Seven Group has been granted a patent for a polyurethane foam that includes 50-80% inorganic particulate filler, specifically calcium carbonate, with a multimodal particle size distribution. The foam exhibits a density of 10-35 lb/ft³ and a flexural strength of 400-1400 psi, manufactured without surfactants. GlobalData’s report on Seven Group gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Seven Group, was a key innovation area identified from patents. Seven Group's grant share as of July 2024 was 70%. Grant share is based on the ratio of number of grants to total number of patents.
Filled polyurethane foam with specific particle size distribution
The granted patent US12024583B2 describes a filled polyurethane foam that incorporates a significant proportion of inorganic particulate filler, specifically calcium carbonate, which constitutes 50% to 80% by weight of the foam. This filler is characterized by a multimodal particle size distribution, featuring at least two distinct modes: one with a median particle diameter ranging from 45 to 100 microns, and another with a median diameter between 5 and 15 microns. The resulting filled polyurethane foam exhibits notable mechanical properties, including a flexural strength between 400 psi and 1400 psi and a density ranging from 10 lb/ft³ to 35 lb/ft³. Additionally, the foam can achieve a compressive strength of 100 psi or greater and can be manufactured in thicknesses from 0.125 inch to 1 inch.
Further claims within the patent detail the inclusion of fibers, comprising 3% to 5% by weight of the foam, which can be made from various materials such as glass, polyester, polyamide, and carbon, among others. These fibers are specified to have an average aspect ratio of length to diameter ranging from 8:1 to 700:1. The patent also emphasizes the flexibility in the composition of the inorganic filler, allowing for variations in the proportions of calcium carbonate and the specific particle size distributions, while maintaining the desired mechanical properties of the filled polyurethane foam. Overall, the patent outlines a versatile material that can be tailored for various applications requiring specific strength and density characteristics.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
