N-Alkenyl substituted hydroxylamines of formula I ##STR1## where R.sub.1 and R.sub.2 are independently hydrogen, alkyl, aryl or phenylalkyl, and R.sub.3 to R.sub.7 are independently hydrogen, alkyl or substituted alkyl are very effective process stabilizers for polymeric systems providing melt flow stabilization and resistance to discoloration during processing at elevated temperatures as well as effective stabilizers for lubricant compositions.
O-Alkenyl substituted hydroxylamines of formula I ##STR1## where R.sub.1 and R.sub.2 are independently hydrogen, alkyl, alkenyl, aryl or phenylalkyl, and R.sub.3 to R.sub.7 are independently hydrogen, alkyl or substituted alkyl are very effective process stabilizers for polymeric systems providing melt flow stabilization and resistance to discoloration during processing at elevated temperatures as well as effective stabilizers for lubricant compositions.
Mouldable compositions comprising a metallic powder or a combination thereof with ceramic powder, mixed with an organic binder are disclosed, at least a part of which binder comprises a synthetic resin component (A) having a heat deformation temperature of 130°C or higher. The component A may be used in combination with another component (B) having a melting point of 30°C - 100°C, with or without another thermoplastic component (C), having a heat deformation temperature of 130°C or less. Mouldable compositions, comprising metallic and/or ceramic powder mixed with an organic binder comprising a secondary or tertiary amine (D), or a combination thereof with a thermoplastic resin (E), are also disclosed.
Compounds of formula I
wherein X is a group of formula Ia or Ib,
R₁ and R₂ are independently e.g. hydrogen, alkyl, alkenyl, aryl or phenylalkyl, and R₃ to R₇ are independently e.g. hydrogen, alkyl or substituted alkyl are very effective process stabilizers for polymeric systems providing melt flow stabilization and resistance to discoloration during processing at elevated temperatures as well as effective stabilizers for lubricant compositions.
式 I 的化合物
其中 X 是式 Ia 或 Ib 的基团、
R₁ 和 R₂ 独立地为氢、烷基、烯基、芳基或苯基烷基,以及 R₃ 至 R₇ 独立地为氢、烷基或取代烷基,是非常有效的聚合物体系加工稳定剂,可在高温加工过程中提供熔体流动稳定和抗变色性能,同时也是润滑剂组合物的有效稳定剂。
Radioactive fluorine labeling precursor compound and method for manufacturing radioactive fluorine labeled compound using the same
申请人:NIHON MEDI-PHYSICS CO., LTD.
公开号:US10081620B2
公开(公告)日:2018-09-25
There is provided a labeling precursor compound represented by the following general formula (2):
wherein R1 represents an alkynyl group, an alkynyloxy group, an azide group, an azidoalkyl group, an arylazide group, a monocyclic or condensed polycyclic aryl group or a nitrogen-containing heterocycle; R2 and R3 each independently represent an alkyl group or a hydroxyalkyl group which hydroxy group may be protected with a protecting group, and n is an integer of 1 or 2; R6 represents an alkyl group or —CONR11R12 wherein R11 and R12 each independently represent an alkyl group or a monocyclic or condensed polycyclic aryl group; and R4, R5, R7 and R8 each independently represent a hydrogen atom, an alkyl group or an alkoxy group.