A kind of bio-based polysiloxane anti-scratch auxiliary agent and its preparation method and anti-scratch composite material
A polysiloxane, bio-based technology, applied in the field of scratch resistance additives, can solve the problems of non-renewable non-green resources and violation of green development
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[0047] The present invention provides a preparation method of the bio-based polysiloxane scratch-resistant auxiliary agent described in the above technical scheme, comprising the following steps:
[0048] (1) mix hydrogenated cardanol, basic catalyst, organic solvent and halogenated olefin, carry out substitution reaction to obtain intermediate;
[0049] (2) mixing the intermediate obtained in the step (1) with a catalyst, toluene and a low-hydrogen polysiloxane, and performing a hydrosilylation reaction to obtain the bio-based polysiloxane with the structure of the formula (I) Scratch-resistant additives;
[0050] Alternatively, the unhydrogenated cardanol is mixed with the catalyst, toluene and low-hydrogen polysiloxane, and a hydrosilylation reaction is carried out to obtain the bio-based polysiloxane scratch resistance auxiliary of the formula (II).
[0051] The present invention mixes hydrogenated cardanol, a basic catalyst, an organic solvent and a halogenated olefin, a...
Embodiment 1
[0113] (1) adding the weighed cardanol derivative 3-pentadecyl phenol (10mmol, 3.0451g) into 50mL of dehydrated alcohol solution, stirring to dissolve it to obtain the first reaction solution; with a syringe, the concentration is 3mol / L KOH solution was added to the first reaction solution at a rate of 0.2-0.5 mL / s; propenyl bromide (10 mmol, 0.86 g) solution was gradually added dropwise to the first reaction solution at a rate of 0.06-0.12 mL / s with a syringe In the solution, the second reaction solution was obtained; the second reaction solution was heated and refluxed in an oil bath, the temperature was set to 78 ° C, and the reaction was carried out for 8 h; the KBr generated in the reaction system was precipitated with ethyl acetate, filtered to obtain a filtrate, and set The temperature is 50°C for rotary evaporation, and the rotary evaporation step is repeated twice to remove KBr; the wet method is passed through the column, the eluent is proportioned according to petro...
Embodiment 2
[0124] The difference from Example 1 is that in step (1), the cardanol derivative is unhydrogenated cardanol; wherein, the unhydrogenated cardanol is a mixture, that is, four phenols with b=0, 1, 2, and 3. Composition of mixed phenols. The ratio of the amount of unhydrogenated cardanol, basic catalyst and bromopropene is 1:1:1; the obtained intermediate is a mixed olefin composed of four cardanol groups, wherein the structural formula of the cardanol group mixed olefin is as follows Formula (VII) shows:
[0125]
[0126] In the formula (VII), b=0, 1, 2, 3.
[0127] Step (2) The ratio of the amount of intermediate to chloroplatinic acid and low hydrogen-containing polysiloxane is 12:5.80×10 -7 : 12. The rest of the operation steps are the same as in Example 1.
[0128] The structural formula of the bio-based-PMHS obtained in step (2) is shown in formula (VIII):
[0129]
[0130] However, in formula (VIII), b=0, 1, 2, 3.
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