Lupasol® PR 8515

Lupasol® PR 8515 is an anhydrous, low molecular weight, polyethylenimine that is used as an adhesion promoter and crosslinker in coatings and adhesives.
Product Overview
Lupasol® PR 8515, is a water-free multi-functional cationic polyethyleneimine (PEI) with a branched polymer structure. Lupasol® PR 8515 has a low molecular weight and can be added to water-based coatings, inks, and adhesive formulations without a significant effect on viscosity. Due to the high cationic charge density, Lupasol® PR 8515 is highly effective at crosslinking negatively charged polymers, increasing adhesion, flocculating anionic contaminants, and dispersing cationic pigments. Lupasol® PR 8515 is available commercially as a viscous, 50% solids, aqueous solution in 55 gallon drums. It can be easily diluted with water and most polar solvents to your specific working concentration.
Product Specifications
Avg molar mass: 2,000
Viscosity: 14,000
Concentration: 98%
Color: clear, colorless to rarely slightly yellowish liquid
Primary Chemistry: Polyethylenimine
Features & Benefits
Compatible with cationic and nonionic systems
Absorbs strongly on negatively charged surfaces
Crosslinking agent
Miscible with water in all proportions
Flowable liquids
Ames negative
No detectable ethylenimine importunity
Three types of bonding: ionic, hydrogen and van der Waals Forces
Superior adhesion to metal surfaces
Excellent adhesion promoters
Fixing agent in hair treatment products
FDA 175.105 approved for lamination or sealing of food packaging items
Problems Solved
Low cross-link density of sealants, adhesives, paints, coatings, and inks.
When added to coatings, inks, and adhesives Lupasol® PR 8515 improves adhesion of the formulation to challenging substrates like plastics, paper, and metal.

Lupasol® PR 8515 can be used as a crosslinker for polyurethane and epoxy systems to improve cure speed and increase overall durability of the cured film.