Copolymer Modified Polystyrene Market to Reach USD 1,692 Million by 2031 Top 10 Company Globally

Copolymer-modified polystyrene (CMPS) is a family of styrenic copolymers in which polystyrene is modified with other monomers (common commercial examples include styrene-acrylonitrile (SAN), styrene-butadiene (SBR/SBS blends), styrene-isoprene (SIS), and styrene-maleic anhydride (SMA) types) to improve toughness, thermal resistance, chemical resistance, clarity or processability and thus expand end-use potential across packaging, appliances, electronics, automotive interiors and specialist technical applications. These copolymer modifications allow formulators to tune mechanical and thermal properties while keeping polystyrenes processing economics, which makes CMPS products attractive for converters and OEMs seeking performance upgrades without a full resin change.

The Copolymer-modified polystyrene market was estimated at USD 1,193 million in 2024, estimated to reach USD 1,692 million in 2031. Unit produce estimate for CMPS is approximately 0,58 tonnes in 2024. Average selling price (ASP) of roughly USD 2,039 per ton for CMPS in 2024. The market is expected to grow at a 5,16 % CAGR through 2031 driven by demand from higher-value engineered applications and Asia demand growth.
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Latest Trends and Technological Developments
Industry headlines in 20242025 highlighted a mixture of capacity reshaping, pricing actions and product sustainability moves that directly affect CMPS supply, pricing and customer demand. On April 2024 INEOS Styrolution announced a temporary shutdown at its Sarnia styrene operations after community health complaints an event that drew attention to regional capacity disruptions and feedstock availability for styrenic copolymers. This episode illustrated how local regulatory and community pressures can affect feedstock and intermediate availability for downstream CMPS producers. In MarchDecember 2024 several leading styrenic resin producers adjusted prices and announced product and sustainability programs: Trinseo announced price actions on HIPS/SAN in Asia (March 2024) and later publicized sustainably advantaged SAN/ABS resins intended to reduce cradle-to-gate carbon footprints (product news published December 2024), demonstrating a clear industry pivot toward lower-carbon grades and recycled-content or cradle-to-gate emission disclosures. During late 2024 INEOS also signalled strategic portfolio reshaping including divestment or sale of some ABS/SAN assets in Thailand (announced December 2024), reflecting consolidation and localized reconfiguration of CMPS capacity in Asia. These capacity and product move in 20242025 are the most material recent developments shaping short-term supply/demand and longer-term strategic positioning in the CMPS arena.

Asia is the largest regional market and production base for polystyrenics and copolymer-modified styrenics, reflecting integrated petrochemical chains, strong packaging demand, a large appliances/electronics manufacturing base, and rapid vehicle electrification and interior trim demand in some countries. Asias feedstock advantage (proximate styrene producers and petrochemical complexes) and large finished-goods converter base mean producers of SAN, HIPS and other CMPS grades either operate integrated facilities in the region or maintain close supply partnerships with converters. In 2024 Asia accounted for the lions share of polystyrene consumption and a disproportionate share of new capacity announcements for engineered styrenic resins. Local demand drivers include consumer electronics (clear, dimensionally stable SAN grades), appliance housings (HIPS), and growing automotive interiors demand where higher-performance modified polystyrenes are used. Companies that can offer specialty CMPS grades with traceable sustainability credentials and reliable regional logistics are favored by Asian OEMs and converters. The existence of several large regional resin producers and recent capacity moves noted above (sales, plant restarts/closures) materially affect deliveries and regional ASPs

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Copolymer Modified Polystyrene by Type:
StyreneAcrylonitrile (SAN) Copolymer

StyreneButadieneStyrene (SBS) Copolymer

StyreneIsopreneStyrene (SIS) Copolymer

StyreneMaleic Anhydride (SMA) Copolymer

Others

Copolymer Modified Polystyrene by Application:
Electronics and Electrical

Consumer Goods

Footwear and Elastomer Goods

Automotive

Others

Global Top 10 Key Companies in the Copolymer Modified Polystyrene Market
INEOS Styrolution

SABIC

Trinseo/AmSty

BASF.

