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US 2026/0226310 A1Published application
Radical-curable composition
AssigneeCovestro (Netherlands) B.V.
InventorsJohan Franz Gradus Antonius Jansen, Erik-Jan van den Biggelaar
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AssigneeCovestro (Netherlands) B.V.
InventorsJohan Franz Gradus Antonius Jansen, Erik-Jan van den Biggelaar
Estimating the term…
The present invention is directed to a radical-curable coating composition comprising (A) One or more oligomers selected from the group consisting of urethane (meth)acrylates, (meth)acrylated epoxidized triglycerides and any mixture thereof, wherein said oligomers have a molar mass equal to or higher than 800 g/mol and lower than 4500 g/mol, (B) One or more methacrylate reactive diluents having a molar mass lower than 800 g/mol, wherein said methacrylate reactive diluents have an average methacrylate functionality higher than 2, (C) One or more acrylate reactive diluents having a molar mass lower than 800 g/mol, wherein said acrylate reactive diluents have an average acrylate functionality higher than 2, (D) One or more photo-initiators, and (E) One or more thermal initiators, wherein the acrylate functionalities of the acrylate reactive diluents (C) and the methacrylate functionalities of the methacrylate reactive diluents (B) are present in a molar ratio of the acrylate functionalities to the methacrylate functionalities of at least 0.2, wherein the amount of oligomers (A) is higher than 20 wt. % and lower than 90 wt. % and the amount of reactive diluents (B) and (C) is higher than 10 wt. % and lower than 80 wt. %, based on the total amount of (A), (B) and (C), and wherein the total amount of (A), (B) and (C) is at least 25 wt. % of the radical-curable coating composition.
1-16. (canceled)
A radical-curable coating composition comprising
The composition according to claim 1, wherein the acrylate functionalities of the acrylate reactive diluents (C) and the methacrylate functionalities of the methacrylate reactive diluents (B) are present in a molar ratio of the acrylate functionalities to the methacrylate functionalities of at least 1.5 and at most 5.
The composition according to claim 1, wherein the average acrylate functionality of the acrylate reactive diluents (C) is higher than 2.2.
The composition according to claim 1, wherein said one or more oligomers (A) are present in an amount of at least 40 wt. %, based on the total amount of (A), (B) and (C) and said one or more reactive diluents (B) and (C) are present in an amount of at most 60 wt. %, based on the total amount of (A), (B) and (C).
The composition according to claim 1, wherein the total amount of (A), (B) and (C) is at least 60 wt. % by weight of the radical-curable coating composition.
The composition according to claim 1, wherein the one or more photo-initiators are α-cleavage photo-initiators.
The composition according to claim 1, wherein the one or more thermal initiators are selected from the group consisting of free radical thermal initiators having a 0.1 hour half-life temperature of at least 70° C.
The composition according to claim 1, wherein the one or more thermal initiators are selected from the group consisting of free radical thermal initiators having a maximum storage temperature of at least 5° C.
The composition according to claim 1, wherein the one or more thermal initiators are selected from the group consisting of peresters, monopercarbonates, peranhydrides or any mixture thereof.
The composition according to claim 1, wherein the composition further comprises one or more inhibitors selected from the group consisting of hydroquinones, phenols, catechols, benzoquinones, orthoquinones and mixtures thereof.
Dependencies are inferred from the claim text.