초록 ▼

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 w

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.

대표청구항 ▼

In a process wherein a liquid coating is subjected to a combined radiation and moisture cure to yield a tough mar-resistant glossy film, the improvement comprising using a liquid coating consisting essentially of: a. 15 to 60 parts by weight of acrylate diluents with 10 to 90% by weight being monoet

In a process wherein a liquid coating is subjected to a combined radiation and moisture cure to yield a tough mar-resistant glossy film, the improvement comprising using a liquid coating consisting essentially of: a. 15 to 60 parts by weight of acrylate diluents with 10 to 90% by weight being monoethylenically unsaturated and the balance di or tri-ethylenically unsaturated, said diluents have no reactive hydroxyl groups; and b. 40 to 85 parts by weight －NCO terminated prepolymers prepared by reacting a mixture of 20 to 80% by weight polyester diol and 20 to 80% by weight polyester triol with an excess of an aliphatic diisocyanate, said prepolymer mixture being further reacted with sufficient hdyroxy acrylate to cap 5 to 15% of the available －NCO groups.