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    • 4. 发明授权
    • Aldehyde emission reduction for dibenzylidene sorbitol clarified plastics
    • 二亚苄基山梨醇澄清塑料的醛减排
    • US06518339B1
    • 2003-02-11
    • US09663901
    • 2000-09-18
    • Shawn R. SheppardJohn G. Lever
    • Shawn R. SheppardJohn G. Lever
    • C08K525
    • C08K5/25C08K5/1575C08K5/24C08L23/10
    • An additive that is used in conjunction with certain dibenzylidene sorbitol-type (DBS) clarifiers and acid scavengers within polyolefin resins to reduce the release of aldehydes from polypropylene material is disclosed. Hydrazides have been shown to be effective at removing residual aldehyde from polyolefins, such as polypropylene. This function can be accomplished with a minimal impact on optical transparent properties imparted to the polypropylene by the clarifying agent. The net effect is an improvement in the organoleptic performance of resins containing clarifiers, and a reduction in the UV-absorbing extractables. Particularly, adipic dihydrazide, when co-compounded into polypropylene homopolymer with 4-methyl DBS, improves the organoleptic performance of the clarifier. Incorporation of dihydrazides into polypropylene pellets reduced air-released aldehyde by nearly 100%.
    • 公开了与聚烯烃树脂中的某些二亚苄基山梨醇型(DBS)澄清剂和酸清除剂结合使用以减少聚丙烯材料中醛的释放的添加剂。 已经证明,酰肼有效地从聚烯烃如聚丙烯中除去残余的醛。 该功能可以通过对澄清剂赋予聚丙烯的光学透明性的影响最小化来实现。 净效果是含有澄清剂的树脂的感官性能的改善,以及UV吸收可提取物的减少。 特别地,当与4-甲基DBS共混于聚丙烯均聚物时,己二酸二酰肼改善澄清器的感官性能。 将二酰肼引入聚丙烯颗粒中将空气释放的醛减少近100%。