US12570818USUSPTO Grant XML

Reactive flame retardants for flexible polyurethane foams

The present invention provides reactive multi-functional dialkyl phosphinate compound(s), serving as highly efficient reactive flame retardants in flexible polyurethane foams. The invention further provides fire-retarded polyurethane compositions comprising said multi-functional dialkyl phosphinate compound and applications containing the same.

Patent

Brief

Patent brief

Problem

How can battery fires and thermal runaway in EV packs be prevented?

Novelty

The invention further provides fire-retarded polyurethane compositions comprising said multi-functional dialkyl phosphin...

Uses

Lithium-ion cells, EV batteries, Grid storage

Assignee

ICL-IP AMERICA INC.

Published

Mar 10, 2026

Inventors

Jeffrey Stowell, Zhihao Chen, Gerardo Francisco

Domain

Mobility / storage

Plain-English summary

Problem

How can battery fires and thermal runaway in EV packs be prevented?

Solution

provides reactive multi-functional dialkyl phosphinate compound(s), serving as highly efficient reactive flame retardants in flexible polyurethane foams.

Key novelty

The invention further provides fire-retarded polyurethane compositions comprising said multi-functional dialkyl phosphinate compound and applications containing the same.

Applications

Lithium-ion cellsEV batteriesGrid storage

Relevant search intents

flame retardant

Claims preview

1 . A multi-functional dialkyl phosphinate compound of the general formula (I): wherein each R 1 and R 2 are individually selected from an alkyl group containing from 1 to 4 carbon atoms, R is a divalent linear or branched alkyl containing up to about 4 carbon atoms, a divalent aralkyl group of from 7 to 13 carbon atoms, or a bond, X and Y are each independently a divalent aryl group containing from 6 to 12 carbon atoms, the subscripts a and b are each 0 or 1, the subscript c is an integer of from 1 to 5, and the subscript d is an integer from 1 to 26, with the provisos that: a+b= 1, when a=1, then b is 0, X is an aryl group as defined except that a hydrogen atom bonded to the aryl group is not part of the bracketed group of subscript c, and subscript c is an integer from 1 to 5 and subscript d is 1, and, when b=1, then a is 0, c is 1, and d is an integer of from 1 to 26. 2 . The multi-functional dialkyl phosphinate compound of claim 1 , wherein R 1 and R 2 are each an ethyl group. 3 . The multi-functional dialkyl phosphinate compound of claim 1 , wherein X and Y are each a divalent phenyl group and R is either a divalent methyl group or a divalent isopropyl group.

Linked approaches

Fire-resistant electrolytes

Electrolyte formulations that suppress ignition and heat release.

Related patents

Gel gasket

US12570874 • Nitto, Inc.

Solid electrolytes and methods for making the same

US12570540 • Florida State University Research Foundation, Inc.

Flame resistant battery module

US12573684 • SK On Co., Ltd.

Polymer, solid-state electrolyte, gel electrolyte, and battery

US12570773 • ZHUHAI COSMX BATTERY CO., LTD.