Polysiloxane composition and application thereof
A technology of polysiloxane and hydrogen polysiloxane, applied in the field of polysiloxane composition
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[0040] The preparation method of vinyl polysiloxane:
[0041] Formula I-1 It can be synthesized by the following steps:
[0042] (1) Take 0.5g of platinum as a hydrosilylation catalyst, add 5mL of toluene to dilute, and then add it to a 250mL three-necked flask;
[0043] (2) Take 2.49g 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-triketone (1,3,5-Triallyl-1 ,3,5-triazine-2,4,6(1H,3H,5H)-trione, molecular weight MW=249.27g / mol), add 20mL of toluene to dilute and add to the three-necked flask;
[0044] (3) Take 28.56g compound containing silicon-hydrogen bond Add 25mL of toluene to dilute and add to the three-necked flask;
[0045] (4) Set the oil bath temperature to 130°C, turn on the stirring, turn on the condensed water, and when the temperature in the three-necked flask is 119°C, the reaction mixture begins to reflux;
[0046] (5) After refluxing for a period of time, draw a small amount of the reaction mixture for IR testing to determine whether the reaction is comp...
Embodiment 1
[0064] The polysiloxane composition of the present embodiment consists of the following:
[0065] 45 parts vinyl polysiloxane;
[0066] 5 parts gas silicon 1, 5 parts gas silicon 2;
[0067] 10 parts of double-ended hydrogen-containing polysiloxane, 5 parts of side-chain hydrogen-containing silicone oil;
[0068] 10 parts of methylphenyl polysiloxane;
[0069] 3 parts talcum powder;
[0070] 0.5 parts platinum catalyst;
[0071] 1 Inhibitor;
[0072] 0.6 parts curing accelerator.
[0073] Wherein, the preparation technology of above-mentioned composition is as follows:
[0074] (1) In parts by weight, first weigh vinyl polysiloxane, hydrogen-containing silane polymer 1, methylphenyl polysiloxane, and acetylenic alcohol inhibitors into the reactor, and vacuumize to maintain a pressure difference ≥ 0.08MPa, at a temperature of 50°C, stir continuously for 15 minutes;
[0075] (2) Add hydrogen-containing silane polymer 2 on the basis of (1), add in batches, mix for 5 minut...
Embodiment 2
[0080] The polysiloxane composition of the present embodiment consists of the following:
[0081] 50 parts vinyl polysiloxane;
[0082] 10 parts gas silicon 1, 5 parts gas silicon 2;
[0083] 10 parts of double-ended hydrogen-containing polysiloxane, 10 parts of side-chain hydrogen-containing silicone oil;
[0084] 20 parts of methylphenyl polysiloxane;
[0085] 3 parts talcum powder;
[0086] 0.5 parts platinum catalyst;
[0087] 1 Inhibitor;
[0088] 0.6 parts curing accelerator.
[0089] Wherein, the preparation technology of above-mentioned composition is as follows:
[0090] (1) In parts by weight, first weigh vinyl polysiloxane, hydrogen-containing silane polymer 1, methylphenyl polysiloxane, and acetylenic alcohol inhibitors into the reactor, and vacuumize to maintain a pressure difference ≥ 0.08MPa, at a temperature of 50°C, stir continuously for 15 minutes;
[0091] (2) Add hydrogen-containing silane polymer 2 on the basis of (1), add in batches, mix for 5 min...
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