Hydroxypropyl acrylate
Product Overview
Hydroxyethyl Acrylate (HEA) is a versatile monofunctional monomer and a key building block in polymer chemistry. It features a polymerizable acrylic double bond and a reactive hydroxyl group in the same molecule. This structure allows it to readily undergo copolymerization with a wide range of monomers while also participating in crosslinking reactions. It is a clear, colorless to light yellow liquid and is known for significantly enhancing the performance properties of final polymeric products, even when used in small quantities.
Specification
| Product Name | Hydroxypropyl acrylate |
| Chemical Formula | CH₃CHCOO(CH₂)₃OH |
| CAS Number | 25584-83-2 |
| EINECS Number | 247-113-0 |
| Product Appearance | Transparent liquid |
Quality Control Sheet
| Appearance | Colorless to light yellow transparent liquid without mechanical impurities |
| Monoester, w% | ≥ 93.0 |
| Purity (Total Ester), w% | ≥ 97.0 |
| Colour, Hazen | ≤ 30 |
| Water content, w% | ≤ 0.30 |
| Acidity (as acrylic acid), w% | ≤ 0.30 |
| Inhibitor (MEHQ), mg/kg | 300±50 |
Hydroxypropyl Acrylate Key Specifications
| Appearance | Clear, colorless to light yellow liquid |
| Purity (%) | ≥ 96.0 (typically > 99.0) |
| Water Content (%) | ≤ 0.5 |
| Inhibitor (MEHQ) | 200 ± 20 ppm |
| Acid Value (mg KOH/g) | ≤ 1.0 |
| Color (APHA) | ≤ 30 |
| Density (20 °C) | ~ 1.05 g/cm³ |
| Boiling Point | ~ 77 °C (at 5 mmHg) |
Hydroxypropyl Acrylate Main Applications
HPA's dual functionality allows it to be used across diverse industries. Its primary function is to act as a reactive diluent and a crosslinking site provider.
Coatings & Inks:
Thermosetting Coatings: Serves as a co-monomer in automotive, industrial, and coil coatings. It crosslinks with melamine, isocyanate, or epoxy resins, resulting in films with excellent hardness, chemical resistance, mar resistance, and high gloss.
Radiation-Curable Systems: Used in UV/EB-curable coatings, inks, and adhesives. The hydroxyl group allows for the formulation of urethane acrylates with enhanced properties.
Photoresist Resins: A key component in photo-sensitive resins for semiconductor and display manufacturing.
Adhesives & Sealants:
Improves adhesion to difficult-to-bond substrates like metals and treated plastics.
Enhances crosslink density, leading to improved heat resistance, chemical resistance, and cohesive strength in pressure-sensitive adhesives (PSAs) and structural adhesives.
Textiles & Fibers:
Used as a fiber treatment agent to modify synthetic fibers, improving dyeability, antistatic properties, and moisture absorption.
Synthetic Resins & Plastics:
As a modifier for acrylic and other synthetic resins, Hydroxypropyl acrylate imparts superior weather resistance, impact resistance, and flexibility.
Hydroxypropyl Acrylate Other Applications:
Paper Processing: As a strength resin and coating component.
Water Treatment Chemicals: Used in the synthesis of scale and corrosion inhibitors.
Lubricant Additives: Acts as a precursor for viscosity index improvers and dispersants.
Hydroxypropyl Acrylate Key Features & Benefits
Excellent Reactivity: The acrylate group readily copolymerizes with a wide range of vinyl and acrylic monomers (e.g., methyl methacrylate, butyl acrylate, styrene, acrylonitrile).
Powerful Crosslinking Capability: The pendant hydroxyl group readily reacts with diisocyanates, anhydrides, and amino resins (e.g., melamine), enabling the formation of durable, three-dimensional polymer networks.
Enhanced Adhesion: Promotes strong bonding to various substrates.
Durability Improvement: Contributes to outstanding resistance to chemicals, solvents, weathering, and UV light.
Versatility: Can be used in a vast array of polymerization processes, including solution, emulsion, suspension, and bulk polymerization.
Performance Efficiency: Delivers significant improvements in final product properties even at low usage levels (typically 1-10%).
Handling & Storage
Storage: Store in a cool, dark, and well-ventilated area. Keep containers tightly closed. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F).
Inhibitor: Contains MEHQ (Methoxyphenol) as a polymerization inhibitor to prevent self-polymerization during storage and transport. It is essential to maintain this inhibitor for stability.
Handling: Avoid contact with heat, sparks, open flames, and strong oxidizing agents. Use with adequate ventilation and wear appropriate personal protective equipment (PPE), including chemical-resistant gloves, safety goggles, and protective clothing.
Shelf Life: Typically 12 months from the date of manufacture when stored under recommended conditions.