Ethyl Cyanoacrylate CAS 7085-85-0
Name:Ethyl Cyanoacrylate
CAS: 7085-85-0
Purity: 99%min
MOQ: 1KG
Chemical Structure
Basic Info:
| CAS No: | 7085-85-0 |
| Name: | Ethyl Cyanoacrylate |
| EINECS: | 230-391-5 |
| Formula: | C6H7NO2 |
| Weight: | 125.13 |
| Other Names: | ETHYL 2-CYANOACRYLATE |
| Type: | Organic raw materials |
| Shelf Life: | 1 years |
| Brand Name: | Look Chem |
| Place of Origin: | Shandong, China |
Product Introduction:
Ethyl cyanoacrylate (commonly abbreviated as ECA, CAS 7085-85-0) is a typical cyanoacrylate monomer raw material, which appears as a clear, colorless to slightly yellow liquid with a molecular formula of C₆H₇NO₂ and a molar mass of ~125.13 g/mol. Its most well-known application is as the core reactive monomer of the cyanoacrylate instant adhesives (often generally referred to as “Super Glue“), which can quickly form a high-strength adhesive layer at room temperature. Note: This article discusses both ECA as a raw monomer and its use in formulated instant adhesives. Unless otherwise specified, performance metrics (viscosity, blooming, heat resistance) refer to the finished adhesive product.
The key to its “fast adhesion” lies in the curing mechanism: cyanoacrylate will be triggered by trace amounts of moisture or basic species adsorbed on the surface of the substrate, triggering an anionic polymerization reaction and forming a polymer in a short period of time to complete the adhesion. For procurement and production, this means it can support shorter assembly cycles, less curing waiting time, and also puts higher requirements on packaging sealing, storage temperature and humidity, and on-site application practices.
The reason why ethyl cyanoacrylate can occupy the core position in the adhesive market is its high formulation versatility. By adjusting viscosity, adding toughening agents or stabilizers, it can be transformed from a general-purpose household adhesive to a high-precision industrial grade adhesive.
Nature and Specifications:
Specification
Product Nature
Specification
| Item | Specification |
| Product Name | Ethyl Cyanoacrylate |
| CAS No. | 7085-85-0 |
| Appearance | Powder |
| Shelf Life | 1 years |
| Packing | 1kg/bag,25kg/bag or as your requirements |
Product Nature
| Melting Point | -20 to -25 °C |
| Boiling Point | 54-56 °C (0.21-0.40 kPa) |
| Density | 1.04 |
| Vapor Pressure | 21 Pa at 20 °C |
| Refractive Index | nD₂₀ 1.4391 |
Product Packaging
Ethyl Cyanoacrylate Uses:
In the electronics industry, ethyl cyanoacrylate is an indispensable assembly material. Due to its excellent insulation performance and fast curing speed, it is widely used for bonding wire harnesses, fixing micro components on circuit boards, and assembling plastic enclosures or housings for portable devices. For example, in the manufacturing of speakers and headphones, ECA is used to bond the voice coil to the diaphragm, requiring the adhesive to cure in a very short time to adapt to high-speed automated production lines, and the cured adhesive layer must have sufficient rigidity to transmit sound vibrations.
The modern automotive industry pursues lightweight and extensively uses engineering plastics and rubber seals. Ethyl cyanoacrylate plays a key role here, mainly used for splicing rubber sealing strips, assembling car lights, and fixing interior parts. Due to the frequent exposure of cars to vibration and temperature changes, industrial grade ECA formulations are usually modified to improve their heat resistance and impact resistance, ensuring that the bonding points remain firm in complex road conditions.
Ethyl cyanoacrylate plays an important role in the production and assembly of disposable medical devices. Please note that this refers to the physical structure bonding of the device itself, such as the connection between the catheter and the connector, the fixation of the injection needle, and the assembly of the breathing mask. ECA can provide high-strength sealed connections, and due to its solvent-free nature (100% solids), it meets the high standard requirements of many medical device manufacturing (subject to ISO 10993 biocompatibility and E&L validation). It can firmly bond plastics such as polyvinyl chloride (PVC) and polycarbonate (PC), ensuring the structural integrity of the instrument during use. (Note: Medical adhesives used for closing human skin wounds are usually based on octyl or butyl cyanoacrylate, which have essential differences in flexibility and biodegradability from industrial/assembly ECA and cannot be mixed.)
This may be one of the most unexpected but fastest-growing markets for ethyl cyanoacrylate. In the nail art industry, it is the main component of adhesive to bond artificial nail tips. In the field of false eyelash adhesive, in order to pursue lower irritation, modified ECA formulas are usually used, or higher end alkoxyethyl cyanoacrylate is directly used. Compared to pure ECA, the latter usually reduces odor and blooming, though individual sensitivity varies.
As the basic raw material of the famous “Super Glue” or “instant adhesive”, ethyl cyanoacrylate is the absolute mainstay of the home repair and DIY market. In the field of industrial maintenance (MRO), it is used for on-site production of O-rings and emergency repair of mechanical parts. Its excellent adhesion to metal, leather, cork, and most plastics makes it a must-have item in toolboxes.
ECA, known as the “universal adhesive” for its wide substrate compatibility, lives up to its reputation. It bonds well to a wide range of substrates (including metals, glass, many plastics, and some rubbers). Even for materials such as polypropylene (PP) or polyethylene (PE) that are extremely difficult to bond, ECA can achieve high bond strength when used in conjunction with a specialized surface treatment agent primer.
