Amic acids of alphamethyl styrene and maleic-anhydride copolymer as a dispersing agent

✍ Scribed by M. A. Shenoy; Kusum S. Joshi

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 122 KB
• Volume: 75
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(20000118)75:3<424::aid-app12>3.0.co;2-1

✦ Synopsis

Alphamethyl styrene (AMS) and maleic anhydride (MAn) were copolymerized in 2-butanone using benzoyl peroxide as initiator. Low molecular weight (8000) of alphamethyl styrene-maleic anhydride copolymer was prepared using AMS dimer as a chain-transfer agent. This copolymer was then treated with two different amines, such as dibutylamine and diethanolamine, having different hydrophilicity, to obtain the corresponding amic acids. Application of these amic acids as a dispersing agent to disperse titanium dioxide (TiO 2 ) in water was studied. The Daniel Flow point method was used to assess the dispersing ability of these amic acids, and diethanolamic acid was found to show the better dispersing property.