.
• Fiber Optic Coatings: Imparts necessary flexibility and protective properties in primary and secondary coatings for optical fibers.
• Dental Composites: Functions as a co-monomer to reduce polymerization shrinkage and improve mechanical strength in restorative materials.
• Lithographic Printing Plates: Contributes to the photosensitive resin composition used in plate manufacturing.

Basic Information

Product Name	4-Hydroxybutyl Methacrylate
CAS No.	29008-35-3
Molecular Formula	C8H14O3
Molecular Weight	158.20 g/mol
Synonyms	4-Hydroxybutyl methacrylate; 4-HBMA; 2-Methyl-2-propenoic acid 4-hydroxybutyl ester; HEMA butyl ether; Tetramethylene glycol monomethacrylate; 4-Hydroxy-n-butyl methacrylate; 4-(Methacryloyloxy)butan-1-ol; Butyl glycol methacrylate (related)
EINECS	249-363-7

Quality Control

Our 4-Hydroxybutyl Methacrylate is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing, including assay (HPLC), identity confirmation (IR, NMR), and critical impurity profiling (inhibitor content, water). We provide Certificates of Analysis (COA) with each shipment to ensure traceability and compliance with your specifications. Our quality commitment supports applications in sensitive industries, including medical devices and electronics.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). Keep away from heat, sparks, and open flame. Due to its light-sensitive nature and reactivity with strong acids and organic solvents, ensure proper segregation in storage areas. For long-term storage, maintain under an inert atmosphere (e.g., nitrogen) to prevent premature polymerization.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Water Content (KF)	≤ 0.5 %
Inhibitor (MEHQ)	50 - 250 ppm
Acid Value (Titration)	≤ 1.0 mg KOH/g
Color (APHA)	≤ 50
Refractive Index (20°C)	1.444 - 1.448
Density (20°C)	1.010 - 1.030 g/cm³

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