Resin composition having improved haze and light transmittance and process for preparing the same
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Solution Overview
Problem
Current polycarbonate resin compositions struggle to achieve a balance between high haze and high light transmittance, often resulting in energy inefficiency due to the use of materials like polymethyl methacrylate microbeads or silicon resin, which either increase haze at the cost of transmittance or vice versa.
Innovation Solution
A resin composition comprising a matrix resin blended with crosslinked copolymer microspheres and optional silicone resin microspheres, where the crosslinked copolymer microspheres are formed from anhydride, amide, and olefin monomers, and the silicone resin microspheres are dispersed in the matrix resin to effectively disperse light, increasing haze while maintaining high transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polymethyl methacrylate microbeads or glass beads are added to increase haze, then haze is improved, but light transmittance is significantly reduced
Solution Approach 1:
The invention changes the refractive index parameter of the light diffusing agent by using fluorinated polymer particles with refractive index of 1.25-1.65, which is closer to polycarbonate (1.58), thereby reducing light absorption and improving light transmittance while maintaining high haze
Solution Approach 2:
The invention uses a composite light diffusing agent system comprising fluorinated polymer particles and fluorinated silane-modified polyethylene particles, where each component contributes different properties to achieve both high haze and high light transmittance simultaneously
2Ease of manufacture
If silicon resin is added to increase haze to above 90%, then haze is improved, but light transmission is reduced to only 40%
Solution Approach 1:
The invention changes the refractive index parameter of the light diffusing agent to be closer to the matrix resin by using fluorinated polymers with refractive index of 1.25-1.65, reducing the refractive index difference and minimizing light absorption losses
Solution Approach 2:
The invention uses fluorinated silane-modified polyethylene particles that can be easily incorporated and provide effective light diffusion without requiring high concentrations, reducing overall material usage and energy loss
3Object-affected harmful factors
If light diffusing material is used to convert point light source into surface light source, then visual comfort is improved, but energy consumption increases due to multiple refraction and absorption
Solution Approach 1:
The invention optimizes the refractive index parameter of the light diffusing particles to minimize refraction and absorption losses by matching it closer to the matrix resin, thereby reducing energy consumption while maintaining visual comfort
Solution Approach 2:
The invention converts the typically harmful refraction and absorption effects into beneficial light diffusion by carefully selecting particles with refractive indices that create optimal scattering while minimizing energy loss
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 haze of not less than 92% and a light transmittance of not less than 55%, reducing energy loss and enabling energy savings while maintaining excellent light diffusing properties.
Implementation Method 1
since the two materials differ in refractive index, light is involved in refraction and absorption on the surface of these particles multiple times
Implementation Method 2
due to the diffusing effect of the material, point light source can be converted into surface light source
Data Source
AI summary
The present invention relates to a resin composition having improved haze and light transmittance in the technical field of polymer materials and the process for preparing the same. The resin composition is characterized by comprising the following blended components: a. matrix resin; and b. crosslinked copolymer microspheres; wherein the crosslinked copolymer microspheres are alternating copolymers formed from monomers having anhydride, amide and/or imide groups, with olefin monomers and/or furan and its derivatives and optionally crosslinked with a crosslinking agent; preferably, the resin composition has a haze of not less than 92%, and a light transmittance of not less than 55%, preferably a haze of not less than 92%, and a light transmittance of not less than 59%, and more preferably a haze of not less than 95%, and a light transmittance of not less than 59%. The resin composition of the present invention can save a lot of energy while achieving excellent light diffusing effect, and at the same time reduces the material cost and can be easily industrially produced in mass.