Low chroma, dark photo-curable compositions
OwnerHugh Stephen Laver, Jules Lahave +1inventors
InventorsHugh Stephen Laver, Jules Lahave, Conny Te Walvaart
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Abstract
The invention provides a photo-curable composition for manufacturing thick layers of homogeneous grey to black colour with excellent physical properties as required for use in high tech applications such as for example powder coatings. Such compositions were highly desirable but yet unachieved in the art. The instant composition comprises a radiation curable material as well as both an iron oxide and a phthalocyanine pigment. It has a lightness (L*) of from 0 to 90 and a chroma (C*) of from 0 to 30. The process of hardening said composition by irradiation with light of the wavelength from 150 to 600 nm is also claimed.
Claims15
A composition having a lightness (L*) of from 0 to 90 and a chroma (C*) of from 0 to 30, comprising a radiation curable material, iron oxide and a phthalocyanine pigment.
A composition comprising homogeneously mixed iron oxide and phthalocyanine pigment in a weight ratio of from 5:1 to 125:1, especially from 10:1 to 75:1, most preferred from 15:1 to 50:1, very especially from 20:1 to 30:1.
A process for the photopolymerization of a composition comprising a monomeric, oligomeric or polymeric compound containing at least one ethylenically unsaturated double bond, a photoinitiator, iron oxide and phthalocyanine, wherein said composition is irradiated with light of the wavelength from 150 to 600 nm.
A process for coating a substrate with a powder composition comprising:
- i) electrostatic application of the powder composition;
- ii) application of heat to melt and fuse the powder;
- then
- iii) electromagnetic irradiation of the coating.
Dependencies are inferred from the claim text.