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Spherical dendritic organic silicon macromolecule, preparation method thereof and application

A dendritic and silicone technology, applied in the direction of coating, etc., can solve the problem of low collision probability

Active Publication Date: 2015-08-05
国科广化(南雄)新材料研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the literatures use the crosslinking reaction between the active groups between linear polysiloxanes. Under the condition of high temperature and high speed, the collision between the active groups between linear polysiloxanes The probability will be relatively small, which leads to a large amount of silicon hydrogen in polymethyl hydrogen siloxane not participating in the reaction

Method used

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  • Spherical dendritic organic silicon macromolecule, preparation method thereof and application
  • Spherical dendritic organic silicon macromolecule, preparation method thereof and application
  • Spherical dendritic organic silicon macromolecule, preparation method thereof and application

Examples

Experimental program
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Effect test

Embodiment 1

[0080] (1) 5.14g tetravinyl cyclotetrasiloxane (D 0 ) (Tetramethyltetravinylcyclotetrasiloxane, R 1 is methyl, R 2 is vinyl), 7.09g methyldichlorosilane (A) and 0.1g Karstedt catalyst (C) were dissolved in 300mL tetrahydrofuran (B) and mixed uniformly, wherein the amount of Karstedt catalyst was passed through tetravinyl cyclotetrasiloxane The molar mass of vinyl is calculated, and the molar mass of platinum is 1×10 of vinyl -4 . Reacted for 24h under normal temperature conditions, by 1 H-NMR to monitor the reaction. Excess unreacted methyldichlorosilane and solvent were removed by rotary evaporator under reduced pressure. The catalyzer is settled by pentane, and finally the low-boiling substance is removed by vacuumizing to obtain 11.0 g of colorless oily liquid (D 1X ), productive rate 90%; The product D obtained 1X The edge of contains 8 active groups Cl, paving the way for the subsequent reaction;

[0081] (2) Add 11.0g of D 1X and 12.71g of tetramethylethylenedia...

Embodiment 2

[0084] (1) 5.14g tetravinyl cyclotetrasiloxane (D 0 ) (Tetramethyltetravinylcyclotetrasiloxane, R 1 is methyl, R 2 is vinyl), 8.07g trichlorosilane (A) and 0.1g Karstedt catalyst (C) are dissolved in 300mL tetrahydrofuran (B) and mixed uniformly, wherein the amount of Karstedt catalyst is determined by vinyl in tetravinylcyclotetrasiloxane The molar weight of platinum is calculated as the molar weight of the vinyl group is 1×10 -4 . Reacted for 24h under normal temperature conditions, by 1 H-NMR to monitor the reaction. Excess unreacted trichlorosilane and solvent were removed by rotary evaporator under reduced pressure. The catalyzer is settled by pentane, and finally the low-boiling material is removed by vacuumizing to obtain 11.9 g of colorless oily liquid (D 1X ), productive rate 90%, the product D that obtains 1X The edge contains 12 active groups Cl, paving the way for the subsequent reaction;

[0085] (2) Add 11.9g of D 1X and 20.61g of tetramethylethylenediam...

Embodiment 3

[0088] (1) 5.14g tetravinyl cyclotetrasiloxane (D 0 ) (Tetramethyltetravinylcyclotetrasiloxane, R 1 is methyl, R 2 is vinyl), 7.09g methyldichlorosilane (A) and 0.1g Karstedt catalyst (C) were dissolved in 300mL tetrahydrofuran (B) and mixed uniformly, wherein the amount of Karstedt catalyst was passed through tetravinyl cyclotetrasiloxane The molar mass of vinyl is calculated, and the molar mass of platinum is 1×10 of vinyl -3 . Reaction 72h under normal temperature condition, by 1 H-NMR to monitor the reaction. Excess unreacted methyldichlorosilane and solvent were removed by rotary evaporator under reduced pressure. The catalyzer is settled by pentane, and finally the low-boiling substance is removed by vacuumizing to obtain 11.0 g of colorless oily liquid (D 1X ), productive rate 90%; The product D obtained 1X The edge contains 8 active groups Cl, paving the way for the subsequent reaction;

[0089] (2) Add 11.0g of D 1X and 12.71g of tetramethylethylenediamine (T...

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Abstract

The invention belongs to the field of chemical synthesis, and particularly relates to a spherical dendritic organic silicon macromolecule, a preparation method thereof and an application. The structural formula of the spherical dendritic organic silicon macromolecule is indicated in a formula I. The spherical dendritic organic silicon macromolecule is synthesized by a two-step circulation method, and then the synthesized spherical dendritic organic silicon macromolecule serves as a cross-linking compensation point and is applied to a solvent-free polysiloxane compound SL. The two-step circulation method includes hydrosilylation and nucleophilic substitution. Active sites capable of diverging are led into annular siloxane in the hydrosilylation. The nucleophilic substitution aims to lead in more cross-linking reaction sites and ensure that the solvent-free polysiloxane compound obtains a curing coating with a perfect cross-linking network structure when cured on a sheet substrate, so that stable performance of an anti-adhesion coating is ensured.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a spherical dendritic organosilicon macromolecule, a preparation method and application thereof. Background technique [0002] Silicone release coating refers to a substrate coated with a layer of release film on the surface, which can easily peel off highly adhesive substances. Among them, the chemicals that play the role of anti-sticking and isolating are called release agents. Due to its low toxicity, surface tension of 20-24mN / m, good wettability with paper, easy formation of a firm film on the surface of paper, wide range of temperature applications, and low migration of adhesives, it is the most widely used silicone release agent at present. Wide range of release agents. Silicone is used as a paper anti-adhesive agent. The mechanism of action is that the methyl group can rotate freely on the surface of the substrate, so that it can be arranged in an orderly a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08L83/07C08L83/05C08L87/00C09D183/07C09D7/12
Inventor 胡继文杨公华邹海良涂园园林树东张培陈又军沈建华姚文英
Owner 国科广化(南雄)新材料研究院有限公司
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