초록 ▼

A liquid ethylenically unsaturated polyetherurethane composition having a viscosity at 24°C. of 1000 to 10,000 centipoises dispersible in dilute aqueous sodium hydroxide is capable of being polymerized by actinic light to yield a solid having a Shore A hardness of at least 30 when the composition co

A liquid ethylenically unsaturated polyetherurethane composition having a viscosity at 24°C. of 1000 to 10,000 centipoises dispersible in dilute aqueous sodium hydroxide is capable of being polymerized by actinic light to yield a solid having a Shore A hardness of at least 30 when the composition contains 0.5 to 15 percent dialkyl, aminoalkyl, acrylate or methacrylate. The resulting polymer is capable of taking on excellent halftone or half dot quality.

대표청구항 ▼

In a liquid ethylenically unsaturated polyetherurethane composition having no free NCO, a viscosity at 24°C. of 1,000 to 10,000 centipoises, dispersible in dilute aqueous sodium hydroxide and capable of being polymerized by actinic light to yield a solid having a Shore A hardness of at least 30, the

In a liquid ethylenically unsaturated polyetherurethane composition having no free NCO, a viscosity at 24°C. of 1,000 to 10,000 centipoises, dispersible in dilute aqueous sodium hydroxide and capable of being polymerized by actinic light to yield a solid having a Shore A hardness of at least 30, the improvement wherein said composition contains 0.5 to 15 percent of dialkyl aminoalkyl acrylate or methacrylate, said alkyl radical containing 1 to 10 carbon atoms said improved composition being capable of producing a printing plate having fine half-tone dots.