15667-10-4

Usage

Uses

Polymerization initiator

InChI:InChI=1/C16H32O4/c1-7-14(3,4)17-19-16(12-10-9-11-13-16)20-18-15(5,6)8-2/h7-13H2,1-6H3

Upstream product

• 67-56-1 methanol 
• 3425-61-4 tert-amyl hydroperoxide 
• 108-94-1 cyclohexanone 
• 933-40-4 cycloxexanone dimethyl ketal 

Downstream Products

• 75-85-4 tert-Amyl alcohol 
• 67-64-1 acetone 

Relevant academic research and scientific papers

COMPOSITION BASED ON ALLYLIC MONOMERS AND PEROXIDE(S) FOR THE MANUFACTURE OF ORGANIC GLASSES

The present invention relates to the use of one or more specific organic peroxides for the polymerization of an allylic monomer and/or at least one allylic copolymer. The invention also relates to a composition comprising at least one allylic monomer and/or at least one allylic copolymer and at least one specific organic peroxide. The invention also relates to the use of the composition as defined above for the manufacture of an organic glass, preferably an ophthalmic lens, possibly optionally being tinted by means of pigments and/or organic dyes.

Substituent Effects of Alkyl Groups on the Decomposition of tert-Alkyl Peroxides

In order to clarify substituent effects of alkyl groups on the decomposition of various tert-alkyl peroxides (RCMe2OOR'), the decomposition of 1-methoxy-1-(tert-alkylperoxy)cyclohexanes 3 and 1,1-bis(tert-alkylperoxy)cyclohexanes 4 has been studied by use of methods of kinetics and product analysis in cumene with the range of temperatures from 80-110 deg C and compared with those of the corresponding peroxyesters (1; R' = CO-t-Bu) and dialkyl peroxides (2; R' = t-Bu).The decomposition rates for each peroxide series decrease in the following order: 1 >> 3 > 4 >> 2.The decomposition rate for the series of peroxides 1 decreases in the following order: R = t-BuCH2 >> i-Pr >> Et > Pr > Me.But, for the series of peroxides 2, 3, and 4, R = t-BuCH2 >> i-Pr >> Pr > Et >> Me.The decompositon rate is expressed by a modified Taft equation : log kd = ρ*ΣρCH2R* + nh + C, which contains both inductive and C-H hyperconjugation effects of alkyl groups.On the basis of the isokinetic relationship of the activation parameters, the Taft equation, and the decomposition products, the decomposition mechanism via an polar activation complex having a slightly stretched Cα - Cβ bond neighboring to the peroxy oxygen atom is suggested and the abnormal behavior of neopentyl group is discussed.