CAS 38742-70-0 Dry Expanded Hollow Polymer Microspheres are pre-expanded hollow microspheres designed as functional additives for thermal insulation mortar. With stable closed-cell hollow structure, they can disperse evenly inside mortar systems. The microspheres form countless isolated air cavities after mixing, greatly enhancing thermal insulation capacity of mortar, lowering bulk density and achieving lightweight modification. They feature good compatibility with cement-based mortar materials

Product Detail

CAS 38742-70-0 Dry Expanded Hollow Polymer Microspheres Thermal Insulation Mortar Additive

Product Overview

Dry Expanded Hollow Polymer Microspheres CAS 38742-70-0 are pre-expanded hollow functional fillers specially developed for cement-based thermal insulation mortar. Featuring complete closed-cell hollow structure, the microspheres can be uniformly dispersed inside mortar systems. A large number of isolated air pockets are formed inside mortar matrix after mixing, which effectively improve thermal insulation performance and reduce bulk density to achieve lightweight modification.

The product enjoys good compatibility with cement, ash calcium powder and other conventional mortar raw materials. It has minor negative influence on workability and bonding strength of mortar. Suitable for various building thermal insulation mortar formulas, it serves as high-efficiency lightweight thermal insulation additive for exterior wall and interior thermal insulation projects.

Core Features

Pre-expanded dry powder, ready for direct mixing
No secondary heating expansion required, convenient for dry-mix mortar production.
Closed-cell hollow structure for superior heat insulation
Independent air cavities block heat transfer and significantly lower thermal conductivity.
Realize lightweight modification
Reduce mortar bulk density, lighten building load and cut transportation costs.
Excellent dispersibility
Free-flowing powder, evenly mixed in dry mortar production line.
Good inorganic system compatibility
Compatible with cement-based thermal insulation mortar without obvious formula conflict.
Stable finished mortar performance
Help control mortar shrinkage and reduce cracking risks under reasonable dosage.

Product Specifications

Product Name: Dry Expanded Hollow Polymer Microspheres

CAS No: 38742-70-0

Appearance: White free-flowing dry powder

Core Function: Thermal insulation, lightweight filling, density reduction

Applicable Systems: Cement-based thermal insulation dry mortar

Recommended Dosage: 2%–9% of total formula weight, adjust based on target thermal conductivity

Application Scope

Mainly applied to exterior wall thermal insulation mortar, interior thermal insulation mortar, thermal insulation putty, lightweight filling mortar and other building dry-mix mortar products. Widely used in residential buildings, commercial real estate, industrial plant energy-saving renovation and other construction thermal insulation fields.

Usage Guide

Mix microspheres with other mortar raw materials in dry mixing procedure. Low-speed mixing is recommended to avoid high shear force breaking microsphere shells. Do not adopt prolonged intense stirring. Adjust addition amount to balance thermal insulation effect, mechanical strength and construction performance. Seal packages tightly to prevent moisture absorption during storage.

Packaging & Storage

Packaging: Moisture-proof composite bags or fiber drums lined with plastic film.

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

Shelf Life: 12 months under qualified dry storage conditions.

Our Advantages

Our dry expanded hollow polymer microspheres feature intact spherical structure, stable particle size and consistent batch performance. Compared with traditional lightweight aggregates, it delivers better thermal insulation with lower addition amount. Factory direct supply, stable stock, free sample testing and mortar formulation technical support are provided for customers.

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