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Preparation method of high-stability platinum complex catalyst and application thereof

A platinum complex and high-stability technology, which is applied in the preparation of hydrosilylation silicone resin and hydrosilylation silicone rubber, can solve problems such as gelation, crosslinking failure, and inhibitor volatilization

Pending Publication Date: 2020-06-09
东莞市晶瑞达硅胶材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, acetylenic alcohol compounds are commonly used as inhibitors, which are easy to volatilize and often accompanied by a strong pungent odor during use, and this single-component platinum vulcanizing agent needs to be stored and transported safely under relatively low temperature conditions. Under the environment, gelation or cross-linking failure may occur after being exposed for a few days
In more serious cases, due to the volatilization of inhibitors and the loss of low temperature conditions, etc., the vulcanizing agent will spontaneously ignite, causing safety production accidents
These defects also limit the long-distance transportation and large-scale industrial application of this kind of single-component platinum vulcanizing agent

Method used

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  • Preparation method of high-stability platinum complex catalyst and application thereof
  • Preparation method of high-stability platinum complex catalyst and application thereof
  • Preparation method of high-stability platinum complex catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1 (comparative example)

[0071] Preparation of Ordinary Karstedt Catalyst

[0072] This embodiment 1 is a comparative example for implementing 2 and 3, and is also the basic process of subsequent related embodiments.

[0073] S1. Weigh 1000g of isopropanol and 4500g of divinyltetramethyldisiloxane into a 10L glass reactor, stir to dissolve and disperse evenly;

[0074] S2, feed nitrogen into the container, add a mixed solution of 300g hexachloroplatinic acid hexahydrate and 2000g isopropanol while stirring, and stir evenly;

[0075] S3, add 1200g sodium bicarbonate while stirring, stir evenly;

[0076] S4. Heating the temperature of the water bath in the jacket of the reaction kettle to 75-85°C, keeping the temperature of the reaction solution at 70-75°C, and stirring and reacting under the protection of nitrogen;

[0077] S5. Keep heating and stirring for 1-2 hours, until the reaction solution no longer deflates and bubbles, and the color turns milky whi...

Embodiment 2

[0083] Preparation of highly stable platinum complex catalyst A

[0084] S1. Weigh 1000g of isopropanol and 4500g of divinyltetramethyldisiloxane into a 10L glass reactor, stir to dissolve and disperse evenly;

[0085] S2, feed nitrogen into the container, add a mixed solution of 300g hexachloroplatinic acid hexahydrate and 2000g isopropanol while stirring, and stir evenly;

[0086] S3, add 1200g sodium bicarbonate while stirring, stir evenly;

[0087] S4. Heating the temperature of the water bath in the jacket of the reaction kettle to 75-85°C, keeping the temperature of the reaction solution at 70-75°C, and stirring and reacting under the protection of nitrogen;

[0088] S5. Keep heating and stirring for 1 to 2 hours until the reaction solution no longer deflates and bubbles, and the color becomes milky white, then add 600g of nitrogen-containing compound as a modification additive, and continue to maintain the temperature of the jacketed water bath of the heating reactor t...

Embodiment 3

[0094] Preparation of highly stable platinum complex catalyst B

[0095] The steps of the operation method are the same as those in Example 2, except that the modification aid in step S5 is replaced with 600 g of phosphorus-containing compound.

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Abstract

The invention discloses a preparation method of a high-stability platinum complex catalyst and an application thereof. The catalyst comprises a high-stability platinum complex catalyst and a temperature-sensitive compound coated microcapsule platinum catalyst, the high-stability platinum complex catalyst takes a platinum complex formed by taking a siloxane compound containing unsaturated groups asa ligand as a core and an active component, or takes an organic compound containing N and P as a modification auxiliary agent; the temperature-sensitive compound coated microcapsule platinum catalysttakes the high-stability platinum complex with unsaturated group coordination or a common Karstedt catalyst as a basic core; the temperature-sensitive compound is used as a coating layer to form thecore-shell microsphere with hydrosilylation catalytic activity, the platinum catalyst and the inhibitor are less in use amount and long in normal-temperature storage time, intense catalytic dehydrogenation of hydrogen-containing silicone oil is not easy to cause, and the transportation and use safety is high.

Description

technical field [0001] The invention relates to a preparation method and application of a platinum complex catalyst for high-temperature curing of hydrosilicon addition-type silicone rubber, and belongs to the technical field of preparation of hydrosilicon addition-type silicone rubber and hydrogen-silicon addition-type silicone resin. Background technique [0002] In the field of hydrosilylation reaction, platinum complex catalyst is a kind of high-efficiency catalyst commonly used at present, but the traditional Karstedt catalyst has strong activity and poor stability, and is easily poisoned and lost due to the influence of organic tin, organic amine and other compounds live. [0003] In order to improve these shortcomings, scientific and technological workers have carried out a series of improvements, such as: [0004] Patent CN 10251614 A synthesized a nitrogen heterocyclic carbene platinum complex catalyst, the structure of which is shown below. [0005] [0006] I...

Claims

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Application Information

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IPC IPC(8): B01J31/22C07F7/08C07F15/00C08L83/07C08L83/05
CPCB01J31/2291C07F7/0889C07F15/0093C08L83/04C08L2205/025B01J2531/828B01J35/19
Inventor 黄利平王冲金本强
Owner 东莞市晶瑞达硅胶材料科技有限公司
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