Photo active agents
AssigneeHewlett-Packard Development Company, L.P.
InventorsZhang-Lin Zhou, Marisa Samoshin, Rodney David Stramel
Life of this patent
Estimating the term…
Abstract
The present disclosure is drawn to a photo active agent which includes a bisacylphosphinic compound in the form of an acid or salt having Structure I: where A and A′ are independently aryl or from C2 to C8 lower alkyl; M is H, a monovalent cation, a divalent cation, or mixture thereof; n is 1 or 2; and q is 1 or 2. The photo active agent can be present in a composition that includes from 0.001 wt % to 5 wt % of a dialcohol phosphinic acid precursor or dialcohol phosphinic salt of the bisacylphosphinic compound of Structure I.
Claims17
A photo active agent, comprising a bisacylphosphinic compound in the form of an acid or salt having Structure I:
- wherein A and A′ are independently aryl or from C2 to C8 lower alkyl;
- M is H, a monovalent cation, a divalent cation, or mixture thereof;
- n is 1 or 2;
- and q is 1 or 2, and wherein the photo active agent is present in a composition that includes from 0.001 wt % to 5 wt % of a dialcohol phosphinic acid precursor or dialcohol phosphinic salt of the bisacylphosphinic compound of Structure I.
A method of making a photo active agent, comprising:
- reacting a phosphinic acid with an aryl or C2 to C8 lower alkyl adhehyde to form a dialcohol phosphinic acid precursor;
- and
- oxidizing the dialcohol phosphinic acid precursor to form the photo active agent which comprises a bisacylphosphinic acid.
The method of calm 5, further comprising basifying the bisacylphosphinic acid to form a bisacylphosphinic salt.
A photo curable ink, comprising:
- a photo reactive binder;
- a photo active agent comprising a bisacylphosphinic compound in the form of an acid or salt having Structure I:
- wherein A and A′ are independently aryl or from C2 to C8 lower alkyl;
- M is H, a monovalent cation, a divalent cation, or mixture thereof;
- n is 1 or 2;
- and q is 1 or 2;
- a co-photo active agent, wherein the co-photo active agent comprises a photo initiator, a synergist, or a sensitizer;
- a dialcohol phosphinic acid precursor or dialcohol phosphinic salt of the photo active agent of Structure I;
- a colorant;
- and
- a liquid vehicle including co-solvent and water.
Dependencies are inferred from the claim text.