Is neutral-pH structural adhesive better or acidic-pH structural adhesive?
1、Structural adhesives are materials used to bond and seal various glass types with other substrates. They are primarily divided into two main categories: silicone adhesives and polyurethane adhesives. Silicone adhesives are further divided into acidic and neutral types, with neutral adhesives including stone sealing adhesives, anti-mold adhesives, fire-resistant adhesives, and pipe sealing adhesives.
2、Neutral and acidic structural adhesives each have their own advantages. Neutral structural adhesives are suitable for a variety of materials and can be used for bonding plastics, metals, etc., but their bonding strength is not as good as that of acidic adhesives. Acidic adhesives can corrode copper and cannot be used for bonding metals.
What are the differences between acidic and neutral structural adhesives?
1Price
From a price perspective, acidic structural adhesives are less expensive than neutral structural adhesives.
2Appearance
From the appearance, the structural adhesives do not show significant differences. However, the concentration of the neutral structural adhesive is slightly higher.
3- Odor
From a scent perspective, neutral construction adhesives generally have no odor, while acidic construction adhesives have a distinct odor, similar to vinegar.
4- Corrosive
Acid-based structural adhesives exhibit slight corrosion (acid erosion) towards certain bonded materials and generate significant air pollution. Neutral structural adhesives do not exhibit any corrosion and generate minimal pollution.
5- Drying time
From a drying time perspective, neutral structural adhesive dries faster than acidic structural adhesive.
6、Usage features
From a functional perspective, neutral structural adhesives are widely used and non-irritating. Acidic structural adhesives are intended for specific applications due to their corrosive nature during the drying process, and are not suitable for use on metal or surfaces coated with products like Hua Gong Coatings.