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Single-end-capping reactive organosilicon

A reactive silicone, single-end capping technology, applied in the direction of film/sheet adhesive, film/sheet release liner, adhesive, etc., can solve the problems of increased raw material cost and difficult control

Active Publication Date: 2019-08-23
郝建强 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because both ends contain hydroxyl groups, it is extremely difficult to control only one end to react while the other end does not react during the reaction with methacryloxypropyltrimethoxysilane to obtain a single-end polymer.
However, although the use of silicone oil with a hydroxyl group at one end can obtain a single-capped oligomer, the cost of raw materials will greatly increase

Method used

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  • Single-end-capping reactive organosilicon
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Examples

Experimental program
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preparation example Construction

[0023] In the preparation method of the single-end capped reactive organosilicon of the present invention, the following compounds are commonly used as reaction catalysts:

[0024] Commonly used organotin compounds include: dibutyltin dilaurate, dibutyltin diacetate, dibutyltin diethylhexanoate, dibutyltin dioctoate, dibutyltin dimethylmaleate, dibutyltin maleate, dioctyltin diacetate , Dioctyltin distearate, Dioctyltin dilaurate, Dibutyltin dimethyl, Dibutyltin diphenoxy, Dibutyltin dibutylketoxime, Dibutyltin diacetylacetonate, Dibutyltin diacetoacetate, Tetravalent tin compounds such as dibutyltin bistriethoxysilicate, dioctyltin bistriethoxysilicate and reaction products of diketoxime tin oxide and silicate compounds; stannous octoate, tin naphthenate, Divalent tin compounds such as tin stearate; butyl tin or monooctyl tin compounds such as monobutyl tin trioctanoate, butbutyl tin triisopropoxide, or one or a mixture of the above-mentioned organotins.

[0025] Commonly us...

Embodiment 1

[0030] [Example 1] 100 parts by weight of hydroxyl silicone oil with a viscosity of 200mPa.s, 5 parts by weight of methacryloxypropyltrimethoxysilane, and 0.05 parts by weight of dibutyltin dilaurate are added to the 2 In the three-necked flask of the protected cooling reflux device, heat the bottom with an oil bath until the temperature in the flask is 80°C, and test the viscosity of the reaction solution every 10 minutes. Once the viscosity reaches 300mPas, add 3 parts by weight of hexamethyldisilazane immediately, and continue Heat the reaction for 1 hour until the residual hydroxyl group completely disappears (the FTIR confirms that there is no hydroxyl peak), and after the reaction is completed, the small molecule alcohol reactant is distilled off under reduced pressure to obtain a single-terminal methacryloyloxy polydicarboxylate with a viscosity of 295 mPas. Methylsiloxane.

Embodiment 2

[0031] [Example 2] 100 parts by weight of hydroxyl silicone oil with a viscosity of 500mPa.s, 4 parts by weight of acryloxypropyltrimethoxysilane, and 0.1 part by weight of bismuth octoate are added to the 2 In the three-necked flask of the protected cooling reflux device, heat it with an oil bath until the temperature in the flask is 80°C. Test the viscosity of the reaction solution every 10 minutes. Once the viscosity reaches 700mPas, add 2.5 parts by weight of hexamethyldisilazane immediately, and continue Heat the reaction for 1 hour until the residual hydroxyl group completely disappears (the FTIR confirms that there is no hydroxyl peak). After the reaction is completed, the small molecule alcohol reactant is removed by distillation under reduced pressure, and finally a polydimethylmethylene with a single-end acryloyloxy group with a viscosity of 691 mPas is obtained. base siloxane.

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Abstract

The invention discloses single-end-capping reactive organosilicon, and belongs to the field of preparation of monofunctional oligomers. A silane coupling agent containing (meth) acryloxy and hydroxylsilicone oil are heated to react under the action of a catalyst, and after a certain viscosity is reached, hexamethyldisilazane is added to remove residual hydroxyl at the other end to obtain a monofunctional polydimethylsiloxane oligomer with one end being (meth) acryloxy. The monofunctional oligomer can be easily in solution copolymerization with monomers such as (meth) acrylic acids, styrene and maleic acid without generating gel, and thus, a release agent with a good release effect is obtained.

Description

technical field [0001] The invention relates to a single-end capped reactive silicone, which belongs to the field of preparation of monofunctional oligomers. Background technique [0002] Polydimethylsiloxane has the characteristics of very good high temperature resistance, low temperature resistance and low release force. It can be used alone or copolymerized with (meth)acrylic, styrene, maleic acid and other materials to improve the high resistance of these materials. Low temperature performance. One of the important methods is to endow polydimethylsiloxane with reactivity for copolymerization with other monomers. The (meth)acryloyl end-capped modification of hydroxy silicone oil is an important way to obtain free radical polymerizability. Monomers, styrene, maleic acid and other monomers are copolymerized to obtain polymers with better comprehensive properties. [0003] However, (meth)acryloyl end-capped modification of hydroxy silicone oil can only obtain double-end-c...

Claims

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Application Information

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IPC IPC(8): C08G77/38C08G77/388C08F290/06C08F220/14C09J7/40
CPCC08F290/068C08G77/38C08G77/388C09J2451/005C09J7/401C08F220/14
Inventor 郝建强
Owner 郝建强
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