1. Market Focus This Week
Cost side: Ethylene oxide feedstock prices rose during the week, providing some support on the cost side.
Supply side: Most monomer units at plants operated normally, and overall supply volume fluctuated within a narrow range.
Demand side: Downstream participants were cautious about entering the market to chase high prices and replenish inventory, opting for lower-priced purchases on a rigid-demand basis.
2. Weekly Market Analysis
Table 1: Weekly Comparison of Closing Prices in China's Polycarboxylate Superplasticizer Monomer Market
Unit: yuan/mt
| Region | Specification | 2026/9/3 | 2026/9/10 | Change | Change Rate |
|---|---|---|---|---|---|
| East China | EPEG | 9100.00 | 10110.00 | 1010.00 | 11.10% |
| HPEG | 9200.00 | 10210.00 | 1010.00 | 10.98% | |
| TPEG | 9200.00 | 10210.00 | 1010.00 | 10.98% | |
| South China | EPEG | 9090.00 | 10110.00 | 1020.00 | 11.22% |
| TPEG | 9190.00 | 10210.00 | 1020.00 | 11.10% | |
| HPEG | 9190.00 | 10210.00 | 1020.00 | 11.10% | |
| Northeast China | EPEG | 9040.00 | 10120.00 | 1080.00 | 11.95% |
| HPEG | 9040.00 | 10120.00 | 1080.00 | 11.95% | |
| TPEG | 9140.00 | 10220.00 | 1080.00 | 11.82% |
During this week (September 4–10, 2026; the same below), polycarboxylate superplasticizer monomer prices continued to rise, with on-site rigid demand following up. As of September 10, the mainstream price of EPEG polycarboxylate superplasticizer monomer in the East China market was 10,400 yuan/mt, up 1,050 yuan/mt from last week. The weekly average price of EPEG in East China, the main market, was 10,110 yuan/mt, up 1,010 yuan/mt week-on-week. Specifically:
East China market: A few units continued to operate at reduced load, while most other units maintained stable operation. As the geopolitical situation remained volatile, feedstock ethylene glycol prices rose again, boosting market participants' sentiment. Ethylene oxide spot supply continued to tighten, pushing up prices. Supported by the cost side and tight spot supply of monomer in the market, monomer prices continued to rise, breaking through the highs of the first half of the year. Downstream players were cautious about chasing high prices to replenish stocks, purchasing only small spot orders to meet rigid demand.
Northeast China market: Units operated steadily, spot goods were hard to obtain, and market prices were pushed to high levels. Most producers suspended quotations, focusing on delivering previously accumulated orders. Most holders were bullish on the outlook, reluctant to sell at low prices, and trading was mainly for rigid demand.
South China market: Overall supply was stable. After the ethylene oxide feedstock price increase, monomer prices rose continuously. End users released some rigid demand, but were relatively cautious about purchasing at high prices, with inquiries mainly for rigid demand.
3. Market Influencing Factors (Data)
Supply data: During this week, the capacity utilization rate of China's polycarboxylate superplasticizer monomer industry was 24.21%, up 0.49% from last week; weekly output was 27,000 mt, up 2.27% week-on-week.
Inventory data: As of Thursday, the sellable inventory rate at Chinese polycarboxylate superplasticizer monomer plants was -30.09%, down 2.26 percentage points from last week; sellable inventory volume was -57,200 mt, down 4,300 mt week-on-week.
Cost data: During this week, the weekly average cost of HPEG in East China was 9,545.6 yuan/mt, up 679 yuan/mt week-on-week; the weekly average cost of TPEG was 9,176 yuan/mt, up 504.4 yuan/mt week-on-week.
Profit data: During this week, the weekly average profit of HPEG in East China was 664.4 yuan/mt, up 331 yuan/mt from last week; the weekly average profit of TPEG was 1,034 yuan/mt, up 505.6 yuan/mt from last week.
4. Market Forecast for Next Week
Supply forecast: Monomer producers' unit loads may fluctuate within a narrow range, with overall operating rates remaining low.
Demand forecast: Downstream players have rigid demand but are cautious about replenishing high-priced feedstock.
Cost forecast: Ethylene oxide prices may be expected to rise in the short term, potentially providing support to monomer costs.
Overall: Next week, polycarboxylate superplasticizer monomer prices may run firm-to-strong, with market fluctuations depending more on changes in supply-demand relationships.
Supply side: Monomer producers' unit loads may adjust within a narrow range. With feedstock supply tight and no easing yet, monomer spot supply is unlikely to increase significantly. Overall operating load will likely remain low. Monomer producers will mainly steadily deliver previously accumulated orders. Insufficient supply provides bottom support to the market.
Demand side: Entering the seasonal construction peak season, inventories in the downstream superplasticizer industry have mostly been drawn down to low levels, providing stable rigid-demand support. Downstream players are cautious about chasing high prices to replenish stocks, mainly purchasing small spot orders for rigid demand. A wait-and-see atmosphere remains, and demand may be relatively stable.
Cost side: There are no signs of easing in geopolitical conflicts. MEG supply remains tight, and prices may run at high levels. Feedstock ethylene oxide market supply may not loosen. Downstream industries maintain rigid-demand consumption. The ethylene market has bullish support from both supply and demand sides, and prices continue to rise. In the short term, EO market fundamentals are expected to be supported, with upward expectations.
For more weekly market analysis, please see Chempricehub Information's Polycarboxylate Superplasticizer Monomer Weekly Report.
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