Production process of high viscosity phenylmethylvinyl silicone rubber
A technology of phenylmethyl ethylene and production process, applied in the field of preparation technology of polymer compounds, can solve problems such as narrowing the molecular weight distribution of products, and achieve the effects of small radial temperature difference, improved product quality, and uniform molecular weight distribution
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Embodiment 1
[0010] Put phenylmethylcyclosiloxane, methylcyclosiloxane, vinylcyclosiloxane, and catalyst tetramethylammonium hydroxide silicon alkoxide into a high-load vacuum mixer, start stirring, and control the stirring speed at 20 rev / min, heat up to 60°C, and dehydrate for 1 hour under a vacuum of -0.095Pa. At a stirring speed of 20 rpm, a temperature of 98°C, and a vacuum of -0.09Pa, polymerize for 2.5 hours, then control the stirring rate to 6 rpm, raise the temperature to 150°C to deactivate the catalyst for 30 minutes, and then raise the temperature to Keep the above stirring rate at 180°C, remove the low boiling for 4 hours under the vacuum degree of -0.1Pa, and finally press the product out of the equipment.
[0011] The product prepared in Example 1 was tested according to the HG / T3313-2000 standard, and its volatile content was 2.56%, and its molar mass was 750,000. The polydispersity index is 2.7 and the refractive index is 1.4609.
Embodiment 2
[0013] Put phenylmethylcyclosiloxane, methylcyclosiloxane, vinylcyclosiloxane, and catalyst tetramethylammonium hydroxide silicon alkoxide into the planetary strong mixer, start stirring, and control the stirring speed at 30 rpm / min, heat up to 50°C, dehydrate for 1.5 hours under -0.09Pa vacuum degree, polymerize for 2 hours at a stirring speed of 24 rpm, 100°C, -0.085Pa vacuum degree, and then control the stirring rate to 8 RPM, raise the temperature to 150°C to deactivate the catalyst for 40 minutes, then raise the temperature to 180°C to maintain the above stirring rate, remove the low boiling for 5 hours under a vacuum of -0.097Pa, and finally press the product out of the equipment.
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