Pre-expanded Lightweight Microspheres CAS 38742-70-0 are hollow thermoplastic microspheres developed as functional filler and density reducer for artificial marble. With intact closed-cell structure and uniform particle size, they can be evenly dispersed into unsaturated polyester and resin systems for artificial marble. The microspheres greatly lower the density of artificial marble products, reduce raw material costs and product weight. Meanwhile, it helps ease curing shrinkage and improves pr

Product Detail

Pre-expanded Lightweight Microspheres CAS 38742-70-0 Artificial Marble Filler Density Reducer

Product Overview

Pre-expanded Lightweight Microspheres CAS 38742-70-0 are hollow thermoplastic microspheres specially designed as lightweight filler and density reducer for artificial marble. Featuring intact closed-cell structure and uniform particle distribution, the microspheres can disperse evenly in unsaturated polyester resin and other artificial marble resin systems.

It significantly cuts the density of artificial marble, reduces product weight and raw material costs. Meanwhile, it effectively controls curing shrinkage and improves cutting and polishing performance of finished products. The product has good compatibility with conventional marble formulas, less likely to form surface pores and flaws, which makes it an excellent lightweight additive for artificial marble slabs, countertops and decorative profiles.

Core Features

Ready-to-use pre-expanded powder
No secondary heating required, directly added into resin slurry to simplify production procedures.
Ultra-lightweight hollow closed-cell structure
Remarkably lower product density, realize lightweight artificial marble and reduce transportation load.
Good dispersibility
Free-flowing powder, evenly mixed in resin system under low-speed stirring.
Optimize processing performance
Relieve curing shrinkage, reduce deformation and improve machinability for cutting and polishing.
Excellent resin compatibility
Compatible with unsaturated polyester resin commonly used for artificial marble.
Stable surface effect
Help obtain smooth surface after polishing with minimal visible defects under reasonable formulation.

Product Specifications

Product Name: Pre-expanded Lightweight Microspheres

CAS No: 38742-70-0

Appearance: White free-flowing dry powder

Core Function: Lightweight filling, density reduction, shrinkage control for artificial marble

Applicable Systems: Unsaturated polyester artificial marble, engineered stone

Recommended Dosage: 3%–12% based on total formula weight, adjusted according to target density

Application Scope

Mainly applied to artificial marble countertops, wall panels, decorative slabs, craft ornaments and engineered stone products. Widely used in kitchen and bathroom decoration, interior construction, furniture and handicraft industries.

Usage Guide

Add microspheres in the later stage of slurry mixing. Use low-speed stirring to avoid high shear force breaking microsphere shells. Control stirring time to guarantee uniform distribution. Adjust dosage to balance lightweight effect, mechanical strength and surface quality. Seal tightly to prevent moisture absorption during storage.

Packaging & Storage

Packaging: Moisture-proof composite bags or fiber drums with inner plastic liner.

Storage: Store in cool, dry and ventilated warehouse. Avoid dampness, heavy extrusion and direct sunlight.

Shelf Life: 12 months under proper dry storage conditions.

Our Advantages

Our pre-expanded lightweight microspheres maintain complete spherical structure with stable batch quality. Compared with traditional mineral fillers, it achieves obvious lightweight effect without greatly damaging surface texture. Factory direct supply, sufficient inventory, free sample testing and technical formula support are available.

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