What Is an Adhesion Promoter?
An adhesion promoter is an accelerator that maximizes adhesion when applied as a pretreatment for sealants and adhesives.
Instant adhesives require a long time to cure when used in large quantities, potentially leading to whitening.
Uses of Adhesion Promoters
Adhesion promoters are used in the industrial field for bonding and repairing parts.
They are used to completely cure adhesives, shorten curing time, bond porous materials, and suppress whitening when used in large quantities for filling or heaping. They also have a cleansing effect, as they remove water and oil after the dirt is removed as a pretreatment.
Since thick application can reduce adhesion, adhesion promoters should be applied thinly and evenly by spraying, using a cloth or brush, or soaking in the liquid.
Principle of Adhesion Promoters
The main ingredients of adhesion promoters have different characteristics in terms of erosiveness and curing time.
They may be cyclopentane-based, acetone-based, or alcohol-based.
Acetone is the best in terms of curing speed and preventing whitening, but it has a strong odor and erosive properties that reduce the strength of the plastic, so a slight load may cause cracking or breakage.
Cyclopentane-based products are second in both curing speed and preventing whitening, and are easier to handle because they are less aggressive and less smelly than acetone.
Alcohol-based products have the longest curing time and are less effective in preventing whitening, but they are superior in that they can be used on plastic materials because they are not affected by erosion.