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Titanium-containing condensed type catalyst, preparation method and application thereof

A catalyst and condensation-type technology, which is applied in the field of titanium-containing condensation-type catalysts, can solve problems such as toxicity, and achieve the effects of simple preparation method, enhanced water absorption capacity, and convenient storage

Active Publication Date: 2015-03-11
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these alkyltin based catalysts, although very effective, usually colorless, liquid and soluble in silicone oils, have the disadvantage of being toxic (CMR2 reproductive toxicity)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 142 parts of tetraisopropyl titanate to the flask, blow nitrogen gas for 30 minutes, add dropwise 1000 parts of polyether polyol with a molecular weight of 500 and small molecule hydroxyl silicone oil with a molecular weight of 500 in a molar ratio of 1:1. mixture. After reacting for 1 hour, remove the reacted low-molecular substances on the device for 1 hour to obtain the product.

Embodiment 2

[0036] Add 100 parts of tetraisopropyl titanate to the flask, blow nitrogen gas for 30 minutes, add dropwise 1000 parts of polyether polyol with a molecular weight of 300 and small molecule hydroxyl silicone oil with a molecular weight of 500 in a molar ratio of 1:2. mixture. After reacting for 0.5 hour, remove the reacted low molecular substances on the device for 2 hours to obtain the product.

Embodiment 3

[0038] Add 100 parts of tetraisopropyl titanate to the flask, pass helium gas for 40 minutes, add dropwise 1000 parts of polyether polyol with a molecular weight of 300 and small molecule hydroxyl silicone oil with a molecular weight of 500 in a molar ratio of 1:3 to prepare mixture. After reacting for 0.5 hours, remove the reacted low-molecular substances on the device for 0.5 hours to obtain the product.

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PUM

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Abstract

The invention provides a titanium-containing condensed type catalyst, a preparation method and application thereof. The preparation method comprises the following steps: 1) pretreatment: feeding an inert gas to tetraisopropyl titanate; 2) preparation of mixture: mixing polyether polyol and hydroxyl silicone oil uniformly to prepare a mixture; 3) reaction: dropwise adding the mixture to tetraisopropyl titanate and performing reaction; 4) aftertreatment: removing low-molecular substances after the reaction, and obtaining the titanium-containing condensed type catalyst. The catalyst is stable, good in compatibility with polysiloxane and high in solidification and catalysis efficiency for polysiloxane and has certain water absorbing capacity.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a titanium-containing condensation catalyst, its preparation method and application. Background technique [0002] Various alkaline substances, such as alkali metal salts: potassium hydroxide, sodium hydroxide, barium hydroxide, etc. are used as hydroxyl groups bonded to silicon atoms, alkoxy groups bonded to silicon atoms, or other A catalyst for the condensation reaction of functional groups to prepare organosilicon compounds such as organopolysiloxanes. In the case of using an alkali metal salt as a condensation reaction catalyst, it is necessary to add a step of neutralizing the alkali metal salt remaining after completion of the reaction, and removing the salt thus formed by filtration or the like. Furthermore, in order to completely neutralize the alkali metal salt, a slight excess of the acidic substance is generally used. In this case, it is necessary to add a step of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/08
Inventor 黄永军刘金明翁祝强尹邦志
Owner 兆舜科技(广东)有限公司
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