Overview
Hydroxypropyl methacrylate (CAS 27813-02-1 ), commonly abbreviated as HPMA and also marketed as Rocryl 410, is a reactive monomer used to build functional acrylic polymer systems.
It introduces hydroxyl groups into polymer backbones, enabling controlled crosslinking, adhesion tuning, and surface reactivity across a broad range of industrial formulations.
In automotive and industrial coatings, HPMA reacts with isocyanates or melamine resins to produce two-component polyurethane and acrylic topcoats with defined cure profiles and film hardness.
Adhesive and sealant formulators incorporate it to improve substrate bonding and cohesive strength in structural and pressure-sensitive systems for various industrial applications.
In UV-curable printing inks and packaging coatings, it functions as a reactive diluent that reduces viscosity while contributing to crosslink density after the curing process is complete.
Electronics manufacturers use HPMA-based polymers in conformal coatings and encapsulants where controlled hydroxyl functionality supports adhesion to sensitive substrates and components.
Hydroxypropyl methacrylate is supplied as a clear liquid, typically as a mixture of the 2-hydroxypropyl and 1-methyl-2-hydroxyethyl isomers for standard industrial use.
Technical and industrial grades are the standard market offering, with inhibitor content specified to ensure storage stability. Packaging ranges from drums to IBC containers with 97% purity.
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Physical Properties
| Melting Point | -89 °C |
| Boiling Point | 96 °C |
| Density | 1.066 g/cm³ @ Temp: 25 °C |
| Flash Point | 206 °F |
| Color | Clear |
| Form | Liquid |
| Water Solubility | Soluble in water. |
| Vapor Pressure | 0.05 mm Hg ( 20 °C) |
| Refractive Index | n 20/D 1.447(lit.) |
| pH | 6 (50g/l, H2O, 20℃) |
| Log P | 0.97 at 20℃ |
Safety & Handling
Warning GHS07 Hazard Statements H317 May cause an allergic skin reaction H319 Causes serious eye irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P280 Wear protective gloves/protective clothing/eye protection/face protection. P321 Specific treatment (see … on this label). P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29161490 |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 27813-02-1
- EC Number
- 248-666-3
- Mol. Weight
- 144.17
- HS Code
- 29161490
- Category
- Alcohols & Glycols