UV curable compositions
AssigneeHenkel Corporation
InventorsMark M. Konarski, Joel D. Schall
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Abstract
The present invention provides a UV curable composition comprising an acrylate component, comprising an acrylate-functionalized hydrogenated polybutadiene, and at least one mono-functional acrylate, and a photoinitiator combination triggered upon exposure to radiation at 365 nm of the electromagnetic spectrum comprising a bisacyl phosphine oxide and benzophenone, where when dispensed at a thickness of about 1 mm and exposed to UV radiation generated at a wavelength of 365 nm the composition cures through the thickness of the dispensed composition at a speed between 40 mm/sec to 100 mm/sec.
Claims8
A UV curable composition comprising:
- a acrylate component, comprising an acrylate-functionalized hydrogenated polybutadiene and at least one mono-functional (meth)acrylate,
- a combination of bisacyl phosphine oxide present in an amount between about 1.5 and about 4 weight percent and benzophenone present in an amount between about 0.01 and about 1 weight percent, wherein when dispensed at a thickness of about 1 mm and exposed to radiation at a wavelength of 365 nm at an intensity of between about 120 to about 130 mW/cm2 the composition cures through the thickness of the dispensed composition at a speed between 40 mm/sec to 100 mm/sec.
A method of curing at 365 nm at an intensity of between about 120 to about 130 mW/cm2 using an LED a UV curable composition at cure speeds within the range of about 40 mm/sec to about 100 mm/sec, comprising the steps of:
- a) dispensing onto a substrate a UV curable composition comprising an acrylate component, comprising an acrylate-functionalized hydrogenated polybutadiene and at least one mono-functional (meth)acrylate, bisacyl phosphine oxide and benzophenone, wherein the bisacyl phosphine oxide is present in an amount between about 1.5 and about 4 weight percent and the benzophenone is present in an amount between about 0.01 and about 1 weight percent;
- and
- b) exposing the UV curable composition to UV radiation at a wavelength of 365 nm at an intensity of between about 120 to about 130 mW/cm2 using an LED, such that the UV curable composition cures at cure speeds within the range of about 40 mm/sec to about 100 mm/sec.
Dependencies are inferred from the claim text.