ECA, known as the “universal adhesive” for its wide substrate compatibility, lives up to its reputation. It bonds well to a wide range of substrates (including metals, glass, many plastics, and some rubbers). Even for materials such as polypropylene (PP) or polyethylene (PE) that are extremely difficult to bond, ECA can achieve high bond strength when used in conjunction with a specialized surface treatment agent primer.
Excellent aesthetics. Ethyl cyanoacrylate is usually a transparent and colorless liquid that forms an extremely thin adhesive layer after curing, almost invisible. This is crucial for consumer electronics products, jewelry processing, and assembly of transparent plastic products that require extremely high appearance, as it does not damage the overall beauty of the product like some yellow or black structural adhesives.
Industry Q & A
A: Shelf life depends on formulation and packaging (refer to supplier TDS); however, refrigerated storage typically extends stability. Reason: ECA is a highly reactive monomer. High temperature will accelerate the thermal motion of its internal molecules, leading to slow self polymerization inside the bottle, manifested as increased viscosity or even complete solidification. Refrigeration can significantly inhibit this self reaction. But before use, it is necessary to allow the product to return to room temperature to avoid condensation of moisture in the air and mixing into the glue, which can affect its performance.
A: Blooming refers to the white powdery marks left around the joint after the glue has solidified. Reason: ECA monomers are volatile. The emitted monomer vapor encounters moisture, polymerizes, and settles on the surrounding area, forming white polymer dust. Solution:
Control dosage: Less is more (apply minimal amount). Excessive glue can slow down curing and increase evaporation time.
Strengthen ventilation: Increasing air flow can remove volatile monomers and prevent them from settling on the surface of the workpiece.
Choose a low whitening formula: When purchasing, you can inquire about the modified “low whitening/low odor” specifications. These products usually reduce blooming/odor by lowering vapor pressure (e.g., via higher-molecular-weight monomers) and/or adding anti-blooming ingredients.
A: This is a balance problem between reaction rate and structural density. The commonly recommended relative humidity environment for ethyl cyanoacrylate is 40% -60%(depending on formulation and process). If the humidity is too low (<30%), curing will be very slow; But if the humidity is too high (>80%), the surface glue will undergo “shock curing” due to rapid reaction, increasing shrinkage stress and potential defects (like bubbles). This may reduce the cohesive strength of the adhesive layer, causing the adhesive layer to become brittle.
A: Directly using pure ECA to bond these inert materials (low surface energy materials) has poor performance and almost no strength. Solution: It must be used in conjunction with a “Primer” for surface treatment. This treatment agent is first applied to the surface, dried, and then provided with reactive active sites for ECA by changing the surface chemical properties. When used with a primer, ECA can effectively bond silicone and polyolefins (PP/PE); however, PTFE usually requires aggressive etching or specialized surface treatment.
A: Viscosity directly determines the fluidity and sealing ability of the adhesive.
Low viscosity (like water, 2-10 CPS): Highly permeable, suitable for tight fitting parts with very flat surfaces and very small gaps<0.05mm. It uses capillary action to penetrate into the seam.
Medium viscosity (100-500 CPS): Universal type, suitable for most conventional assemblies, with certain anti-sag/slump resistance (depending on formulation).
High viscosity/gellike(>1500cps): suitable for work pieces with vertical surface (no flowing) or rough surface and large gap (e.g., ~0.1–0.2 mm, depending on conditions; consider activators for larger gaps). When purchasing, viscosity should be selected based on specific workpiece tolerances.
A: Forcible physical removal may damage the surface of the workpiece. Chemical debonding is a better choice.
Main solvents: Acetone (check plastic compatibility) can help soften cyanoacrylate. Soak the bonding area in a solvent, the adhesive layer will soften, and then it can be wiped off.
Specialized Debonder: There are also debonding agents specifically designed for cyanoacrylate on the market, usually based on components such as propylene carbonate, with lower volatility than acetone and safer to use.
Attention: Before using solvents, it is necessary to test whether they will corrode the plastic material of the workpiece itself.
A: The blockage is caused by the adhesive coming into contact with moisture and solidifying at the needle tip. Suggestion:
Use PP tips or low-surface-energy dispense components to prevent adhesive from adhering to the inner wall of the needle.
Install moisture-proof device: Install a desiccant filter in the air/N₂ supply line to ensure that the drive gas (or dispensing air pressure) is dry air or nitrogen.
Suck-back function: Ensure that the dispensing valve has a vacuum suck-back function to prevent residual glue from hanging on the needle tip and coming into contact with air.
Regular dispensing: If the production line is paused for a long time, the machine should be programmed to automatically dispense a drop of glue at regular intervals to purge the glue that may have started to thicken at the needle tip.
Related References:
Ethyl Cyanoacrylate Manufacturer & Supplier
As an experienced Ethyl Cyanoacrylate manufacturer and supplier, Look Chemical is committed to producing and selling high quality products.
We cooperate and trade with 6000+ factories around the world, and our high-quality products and excellent services make us enjoy a high reputation internationally.
As Ethyl Cyanoacrylate supplier, Look Chemical provides supply chain solutions to partners and customers in a wide range of industries. We offer competitive pricing and quality products.
If you have a demand for this product, please contact our company’s sales staff, we will provide you with a solution in the shortest time.
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I’m william, CEO of Look Chemical Co., Ltd. Welcome to visit our company. As China’s top Global Supply Specialist of chemicals, we have always been adhering to the principle of “service first, quality first, mutual benefit”, and we insist on Create value for customers and grow together with customers.
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