LG Chem

Versalis

HDC Hyundai EP

CHIMEI

Kingfa

Regional Insights
Southeast Asia (Indonesia, Thailand, Vietnam, the Philippines and Malaysia) is an increasingly strategic production and demand region for CMPS because of rising local manufacturing (electronics, appliances, auto parts) and proximate export corridors. Thailand and Malaysia have established petrochemical clusters that make them favorable hubs for compounding and compounding-plus-conversion operations. Investment in localized compounding and downstream modification (for example, color and impact modification, flame-retardant packages) is accelerating as OEMs prefer near-sourced, value-added resin supplies. At the same time, Southeast Asia faces constraints from higher logistic costs for feedstock imports in some islands, evolving environmental regulation on plastic use and an uneven availability of qualified local workforce for specialized compounding operations. Nevertheless, regional incentives to attract foreign direct investment into plastics processing, and the broader relocation of global supply chains toward Southeast Asia, create a multi-year growth runway for CMPS demand in the subregion. Recent asset transactions and price announcements in Asia influence investor decisions about where to site compounding capacity versus where to import finished resin.
Copolymer Modified Polystyrene by Region:
North America
Europe
China
Japan
India
South East Asia

The CMPS segment faces three structural challenges. First, feedstock volatility (styrene and acrylonitrile prices) transmits quickly into resin ASPs and compresses margins in down cycles, making contract stability and feedstock hedging essential. Second, regulatory and sustainability pressures especially circular economy rules in Europe, and emerging product stewardship and packaging regulations in parts of Asia are accelerating demand for recycled content and low-carbon resins but at the same time raising complexity and compliance costs for producers. Third, competition from alternative polymers (modified polyolefins, engineering plastics such as polycarbonate blends) and substitution pressure from lightweighting/monomaterial packaging strategies require continuous product innovation and close OEM partnerships to sustain CMPS market share. In addition, some producers face localized community and permitting risks that can lead to temporary or permanent capacity changes, as shown by recent plant incidents and subsequent strategic decisions.
Successful CMPS suppliers are those that combine reliable regional supply chains, feedstock risk management, and differentiated product sets (clarity grades, high-impact formulations, flame-retardant or low-odor grades), while demonstrating credible sustainability credentials. Vertical integration or long-term offtake contracts with styrene and acrylonitrile producers reduce feed volatility exposure. Strategic partnerships with compounders in Southeast Asia and local technical service centers in Asia help secure design-wins with OEMs in electronics and appliances. On the demand side, converters and OEMs will increasingly prize CMPS grades that can be positioned as drop-in replacements with improved mechanical performance and documented life cycle or recycled-content benefits, enabling faster adoption in regulated markets. The recent moves by major producers to offer sustainably advantaged SAN/ABS grades show that product sustainability is moving from marketing to supply-chain requirement.

Product Models
Copolymer modified polystyrene is a class of engineered polymers where styrene is combined with other monomers to enhance properties such as impact resistance, chemical stability, flexibility, and heat performance.
Styrene-Acrylonitrile (SAN) Copolymer for clarity and chemical resistance. Notable products include:
Luran® 368R by INEOS Styrolution High-clarity SAN for food containers and cosmetic packaging.
Tyril® 790 by Trinseo Heat-resistant SAN for appliances and medical devices.
Lustran® SAN 31 by INEOS Styrolution Rigid SAN for refrigerator shelves and drawers.
Tyril® 970 by Trinseo SAN grade with improved processability for injection molding.
Tyril® 740 by Trinseo SAN with high impact resistance for electronics housings.
Styrene-Butadiene-Styrene (SBS) Copolymer for elasticity and toughness. Examples include:
Kraton D1101 by Kraton Corporation General-purpose SBS for footwear soles.
Vector® 8508 by Dexco High-molecular-weight SBS for adhesive formulations.
Europrene® Sol T by Versalis SBS for thermoplastic applications in toys and seals
Finaprene® 411 by TotalEnergies SBS for asphalt modification in road construction.
Europrene® Sol TE by Versalis SBS with improved processing stability.
Styrene-Isoprene-Styrene (SIS) Copolymer for superior adhesion and flexibility. Products examples include:
Kraton D1165 by Kraton SIS for pressure-sensitive adhesives.
Vector® 4113 by Dexco SIS with high tack for packaging tapes.
Europrene® SIS 7118 by Versalis SIS for sealants and elastic films.
Kraton D1117 by Kraton SIS with improved elongation for stretchable wraps.
Vector® 4213 by Dexco SIS for diaper fastening tapes.
Styrene-Maleic Anhydride (SMA) Copolymer for heat resistance and compatibility with engineering plastics. Products examples include:
Dylark® 332 by Trinseo SMA for automotive instrument panels.
Xiran® SZ25015 by Polyscope SMA for high-heat automotive components.
Dylark® 478 by Trinseo SMA for printer cartridges and office equipment.
Xiran® SX205 by Polyscope SMA for engineering plastic blends.
Dylark® 800 by Trinseo SMA for appliance handles and trim.
Copolymer-modified polystyrene occupies an important strategic niche in global plastics: it enables performance upgrades at competitive cost and is central to many packaging, appliance and electronics value chains. The CMPS market in 2024 is sizable by any practical definition, with Asia and growingly Southeast Asia at the center of production, compounding and demand growth. Near-term dynamics will be governed by feedstock price movements, regulatory momentum on plastics and circularity, and how quickly producers can commercialize lower-carbon and recycled-content copolymer grades. Over the 20242031 horizon, modestly positive growth is likely estimated a 5.16% CAGR as higher-value applications and sustainability-driven product differentiation offset macro headwinds.

