Organic thiol metal-free stabilizers and plasticizers for halogen-containing polymers
申请人:Starnes Herbert William
公开号:US20050049307A1
公开(公告)日:2005-03-03
Organic thiol compounds based on pentaerythritol and dipentaerythritol are described herein. More specifically, the compounds of the present invention are mixed esters of pentaerythritol and dipentaerythritol having at least one sulfhydryl group and preferably a plurality of sulfhydryl groups as well as at least one non-thiol-containing group. The organic thiol compounds are utilized to plasticize and/or heat stabilize halogen-containing polymer compositions especially poly(vinyl chloride) compositions. The compositions are substantially free or free of metal-based stabilizers, Lewis acids and terpenes. The compounds of the present invention are ideally utilized in polymers normally susceptible to deterioration and color change which can occur during processing of the polymer or exposure of the polymer to certain environments and surprisingly also serve as excellent plasticizers.
本文描述了基于对羟基甲苯和二对羟基甲苯的有机硫醇化合物。更具体地说,本发明的化合物是对羟基甲苯和二对羟基甲苯的混合酯,具有至少一个巯基和最好是多个巯基,以及至少一个非巯基含有基团。这些有机硫醇化合物被用于增塑和/或热稳定含卤素聚合物组合物,特别是聚氯乙烯组合物。这些组合物基本上不含或不含金属基稳定剂、路易斯酸和萜类物质。本发明的化合物在通常容易恶化和变色的聚合物中得到理想应用,这种恶化和变色可能发生在聚合物加工过程中或聚合物暴露于某些环境中,并且令人惊讶地还可作为优秀的增塑剂。