MDI and TDI Diisocyanates Antitrust Settlement, Check If You Qualify — In re, Diisocyanates Antitrust Litigation, No. 18-1001

UPDATED September 11, 2026 — Initial publication. All facts below verified against the official Court-authorized settlement website and the case’s Western District of Pennsylvania docket.

There’s a slice of $37,650,000 waiting for businesses that bought MDI or TDI chemicals between January 1, 2016 and July 29, 2026. Five companies — BASF, Covestro, Wanhua Chemical (America), Dow, and Huntsman — agreed to pay to settle claims they conspired to fix prices and choke supply. The earliest deadline to file, October 13, 2026, is about a month away.

MDI and TDI Diisocyanates Antitrust Settlement — Key Facts

Field	Detail
Settlement Amount	$2,900,000 (BASF) + $7,000,000 (Covestro) + $7,750,000 (Wanhua/WCA) + $14,000,000 (Dow) + $6,000,000 (Huntsman) = $37,650,000 combined. BASF also pays a separate $100,000 toward notice costs.
Claim Deadline	Oct 13, 2026 (Wanhua/WCA) · Oct 19, 2026 (Dow & Huntsman) · Nov 2, 2026 (BASF & Covestro)
Who Qualifies	Anyone who purchased or received MDI or TDI directly in the U.S. from Jan 1, 2016 through July 29, 2026
Estimated Payout	UNVERIFIED — no per-purchaser estimate is published; payments follow a Court-approved, pro-rata Plan of Allocation
Proof Required	Yes — a Purchase Audit Request Form exists for each defendant group if your claimed purchases are contested
Settlement Status	Proposed; awaiting final Court approval
Court & Case Number	U.S. District Court, Western District of Pennsylvania — Master Docket Misc. No. 18-1001, MDL No. 2862
Law Alleged	Sherman Antitrust Act, 15 U.S.C. §§ 1, 3
Administrator	Kroll Settlement Administration LLC
Official Claim Site	diisocyanatesantitrustlitigation.com
Last Updated	September 11, 2026

Who Are BASF, Covestro, Dow, Huntsman, and Wanhua — and Why Are They Being Sued for Price-Fixing?

These five companies are among the largest global producers of MDI and TDI, the chemical building blocks of polyurethane foam and rigid insulation. That concentration matters. When a handful of manufacturers control most of a commodity’s global capacity, a coordinated plant shutdown by any one of them moves the whole market’s price. Plaintiffs say that’s exactly what happened here.

What Did the Diisocyanates Defendants Do to Buyers Between 2016 and 2026?

Purchasers allege the companies ran a conspiracy — in violation of the Sherman Antitrust Act, a federal law banning agreements between competitors to control prices or output — to inflate what buyers paid for MDI and TDI. The court’s own filings describe an arrangement built on coordinated plant shutdowns worldwide, paired with matching price increases across the group. If your business bought insulation-grade or automotive-grade polyurethane inputs during that decade, you likely paid more than a competitive market would have charged.

This isn’t the industry’s first brush with this exact allegation. Dow settled a separate, earlier price-fixing case over the same two chemicals back in 2016 — for $835 million, covering purchases going back to 1999. This new settlement covers a different, later class period. That contrast tells you something: the alleged conduct here draws a much smaller fund, which is worth knowing before you decide whether filing a claim is worth your time.

Who Qualifies for the MDI/TDI Diisocyanates Antitrust Settlement?

Here’s exactly how to know if this case includes your business.

• Companies that bought MDI or TDI directly from any Settling Defendant between January 1, 2016 and July 29, 2026
• Businesses that received the Products through a controlled subsidiary, agent, affiliate, or joint venture of a Defendant
• Direct purchasers from Covestro AG, Wanhua Chemical Group, Mitsui Chemicals, or MCNS Polyurethanes, all named in the class definition
• Government entities and the named defendants themselves are excluded, along with judicial officers assigned to the case and their families

MDI and TDI Diisocyanates Purchasers Outside Pennsylvania — Are You Still Covered?

Yes. This is a nationwide class. It covers purchasers anywhere in the United States, its territories, and the District of Columbia — the case being heard in Pennsylvania has no bearing on where your business is located.

Not sure if you qualify for the diisocyanates antitrust settlement? A free consultation with a class action antitrust attorney can help you sort out indirect versus direct purchases before the earliest October 13 deadline.

How Much Can Diisocyanates Antitrust Class Members Get? Up to $37,650,000 Combined

Nobody gets a flat check. The combined fund covers Court-approved attorneys’ fees, litigation costs, service awards, and then payments to class members — split according to a pro-rata formula. More valid claims filed against a fixed fund means smaller individual checks; fewer claims means larger ones.

What Pro-Rata Means for Your Payout

Your share depends on how much MDI or TDI your business bought during the class period relative to everyone else who files. There’s no published minimum or maximum per-purchaser figure yet.

Payments are expected by check or electronic transfer once the settlements receive final approval and any appeal period runs. Payments over $600 may appear on a 1099. Check with a tax professional about how a settlement payment affects your filing.

That $37.65 million doesn’t move until the Fairness Hearing clears it — mark December 7, 2026 if you want to track the case’s final step.

