Kao has filed a patent for an inkjet ink that includes a terpene phenol resin and a carbonate ester with a boiling point below 150°C. The ink is used to create printed articles and can be applied using a thermal inkjet printhead. GlobalData’s report on Kao gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Kao, Nanoemulsion cosmetics was a key innovation area identified from patents. Kao's grant share as of September 2023 was 38%. Grant share is based on the ratio of number of grants to total number of patents.
Inkjet ink with terpene phenol resin and carbonate ester
A recently filed patent (Publication Number: US20230312952A1) describes an inkjet ink formulation that offers improved performance and drying characteristics. The inkjet ink comprises a terpene phenol resin with a hydroxyl value of 10 to 80 mgKOH/g and a carbonate ester with a boiling point below 150°C.
The terpene phenol resin used in the inkjet ink is a copolymer formed from a reaction between a monoterpene and a phenolic compound. The monoterpene can be selected from 3-carene, a-pinene, ß-pinene, and camphene. The phenolic compound used is phenol.
The terpene phenol resin has a hydroxyl value ranging from 25 to 60 mgKOH/g. It is present in the inkjet ink in an amount of 0.1 to 10 wt. %, based on the total weight of the inkjet ink. The carbonate ester, specifically dimethyl carbonate, is present in an amount of up to 50 wt. %.
The weight ratio of the carbonate ester to the terpene phenol resin is between 2:1 and 25:1. The inkjet ink may also contain ethanol, with a weight ratio of the carbonate ester to ethanol ranging from 0.05:1 to 0.80:1. Additionally, the inkjet ink may include an alkanolamine, such as ethanolamine, propanolamine, isopropanolamine, diethanolamine, or triethanolamine, in an amount of 0.1 to 10 wt. %.
To enhance the performance of the inkjet ink, a silicone acrylate copolymer can be added in an amount of up to 5 wt. %. The inkjet ink may also contain a colorant for printing purposes.
The patent also describes a printed article that includes a substrate with a dried form of the inkjet ink applied to it. Furthermore, a method of forming a printed image on a substrate is disclosed, involving the application of the inkjet ink onto the substrate using a thermal inkjet printhead and subsequent drying. The inkjet ink can be dried by exposure to air for 30 seconds or less, eliminating the need for a heater.
In summary, this patent presents an inkjet ink formulation that combines a terpene phenol resin and a carbonate ester to improve ink performance and drying characteristics. The inkjet ink can be used to create printed articles and offers a method for forming printed images on substrates using a thermal inkjet printhead.
To know more about GlobalData’s detailed insights on Kao, buy the report here.
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