Inhibitors of hydrosilylation reactions and their use in coating methods
A coating method and inhibitor technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Satisfactory solution, reduce coating rate and other issues, achieve high stability effect
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Embodiment 1
[0120] Example 1: Inhibitor (D1.I1): 1-ethynyl-1-cyclohexanol (ECH)
[0121] Compositions were prepared from the ingredients listed in Table 1 below:
[0122] Table 1
[0123]
[0124] Table 2
[0125]
[0126] Operating mode:
[0127] Inhibitor ECH (D1.I1) was pre-added to vinylated polydimethylsiloxane oil (A.1). After the homogenization of the mixture, the polymethylhydridosiloxane oil (B.1) is then introduced, then the acid to be tested, except for the composition (C-2), and finally the catalyst (C). A sample of each composition was extracted and analyzed by DSC ("Differential Scanning Calorimetry", METLER type device). Analyzes were performed in aluminum dishes and using a temperature ramp of 25-250°C with a gradient of 10°C / min. The time required for crosslinking at ambient temperature and the duration of bath application (durée de vie) were also measured.
[0128] Thermal profiles, characteristic data for exothermic peaks (T°C onset, T°C peak and T°C end...
Embodiment 2
[0136] Example 2: Inhibitor (D1.I1): 1-ethynyl-1-cyclohexanol (ECH)
[0137] Compositions were prepared from the ingredients listed in Table 4 below, and the same mode of operation as in Example 1 was followed.
[0138] Table 4
[0139]
[0140] Molar ratio [H / vinyl]=1.8
[0141] Samples of each composition were taken and analyzed by DSC (“Differential Scanning Calorimetry”, METLER type equipment). Analysis was performed in aluminum dishes and using a temperature ramp of 30-200°C with a gradient of 10°C / min. The time required for crosslinking at ambient temperature and the duration of bath application at 25°C and 40°C were also measured.
[0142] The heat profile, characteristic data of the exothermic peak (T°C onset, T°C peak and T°C end) and bath application duration are shown in Table 5 below.
[0143] Table 5: Results of DSC analysis
[0144]
[0145] It can be seen that the duration of potency at 25° C. and 40° C. corresponding to the addition of an acid with...
Embodiment 3
[0148] Example 3: Inhibitor (D1.I3) 2-methyl-3-butyn-2-ol (MBT)
[0149] Compositions were prepared from the components listed in Table 6 below:
[0150] Table 6
[0151]
[0152] The composition was prepared according to the mode of operation described in Example 1.
[0153] The heat profile, characteristic data of the exothermic peak (T°C onset, T°C peak and T°C end) and bath application duration are shown in Table 7 below.
[0154] Table 7: Results of DSC analysis
[0155]
[0156] With the compositions (I-7)-(I-9) according to the invention, we do obtain a reduction of the inhibition release temperature (acceleration of the crosslinking rate) without deteriorating the bath application duration at 25°C.
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