Butyl acrylate (C7H12O2) is a chemical compound used in the production of adhesives, coatings, and polymers. It exhibits excellent film-forming properties and enhances the durability of various products.
| IUPAC Name | Butyl acrylate |
| Molecular Formula | C7H12O2 |
| CAS Number | 141-32-2 |
| Synonyms | Butyl propenoate, 2-Propenoic acid butyl ester, UN 2348 |
| InChI | InChI=1S/C7H12O2/c1-3-4-5-6-9-7(2)8/h3-6H2,1-2H3 |
Butyl Acrylate Properties
Butyl Acrylate Formula
The formula of butyl acrylate is C7H12O2. It consists of seven carbon atoms, twelve hydrogen atoms, and two oxygen atoms. The formula represents the specific arrangement and composition of atoms in a molecule of butyl acrylate.
Butyl Acrylate Molar Mass
The molar mass of C7H12O2 is calculated to be approximately 128.17 g/mol. It is determined by adding the atomic masses of all the atoms present in one mole of C7H12O2. The molar mass provides important information for various chemical calculations and conversions.
Butyl Acrylate Boiling Point
C7H12O2 has a boiling point of approximately 145-147°C. This is the temperature at which the liquid form of C7H12O2 changes into a gas phase. The boiling point is influenced by intermolecular forces and the molecular structure of C7H12O2.
Butyl Acrylate Melting Point
The melting point of C7H12O2 is approximately -70°C. It is the temperature at which the solid form of C7H12O2 changes into a liquid state. The melting point is influenced by factors such as molecular structure, intermolecular forces, and the presence of impurities.
Butyl Acrylate Density g/mL
The density of C7H12O2 is about 0.902 g/mL. Density is a measure of the mass per unit volume of a substance. It indicates how tightly packed the molecules are in a given volume of C7H12O2. The density is influenced by factors such as temperature and pressure.
Butyl Acrylate Molecular Weight
The molecular weight of C7H12O2 is approximately 128.17 g/mol. It is the sum of the atomic weights of all the atoms in the molecule. The molecular weight provides valuable information for various chemical calculations and helps in determining the amount of C7H12O2 in a given sample.
Butyl Acrylate Structure
The structure of C7H12O2 consists of a butyl group (C4H9) attached to the ester functional group of acrylic acid. It can be represented as CH2=CHCOOC4H9. The structure reveals the arrangement and connectivity of atoms in C7H12O2.
Butyl Acrylate Solubility
C7H12O2 is miscible in organic solvents such as alcohols, ketones, and ethers. It exhibits limited solubility in water due to its hydrophobic nature. The solubility of C7H12O2 is influenced by factors like temperature, polarity, and the nature of the solvent.
| Appearance | Clear liquid |
| Specific Gravity | 0.902 g/mL |
| Color | Colorless |
| Odor | Characteristic odor |
| Molar Mass | 128.17 g/mol |
| Density | 0.902 g/mL |
| Melting Point | -70°C |
| Boiling Point | 145-147°C |
| Flash Point | 47°C |
| Water Solubility | Limited solubility |
| Solubility | Miscible in organics |
| Vapor Pressure | 10 mmHg |
| Vapor Density | 4.4 (air = 1) |
| pKa | 4.38 |
| pH | 5-7 |
Butyl Acrylate Safety and Hazards
C7H12O2 presents certain safety considerations and hazards. It is flammable and can form explosive mixtures with air. It should be handled with caution and kept away from open flames or sparks. Direct contact with C7H12O2 can cause skin and eye irritation. Prolonged or repeated exposure may lead to sensitization or allergic reactions. Adequate ventilation should be ensured when working with this compound to prevent the buildup of vapors. It is important to use personal protective equipment such as gloves, goggles, and a lab coat. In case of ingestion or inhalation, immediate medical attention should be sought.
| Hazard Symbols | Flammable (F) |
| Safety Description | Keep away from heat/sparks/open flames. |
| Avoid contact with skin and eyes. | |
| Use in a well-ventilated area. | |
| UN IDs | UN 2348 |
| HS Code | 29161200 |
| Hazard Class | 3 (Flammable liquid) |
| Packing Group | II (Medium danger) |
| Toxicity | May cause skin and eye irritation. Prolonged exposure may lead to sensitization. Inhalation or ingestion can be harmful. |
Butyl Acrylate Synthesis Methods
Various methods allow for the synthesis of C7H12O2.
