Heidelberg Materials has patented a friction material for brake pads that features a hydraulic binder composition. This innovation aims to reduce storage time and includes specific requirements for the binder’s composition and fineness, enhancing its application in brake pads and industrial uses. GlobalData’s report on Heidelberg Materials gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Heidelberg Materials, Recycled waste cement additives was a key innovation area identified from patents. Heidelberg Materials's grant share as of June 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Friction material for brake pads with hydraulic binder
The granted patent US11982330B2 outlines a novel friction material composition specifically designed for brake pads. This composition includes a multicomponent brake-pad compound and a binder matrix based on a hydraulic binder. The hydraulic binder is primarily composed of common cement clinker, which consists of at least two-thirds calcium silicates, with the remainder made up of various oxides such as Al2O3, Fe2O3, MgO, and K2O. The binder's fineness is specified to range from 10,000 to 13,000 cm²/g, and it is activated by alkaline or alkaline earth metal salts, hydroxides, or oxides. Additionally, the composition incorporates materials with pozzolanic and latent hydraulic activities, contributing to the overall performance of the brake pads.
The claims further detail the proportions of the components within the friction material composition. The hydraulic binder is present in quantities ranging from 0.5% to 95% by weight, while the multicomponent brake-pad compound constitutes 30% to 97% of the total mixture. Specific components such as lubricants, abrasives, and modifiers are also quantified within the multicomponent compound. The patent emphasizes the importance of hydration reactions for hardening the binder and specifies the total water content to be between 25% and 150% by weight relative to the binder composition. The friction material composition is intended for use in brake pads and other industrial applications, highlighting its versatility and potential for improved performance in braking systems.
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