Cross-linkable compositions having a low viscosity for coatings and materials with a high refractive index and a high heat deflection temperature
AssigneeArkema France
InventorGuillaume Monnier
Life of this patent
Estimating the term…
Abstract
The invention relates to a crosslinkable composition which comprises a component a) at least one bisphenolfluoroene diglycidyl ether tetra(meth)acrylate, a component b) at least one diluent from the mono(meth)acrylates of a monoalcohol comprising a biphenyl, cumyl or benzyl structure, and at least one optional component from components c), d) and e). It also relates to its use for coatings or materials, in particular for 3D printed articles for optical applications, as it also relates to the crosslinked composition and to the finished product, in particular the 3D article which results therefrom.
Claims21
A crosslinkable composition comprising:
- a) at least one biphenylfluorene diglycidyl ether tetra (meth) acrylate oligomer of formula (I) below:
- or the bisphenolfluorene diglycidyl ether tetraacrylate of the same formula (I) except that the methyl group of the methacrylate is absent, with all of the methacrylate groups being replaced by acrylate groups,
- b) at least one diluent from mono (meth) acrylates of an optionally alkoxylated monoalcohol selected from biphenyl-4-methanol, biphenyl-2-ol, 4-cumyl phenol or benzyl alcohol,
- c) optionally at least one (meth) acrylate oligomer with a (meth) acrylate functionality of at least 2, selected from urethane (meth) acrylates or thiocarbamate (meth) acrylates,
- d) optionally at least one (meth) acrylate ester monomer or urethane (meth) acrylate monomer with a functionality of from 1 to 6, different from b),
- e) optionally at least one oligomer from polyester (meth) acrylate, polyether (meth) acrylate or epoxy (meth) acrylate with a functionality of from 1 to 15,
- wherein the content by weight of component a), with respect to the weight a)+b), is from 20% to 80%.
Dependencies are inferred from the claim text.