USES OF ACRYLIC ADHESIVE

Worldwide use and sales for acrylic adhesives of the types discussed here are difficult to determine, particularly since so many of the chemistries involved are nowadays hybrids of more than one type. Acrylics would, no doubt, not be considered the major chemical family of adhesives, when compared to epoxies and urethanes. Nevertheless, due to the need for the unique handling characteristics and performance properties achievable with acrylics, they maintain and will continue to maintain an important position among high performance structural adhesive types.

Acrylic adhesives’ distinct ability to bond quickly to a variety of unprepared metals has meant that they are a significant factor in bonding certain electrical components, such as magnets for fractional horsepower motors. Acrylics have also been found to be the most effective way to bond aluminum, where fast room temperature bonding to unprepared aluminum is required. Their unique adhesion to aluminum has translated into their use in bonding aluminum for construction (windows and doors), recreation (boats), and military (repair and primary bonding) applications. They also offer poten­tial in the automotive area where bonding metals used in primary structures is becoming a possibility. The use of acrylics for metal exterior structures has also been an area of active investigation.

Acrylics offer some unique capabilities to bond to plastics without surface priming. They are also very good gap filling materials which makes their use preferable to solvent welding in many cases. The markets served include the recreational and industrial areas. Uses in the area of plastic appliances and other plastic molded devices are also known to exist.

In the future the various families of acrylic adhesives are expected to grow as more and more design engineers specify bonded parts and as specialty substrates continue to emerge that are bondable only with acrylic adhesives. The development of formulations with lower overall odor, 1-part systems, and hybrid types will also have a positive effect on overall growth.

II. SUMMARY

Curing acrylic adhesives were introduced decades ago and have been a class of adhesive materials that have continued to be improved since their introduction. Significant advances have occurred in making these materials tougher, faster curing, more resistant to aggressive environments, and easier to handle. Current versions will no doubt be replaced by even more improved variants as this technology continues to be a rich area for research.

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