Hydroxypropyl acrylate

Application Fields

Based on the characteristics of "moderate reactivity + moderate hydrophobicity," HPA is more suitable for scenarios requiring high water resistance and controllable crosslinking:

Coatings and Paints:

Solvent-based coatings: Copolymerized with butyl acrylate, hydroxyl groups participate in amino resin crosslinking to prepare automotive topcoats. Salt spray resistance (ASTM B117) reaches 1000 hours (superior to the 800 hours of the HEA system), and gloss retention is > 90% (QUV aging 500 hours).

Wood coatings: Reacts with polyurethane prepolymers as a crosslinking monomer. Due to strong hydrophobicity, the coating is resistant to boiling water immersion (no whitening after 2 hours), making it suitable for bathroom furniture finishing.

Adhesives and Sealants:

Hot melt adhesives: Modifies EVA resin; hydroxyl groups improve adhesion to polar substrates (such as PET film). Peel strength reaches 8 N/25mm (a 40% increase over unmodified), and heat resistance (softening point > 80℃) is superior to HEA-modified systems.

Photovoltaic encapsulant films: Copolymerized with ethylene-vinyl acetate (EVA); hydroxyl groups are introduced to enhance hydrogen bonding with glass. Interlayer peel strength is > 60 N/cm, meeting the 25-year service life requirement of photovoltaic modules.

Polymer Modification:

Water-based emulsions: Copolymerized with styrene and ethyl acrylate to prepare architectural emulsions. Hydroxyl crosslinking gives the coating film a scrub resistance of 5000 cycles (GB/T 9266). Due to strong hydrophobicity, low-temperature film-forming properties (minimum film-forming temperature < 5℃) are superior to the HEA system.

Elastomers: Modifies chloroprene rubber; hydroxyl groups react with hydroxyl groups on metal surfaces, improving the shear strength of rubber-to-steel bonding (>8 MPa), used in automotive vibration damping components.

Other Fields:

Oilfield chemicals: Used as a monomer for drilling fluid fluid-loss additives; copolymerized with acrylamide. Hydroxyl groups enhance adsorption to clay, reducing fluid loss to below 5 mL (API standard).

3D printing resins: Used with photoinitiators; due to the moderate polymerization rate of the double bond (curing time 1-2 seconds), printing precision (±0.1 mm) is superior to HEA, used for preparing water-resistant models (such as underwater sensor housings).