Radiation-curable compositions for improved weather resistance
AssigneeStepan Company
InventorsMingzhe Wang, Michael Edward O'Brien, Rick Tabor
Life of this patent
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Abstract
Disclosed are radiation-curable compositions comprising at least one ortho-phthalate (meth)acrylate, and optionally a (meth)acrylate monomer, a stabilizing package, an adhesion promoter, and/or a photoinitiator. The compositions maintain physical integrity when cured and then aged for seven days under the conditions of 70% relative humidity, 77° C. black panel temperature, 55° C. chamber air temperature and a light intensity of 0.51 W/m2/nm at 340 nanometer wavelength passed through a daylight filter. The preparation and use of these compositions are also disclosed.
Claims11
A radiation-curable composition comprising:
- (a) at least one ortho-phthalate (meth)acrylate oligomer which is the reaction product of an ortho-phthalate modified polyester polyol with (meth)acrylic acid or a derivative thereof, wherein the ortho-phthalate modified polyester polyol is selected from the group consisting of (i) an ortho-phthalate polyester-ether polyol, and (ii) the reaction product of an ortho-phthalic acid-based material with diethylene glycol, a higher functional polyol having an average functionality of greater than two, and a long chain alkyl acid, ester or oil, wherein the reaction product has an average functionality of two;
- (b) optionally, at least one photoinitiator;
- and
- (c) optionally, at least one reactive diluent,
- wherein the composition maintains physical integrity when cured and then aged for 7 days under the conditions of 70% relative humidity, 77° C. black panel temperature, 55° C. chamber air temperature and a light intensity of 0.51 W/m2/nm at 340 nanometer wavelength passed through a daylight filter.
A radiation-curable composition consisting essentially of:
- (a) one or more ortho-phthalate (meth)acrylate oligomers which are the reaction product of an ortho-phthalate polyol with (i) a (meth)acrylic acid or a derivative thereof:
- or (ii) an isocyanate compound having a functionality of two and a hydroxyl containing (meth)acrylic compound;
- (b) optionally, at least one photoinitiator;
- and
- (c) optionally, at least one reactive diluent,
- wherein the composition maintains physical integrity when cured and then aged for 7 days under the conditions of 70% relative humidity, 77° C. black panel temperature, 55° C. chamber air temperature and a light intensity of 0.51 W/m2/nm at 340 nanometer wavelength passed through a daylight filter.
Dependencies are inferred from the claim text.