High transmittance cross-linked PMMA light diffuser is white spherical powder for PC resin and optical coating. It has lower cost than silicone diffuser, good dispersion, balances high transmittance and anti-glare haze, ideal for PC lampshade and AG film, free samples available.

Product Detail

High Transmittance PMMA Light Diffuser for PC Resin & Coating

Product Overview

This high transmittance PMMA light diffuser is a cross-linked polymethyl methacrylate spherical micro-powder, a cost-effective light diffusion additive for PC/PS high refractive index substrates and optical coatings. It forms a proper refractive index difference with PC/PS resin and coating binders, achieving good light diffusion effect at lower cost than silicone light diffusers, and is the first choice for cost reduction of mass-produced PC light diffusion parts and anti-glare coatings.

*Note: This product is not suitable for pure PMMA acrylic substrate, as the refractive index is close to PMMA and cannot produce effective light scattering.

Core Advantages

Cost-effective light diffusion effect
With a refractive index of 1.49, it forms a 0.1 refractive index difference with PC (refractive index 1.59) and PS (refractive index 1.59) substrates, which can achieve uniform light diffusion and anti-glare effect, and the cost is 20%-30% lower than silicone light diffusers, which is suitable for mass production of cost-sensitive light diffusion products.
High light transmittance performance
Optimized spherical structure and particle size distribution, light loss is lower than 3% at the same haze, 5% higher light transmittance than ordinary silicone diffusers, suitable for high-brightness PC LED lampshades and high-transmittance anti-glare films.
Good dispersion in PC and coating
Regular spherical structure and special surface treatment, good compatibility with PC resin, coating acrylic resin, PU resin, easy to disperse without agglomeration, no crystal points, no precipitation, suitable for injection, extrusion, coating and other processes.
Good processing stability
Heat resistance up to 250℃, adapts to PC conventional processing temperature (260-300℃ short-term processing), no decomposition, no yellowing during processing, no impact on the physical properties of the substrate, high yield of finished products.
Narrow particle size distribution
Strict particle size control, no coarse particles, uniform haze of finished products, no local light transmission or glare points, suitable for high-uniformity optical coating and thin-walled PC parts.

Typical Performance

The product appears as white regular spherical powder, D50 particle size 3-5μm, refractive index 1.49, whiteness over 96, volatile matter below 0.5%, oil absorption value low, easy to disperse in resin and coating. All indicators meet industrial optical grade requirements, comply with RoHS and REACH environmental standards.

Recommended Applications

PC LED lampshades, PC light diffusion sheets, PC LED tubes and other PC injection/extrusion light diffusion parts
PS lampshades, PS light diffusion plates
Anti-glare (AG) hard coating for display screens, touch screens
Light diffusion coating for light boxes, advertising panels
Matte coating, ink matting additive

Usage Guidelines

For PC/PS resin modification, recommended addition rate is 0.3%-1.2%, adjusted according to wall thickness and required haze: 0.3%-0.7% for thick-walled high-transmittance products, 0.7%-1.2% for conventional products. It can be directly mixed with resin pellets for injection/extrusion, or pre-made into 5% concentration masterbatch for more uniform dispersion. Processing temperature follows conventional PC/PS processing parameters, no special adjustment required.

For coating application, recommended addition rate is 3%-8%, dispersed in coating at high speed, can be used after filtering, suitable for solvent-based, water-based, UV curing coating systems.

We provide free samples for testing, and technical support for formula adjustment.

Packaging & Support

20kg per moisture-proof kraft drum with PE inner liner, 1kg small bag for sampling available. Store in cool dry place, shelf life 24 months. Bulk stock available, delivery within 3 working days, full TDS/MSDS/COA documents provided, customized particle size supported.

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