Patents with Abstracts
“Cyanoacrylate is the generic name for a family of fast-acting adhesives with industrial, medical and household uses. They include methyl 2-cyanoacrylate, ethyl-2-cyanoacrylate (commonly sold under trade names like "Super Glue" and "Krazy Glue"), and n-butyl cyanoacrylate (used in veterinary and skin glues). The related compound 2-octyl cyanoacrylate is a medical grade glue; it was developed to be non-toxic and less irritating to skin tissue. Cyanoacrylate adhesives are sometimes known as instant glues. The abbreviation "CA" is commonly used for industrial grades.
The original cyanoacrylates (the chemical name for the glue) were discovered in 1942 in a search for materials to make clear plastic gun sights for the war, when a team of scientists headed by Harry Wesley Jr stumbled upon a formulation that stuck to everything that it came in contact with. However, cyanoacrylates were quickly rejected by the American researchers precisely because they stuck to everything. In 1951, cyanoacrylates were rediscovered by Eastman Kodak researchers Harry Coover and Fred Joyner, who recognized their true commercial potential, and it was first sold as a commercial product "Eastman #910" (later "Eastman 910") in 1958.
During the 1960s, Eastman Kodak sold cyanoacrylate raw feedstock to Loctite, which in turn repackaged and distributed it under a different brand name "Loctite Quick Set 404." In 1971, Loctite developed its own manufacturing technology and introduced its own line of cyanoacrylate, called "Super Bonder". Loctite quickly gained market share, and by late 1970s it was believed to have exceeded Eastman Kodak's share in the North American industrial cyanoacrylate market. Other manufacturers of cyanoacrylate included Permabond Division of National Starch and Chemical, Inc., which was a subsidiary of Unilever. Together, Loctite, Eastman and Permabond accounted for approximately 75% of the industrial cyanoacrylate market.”
(Wikipedia, Cyanoacrylate Adhesives, 6/19/2012)
“Cyanoacrylate compositions are well known as one component reactive adhesives, which are quick bonding and suitable for applications on variety of substrates.
Because cyanoacrylate compositions are inherently of a low viscosity, some applications, such as those where a substrate having large pores is used, are cumbersome. For that reason, thickened cyanoacrylate compositions were developed. Reported thickeners include acrylate resins, such as poly(methyl(meth)acrylate), polymeric alkylcyanoacrylates, cellulose esters, such as cellulose acetate and cellulose butyrate, and polyvinyl ethers, such as polyvinylmethyl ether. See U.S. Pat. No. 3,742,018. “
[Misiak, Barnes and, US Patent 8,192,731 (6/5/2012)]
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Roger D. Corneliussen
Maro Polymer Links
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Copyright 2012 by Roger D. Corneliussen.
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* Date of latest addition; date of first entry is 6/19/2012.