Functional Monomers

2-Propenoic Acid (Acrylic Acid)

2-Propenoic acid, commonly known as Acrylic Acid (CAS No. 79-10-7), is a vital organic building block and the simplest unsaturated carboxylic acid. This colorless, pungent liquid is characterized by its high reactivity due to the presence of both a vinyl group and a carboxylic acid terminus. As a cornerstone of the modern petrochemical industry, it serves as a primary monomer for the synthesis of a wide array of homopolymers and copolymers. Its unique chemical architecture allows for rapid polymerization, making it indispensable in the production of superabsorbent resins, adhesives, and surface coatings. It is typically produced via the catalytic oxidation of propylene. Acrylic Acid’s ability to undergo addition reactions at the double bond and esterification at the carboxyl group provides unparalleled versatility. Consequently, it maintains a dominant market role in the formulation of plastics, paper treatments, and specialty chemicals, driving innovation across various industrial sectors globally.

Attributes

Key Features and Benefits

High Reactivity: The alpha, beta-unsaturated structure enables rapid radical polymerization.
Exceptional Purity: Industrial grades typically offer >99.5% purity for consistent polymer chain growth.
Superior Adhesion: Enhances bonding in paint and coating formulations.
Versatile Functionalization: Dual-functional groups allow for various chemical modifications including esterification.
Water Solubility: Completely miscible with water, facilitating aqueous-based processing.
Controlled Stability: Stabilized with inhibitors like Hydroquinone Monomethyl Ether (MEHQ) to ensure safe storage and transport.
Enhanced Durability: Contributes to UV resistance and weathering performance in finished resin products.

Specifications

Technical Highlights

Appearance: Clear, colorless, mobile liquid with a characteristic acrid odor.
Boiling Point: Approximately 141 degrees Celsius at atmospheric pressure.
Melting Point: 13 degrees Celsius; requires storage above 15 degrees Celsius to prevent crystallization and subsequent risk of inhibitor depletion.
Flash Point: 54 degrees Celsius (Closed Cup).
Solubility: Fully miscible in water, alcohols, and common organic solvents.
Chemical Stability: Highly prone to exothermic polymerization if uninhibited or overheated.
Handling Guidelines: Corrosive to metals and skin; requires rigorous PPE and stainless steel or glass-lined storage containers to maintain product integrity and safety.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Superabsorbent Polymers (SAP): Major component in personal hygiene products such as diapers and adult incontinence pads.
Surface Coatings: Used in architectural paints, wood finishes, and industrial coatings for improved weatherability.
Adhesives and Sealants: Key monomer for pressure-sensitive adhesives and construction sealants.
Water Treatment: Precursor for polyacrylic acid used as a scale inhibitor and dispersant in industrial cooling systems.
Textiles: Applied in fiber finishing and non-woven fabric binders to enhance structural integrity.
Detergents: Employed as a co-builder to prevent soil redeposition during laundering.
Specialty Chemicals: Intermediate for acrylic esters and cross-linking agents.