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    • 70. 发明申请
    • THERMOPLASTIC FOAM WITH CONCOMITANT EXPANSION AND CURING
    • 伴随膨胀和固化的热塑性泡沫
    • WO2018060132A1
    • 2018-04-05
    • PCT/EP2017/074211
    • 2017-09-25
    • SIKA TECHNOLOGY AG
    • PARIPOVIC, Dusko
    • C08J9/00C08J9/10C08K5/23C08L23/08C08J9/02
    • Disclosed is a thermally expandable composition, comprising between 20 and 85 wt.-% of least one thermoplastic polymer P cross-linkable by radical reaction, between 2 and 15 wt.-% of at least one azo radical initiator I, optionally up to 25 wt.-% of at least one adhesion promoter AD, up to 10 wt.-% of at least one tackifier T, up to 2.5 wt.-% of at least one antioxidant AO, and up to 2.5 wt.-% of at least one polyacrylate AC, having a molecular weight of less than 2'500 g/mol, wherein all individual amounts are based on the total composition before expansion. The thermally expandable composition is free of commonly used blowing agents such as azodicarbonamide, but shows excellent properties in terms of expansion stability over a wide temperature range between 120 °C and 200 °C and is especially suitable for baffle and/or reinforcement elements, e.g. in automotive manufacturing.
    • 公开了一种可热膨胀的组合物,其包含20至85重量%的至少一种可通过自由基反应交联的热塑性聚合物P,2至15重量%的至少一种偶氮 自由基引发剂I,任选至多25重量%的至少一种粘合促进剂AD,至多10重量%的至少一种增粘剂T,至多2.5重量%的至少一种抗氧化剂AO,和 至2.5重量%的至少一种分子量小于2,500克/摩尔的聚丙烯酸酯AC,其中所有单独的量基于膨胀前的总组合物。 该可热膨胀的组合物不含通常使用的发泡剂如偶氮二甲酰胺,但是在120℃和200℃之间的宽温度范围内的膨胀稳定性方面显示出优异的性能,并且特别适用于挡板和/或增强元件 ,例如 在汽车制造业。