Halogenated Epoxy Acrylate Resin for 3D Printed Optical Lenses
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Solution Overview
Problem
Current crosslinkable and photocrosslinkable formulations are not suitable for 3D printing of optical objects, as they fail to meet the required criteria for viscosity, heat deflection temperature, refractive index, and Young's modulus, which are essential for optical applications.
Innovation Solution
A crosslinkable composition comprising halogenated bisphenol A diglycidyl ether tetra(meth)acrylate and diluent mono(meth)acrylates of monoalcohols with a biphenyl structure, along with optional components such as (meth)acrylated oligomers, epoxidized biphenyl derivatives, and urethane (meth)acrylates, to achieve the necessary physicochemical properties for 3D printed objects with high refractive index and heat deflection temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional crosslinkable formulations are used, then crosslinking capability is achieved, but viscosity is too high for 3D printing
Solution Approach 1:
The patent modifies the chemical composition parameters by introducing halogenated bisphenol A diglycidyl ether tetra(meth)acrylate and diluent mono(meth)acrylates of monoalcohols with biphenyl structure, changing the physical parameters of viscosity and refractive index to meet 3D printing requirements while maintaining crosslinking capability
Solution Approach 2:
The formulation creates a composite system combining epoxy (meth)acrylates with specific diluents and optional components like urethane (meth)acrylates and polyester (meth)acrylates, achieving a balanced composition that simultaneously provides low viscosity for printability and high refractive index for optical performance
2Illumination intensity
If high refractive index materials are used, then optical performance is improved, but heat deflection temperature decreases
Solution Approach 1:
The patent carefully selects and balances the chemical structures of the epoxy (meth)acrylate and diluent components to achieve a specific range of refractive index (1.50-1.70) while maintaining heat deflection temperature above 70°C, optimizing the molecular weight and functional group composition
Solution Approach 2:
The formulation combines high refractive index halogenated bisphenol A diglycidyl ether tetra(meth)acrylate with structural diluents and optional reinforcing components like urethane (meth)acrylates, creating a composite system where the synergistic interaction maintains both optical and thermal properties
3Ease of manufacture
If viscosity is reduced for 3D printing, then printability is improved, but refractive index decreases
Solution Approach 1:
The patent introduces halogenated bisphenol A diglycidyl ether tetra(meth)acrylate which provides high refractive index contribution while maintaining acceptable viscosity, and balances it with diluent mono(meth)acrylates to achieve the optimal viscosity range of 500-5000 mPa·s at 25°C
Solution Approach 2:
The formulation creates a multi-component composite where the high refractive index epoxy (meth)acrylate is combined with diluents and optional components in specific ratios, achieving a balance where the composite refractive index remains above 1.50 while viscosity is reduced to 5000 mPa·s or below for 3D printing feasibility
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition achieves a viscosity of less than 1500 mPa·s, a heat deflection temperature of over 80°C, and a refractive index of at least 1.59, meeting the criteria for 3D printed optical objects, enabling their use in applications like lenses and optical coatings.
Implementation Method 1
crosslinkable, in particular photocrosslinkable, composition
Data Source
AI summary
The invention relates to a crosslinkable composition, which comprises a component a) at least one halogenated bisphenol A diglycidyl ether tetra(meth)acrylate and a component b) at least one diluent from mono(meth)acrylates of a monoalcohol comprising a biphenyl structure, and at least one optional component from components c), d), e), f) and g). 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.