A kind of preparation method of long-chain alkyl phenyl modified silicone oil

Abstract

The invention discloses a preparation method of long-chain alkyl phenyl modified silicone oil, which comprises the following steps: (1) adding a part of Karstedt catalyst to a reaction kettle; (3) drop the hydrogen-containing silicone oil into the reactor to obtain phenyl-modified silicone oil; (4) add the remaining catalyst in the stirring tank in the reactor; (5) add the α-olefin After passing through a filter column containing neutral alumina, it flows into the reactor to obtain long-chain alkyl phenyl modified silicone oil. Using Karstedt's catalyst instead of traditional chloroplatinic acid in isopropanol allows the reaction to proceed with less catalyst. At the same time, the reaction process is controlled by adding catalyst twice to prevent the product from being too dark due to too much catalyst.

Description

technical field

[0001] The invention belongs to the field of organic silicon, and in particular relates to a preparation method of long-chain alkyl phenyl modified silicone oil. Background technique

[0002] Silicone oils generally refer to linear polysiloxane products that remain liquid at room temperature. Generally divided into two categories: methyl silicone oil and modified silicone oil. The most commonly used silicone oil, all organic groups are methyl, called methyl silicone oil. The organic group can also use other organic groups to replace part of the methyl group to improve certain properties of the silicone oil and apply to various uses.

[0003] Long-chain alkyl modified silicone oil refers to the replacement of some methyl groups by long-chain carbon hydrocarbon groups in ordinary dimethyl silicone oil, and the carbon chain length of long-chain alkyl groups is in the range of 2-17. Long-chain alkyl modified silicone oil not only strengthens the silicone oil T...

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