Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1977-12-23
1979-02-06
Turer, Richard B.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415919, 20415922, 20415923, 260859R, 427 44, 427 54, 428425, 428443, C08F 800, C08G 1800
Patent
active
041382994
ABSTRACT:
A liquid radiation and moisture curable 100% reactive coating which cures to yield a clear, tough, glossy abrasion-resistant cured coating is described. The radiation and moisture curable 100% reactive coating composition comprises: 15 to 60 parts by weight acrylate diluents; and 40 to 85 parts by weight of isocyanate terminated urethane prepolymers formed by reacting a mixture of polyester diols and triols with excess aliphatic diisocyanate to form --NCO terminated prepolymer and then reacting the --NCO terminated prepolymers with sufficient hydroxy acrylate to cap between about 5% and 15% of the available --NCO sites to form addition polymerizable ethylenically unsaturated sites and a photoinitiator when light is the radiation source. When the coating is exposed to a source of radiation, the ethylenically unsaturated monomers and prepolymers polymerize to develop a tack-free surface coating, after which the partially reacted coating is further polymerized through the isocyanate terminated prepolymer portion by moisture curing to form the fully cured tough, glossy, abrasion-resistant coating. The coatings of this invention are particularly well adapted for providing a decorative thermoplastic surface covering with a clear, tough, glossy, abrasion-resistant, light-stable, no-wax wear layer.
REFERENCES:
patent: 3935330 (1976-01-01), Smith et al.
patent: 4025407 (1977-05-01), Chang et al.
Armstrong Cork Company
Turer Richard B.
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