Synthesis and chemical transformations of 6-amino-7-chloro-2-(2-hydroxyphenyl)-2H-benzo-triazole-4-carboxylic acid derivatives
摘要:
6-Amino-7-chloro-2-(2-hydroxyphenyl)-2H-benzotriazole-4-carboxylic acid and its analogs containing chlorine and nitro groups in the phenyl fragment have been synthesized. The special features of reduction and acetylation reactions with the obtained compounds have been studied. Methods have been developed for further chemical conversions which enable a large number of 2-(2-hydroxyphenyl)-2H-benzotriazole-4-carboxylic acid derivatives to be obtained, with the aim of studying the dependence of their luminescence and complex-forming properties on various functional substituents.
The present invention relates to an amine of the formula (I) which is an adduct of 1,2-propylenediamine with an aryl monoglycidyl ether, to the use thereof as part of a hardener for epoxy resins, and to epoxy resin compositions obtained therewith. The amine of the formula (I) is preparable in a simple process in high purity, is of very low viscosity and is especially suitable for the curing of epoxy resins. It allows low-emission epoxy resin compositions which have good workability and which cure even under cold and damp conditions, quickly and without blushing effects, to form very hard products of high surface quality that display virtually no yellowing on exposure to light.
An amine of formula (I) which is particularly suitable for use as a curing agent for epoxy resins. The amine of formula (I) is devoid of non-incorporable toxic phenols, and is low-viscosity and pale in colour. It allows the production of easily-workable, low-emission or emission-free epoxy resin products which cure rapidly even at relatively low ambient temperatures thus obtaining a high degree of hardness and a nice surface with hardly any yellowing. This is particularly suited to use in floor or top coatings.
Compounds of the formula
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
66
, m, n, p, and G are as defined herein.
其中R1、R2、R3、R4、R5、R6、R66、m、n、p和G的化合物如下所定义。
BIS[3-ISOPROPENYL-ALPHA,ALPHA-DIMETHYLBENZYL]CARBODIIMIDE, PRODUCTION METHODS, AND USE OF SAID COMPOUND
申请人:RHEIN CHEMIE RHEINAU GMBH
公开号:US20170088509A1
公开(公告)日:2017-03-30
The present invention relates to novel processes for producing bis[3-isopropenyl-α,α-dimethylbenzyl]carbodiimide, to the thus-produced bis[3-isopropenyl-α,α-dimethylbenzyl]carbodiimide and to the use thereof as a hydrolysis inhibitor in polyurethane (PU)-based systems, preferably thermoplastic TPU, PU adhesives, PU casting resins, PU elastomers or PU foams.
Sheet molding compounds are thickened (or maturated) via "in situ" formation of polyureas made from aromatic primary diamines with reduced basicity and diisocyanates. The molding compounds, which can optionally contain mineral fillers such as chopped glass fiber, are generally based upon unsaturated polyester resins having a high percentage of hydroxyl end groups, polymerizable vinyl compounds such as styrene, and the like. The thickened compositions are tack-free and compression moldable after less than one day, typically after less than several hours, into permanently shaped, strong rigid articles, such as automotive body parts. A viscosity plateau is reached and maintained by the maturated compounds of the present invention for extended periods of time, e.g., several weeks.