106797-52-8Relevant articles and documents
Preparation method for 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-acetone
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Paragraph 0014; 0016; 0019; 0022; 0025, (2017/03/08)
The invention provides a preparation method for a hydroxy-ketone photoinitiator, i.e., 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-acetone. In tradition production processes, chlorine or liquid bromine is used as a halogenation reagent, and halogenation and hydrolysis are successively carried out so as to obtain a target product; however, chlorine is severely poisonous gas prone to leakage while liquid bromine is easily volatile liquid with strong toxicity and corrosivity and produces a great amount of acidic exhaust gas in the process of halogenation, which leads to production of a great amount of waste water in the process of aftertreatment. The preparation method provided by the invention avoids usage of chlorine or liquid bromine as the halogenation reagent and directly prepares the target product in one step by using a carbon tetrachloride process. The preparation method provided by the invention has the advantages that the amount of exhaust gas produced in the process of reaction is small; feeding and aftertreatment are simple to operate; the output of wastewater is low; product content reaches 99% or above; and production cost is low.
Copolymerizable photoinitiators
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, (2008/06/13)
The invention relates to copolymerizable photoinitiators of the general formula I STR1 in which R1 and R2 are each H, C1 -C6 -alkyl or phenyl, R3 is H, C1 -C6 -alkyl, C1 -C6 -alkyl, C1 -C6 -alkanoyl or the group Z, R4 is H, halogen, C1 -C12 -alkyl, C1 -C12 -alkoxy, C1 -C12 -alkylthio or the group --X[(CH2 --CH2 --O)n --Z]m and X os O, S or N n is an integer from 0 to 4, m is the integer 1 for X=O and S or the integer 1 or 2 for X=N, Z is the group --CO--CR=CR'R" with R, R', R" each being H or CH3, always at least one of the R3 or R4 groups containing the group Z.
