Talking about the UV-curing acrylic polyurethane resin coating

One way to solvent contamination and flammability problems is to replace thermoplastic acrylic coatings with photo-cured resin coatings, for example: on the surface of PVC agricultural films containing UV absorbers, apply UV cured resin coatings with cation polymerization (commonly used cation polymerized UV curing resins are epoxy resins and UV-cured acrylic polyurethane coatings).
On one side of the PVC film, a UV-hardened acrylic polyurethane coating containing collide silica is applied, covering a greenhouse or plastic shed to maintain its dust resistance for a long time, and the film is also better resistant to adhesion.
In addition to polyurethane( polyurethane), this UV hardening coating also contains polymerized monomers (active thinners) and sensing agents (light triggers) that, if necessary, increase organic solvents and additives that increase adhesion.The photo-polymerized acrylic polyurethanes applicable in
coatings can be produced by polyether polyols, polyester polyols or polyether polyols and polycycyanate reactions, and polysexual isocyanate reactions, and finally by ethylene monomer reactions containing active hydrogen atoms.
photoreceptiator is the trigger of photorecent polymerization reaction, so it is called light trigger, sometimes called photosensitive agent, the applicable photoreceptic agent has resting fragrance, resting incense ether, resting incense ether, resting balsamic ether, diphenylone, onion. Radon, etc.
if necessary (if the viscosity of the coating is too high), organic solvents can be added to regulate the viscosity, the applicable solvent has butyl ketones. methyl isoclode, ethyl acetate, butyl acetate; Ethanol, isopropyl alcohol, toluene and xylene, etc. If the adhesion or construction performance of the coating is not ideal, appropriate additives can also be added, the applicable coating additives are fluorofluoro surfactants or silicone surfactants. Organic fluorine surfactant can reduce the surface pressure of the coating and improve the moisture of the coating to the film. Silicone surfactants are called coupled agents and also help increase adhesion between coatings and films.
if the coating of UV hardening is too hard, a small amount of thermoplastic resin can be added to the coating formulation to increase the flexibility of the coating film. The applicable thermoplastic resins are polystyrene, PVC, acetate cellulose, rubber, low molecular weight polybutylene, low molecular polyphthalate, etc.