5 сентября, 2015 
Malyar Like most adhesive types, acrylic adhesives do not have an indefinite shelf life after manufacture. Typically suppliers of acrylic adhesives list shelf lives of at least three months, with some as long as a year.
One difference with acrylic adhesives is the fact that they do often contain large amounts of highly reactive substances (monomers) that are used to achieve some of the unique properties associated with this family of products. In some cases, certain monomers may have a tendency to autopolymerize (cure without the use of externally added accelerators or hardeners). Consequently, shelf stability with some systems can be a problem at relatively low temperatures. Even at as low as 44°C some acrylic formulations will begin to cure and harden in as little as a few weeks if maintained at these temperatures. Large containers [above 5 gallons (ca. 19 L)] can worsen this problem.
This problem with shelf stability above 44°C is largely historic in nature since recently introduced products have much improved stability over early prototypes. Users of these products should, however, consult with suppliers to confirm recommended storage conditions.
Опубликовано в рубрике 