Chemical graft and its preparation method and use

A chemical grafting and compound technology, applied in the field of chemical grafting and its preparation, can solve the problems of high cost, increase cost, and the tensile yield stress needs to be increased, and achieve the effect of reducing cost

Active Publication Date: 2021-09-03
湖北新南化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of silica gel, alumina, and aluminum hydroxide is high, which increases the cost of industrial use, and these nucleating agents still need to be improved in terms of the haze and tensile yield stress of polyolefin resins.

Method used

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  • Chemical graft and its preparation method and use
  • Chemical graft and its preparation method and use
  • Chemical graft and its preparation method and use

Examples

Experimental program
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Effect test

preparation example Construction

[0037]

[0038] The preparation method of the chemical graft of the present invention comprises the following steps: mixing the polyol with an organic solvent to form a first mixture; mixing the first mixture with an aromatic aldehyde to form a second mixture; mixing the second mixture with a catalyst and kaolin , forming a third mixture; reacting the third mixture at 20-80° C. for 2-10 hours to obtain a reaction solution; adjusting the pH of the reaction solution to be greater than or equal to 10 to terminate the reaction, and obtain a chemical graft after post-treatment.

[0039] In the present invention, the polyol may be selected from sorbitol, xylitol or glucose. According to one embodiment of the invention, the polyol is sorbitol.

[0040] The organic solvent can be selected from one or more of monovalent hydrocarbon alcohols, saturated aliphatic ethers, and chlorinated hydrocarbons. Examples of monohydric hydrocarbyl alcohols include, but are not limited to, methanol...

Embodiment 1

[0055] 18.2 g of sorbitol were dissolved in 100 mL of methanol to form a first mixture. Under stirring, the first mixture and 28.3 g of 3,4-dimethylbenzaldehyde were mixed to form a second mixture. Under stirring, the second mixture, 1 g of p-toluenesulfonic acid, and 2.5 g of activated kaolin were mixed to form a third mixture. Under stirring, the third mixture was reacted at 50° C. for 7 h to obtain a reaction liquid. Adjust the reaction liquid with aqueous sodium hydroxide solution to pH greater than or equal to 10, add tap water to wash, filter, and dry to obtain the chemical graft (additive 1) of the present invention.

Embodiment 2

[0057] 18.2 g of sorbitol were dissolved in 100 mL of methanol to form a first mixture. Under stirring, the first mixture and 26.4 g of p-chlorobenzaldehyde were mixed to form a second mixture. Under stirring, the second mixture, 0.9 g of concentrated sulfuric acid (95% by weight concentration) and 2.4 g of activated kaolin were mixed to form a third mixture. Under stirring, the third mixture was reacted at 60° C. for 7 h to obtain a reaction solution. Adjust the reaction liquid with sodium carbonate aqueous solution to pH greater than or equal to 10, add tap water to wash, filter, and dry to obtain the chemical graft (additive 2) of the present invention.

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Abstract

The invention discloses a chemical graft, its preparation method and application. The chemical graft of the present invention is a chemical graft of polyol diacetal and kaolin. The chemical graft of the invention reduces the cost, and can reduce the haze and increase the tensile yield stress of the polyolefin resin.

Description

technical field [0001] The invention relates to a chemical graft and its preparation method and application. Background technique [0002] As the demand for transparent polypropylene products continues to increase, the market for polypropylene nucleating agents is also expanding. The most widely used class of nucleating agents is the polyol acetal nucleating agent. This kind of nucleating agent is obtained from polyalcohol and benzaldehyde or its substituted derivatives through aldol condensation reaction in the presence of an acidic catalyst. The aldol condensation reaction is a reversible reaction in the presence of an acidic catalyst. Therefore, during the storage or use of polyol acetal nucleating agents, aldehydes will be released due to decomposition, which will bring unpleasant odors. CN101613490A discloses a polyolefin resin nucleating agent, which is a polyol diacetal-silica gel graft. CN104163938A discloses a nucleating agent, which is a polyol diacetal-alumina ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K3/34C08K5/1575C08L23/12
CPCC08K3/346C08K5/1575C08K9/04C08L23/12Y02P20/52
Inventor 李家晓李天然张宇
Owner 湖北新南化科技有限公司
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