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Cyanoacrylates

Cyanoacrylates are a type of one-component adhesive suitable for various industrial applications where speed and strength are necessary. This adhesive was discovered by accident in the laboratory when parts containing it could not be separated. It is commonly known as "crazy glue” or “super glue.” It is also known as the instant adhesive because of its ability to set and achieve a high level of bond strength quickly. Cyanoacrylates have been modified and improved for industrial usage and a broad selection of materials with specialized properties is now available for many different applications.
USING CYANOACRYLATE ADHESIVES

SURFACE PREPARATION

To ensure a strong, lasting bond, the surface must be clean and free from rust inhibitors, mold release agents, grease and oil. Bond strength on painted parts is limited by how well the paint adheres to the substrates.

ADHESIVE APPLICATION

Optimum results with cyanoacrylates are obtained with the minimum quantity of adhesive needed to fill the joint. In general, one free-falling drop spreads over one square inch. Apply firm hand pressure to mated surfaces until the adhesive sets. The thinner the bond line, the quicker the set and the stronger the bond.

BOND DURABILITY

Durability is affected by surface conditions, bond area, service temperature, environment and stress. Each application must be evaluated individually. Moisture and temperature resistance are dependent on the substrates bonded and the particular cyanoacrylate used. There are many different grades of this adhesive available tailored for each special application.

ACCELERATORS

When bonding dissimilar materials or when the surface contains an acidic residue, a slow or inhibited cure may result. This condition is most effectively corrected with the use of an accelerator. The accelerator will cause the adhesive to cure instantaneously.

STORAGE AND SHELF LIFE

Cyanoacrylates should be stored in the original containers in a cool, dry location at a temperature below 80 F. The usable shelf life of the adhesive is approximately six months. This expected useful life may be extended by refrigeration storage at 40 F. Material in use should be stored at room temperature and the container should be tightly sealed at all times when not in use as this adhesive reacts to moisture in the air. When removing products from refrigeration, allow the adhesive to reach room temperature prior to opening the container. Do not refrigerate containers that have been opened.

HANDLING PRECAUTIONS

Cyanoacrylates adhesives have been used in industry for many years and have an excellent safety record. Cyanoacrylates are non-toxic. The vapors can cause eye irritation in poorly ventilated areas or low humidity environments. They do need to be handled with caution however, as they can bond skin in seconds. Accidental skin bonding is best handled by passive, non-surgical first aid. Hot soapy water aids separation of skin tissue. Use peeling, not pulling action to separate bonded tissue. In case of eye contact, eye should be washed with copious quantities of water. When large quantities of cyanoacrylates are accidentally spilled, the area should be flooded with water which will cause the liquid to cure. The material can then be scraped from the surface. NOTE: The liquid adhesive should not be wiped up with rags or tissue. The fabric will cause polymerization and large quantities of adhesive will generate heat on cure causing smoke and strong irritating vapors. Always flood with excess water to clean up spill conditions.

LIMITATIONS

Cyanoacrylates do not act as void-filling adhesives and are limited to gaps under .020 inch unless an accelerator is used. Strong bonds are initially formed on glass, ceramics and stone, but will often rapidly decrease in strength. Cyanoacrylates are not recommended for high moisture or submerged applications or situations requiring high shock resistance.

WARNING! !

EYE IRRITANT - BONDS SKIN IN SECONDS Do not get adhesive on your skin or other part of your body, or that of others. In case of body contact, flush with water. Get medical attention for eye or internal contact. To avoid skin contact, use the applicator nozzle when provided. Wear gloves when possible. Use with adequate ventilation. KEEP AWAY FROM CHILDREN.

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