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Silicone resin coating type platinum catalyst as well as preparation method and application thereof

A platinum catalyst and a coating type technology are applied in the field of silicone resin coating type platinum catalysts and their preparation, which can solve the problems of the coating type catalyst being difficult to pulverize, the active components of the catalyst are exposed, and the stability of the silica gel system is reduced, and the stability is favorable. properties and application effects, beneficial to stability, and controllable catalytic activity

Active Publication Date: 2018-05-29
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coated catalyst uses soluble silicone resin as the coating material and is applied to the silica gel system. The coating of the catalyst is easily "melted" by the base rubber system, which reduces the stability of the silica gel system. On the other hand, it is prepared by a solution method Coated catalysts have defects such as difficulty in pulverization, uneven catalyst particle size, and "bare" catalyst active components, which limit the application of this type of catalyst system in addition-type silica gel systems

Method used

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  • Silicone resin coating type platinum catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0033] Preparation of silicone resin coated platinum catalyst:

[0034] (1) Slowly add 1 gram of sodium bicarbonate to a mixed solution of 1 gram of chloroplatinic acid, 5 grams of vinyltrimethoxysilane, and 30 grams of isopropanol, and stir the reaction for 30 minutes at 75° C., filter After removing the solid content, a platinum vinyl siloxane complex isopropanol solution is obtained;

[0035]2) Mix 10 grams of platinum vinyl siloxane complex isopropanol solution prepared in step (1) with 40 grams of phenyltrimethoxysilane, 4 grams of vinyltrimethoxysilane, 8 grams of methyltrimethoxysilane and 4 grams of methylphenyldimethoxyalkoxysilane are quickly added dropwise to a W / O mixture of 50 grams of water, 90 grams of n-octane and 10 grams of sorbitan trioleate. In the emulsion, react for 3 hours at 50°C;

[0036] (3) Mix 5 grams of phenyltrimethoxysilane, 1 gram of vinyltrimethoxysilane, and 1 gram of methyltrimethoxysilane into a constant pressure dropping funnel, add dropw...

Embodiment 2

[0039] Preparation of silicone resin coated platinum catalyst:

[0040] (1) In 1 gram of chloroplatinic acid, 2.8 gram of divinyltetramethyldisiloxane, 40 gram of isopropanol mixed solution, slowly add 1.07 gram of sodium bicarbonate, under the condition of 70 ℃, stir and react for 30 Minutes, the platinum vinyl siloxane complex isopropanol solution was obtained after filtering off the solid content;

[0041] (2) Mix 6 grams of platinum vinyl siloxane complex isopropanol solution prepared in step (1) with 10 grams of phenyltrimethoxysilane, 10 grams of vinyltrimethoxysilane, 40 grams of methyltrimethoxy A mixture of silane and 4 grams of methylphenyldimethoxyalkoxysilane was quickly added dropwise to a W / O mixture of 30 grams of water, 70 grams of n-octane and 30 grams of sorbitan trioleate. In the emulsion, under the condition of 50 ℃, react for 3 hours;

[0042] (3) Mix 8 grams of phenyltrimethoxysilane and 2 grams of methyltrimethoxysilane into the constant pressure dropp...

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Abstract

The invention relates to a silicone resin coating type platinum catalyst as well as a preparation method and application thereof. The silicone resin coating type platinum catalyst is core-shell microspheres which takes a platinum complex as a core and active component and crosslinking organic silicon resin as a coating layer and has the platinum catalysis hydrosilylation activity and is prepared by the following steps of by taking alkoxy silane as a raw material, performing secondary polymerization process with a W / O micro-emulsion to obtain the silicone resin coating type platinum catalyst. The silicone resin coating type platinum catalyst is uniform in particle size, good in stability, controllable in catalytic activity and suitable for application of single-component silica gel solidification system.

Description

technical field [0001] The invention relates to a catalyst, in particular to a silicone resin-coated platinum catalyst and its preparation method and application. Background technique [0002] In the addition-type silicone rubber system, the selection and use of catalysts and inhibitors has become one of the key technologies for addition-type silicone rubber. Generally, the silicone system can be divided into two components, one of which is added with base rubber and catalyst. , another component to add base gum, crosslinking agent and inhibitor. However, in the field of insulating impregnating varnishes, the one-component product system is a necessary choice for the addition-type silicone rubber system due to the limitations of the curing temperature and the use of technology. In order to ensure the stability of the one-component addition type silicone rubber, the catalyst can be coated to realize the physical isolation between the catalyst and the silica gel system. Under...

Claims

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Application Information

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IPC IPC(8): C08G77/08C08G77/20B01J13/18
CPCB01J13/18C08G77/08C08G77/20C08G77/80
Inventor 李金辉李冰彭丹牟秋红张硕于一涛赵宁王峰张方志
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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