Investor Analysis
For investors, CMPS presents an attractive exposure point to mid-value specialty polymer markets that bridge commodity and engineering plastics. What to watch: feedstock integration (companies that secure low-cost styrene/acrylonitrile streams), regional compounding footprints (especially in Southeast Asia where conversion value-add is growing), and sustainability product roadmaps (recycled-content and lower carbon grades). How to act: consider companies with integrated upstream access or long-term feed contracts, compounding assets close to end markets, and R&D pipelines that target OEM requirements (flame retardancy, clarity, low emissions). Why it matters: CMPS margins can outperform generic GPPS during demand cycles for engineered plastics; sustainability-aligned products command premiums and reduce regulatory displacement risk; and Southeast Asia supply-chain moves create localized arbitrage and M&A opportunities for strategic acquirers. The combination of regional demand growth, product upgrade cycles and supply reshaping (plant closures, asset sales, price actions) creates entry points for both strategic and financial investors seeking medium-term (37 year) returns with ESG alignment.

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5 Reasons to Buy This Report
synthesizes fragmented public data into a single, evidence-anchored estimate of the CMPS market value, volume and ASP in 2024 and provides a defensible forecast to 2031 that investors and industrial strategists can use to size opportunities
aggregates the latest 20242025 commercial and regulatory events (capacity moves, price announcements and sustainability product launches) that most directly affect CMPS economics
it delivers regionally granular insight for Asia and Southeast Asia so investors can prioritize where to site compound capacity or pursue M&A.
highlights technical and commercial risk factors (feedstock volatility, regulatory pressure, substitution risk) so risk-adjusted valuation decisions are possible.
identifies the top global players and strategic moves that will shape pricing, supply and technology adoption across the CMPS value chain.
5 Key Questions Answered
What is a defensible estimate of the CMPS market size, volume and ASP in 2024 and how might they evolve to 2031?
which recent capacity and product news (with dates) matter most to short-term supply and pricing dynamics?
how do Asia and Southeast Asia differ as growth engines and where should investors focus for compounding or conversion assets?
what are the principal industry risks (feedstock, regulation, substitution) and how can producers mitigate them?
who are the leading global players and what strategic behaviors (vertical integration, sustainability product launches, asset transactions) should investors monitor?
Chapter Outline
Chapter 1: Introduces the report scope of the report, executive summary of different market segments (by region, product type, application, etc), including the market size of each market segment, future development potential, and so on. It offers a high-level view of the current state of the market and its likely evolution in the short to mid-term, and long term.
Chapter 2: key insights, key emerging trends, etc.
Chapter 3: Manufacturers competitive analysis, detailed analysis of the product manufacturers competitive landscape, price, sales and revenue market share, latest development plan, merger, and acquisition information, etc.
Chapter 4: Provides profiles of key players, introducing the basic situation of the main companies in the market in detail, including product sales, revenue, price, gross margin, product introduction, recent development, etc.
Chapter 5 & 6: Sales, revenue of the product in regional level and country level. It provides a quantitative analysis of the market size and development potential of each region and its main countries and introduces the market development, future development prospects, market space, and market size of each country in the world.
Chapter 7: Provides the analysis of various market segments by Type, covering the market size and development potential of each market segment, to help readers find the blue ocean market in different market segments.
Chapter 8: Provides the analysis of various market segments by Application, covering the market size and development potential of each market segment, to help readers find the blue ocean market in different downstream markets.
Chapter 9: Analysis of industrial chain, including the upstream and downstream of the industry.
Chapter 10: The main points and conclusions of the report.

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