Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Polyethylene glycol dimethacrylate functional monomer (Aldrich)
A
Cellulose acetate butyrate (CAB 551-0.22, Eastman Chemical)
A
Dibutyl phthalate plasticizer (Eastman DBP, Eastman)
A
Fumed silica (Aerosil 200, Evonik)
A
Wetting agent - fluoroadditive (Zonyl MP1300, DuPont)
A
Low density polyethylene filler (Microthene FN51000, Equistar)
Typical Properties
Brookfield viscosity, 2.5 rpm, cps
Resulting Properties
The most important use of anaerobic adhesives is as liquid lock washers for screws and bolts, flange sealing, and retaining. Because of their strong penetrating ability, they can be applied either before or after assembly. These resins have also been used as sealants to seal porosity in metal castings.
Certain anaerobic adhesives can withstand continuous aging at 230°C. However, their general service temperature limit is 150°C. They have good resistance to moisture and solvents, and salt spray resistance is excellent.
In the Anaerobic Acrylic Adhesive (B) formulation, fumed silica and cellulose acetate butyrate is used to produce unique rheology (thixotropy).
The source of this formulation is Eastman.