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What is styrene isoprene
**Introduction to Styrene-Isoprene (SIS)** Styrene-isoprene (SIS) is a versatile thermoplastic elastomer (TPE) composed of styrene and isoprene monomers. It combines the elasticity of rubber with the processability of plastics, making it ideal for adhesives, sealants, coatings, and flexible products. SIS offers excellent tack, flexibility, and resistance to aging and UV exposure, enhancing durability in applications like pressure-sensitive adhesives (PSAs), medical tapes, and footwear. Its ability to bond well with various substrates and maintain performance across temperatures makes it a preferred material in industries requiring high-performance, lightweight solutions. SIS is also recyclable, aligning with sustainability goals while delivering superior mechanical properties.
Preparation Process: To prepare styrene-isoprene copolymer, follow these steps: 1. **Monomer Purification**: Purify styrene and isoprene by passing through an inhibitor-removal column or distillation. 2. **Solution Preparation**: Dissolve the monomers in a non-polar solvent (e.g., cyclohexane or toluene) under inert nitrogen atmosphere. 3. **Initiator Addition**: Add an anionic initiator (e.g., *n*-butyllithium) to initiate polymerization at controlled temperatures (30–50°C). 4. **Polymerization**: Allow the reaction to proceed for several hours, ensuring complete monomer conversion. 5. **Termination & Isolation**: Quench the reaction with methanol, precipitate the polymer in excess alcohol, and dry under vacuum. Adjust ratios for desired copolymer composition.
Usage Scenarios: Styrene-isoprene copolymer is widely used in adhesives, sealants, and coatings due to its excellent elasticity, tack, and durability. It serves as a key component in pressure-sensitive adhesives (PSAs) for tapes, labels, and medical patches. The compound enhances flexibility and impact resistance in rubber products like shoe soles and automotive parts. In the construction industry, it improves the performance of bitumen modifiers for waterproofing and road paving. Additionally, styrene-isoprene is utilized in medical devices, such as surgical gloves and catheters, owing to its biocompatibility. Its thermoplastic properties make it suitable for hot-melt adhesives and molded products in packaging and consumer goods.
styrene isoprene Basic Info
styrene isoprene Price
- **United States**: $1,500 - $2,500 per metric ton
- **China**: $1,400 - $2,200 per metric ton
- **Russia**: $1,600 - $2,400 per metric ton
- **Germany**: $1,700 - $2,600 per metric ton
- **India**: $1,300 - $2,100 per metric ton
- **Japan**: $1,800 - $2,700 per metric ton
- **Brazil**: $1,500 - $2,300 per metric ton
- **South Korea**: $1,600 - $2,500 per metric ton
- **Philippines**: No results
- **United Kingdom**: $1,700 - $2,600 per metric ton
- **France**: $1,700 - $2,600 per metric ton
- **Mexico**: $1,400 - $2,200 per metric ton
- **Canada**: $1,600 - $2,500 per metric ton
- **South Africa**: No results
- **Egypt**: No results
- **Turkey**: $1,500 - $2,300 per metric ton
- **Thailand**: $1,400 - $2,200 per metric ton
- **Indonesia**: $1,300 - $2,100 per metric ton
These ranges are approximate and based on general market trends. For precise pricing, consult local suppliers or market reports.
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