One common approach involves the esterification of acrylic acid with butanol. During this process, a catalyst, usually sulfuric acid, facilitates the combination of acrylic acid and butanol. The reaction takes place at an elevated temperature and is accompanied by water removal to drive the equilibrium toward the formation of C7H12O2.
Another method involves the esterification of acrylic acid with butanol using an acid-activated clay catalyst. The reaction conditions are similar to the previous method, with the clay catalyst promoting the esterification reaction.
The transesterification of methyl acrylate with n-butanol enables the production of C7H12O2. Alkaline agents, such as sodium methoxide or sodium hydroxide, typically catalyze this reaction. The transesterification process allows for the conversion of the ester group from methyl acrylate to n-C7H12O2.
In the direct esterification process, one can prepare C7H12O2 by reacting acrylic acid with butene in the presence of a catalyst such as phosphoric acid or ion exchange resin. This process enables the direct conversion of acrylic acid and butene into C7H12O2.
Butyl Acrylate Uses
C7H12O2 finds numerous applications across various industries due to its versatile properties. Here are some of its uses:
- Adhesive Production: C7H12O2 is a key component in the manufacture of adhesives, providing excellent bonding strength for various materials such as plastics, metals, and textiles.
- Coatings and Paints: In the production of coatings and paints, it actively enhances the durability, adhesion, and weather resistance of the final products, making it widely used.
- Polymer Production: C7H12O2 serves as a monomer utilized in the manufacturing of polymers like polyC7H12O2, which demonstrate flexibility, impact resistance, and excellent thermal stability.
- Textile Industry: The textile industry uses it as a softener and modifier for fabrics, as it enhances their feel, durability, and resistance to wrinkling.
- Paper Coatings: The production of paper coatings utilizes C7H12O2 to enhance the printability, smoothness, and water resistance of paper surfaces.
- Emulsion Polymerization: It serves as a primary monomer in emulsion polymerization processes, leading to the production of latexes used in various applications, including paints, adhesives, and textile coatings.
- Industrial Sealants: The formulation of industrial sealants utilizes C7H12O2 to deliver strong and reliable sealing properties in applications including construction, automotive, and electronics.
- Textile Printing: Textile printing inks employ C7H12O2 to enhance color adhesion, wash fastness, and resistance to fading.
- Leather Finishing: In leather finishing, C7H12O2 improves the softness, elasticity, and water-repellency of leather products.
- Plastic Additives: It serves as a comonomer in the production of various plastic materials, imparting flexibility and impact resistance to the final products.
These applications highlight the wide range of uses for C7H12O2 in industries such as adhesives, coatings, polymers, textiles, and more.
Questions:
Q: Does poly(butyl acrylate) show crystallization and melting temperature?
A: Poly(butyl acrylate) exhibits limited crystallization and has a relatively low glass transition temperature, but it does not have a distinct melting point.
Q: Is butyl acrylate toxic?
A: C7H12O2 is considered to have low acute toxicity, but it can cause skin and eye irritation upon direct contact. Prolonged or repeated exposure may lead to sensitization.
Q: Can you buy butyl acrylate?
A: Yes, C7H12O2 is commercially available for purchase from chemical suppliers and distributors.
Q: What is butyl acrylate?
A: C7H12O2 is a chemical compound used in the production of adhesives, coatings, polymers, and various other applications. It is an ester derived from acrylic acid.
Q: Is AIBN soluble in butyl acrylate?
A: Yes, AIBN (azobisisobutyronitrile) is soluble in C7H12O2, making it suitable for initiating polymerization reactions involving C7H12O2.
Q: Are ethyl acetate, butyl acetate, and acrylates copolymer, like nitrocellulose?
A: No, ethyl acetate, butyl acetate, and acrylates copolymer are different chemical compounds with distinct properties and uses compared to nitrocellulose.
Q: What is a common use of butyl acrylate?
A: A common use of C7H12O2 is in the production of adhesives, where it provides strong bonding properties for various materials.