High Styrene Rubber (HSR)

Product Overview

High Styrene Rubber (HSR) is a specialized variety of styrene-butadiene rubber characterized by its high styrene content. It is a non-polar polymer prepared through emulsion copolymerization of styrene and butadiene monomers. HSR is also known as hard rubber due to its enhanced hardness properties compared to conventional styrene-butadiene rubber.

Chemical Structure: —[CH₂—CH=CH—CH₂]ₘ—[(C₆H₅)—CHCH₂]ₙ—

Physical Appearance: White granular particles

Characteristics: Non-toxic, odorless, combustible

Heat Distortion Temperature: 70-90°C

Technical Specifications

HSR Technical Data by Grade

Property	Units	Test Method	HS-60	HS-68	HS-80
Bound Styrene	%	ASTM D5775	60-65	66-70	80-85
Volatile Matter	%	ASTM D5668	≤5.0	≤5.0	≤5.0
Organic Acid	%	ASTM D5774	3.5-5.5	3.5-5.5	3.5-5.5
Organic Soap	%	ASTM D5774	≤0.5	≤0.5	≤0.5
Tensile Strength	MPa	ASTM D412	≥15.0	≥20.0	≥25.0
Shore D Hardness	Shore D	DIN 53505	50-60	61-70	71-80
Mooney Viscosity ML(1+4)100°C	-	ASTM D1646	50-65	55-70	71-85

Key Features & Benefits

Enhanced hardness compared to conventional SBR
Superior mechanical properties with improved tensile strength
Excellent tear and wear resistance
Easy mixing and processing advantages
Thermal stability with heat distortion range: 70-90°C
Excellent electrical insulation properties
Simple pigmentation capability for easy coloring
Non-toxic and odorless characteristics

Key Applications

Footwear: Hard soles, rigid foam soles, synthetic leather, athletic components
Flooring: Rubber tiles and industrial flooring systems
Industrial Products: Rollers, gaskets, seals, hard tubing, foam products
Sports Equipment: Sports balls, roller wheels, athletic equipment
Electrical Applications: Insulation materials and cable sheathing
Transportation: Bicycle tires and automotive components
Plastics Industry: ABS/AS toughening agent, PS impact modifier

Quality Standards

All HSR products comply with ASTM International Standards and international quality specifications. Each batch undergoes rigorous quality control testing to ensure consistent performance and reliability.

Packaging & Storage

Packaging: Kraft paper bags, 20 kg/bag
Storage: Store in cool, dry, well-ventilated areas
Shelf Life: 8 months from production date under proper storage conditions
Handling: Keep away from heat, sunlight, moisture, and oxidizing agents

Request Quote

For detailed specifications, pricing, and availability of High Styrene Rubber (HSR), please contact our sales team.