220-260℃ Thermoplastic Expandable Microspheres CAS 38742-70-0 are high-performance physical foaming agents designed for specialty rubber. The microspheres expand stably within 220–260℃ temperature range and form uniform fine closed-cell structure inside rubber matrix. They realize lightweight modification, reduce raw material costs while maintaining elasticity, wear resistance and dimensional stability of rubber finished goods. Featuring outstanding thermal resistance, good shear resistance and

Product Detail

220-260℃ Thermoplastic Expandable Microspheres CAS 38742-70-0 Specialty Rubber Foaming Agent

Product Overview

220-260℃ Thermoplastic Expandable Microspheres CAS 38742-70-0 are high-performance physical foaming and lightweight functional fillers specially developed for specialty rubber materials. Optimized for the high-temperature vulcanization and molding characteristics of various specialty rubbers, these microspheres feature a precise and stable expansion temperature window of 220℃ to 260℃. They maintain complete particle structure and excellent shear resistance during rubber compounding, vulcanization and thermoplastic molding processes. The microspheres form uniform, dense and independent closed-cell structures inside rubber matrix, effectively reducing product density and cutting raw material costs. While achieving efficient lightweight modification, they perfectly retain the original elasticity, wear resistance, toughness and dimensional stability of specialty rubber products. With superior high-temperature stability and excellent compatibility with diverse rubber formulations, it is a premium dedicated foaming agent for high-performance lightweight rubber products.

Core Features

220-260℃ Accurate High-Temperature Foaming Window: Customized temperature resistance perfectly matches the high-temperature processing and vulcanization temperature of specialty rubber. No premature foaming, particle rupture or cell collapse occurs during production, ensuring stable and controllable foaming effect for mass industrial production.

Excellent Compounding Shear Resistance: Reinforced microsphere shell structure withstands strong mechanical shear force during rubber mixing, kneading and extrusion. Ultra-low particle breakage rate effectively avoids uneven foaming, surface pits and crack defects of rubber finished products.

Stable Lightweight & Cost-Effective Optimization: Delicate closed-cell structure achieves uniform lightweight effect for rubber products. It significantly reduces rubber material consumption and overall production costs without sacrificing the elasticity, mechanical strength and wear resistance of specialty rubber parts.

Superior Rubber Compatibility: Ultra-fine powder disperses evenly in all kinds of specialty rubber and thermoplastic rubber systems without agglomeration. It will not affect rubber vulcanization efficiency, surface finish, adhesion performance and secondary processing properties.

Improve Rubber Product Dimensional Stability: Effectively relieves internal stress generated during rubber high-temperature molding and vulcanization, inhibits product shrinkage, warping and deformation, and greatly improves the yield and dimensional accuracy of precision rubber products.

Eco-Friendly Physical Foaming Technology: Adopts pure physical thermal expansion principle, no chemical decomposition, low odor and low VOC. Free of harmful residues, it meets environmental protection and safety standards for automotive rubber parts, industrial sealing rubber and high-end rubber accessories.

Product Specifications

Product Name: 220-260℃ Thermoplastic Expandable Microspheres

CAS No: 38742-70-0

Product Type: Specialty Rubber Foaming Agent, Thermoplastic Lightweight Functional Filler

Foaming Temperature Range: 220℃–260℃

Appearance: White Ultra-Fine Powder

Applicable Materials: All types of specialty rubber, thermoplastic rubber and modified rubber materials

Applicable Processes: Rubber high-temperature vulcanization, compounding, extrusion and injection molding

Core Function: Rubber foaming modification, lightweight optimization, density reduction, production cost saving

Recommended Dosage: 1.2%–3.8% (Adjustable according to lightweight ratio and product performance requirements)

Application Scope

Specially designed for lightweight foaming modification of various specialty rubber products. Widely applicable to automotive foam rubber parts, industrial sealing rubber, shock-absorbing rubber accessories, thermoplastic rubber products, high-elasticity modified rubber materials and other high-end rubber products. It effectively solves the pain points of heavy weight, high material consumption and poor dimensional stability of traditional solid rubber parts, and is widely used in automobile industry, industrial manufacturing, electronic equipment and rubber processing fields.

Usage Guide

Mix thermoplastic expandable microspheres with rubber raw materials evenly through low-speed room-temperature stirring and mixing. Avoid high-intensity shear kneading and long-term high-temperature preheating to prevent microsphere damage and premature foaming. Carry out conventional rubber compounding, vulcanization and molding processes. The microspheres complete stable thermal expansion and uniform closed-cell forming under 220–260℃ processing conditions. Adjust microsphere dosage, vulcanization temperature, processing speed and pressure parameters appropriately according to product lightweight standards and surface quality requirements. Keep raw materials sealed and moisture-proof during production and storage.

Packaging & Storage

Packaging: 25kg sealed moisture-proof composite bag with inner PE liner, dust-proof and leak-proof, suitable for industrial bulk supply and long-distance transportation.

Storage: Store in a dry, cool and ventilated warehouse, keep tightly sealed at all times. Avoid direct sunlight, high-temperature stacking and humid environment to prevent caking and spontaneous foaming. Standard shelf life is 12 months under proper storage conditions.

Our Advantages

Our 220-260℃ thermoplastic expandable microspheres are professionally customized for specialty rubber high-temperature processing and vulcanization. Featuring accurate temperature matching, strong shear resistance, stable expansion ratio and excellent batch consistency, the product forms uniform and delicate closed-cell structures. It realizes efficient lightweight and cost reduction while retaining the excellent elasticity and mechanical properties of rubber products. We support factory direct sales, stable bulk supply, free sample testing and professional rubber foaming formula technical services to help customers optimize product performance and market competitiveness.

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.