Preparation and performance in paper coating of silicone-modified styrene-butyl acrylate copolymer latex

Silicone-modified styrene–butyl acrylate copolymer latex was synthesized by emulsion copolymerization by using octamethylcyclotetrasiloxane (D4), styrene, and butyl acrylate as raw materials, potassium persulfate as initiator and propylmethacrylate triethoxysilane (KH-570) as crosslinking agent. The infrared spectra studies showed that the vinyl monomers were completely copolymerized with D4. The prepared silicone-modified copolymer latex with the interpenetrating polymer networks tended to have higher stability, and better toluene and water resistance than styrene–butyl acrylate latex. The glossiness of coated paper was improved with silicone-modified copolymer latex, and it was at a maximum when D4 was about 3% of total monomers. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 333–336, 2001