Hallmark Cards has been granted a patent for a moldable eraser kit that includes two silicone polymers, an abrasive agent, and a catalyst. The eraser is made by mixing the polymers, catalyst, and abrasive agent, molding the mixture, and curing it at room temperature. The eraser is free of polyvinyl chloride and is contained in separate containers. GlobalData’s report on Hallmark Cards gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Hallmark Cards, intelligent toy robots was a key innovation area identified from patents. Hallmark Cards's grant share as of September 2023 was 65%. Grant share is based on the ratio of number of grants to total number of patents.
A recently granted patent (Publication Number: US11746235B2) describes a moldable eraser kit that offers a unique and versatile solution for erasing pencil marks. The kit includes a first silicone polymer, a second silicone polymer (which contains an alkenyl-functional organopolysiloxane), an abrasive agent, and a catalyst. Importantly, the moldable eraser made using this kit is free of polyvinyl chloride.
The kit is designed to provide users with the ability to mold and shape their own erasers according to their preferences. It consists of at least two containers, with the first container containing the first silicone polymer and optionally the abrasive agent, and the second container containing the second silicone polymer and optionally the abrasive agent. The catalyst may be present in either or both of these containers, or in a separate third container.
The viscosity of the contents in each container ranges from 0.5 cSt to 10,000,000 cSt, ensuring ease of use and manipulation. Additionally, the kit may include tools for molding, sculpting, stamping, and patterning the eraser.
Various additives can be included in the kit, such as fillers, colorants (including dyes and pigments), glitter, color developers, preservatives, and fragrances. The colorants can be thermochromic, photoluminescent, pH-reactive, photochromic, or non-reactive and resistant to chemical attacks. The abrasive agent can be selected from a range of materials including pumice, calcium carbonate, clay, carborundum, and silica.
The catalyst in the kit facilitates a reaction between the first and second silicone polymers at room temperature, with a curing time ranging from 30 seconds to 60 minutes. This allows for quick and convenient eraser production.
The patent also describes a method for making a molded eraser using the kit. The method involves mixing the silicone polymers, catalyst, abrasive agent, and optional additives to form a mixture, molding the mixture into a desired shape, and curing it at room temperature to create a molded eraser.
Overall, this moldable eraser kit offers a customizable and user-friendly solution for erasing pencil marks. Its composition and versatility make it a valuable tool for artists, students, and anyone in need of an eraser that can be tailored to their specific needs.