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    • 4. 发明授权
    • Monovinylidene aromatic polymers comprising sulfanylsilane functionalized elastomeric polymers
    • 包含硫烷基硅烷官能化的弹性体聚合物的单亚乙烯基芳族聚合物
    • US08048960B2
    • 2011-11-01
    • US12596162
    • 2008-03-27
    • Amaia Montoya-GoniJose M. RegoEvemarie HamannSven K. H. Thiele
    • Amaia Montoya-GoniJose M. RegoEvemarie HamannSven K. H. Thiele
    • C08F8/00C08L9/00C08L25/02C08K5/00
    • C08C19/44C08F8/42C08F279/02C08F279/04C08K5/548C08L15/00C08L19/006C08L25/06C08L51/003C08L51/006C08L51/04C08L53/025C08L55/02C08L2666/24C08L2666/02C08L2666/04
    • The present invention is a rubber modified monovinylidene aromatic polymer composition where the rubber is a sulfanylsilane chain end modified elastomeric polymer. In the present invention the functionalized rubber provides sufficient grafting levels in standard graft polymerization process technologies to prepare desired rubber particle size distributions and morphologies. Across a range of rubber modified monovinylidene aromatic polymers, it has been found that the use of the modified elastomeric polymers according to the present invention can improve the combinations of resin properties, particularly clarity, surface and physical properties, including both rubber modified monovinylidene aromatic homopolymers (e.g., high impact polystyrene and copolymers (e.g., ABS). The functionalized rubbers have sulfanyl functional groups that provide an optimized reactive grafting site. This ensures that under graft polymerization conditions a monovinylidene aromatic polymer block is formed grafted to the butadiene polymer block. This is particularly desirable to enable the use of polybutadiene homopolymer rubbers which are more cost effectively used in rubber-modified monovinylidene aromatic polymers.
    • 本发明是一种橡胶改性单亚乙烯基芳族聚合物组合物,其中橡胶是硫基硅烷链端改性弹性体聚合物。 在本发明中,官能化橡胶在标准接枝聚合工艺技术中提供足够的接枝水平以制备所需的橡胶粒度分布和形态。 在一系列橡胶改性单亚乙烯基芳族聚合物中,已经发现使用根据本发明的改性弹性体聚合物可以改善树脂性能,特别是透明度,表面和物理性能的组合,包括橡胶改性的单亚乙烯基芳族均聚物 (例如,高抗冲聚苯乙烯和共聚物(例如ABS),功能化橡胶具有提供优化的反应性接枝位点的硫基官能团,这确保在接枝聚合条件下,形成接枝到丁二烯聚合物嵌段上的单亚乙烯基芳族聚合物嵌段。 特别希望使用在橡胶改性单亚乙烯基芳族聚合物中更经济有效地使用的聚丁二烯均聚物橡胶。