{"id":2901,"date":"2018-04-25T14:34:34","date_gmt":"2018-04-25T14:34:34","guid":{"rendered":"https:\/\/permabond.com\/ethyl-cyanoacrylate\/"},"modified":"2025-12-31T19:04:33","modified_gmt":"2025-12-31T19:04:33","slug":"ethyl-cyanoacrylate","status":"publish","type":"post","link":"https:\/\/permabond.com\/fr\/ethyl-cyanoacrylate\/","title":{"rendered":"Ethyl Cyanoacrylates"},"content":{"rendered":"

Ethyl Cyanoacrylates<\/h2>\n

\"ethyl<\/p>\n

One of the most common types of cyanoacrylates used as instant adhesives are ethyl cyanoacrylates.\u00a0 Years ago, they said to use methyl cyanoacrylates for metal and ethyl for everything else.\u00a0 That simple saying served me well for many years.\u00a0 Permabond 910 was the original methyl cyanoacrylate. It was formulated over 60 years ago and is still sourced to meet aerospace, automotive, and many other company-specific specifications.\u00a0 Permabond 101 followed not too long after that.\u00a0 Permabond 101 is an ethyl cyanoacrylate that forms strong bonds to most plastics.\u00a0 It too is still very active in aerospace, automotive, and other industry specifications.<\/p>\n

That begs the question, “if the 910 bonds metal and the 101 bonds virtually everything else, why do you keep formulating new grades?”\u00a0 There are currently so many grades of these types of cyanoacrylates and others, as well as blends of types and tougheners, etc., that we no longer categorize cyanoacrylates by their chemical type but by their properties.<\/p>\n

Toughened<\/h4>\n

Standard ethyl cyanoacrylates are brittle.\u00a0 Toughened ethyl cyanoacrylates are preferred if the assembly will need to withstand vibration, impact, or flexing stresses.\u00a0 Although these are ethyl based, they can have higher shear strength on steel than a standard methyl cyanoacrylate.\u00a0 Permabond 731<\/a> and 735<\/a> exhibit shear strength on steel to 4400 psi (30 MPa).\u00a0 Although these are marketed as toughened cyanoacrylates, they have some added benefits, namely slower set time and higher temperature resistance.<\/p>\n

Many desire cyanoacrylates or instant adhesives for their fast set time – often less than 5 seconds. In other applications requiring accurate alignment or a large bond area, the super-fast cure time can make processing difficult. Depending on the metal, gap, and humidity, Permabond 735 can take up to 50 seconds to cure on metal.\u00a0 Regarding temperature resistance, most cyanoacrylates have a lower service temperature limit of -65\u00b0F (-55\u00b0C), and the higher temperature limit varies as listed below:<\/p>\n