公开(公告)号：US20050176862A1

公开(公告)日：2005-08-11

申请号：US10657358

申请日：2003-09-08

申请人： Tod Duvall ,  Paul Adams ,  Gene Norris

发明人： Tod Duvall ,  Paul Adams ,  Gene Norris

IPC分类号： C07C319/00 ,  C07C321/00 ,  C07C323/00 ,  C08G8/28 ,  C08K5/37 ,  C08K5/55 ,  C08K5/57 ,  C08K5/58 ,  C08K5/59 ,  C08L27/00 ,  C08L101/04 ,  C08K5/36

CPC分类号： C08K5/37 ,  C08L57/08

摘要： Halogen-containing polymer compositions comprising a latent mercaptan-containing heat stabilizer composition substantially free from the offensive odor typically associated with mercaptans are protected during processing by the degradation products of the latent (i.e., blocked) mercaptan which include a free mercaptan. Other products of the degradation are believed to include carbocations of the blocking moiety which are stabilized by a molecular structure in which the electron deficiency is shared by several groups. The latent mercaptan may be the sole heat stabilizer additive but the free mercaptan released during processing may also synergize the activity of metal-based heat stabilizers such as metal salts and organometallic stabilizers such as organotin carboxylates and mercaptides in the polymer composition. The odor of primary mercaptan-containing heat stabilizers in halogenated polymer compositions is masked by a small amount of a latent mercaptan. The latent mercaptans also serve as intermediates in the preparation of anti-oxidants, anti-microbial agents, photostabilizers, and primary heat stabilizers. Highly effective heat stabilizers are prepared by the condensation of formaldehyde and a para-phenol and further condensation of the crude product with a mercapto-containing compound.

摘要翻译： 包含含有含硫醇的热稳定剂组合物的含卤素聚合物组合物通常与硫醇通常相关的令人反感的气味在加工过程中受到包含游离硫醇的潜在（即封闭的）硫醇的降解产物的保护。 认为降解的其它产物包括通过分子结构稳定的阻挡部分的碳阳离子，其中电子缺乏被几个基团共享。 潜在的硫醇可以是唯一的热稳定剂添加剂，但在加工过程中释放的游离硫醇也可以在金属基热稳定剂如金属盐和有机金属稳定剂例如聚合物组合物中的羧酸有机羧酸酯和硫醇中起作用。 卤代聚合物组合物中含一级硫醇的热稳定剂的气味被少量的潜硫酚掩蔽。 潜在的硫醇也用作制备抗氧化剂，抗微生物剂，光稳定剂和初级热稳定剂的中间体。 通过甲醛和对苯酚的缩合以及粗产物与含巯基化合物的进一步缩合来制备高效热稳定剂。