How to File Your Diisocyanates Settlement Claim — Step by Step

1. Go to diisocyanatesantitrustlitigation.com and open the Submit Claim form
2. Enter your business name, contact details, and purchase information for the relevant defendant group(s)
3. Identify which Products (MDI, TDI, or both) and which Settling Defendants you bought from
4. If your purchase records are contested, complete the Purchase Audit Request Form for that defendant group
5. Submit the form and save your confirmation number
6. Watch your email — the administrator, Kroll, will reach out if anything more is needed

Takes about 15 minutes if your purchase records are on hand.

⚠️ 32 days left for the Wanhua claim group — file now at diisocyanatesantitrustlitigation.com.

Should Diisocyanates Class Members Opt Out or Object Before Their Deadline?

What Opting Out Actually Means

Opting out means you get no payment from this settlement, but you keep your right to sue BASF, Covestro, Wanhua, Dow, or Huntsman separately over the same conduct. Most businesses shouldn’t opt out without talking to a lawyer first. The opt-out deadline matches your group’s claim deadline — October 13, October 19, or November 2, 2026.

How to Object to the Diisocyanates Settlement

You can stay in the class and still tell the Court you disagree with its terms. Objections go through the Court overseeing MDL No. 2862 in the Western District of Pennsylvania, in the format the Long Form Notice for your defendant group specifies.

Talk to a class action lawsuit attorney before your group’s deadline if you’re weighing either option — once it passes, both doors close.

MDI and TDI Diisocyanates Settlement — Key Dates, 2026

Milestone	Date
Settlement Proposed	UNVERIFIED — exact preliminary approval dates are filed separately per defendant group and not stated on the public notice page
Claims Period Opens	UNVERIFIED — not explicitly dated on the settlement site
Claim Filing Deadline	Oct 13 (WCA) / Oct 19 (Dow & Huntsman) / Nov 2 (BASF & Covestro), 2026
Opt-Out Deadline	Same as Claim Filing Deadline, by group
Objection Deadline	Same as Claim Filing Deadline, by group
Final Approval Hearing	December 7, 2026
Expected Payment Date	UNVERIFIED — follows final approval and any appeals

Diisocyanates MDI/TDI Antitrust Settlement — Frequently Asked Questions, No. 18-1001

Do I need a lawyer to file a diisocyanates settlement claim? 

No. The claim form at diisocyanatesantitrustlitigation.com is designed for self-filing. A consumer rights lawyer becomes more useful if your purchase records are disputed or you’re weighing opting out.

Is the MDI/TDI diisocyanates settlement legitimate? 

Yes. It’s court-authorized under MDL No. 2862 in the Western District of Pennsylvania and run by Kroll Settlement Administration, a court-approved administrator — not a private collections outfit.

When will diisocyanates settlement payments be sent? 

Not yet scheduled. Payments follow the December 7, 2026 Fairness Hearing and depend on whether any party appeals the Court’s approval.

What if I missed the diisocyanates claim deadline?

 Contact the administrator immediately at (833) 930-0157. Late claims aren’t guaranteed but are sometimes accepted before funds are distributed — don’t assume you’re out of options without asking.

Will my diisocyanates settlement payment go on a 1099?

 Possibly. Payments over $600 may be reported. Confirm the tax treatment with your accountant before you file.

Why are there three different deadlines for one settlement? 

Because BASF, Covestro, Wanhua, Dow, and Huntsman reached separate settlement agreements at different times. Each has its own Preliminary Approval Order and notice deadline, even though one claim form covers all of them.

What if my company bought MDI or TDI through a distributor?

 The published class definition covers direct purchases, including those made through a Defendant’s controlled subsidiary, agent, affiliate, or joint venture. If you bought through an independent distributor, UNVERIFIED — the notice does not address independent third-party resellers directly, so a legal consultation is worth it before you file or opt out.

Can I still sue Dow, BASF, Covestro, Wanhua, or Huntsman separately? 

Only if you exclude yourself from the settlement by your group’s deadline. Filing a claim and staying in the class releases your right to sue these defendants over the same allegations.

Sources Used in This Diisocyanates Antitrust Article

• Official Settlement Website — In re: Diisocyanates Antitrust Litigation, accessed September 11, 2026: https://www.diisocyanatesantitrustlitigation.com/
• Case Documents Page (Settlement Agreements, Preliminary Approval Orders, Long Form Notices): https://www.diisocyanatesantitrustlitigation.com/documents
• Claim Form — Kroll Settlement Administration: https://forms.ksacms.com/efiling/fr/eform/diisocyanatesantitrustlitigation_claimform/new?form-version=1
• U.S. District Court, W.D. Pa. — Memorandum Opinion, In re: Diisocyanates Antitrust Litigation, Master Docket Misc. No. 18-1001, MDL No. 2862 (personal jurisdiction ruling citing Sherman Act §§ 1, 3 allegations): https://www.lit-antitrust.aoshearman.com/siteFiles/53120/DIISOCYANATES%20ANTITRUST%20LITIGATION.pdf
• U.S. District Court for the Western District of Pennsylvania — MDL 2862 docket page, confirming presiding judge and master docket number: https://www.pawd.uscourts.gov/node/593

Researched and written by Israr Ahmad, legal content researcher and founder of AllAboutLawyer.com. All facts verified against the official Court-authorized settlement website, the settlement’s posted case documents, and the Western District of Pennsylvania’s MDL docket, as of September 11, 2026. Last Updated: September 11, 2026.

This article is for informational purposes only and does not constitute legal advice. Laws vary by state and individual circumstances differ. For advice about your specific situation, consult a qualified attorney.