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    • 7. 发明授权
    • Acoustic baffle with predetermined directional expansion characteristics
    • 声挡板具有预定的方向膨胀特性
    • US06319964B1
    • 2001-11-20
    • US09609305
    • 2000-06-30
    • Norman E. BlankCheong Kow
    • Norman E. BlankCheong Kow
    • C08F246
    • B29C44/18B29C44/04B62D29/002
    • Heat-expandable molded synthetic resin seal and baffle components adapted for use in automobile body cavities or the like are provided which are designed to preferentially expand upon heating in desired directions and to a desired degree, in order to properly seal irregular or special cavity shapes. The molded components of the invention have selected body surface portions thereof UV crosslinked to a depth of up to about 0.5 mm, while other portions of the molded body are not crosslinked; upon heating, the crosslinked portions expand at a slower rate and to a lesser extent than non-crosslinked body portions. The preferred synthetic resin includes a grafted anhydride polymer, a terminal epoxide polymer additive, a blowing agent, a UV photoinitiator and a UV crosslinkable resin system.
    • 提供了适用于汽车车身腔等的热膨胀性模制合成树脂密封和挡板部件,其被设计成在期望的方向上加热优先膨胀并达到期望的程度,以适当地密封不规则或特殊的腔体形状。 本发明的成型部件选择的紫外线交联的体表部分的深度达到约0.5mm,而成型体的其它部分不交联; 加热后,交联部分以比非交联体部分更慢的速度膨胀,程度较小。 优选的合成树脂包括接枝的酸酐聚合物,末端环氧化物聚合物添加剂,发泡剂,UV光引发剂和UV可交联树脂体系。