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Study on the Modification of the PVAc Used in Automobile Filter Paper

REN Ji-chun, SHI Shu-lan, BI You-tai, LI Jing, HUANG Yong-xing (l. Tianjin University of Light Industry, Tianjin 300222; 2. Paper Making Technological Research Institute of Light Industry Tianjin 300141)  
The modification methods of the polyvinyl acetate emulsion used in automobile filter paper are synthesized. Adding MA and MMA successfully solved the problem of PVAc emulsion's poor waterproof property. And automobile filter paper impregnated with the modified PVAc emulsion can reach a satisfied stiffness.
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