A contract signed in March fixed the price at 1,650 dollars per tonne for twelve months. By August acrylic acid had moved 38 percent and the supplier was shipping at a loss on every container. The powder still met the certificate. What changed was the surface crosslinker dose, quietly cut to protect the margin, and absorption under load fell from 24 to 19 g/g. The buyer found out when the core started leaking in the converting line, four months after the price clause had done its damage.
Acrylic acid is 55 to 70 percent of the cost of a tonne of SAP. Any fixed-price agreement longer than a quarter is a bet on that molecule, and most buyers are not in the business of making that bet.
Build the clause around a published index
Peg the price to a published acrylic acid assessment, name the publication and the specific assessment in the contract, and state the lag. A one-month lag is standard and fair: it lets the supplier buy feedstock before the price changes, and it stops a single spike from triggering an immediate repricing.
Then add a dead band. Moves under 3 to 5 percent are absorbed by the supplier and not passed through, which kills the administrative cost of monthly micro-adjustments. Outside the band, pass through the full movement rather than a fraction, so the mechanism is symmetric and both sides can predict it.
Cap, floor and reset
A cap and a floor protect both sides from the tail. A common structure is a band of plus or minus 15 percent around the base, reset quarterly against the index average rather than the spot print on a single day. Reset on the average because a single-day print can be distorted by a shutdown or a cargo cancellation, and neither reflects the cost of the tonnes you actually bought.
State what happens if the index is discontinued, which is more common than it sounds. Name a substitute and a fallback arbitration, or you will be renegotiating in the worst possible market.
The quality slide that follows a price squeeze
This is the part that never makes it into the clause and should. When a supplier is squeezed, the visible levers are price and grade. Price is fixed by the contract. Grade is not, unless you write it down. Surface crosslinker is the first thing to go, because it is a small cost line with a large effect on AUL, and a batch at 19 g/g still passes a certificate written as “min 18”.
| Clause element | What to write |
|---|---|
| Index | named acrylic acid assessment, monthly average |
| Lag | one month |
| Dead band | +/- 4%, full pass-through outside |
| Quality floor | AUL at 0.7 psi min 22 g/g, tested per lot |
Put the AUL floor in the same clause as the price, not in a separate quality annex that nobody reads at renewal. When the two live together, a cost-down conversation automatically raises the quality question, which is exactly the conversation you want to have.
A cheaper way to buy the same protection
If you cannot get an index clause, shorten the validity to a quarter and accept a slightly higher base price. A supplier who quotes a twelve-month fixed price in a volatile market is either hedging, which costs them money they will recover somewhere, or planning to change the product. Neither is a good outcome for a buyer who needs the same powder in October as in March.
The polyacrylate granule range lists AUL and CRC by grade, which gives you the numbers to put a floor under. Four lines in the agreement, written before the market moves, are worth more than a year of arguing after it has.
Da maohua
Zhengzhou Flor New Materials Co., Ltd. specializes in SAP super‑absorbent polymer products. Serving personal hygiene, agriculture & horticulture, pet supplies and other industries, we leverage supply‑chain resources to provide particle‑size selection, performance matching and customized solutions based on clients’ practical requirements.
