Epoxy acrylates
AssigneeHuntsman Advanced Materials Americas LLC
InventorsMartin Roth, Roger Salvin, Kurt Meier, Bernhard Sailer, Rolf Wiesendanger
Life of this patent
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Abstract
Epoxy acrylates and carboxyl group-containing epoxy acrylates of formulae III and IV of the claims that are relatively polymolecular and are chemically crosslinkable can be used in photoresist formulations with the additional use of highly polymerized polymer binders. Such resist formulations are used in particular in the field of printed circuit boards and printing plates, are applicable from aqueous medium, are almost tack-free and have very good edge coverage, especially on conductors.
Claims38
A photoresist formulation consisting of:
- (a) an epoxy acrylate of formula III
- wherein Q is hydrogen or a group of formula
- wherein
- R1 is —H or —CH3, and
- R2 is —H, —CH3 or phenyl,
- T is the radical of an aromatic bifunctional compound,
- M is each independently hydrogen or a group of formula
- in which
- R1 and R2 are as defined above,
- A is the radical of an aromatic bifunctional compound,
- n is an integer from 0 to 300,
- L is a group of formula
- or
- —O—A—OM,
- in which M, R1 and R2 are as defined above,
- with the proviso that in formula III not all radicals M may be simultaneously hydrogen or a group of formula
- but at least 10 mol % of the radicals M that are not present in the end groups Q and L are a group of the formula
- and with the proviso that when n in formula III is 0, then Q is hydrogen and L is the group of formula
- (b) a photoinitiator;
- and
- (c) optionally
- i) a (meth)acrylate monomer or (meth)acrylate oligomer or a vinyl compound that can be crosslinked with light;
- ii) water;
- iii) a Co-initiator;
- iv) a stabilizer;
- v) a thermal hardener;
- vi) a pigment or water-insoluble dye;
- vii) a water compatible organic or inorganic filler;
- viii) an antifoam agent;
- ix) an adhesion promotor;
- x) a fungicide;
- xi) a thixotropic agent;
- and
- xii) an organic solvent.
A method for the preparation of a photoresist formulation, consisting of the step of mixing
- (a) an epoxy acrylate of formula III
- wherein Q is hydrogen or a group of formula
- wherein
- R1 is —H or —CH3, and
- R2 is —H, —CH3 or phenyl,
- T is the radical of an aromatic bifunctional compound,
- M is each independently hydrogen or a group of formula
- wherein R1 and R2 are as defined above,
- A is the radical of an aromatic bifunctional compound,
- n is an integer from 0 to 300,
- L is a group of formula
- or
- —O—A—OM,
- wherein M, R1 and R2 are as defined above,
- with the proviso that in formula III not all radicals M may be simultaneously hydrogen or a group of formula
- but at least 10 mol % of the radicals M that are not present in the end groups Q and L are a group of the formula
- and with the proviso that when n in formula III is 0, then Q is —H and L is the group of formula
- with
- (b) a photoinitiator;
- and
- (c) optionally
- i) a (meth)acrylate monomer or (meth)acrylate oligomer or a vinyl compound that can be crosslinked with light;
- ii) water;
- iii) a Co-initiator;
- iv) a stabilizer;
- v) a thermal hardener;
- vi) a pigment or water-insoluble dye;
- vii) a water compatible organic or inorganic filler;
- viii) an antifoam agent;
- ix) an adhesion promotor;
- x) a fungicide;
- xi) a thixotropic agent;
- and
- xii) an organic solvent.
Dependencies are inferred from the claim text.