# Formaldehyde and Polyurethanes (MDI, TDI, polyols)

Their prices have moved together.

Source page: https://www.materialinsights.org/links/formaldehyde-and-polyurethanes-mdi-tdi-polyols/

[Formaldehyde](https://www.materialinsights.org/chemicals/formaldehyde/) (chemical) and [Polyurethanes (MDI, TDI, polyols)](https://www.materialinsights.org/chemicals/polyurethanes/) (chemical): 1 relationship.

## How they are linked

### 1. Price link: product

*Cost and price · Strong · Both ways*

Formaldehyde is reacted with aniline to make MDI, the isocyanate in rigid insulation foam. The thermosetting resins proxy moves with the basic organics proxy at 0.24 monthly and 0.74 yearly.

- **0.24** monthly change correlation
- **0.74** 12-month change correlation
- **1.55** fitted elasticity

Built from the site data on production routes, energy flows, industry value chains, input-output tables and prices.