Compagnie de Saint-Gobain has been granted a patent for a thermosetting binder composition that includes water, a water-soluble oligomeric ester of citric acid, and various saccharides. The composition features a dry matter content of 40-80% by weight and is designed for bonding mineral or organic fibers. GlobalData’s report on Compagnie de Saint-Gobain gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Compagnie de Saint-Gobain, Heater-integrated de-icing windows was a key innovation area identified from patents. Compagnie de Saint-Gobain's grant share as of July 2024 was 58%. Grant share is based on the ratio of number of grants to total number of patents.
Thermosetting binder composition for mineral or organic fibers
The granted patent US12071569B2 presents a thermosetting binder composition that primarily consists of water and a water-soluble oligomeric ester derived from citric acid and various saccharides. The saccharides include options such as erythritol, xylitol, maltitol, and hydrogenation products of starch with a dextrose equivalent (DE) ranging from 25 to 99. The composition is characterized by a dry matter content between 40% and 80%, with the oligomeric ester constituting at least 80% of this dry matter. Additionally, the formulation is designed to contain less than 10% free sorbitol by weight relative to its dry matter content, ensuring a specific balance of components for optimal performance.
Further claims detail specific parameters for the binder composition, including a saccharide/citric acid weight ratio between 25/75 and 55/45, a Brookfield viscosity of 0.25 to 4.0 Pa·s at a solids content of 70% by weight, and a pH range of 1 to 7. The patent also allows for the inclusion of an esterification catalyst and sodium hypophosphite. Notably, the composition can be refined to contain less than 5% residual free citric acid and can be tailored to feature specific saccharides, such as xylitol, while maintaining a high proportion of the oligomeric ester. These attributes suggest a versatile binder suitable for various applications, emphasizing its potential utility in industries requiring thermosetting materials.
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