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Accelerator of platinum catalyst for hydrosilylation, preparation method and application thereof

A technology of hydrosilylation and accelerator, which is applied in the field of accelerators of platinum catalysts for hydrosilylation of olefins, can solve the problems of low catalytic activity and selectivity of the catalyst, and achieve easy control, good reproducibility and good catalytic effect. Effect

Inactive Publication Date: 2010-10-06
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a catalyst for olefin hydrosilylation platinum catalyst for the technical problem of low catalytic activity and selectivity of existing catalysts

Method used

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  • Accelerator of platinum catalyst for hydrosilylation, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Polyethylene glycol 200 modification (one-end modification) as an accelerator

[0026] Weigh 10.0g of polyethylene glycol 200 (0.05mol), put 5.4g of maleic anhydride (0.055mol) into a flask with a magnetic stirrer, heat up to 80°C, stir for 5 hours, separate, and release the product After drying in a vacuum oven at 40° C. for 24 hours, the accelerator was obtained, that is, the accelerator described in the present invention.

[0027] Take 1.0 g of the above accelerator, add 1 ml of chloroplatinic acid tetrahydrofuran solution (containing 0.00026 g of chloroplatinic acid), and stir evenly to obtain a catalyst system with a mass content of platinum of 0.01%.

[0028] Weigh 0.4g of the above catalyst, 9.6g (0.1mol) of styrene and 18.0g (0.11mol) of triethoxyhydrogensilane into a 100ml single-necked flask, react in a 60°C silicone oil bath for 1h, cool, and the product is subjected to GC -MS detection, the conversion rate of styrene is 99.8%, and the selectivity...

Embodiment 2

[0035] Example 2: Polyethylene glycol 200 modification (double-end modification) as an accelerator

[0036] Weigh 10.0g polyethylene glycol 200 (0.05mol) and 10.8g (0.11mol) of maleic anhydride into a flask with a magnetic stirrer, heat up to 80°C, stir for 5 hours, separate, and release the product After drying in a vacuum oven at 40° C. for 24 hours, the accelerator was obtained, that is, the accelerator described in the present invention.

[0037] Take 1.0 g of the above accelerator, add 1 ml of chloroplatinic acid tetrahydrofuran solution (containing 0.00026 g of chloroplatinic acid), and stir evenly to obtain a catalyst system with a mass content of platinum of 0.01%.

[0038] Weigh 0.4g of the above catalyst, 9.6g (0.1mol) of styrene and 18.0g (0.11mol) of triethoxyhydrogensilane into a 100ml single-necked flask, react in a 60°C silicone oil bath for 1h, cool, and the product is subjected to GC -MS detection, the conversion rate of styrene is 100%, and the selectivity o...

Embodiment 3

[0044] Example 3: Polyethylene glycol 400 modification (one-end modification) as an accelerator

[0045] Weigh 20.0g of polyethylene glycol 400 (0.05mol), 5.4g of maleic anhydride (0.055mol) into a flask with a magnetic stirrer, heat up to 80°C, stir for 4 hours, separate, and release the product After drying in a vacuum oven at 40° C. for 24 hours, the accelerator was obtained, that is, the accelerator described in the present invention.

[0046] Take 1.0 g of the above accelerator, add 1 ml of chloroplatinic acid tetrahydrofuran solution (containing 0.00026 g of chloroplatinic acid), and stir evenly to obtain a catalyst system with a mass content of platinum of 0.01%.

[0047] Weigh 0.4g of the above catalyst system, 9.6g (0.1mol) styrene and 18.0g (0.11mol) triethoxyhydrogensilane were placed in a 100ml single-necked flask, reacted in a 60°C silicone oil bath for 1h, cooled, and the product was GC-MS detection showed that the conversion rate of styrene was 98.4%, and the s...

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Abstract

The invention belongs to the field of synthesizing an alkoxy silane monomer, relating to an accelerator of a platinum catalyst for hydrosilylation, which is carboxyl-containing or ethylenic bond-carboxyl-containing modified polyethylene glycol obtained by reaction of polyethylene glycol or methoxy polyethylene glycol with anhydride. The invention also provides a preparation method for the accelerator and an application thereof. The preparation method for the accelerator comprises the following step of modifying the polyethylene glycol or methoxy polyethylene glycol molecular monomer by using anhydride at the temperature of between 20 and 150 DEG C. The accelerator serving as an auxiliary agent is used for establishing a catalyst system for addition reaction of unsaturated olefin and hydrogenalkoxysilane by platinum catalysis, and solves the technical problems that the conventional catalyst has poor catalytic activity and low selectivity.

Description

technical field [0001] The invention belongs to the field of synthesis of alkoxysilane monomers, and relates to a promoter for platinum catalysts, in particular to a promoter for olefin hydrosilylation platinum catalysts, a preparation method and application thereof. Background technique [0002] As we all know, alkoxysilane is a very important intermediate in the organosilicon industry. Alkoxysilane is usually prepared by addition reaction of unsaturated olefin and hydrogen-containing silane. Hydrosilylation reaction plays an important role in organic silicon synthesis chemistry, and is one of the most important ways to synthesize functional organic silicon monomers, silane coupling agents, functional organic silicon compounds and polymers. The most critical technology in the hydrosilylation reaction is the selection and preparation of the catalyst. The hydrosilylation of olefins usually directly uses chloroplatinic acid as the catalyst. Homogeneous catalysts have the char...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J31/28C07F7/18
Inventor 白赢彭家建厉嘉云蒋剑雄来国桥
Owner HANGZHOU NORMAL UNIVERSITY
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