Sinomer® 4-HBA is a high-crosslinking, monofunctional acrylate monomer. It contains both a double bond and a hydroxyl group within a long acrylic chain, giving it dual functionality. This monomer is characterized by its fast cure speed, low odor, low skin irritation, and excellent weatherability. Its homopolymer has a very low glass transition temperature (Tg) of -65°C, which imparts exceptional flexibility, scratch resistance, and acid rain resistance to cured coatings and films. It is also water-soluble, making it suitable for waterborne UV systems.
SINOMER® 4-HBA
(High-crosslinking, monofunctional acrylate monomer)
化学名称： 4-Hydroxybutyl acrylate
CAS 登录号：2478-10-6
MF:C7H12O3 MW：144.17
Molecular structure：
Sinomer® 4-HBA is a high-crosslinking, monofunctional acrylate monomer. It contains both a double bond and a hydroxyl group within a long acrylic chain, giving it dual functionality. This monomer is characterized by its fast cure speed, low odor, low skin irritation, and excellent weatherability. Its homopolymer has a very low glass transition temperature (Tg) of -65°C, which imparts exceptional flexibility, scratch resistance, and acid rain resistance to cured coatings and films. It is also water-soluble, making it suitable for waterborne UV systems.
| 检验项目 (Item) | 指标要求 (Specification) |
| 外观 (Appearance) | 澄清透明液体 |
| 色度 (APHA) | ≤ 20 |
| 酸值 (Acid Value) | ≤ 1.0 mg KOH/g |
| Viscosity @ 25°C | 6 - 12 cps |
| 水分 (Water Content) | ≤ 0.2 % |
| 折射率 (Refractive Index) | 1.452 |
| Surface Tension @ 20°C | 28.9 Dynes/cm |
| Glass Transition Temperature (Tg) | -65 °C |
Dual Functional Groups: Contains a polymerizable double bond and a reactive hydroxyl group in a single molecule.
Excellent Flexibility: Very low homopolymer Tg (-65°C) significantly enhances the flexibility of cured polymers.
Fast Cure Speed & High Reactivity: The free hydroxyl group improves low-temperature curability.
Enhanced Material Properties: Improves scratch resistance, adhesion, and resistance to acid rain.
Low Irritation & Odor: Safer and more pleasant for handling and use in various applications.
Water Solubility: Can be used as a reactive diluent in waterborne UV coatings.
Good Weatherability: Provides long-term durability against environmental factors.
Synthetic Chemical Intermediates
Synthetic Resins
Wood Coatings
Plastic Coatings
Clear Overcoat Varnishes
UV-curable Adhesives (improves adhesion strength and durability)
Waterborne UV Coatings
● 25kg,200kgs/drum.
存放在干燥、阴凉、通风良好的库房内。
避免受光照和高温加热。
运输过程中做好防漏、防雨与防暴晒保护。
