Tags: acetone
What should I do if Cyanoacrylate gets stuck to my skin?
Link: http://adteputek.com/b2evolution/blog2.php/2009/06/20/what-should-i-do-if-cyanoacrylate-gets-s
Because the bond between the cyanoacrlate and the skin is created so quickly, rushing to pull skin apart "before it bonds" is pointless. Just remain calm and take your time. Cyanoacrylate adhesives are rapid curing, strong bonding agents which will bond human tissue and skin in seconds. Experience has shown that accidents due to cyanoacrylates are handled best by passive, non-surgical first aid. Cyanoacrylates work best with tension. Pulling bonded materials apart (fingers included) will strengthen the bond. Cyanoacrylates have the lowest strength in a peel mode. Acetone a Debonder will also release the cured adhesive.Treatment of specific types of accidents are given below. With the Skin: Immerse bonded areas in warm soapy water. Peel or roll skin apart. Peel the skin apart with a spatula, teaspoon handle or a pencil by pushing it between the bonded areas. Remove cured adhesive with warm, soapy water. This may take several applications. Acetone or a Debonder is also effective in removing cured cyanoacrylate off of skin. With the eyelid:If the eyelids are stuck together or bonded to the eyeball wash them thoroughly with warm water and apply a gauze patch. The eye will open without further action within 1-4 days. There will be no residual damage. Do not try to force eyes open. With the Eyeball: Cyanoacrylates adhesives will attach itself to the eye protein and will disassociate from it over time, usually within several hours. This will cause periods of weeping and double vision until cured adhesive is cleared. With the mouth: If lips are accidentally stuck together, apply copious amounts of warm water and encourage maximum wetting and pressure from saliva inside the mouth. Peel or roll, (do not pull) lips apart. It is almost impossible to swallow cyanoacrylate. The adhesive solidifies upon contact with saliva (moisture) and could adhere to the inside of the mouth. Saliva will lift the adhesive in 1-2 days, avoid swallowing the adhesive after detachment.Cyanoacrylate gives off heat, exothermic reaction, when curing. In rare cases a large quantity can cause a burn. Burns should be treated normally after the cured adhesive is removed from the skin as described above. It should never be necessary to surgically remove cyanoacrylate or to separate bonded skin.What are the four types of condensation curing systems of RTV Silicones?
Link: http://adteputek.com/b2evolution/blog2.php/2009-06-07-what-are-the-four-types-of-co
Different condensation curing systems are named according to the leaving group of the crosslinker that is used in their formulation. Therefore acetoxy-cure mechanisms give off acetic acid, alkoxy-cure mechanisms give off alcohols and oxime-cure mechanisms give off dimethyl ketoxime (DMKO). With these condensation by-products lies the source of a number of problems for silicones. Acetic acid is corrosive and therefore acetoxy-cure systems are unsuitable for chemically sensitive applications such as electronics. DMKO is less corrosive but can cause damage if trapped in close vicinity to sensitive components, for example if an oxime-cure silicone is applied as an encapsulant. DMKO also has toxicity issues, which limits its acceptability for many customers. Alcohol-cure adhesives avoid these problems by producing relatively-benign ethanol as their by-product, but react slowly and are less temperature-stable of an adhesive than acetoxy-cure mechanisms.The fourth type of condensation cure system is Acetone but is more expensive but worthwhile only if around sensitive components.Why Flurosilicone Rubber instead of Silicone Rubber?
Link: http://adteputek.com/b2evolution/blog2.php/2009/05/04/2009-05-04-why-flurosilicone-rubber-inst
Fluorosilicone sheeting is designed to be used in applications where normal silicone would degrade by harsh chemicals or fluids and is used where extreme conditions exist. This material will perform within a temperature range of -65°F to +500°F (like silicone rubber). Fluorosilicone is extremely resistant to fuels and solvents, and naturally resistant to ozone. The higher the number, the better chemical resistance of flurosilicone with the chemical. 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06/20/09 11:15:29 am, 