How Cyanoacrylate Adhesives Have Improved
- Posted by: Albert Puig
- Category: Permabond
There are various reasons why cyanoacrylate adhesives have grown in popularity despite their relatively higher cost per unit.
- First, cyanoacrylate adhesives are one-compound adhesives, so they are ready to use.
- They cure and bond very quickly when applied or pressed into a thin layer between two substrates, and they create a strong bond between different surfaces.
- Additionally, they can be applied easily with manual or automatic equipment.
- While early generations of cyanoacrylate adhesives had limitations, improvement has been dramatic, partly via the development of new monomers.
- Light-curing cyanoacrylate adhesives have been developed in recent times which can cure within three seconds.
- Similarly, while earlier cyanoacrylate adhesives tended to have poor heat and moisture resistance, newer cyanoacrylate adhesives have better toughness and shear strength.
- They also have faster cures, and improved thermal and impact resistance.
- With the addition of plasticizers such as phthalates, aliphatic esters and aromatic phosphates, peel strength and shock resistance have also been improved.
- Elastomeric tougheners such as acrylonitrile-butadiene-styrene, ethylene-methyl acrylate and other copolymers have also been used to boost the strength of new cyanoacrylate adhesives.
Permabond Industrial cyanoacrylate adhesives vs. general cyanoacrylates.
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What is the difference between industrial cyanoacrylates and instant adhesives that you sometimes find in a non-specialized store? Why do high speed production lines tend not to use “nameless” cyanoacrylates and save money?
The short answer is high purity and variety of formulations.
A high-quality industrial cyanoacrylate is required to ensure a constant curing rate and adhesion strength – this is essential in a fast moving production line to ensure that production is kept running smoothly with a minimum failure rate and supposedly, no customer complaints! A lower quality cyanoacrylate with a performance variable can cost a lot to the production line and to the reputation of the company.
The majority of cyanoacrylate sold in the retail trade is basic ethyl cyanoacrylate.
The main difference between anonymous ethyl cyanoacrylates and industrial cyanoacrylates is the quality management system behind the products.
For anonymous brands, curing speed requirements or resistances are usually very low or just non-existent. This is not an issue if you are repairing something at home – if it takes 3 seconds for 3 minutes to cure, it is not important, but it can be a big problem on a production line.
Many years ago the adhesive training manual indicated on the base “Methyl” cyanoacrylates for the metal and the base “Ethyl” for all the rest. “This is easy only if one type of ethyl or if advances in ethyl formulations do not adhere so well in metals.
At present, ethyl cyanoacrylates, including special formulations, form strong bonding bonds in a wide variety of materials.
Permabond 792, Ethyl based, general purpose, solvent free, very fast polymerization, minimized fogging level, good adhesion to wood, chrome, plastics, metals, ceramics and elastomers, approved CID AA-3097 Type II Class 2 and MIL-A-46050C Type II Class. Ideal for high speed production lines.
The additional benefits of some of the special formulations are as follows:
- Hardened styling, provide greater impact resistance.
- Flexible styles, provide better peel strength and can help keep substrate bonding flexible.
- Modified styles, get resistance to high temperatures.
- Low-odour and fogging styles, get a nice aesthetic finish and no white residue.
- Styles for acid and porous surfaces.
Permabond as a manufacturer of industrial grade cyanoacrylates offers a wide range of products suitable to the specific requirements of the production lines, offering solutions with better performance, finish and durability than a general cyanoacrylate.
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