Hydroxyl value testing method of water-based composition and application of hydroxyl value testing method
The boric acid complexation method and sodium hydroxide titration method have simplified the detection of hydroxyl values of polyether and polyol compounds, solving the problems of toxic reagents and large instruments, and achieving safe, simple and efficient detection results.
CN121856468AActive Publication Date: 2026-04-14ZHEJIANG CASNOVO MATERIALS
5 Cites 0 Cited by
Patent Information
- Application Number
- CN202610323248.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-17
- Publication Date
- 2026-04-14
- Estimated Expiration
- 2046-03-17
AI Technical Summary
Technical Problem
In existing technologies, the methods for detecting the hydroxyl value of polyether and polyol compounds use toxic reagents and require large instruments, which pose environmental hazards and high testing thresholds.
Method used
The boric acid complexation method is adopted, which involves mixing an aqueous composition with boric acid, controlling the pH and reacting in a constant-temperature water bath, and titrating with sodium hydroxide. This method avoids harmful reagents and large instruments, and simplifies the detection process.
Benefits of technology
It enables non-toxic, safe, and convenient hydroxyl value detection, shortens reaction time, reduces energy consumption, improves detection efficiency, and lowers equipment requirements.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a hydroxyl value testing method of a water-based composition and application thereof, and relates to the field of chemical or physical property testing of materials, and the hydroxyl value testing method comprises the following steps: mixing the water-based composition with a solvent mixture, and stirring until the water-based composition is completely dissolved to obtain a water-based composition solution; and adding boric acid into the aqueous composition solution, controlling the pH value, carrying out a constant-temperature water bath reaction, avoiding boiling to obtain a mixture, cooling, and testing to complete the hydroxyl value test. According to the method disclosed by the invention, pyridine and imidazole are replaced by boric acid, so that the use of harmful reagents is avoided, complicated derivatization or dangerous byproducts are avoided, and the test steps are simpler and more convenient compared with the traditional method. The method not only simplifies operation steps, but also reduces energy consumption and equipment requirements.
Need to check novelty before this filing date? Find Prior Art