| 摘要 |
Gasketing paper is commonly made by the beater addition process. In the beater addition process a furnish composition is prepared by mixing latex into a fiber slurry which also typically contains one or more fillers. The beater addition process is currently being scrutinized because of environmental concerns. More specifically, conventional latices used in the beater addition process contain curatives, such as amines, sulfur, and zinc compounds, which are discharged into the environment via the affluent from the process. By practicing the process of this invention gasketing paper can be manufactured by an environmentally sound technique. In one embodiment of this invention gasketing paper is made by beater addition with the latex utilized in the process being comprised of (a) at least one rubber having both pendant blocked isocyanate groups and groups containing at least one active Zerewitinoff hydrogen, (b) at least one emulsifier, and (c) water.
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