Organosilicone modification of allyl methacrylate with speier’s catalyst for waterborne self-matting styrene-acrylic emulsion

• Published in: Progress in organic coatings 2018-03, Vol.116, p.1-6
• Main Authors: Xiao, Jianjun, Qiu, Zumin, Yang, Weiran, Qiu, Jumin, Yang, Tonglin, Xu, Yongdong, Zeng, Yongjian, Wang, FangChao, Li, SiKuan
• Format: Article
• Language: English
• Subjects: 1,1,1,3,5,5,5-heptamethyltrisiloxane; Acrylic resins; Allyl methacrylate; Catalysis; Catalysts; Chains; Contact angle; Copolymerization; Emulsions; Fourier transforms; Gloss; Hydrosilylation; In-situ copolymerization; Infrared spectroscopy; Self-matting film; Solventless hydrosilylation; Studies; Styrene; Styrene-acrylic emulsion; Surface water; Ultraviolet radiation; Wettability
• ISSN: 0300-9440; 1873-331X
• DOI: 10.1016/j.porgcoat.2017.12.004

[Display omitted] •Allyl methacrylate was solvent-free modified by 1,1,1,3,5,5,5-heptamethyltrisiloxane.•Modified allyl methacrylate could in-situ modify styrene-acrylic emulsion.•Waterborne self-matting styrene-acrylic emulsion was attained. In this study, we provided a solvent-free method to modify allyl methacrylate (AMA) with 1,1,1,3,5,5,5-heptamethyltrisiloxane (MDHM) through hydrosilylation reaction catalyzed by Speier’s catalyst. The results from Fourier transform infrared spectroscopy (FT-IR) and ultraviolet spectrometer (UV) clearly indicated that AMA was modified by MDHM through the hydrosilylation on the CC of isopropenyl segment with the CC of propenyl group remaining to obtain unsaturated acrylate containing organosiloxane chain segment. We also studied the application of MDHM modified AMA in waterborne self-matting styrene-acrylic emulsions through in-situ copolymerization. The surface gloss, wettability, chemical composition and morphology of the prepared emulsion coating films were investigated. The results showed that organosiloxane chain segments were successfully introduced, which made film get a fine rough surface, which increase the film surface water contact angle and help to obtain a kind of waterborne semi-gloss styrene-acrylic resin film.