Use of aromatic carboxylic acids as modifying agents for aldehyde based resins for the production of mineral wool

Modifying aldehyde-based resins with aromatic carboxylic acids improves salt tolerance and reduces formaldehyde emissions, solving operational and regulatory issues in mineral wool production.

WO2026139443A1PCT designated stage Publication Date: 2026-07-02PREFERE RESINS HLDG
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
PREFERE RESINS HLDG
Filing Date
2025-12-21
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Aldehyde-based resins face challenges with salt water tolerance and formaldehyde emissions, leading to operational issues and regulatory concerns, particularly in the production of mineral wool.

Method used

Modifying aldehyde-based resins with small quantities of aromatic carboxylic acids, such as salicylic acid, enhances salt tolerance and reduces formaldehyde emissions by altering the methylation and condensation mechanisms, introducing soluble groups that improve solubility and stability.

Benefits of technology

The modified resins exhibit improved sodium chloride tolerance and significantly lower formaldehyde emissions, addressing regulatory concerns and enhancing environmental compatibility.

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Abstract

The present invention relates to a modified aldehyde based resin with enhanced tolerance to saline process waters and to the use of said resin as a binder for non-woven fibrous materials, such as mineral wool (glass and stone fiber), wood products, coatings, abrasives, foams and in the area of refractory, foundry, and impregnation. The invention further relates to a method for the manufacture of the modified resin and the manufacture of a sizing composition comprising said modified resin for mineral wool applications. Surprisingly, aromatic carboxylic acids, particularly salicylic acid, as modification agents for an aldehyde based resin led to an improved salt water tolerance and a decrease in resin formaldehyde curing emissions.
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