Radiation cured elastomeric urethane acrylate films and the process for making same
OwnerDavid Hews, John Delude +3inventors
InventorsDavid Hews, John Delude, Leo Moreau, Dzu Luong, Edward D. Phillips
Life of this patent
Estimating the term…
Abstract
A radiation-cured, elastomeric, urethane acrylate polymer has an elongation at break of between 100% (50) and 400% and a film break strength of between 200 and 2,600 psi at a thickness between about 0.002 inches and 0.010 inches.
Claims26
An elastomeric urethane acrylate polymer film.
An optical structure, comprising:
- a urethane acrylate polymer film;
- and
- a layer of prismatic retroreflective structures attached to said urethane acrylate polymer layer.
A method of manufacturing an elastomeric urethane acrylate polymer film, comprising a step of curing by radiation a pre-polymer, said pre-polymer comprising multifunctional urethane acrylate monomeric or oligomeric subunits and monofunctional and multifunctional (meth)acrylate monomeric or oligomeric subunits.
A method of manufacturing an optical structure that includes an elastomeric urethane acrylate polymer film, and a layer of prismatic retroreflective structures attached to said urethane acrylate polymer film,
- said method comprising a step of radiation curing a pre-polymer that includes multifunctional urethane acrylate monomeric or oligomeric subunits and monofunctional and multifunctional (meth)acrylate monomeric or oligomeric subunits.
Dependencies are inferred from the claim text.