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Polyolefin resin nucleating agent and preparation method thereof

A technology of polyolefin resin and nucleating agent, applied in the field of polyolefin nucleating agent and its preparation

Active Publication Date: 2009-12-30
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although people have adopted many methods (Wang Xiaoqiang, Li Jichun, the method of dibenzylidene sorbitol nucleating agent to remove odor, "Petrochemical Technology and Application", 2000, 20 (4): 268-272), trying to overcome the aldehyde taste inconvenience, but still not entirely satisfactory

Method used

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  • Polyolefin resin nucleating agent and preparation method thereof
  • Polyolefin resin nucleating agent and preparation method thereof
  • Polyolefin resin nucleating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1 1,3: Preparation of 2,4-bis(3,4-dimethylbenzylidene)sorbitol-silica gel grafted nucleating agent.

[0065] In a four-port reaction kettle equipped with a stirrer, an addition funnel, a thermometer and a condenser, add 18.2g sorbitol, 100cm 3 Methanol, stirred to dissolve. Then, under stirring, add 28.3g of 3,4-dimethylbenzaldehyde, 1g of p-toluenesulfonic acid, 20.8g of tetraethyl silicate, react at 50°C for 7h, and neutralize the reaction system with aqueous sodium hydroxide solution. Make it pH ≥ 10, add tap water to wash, filter, and dry to obtain a white powder.

[0066] The FTIR spectrum of the sample is at 1090cm -1 There is a strong absorption of Si-O-Si nearby, and the infrared spectrum of the sample is shown in the attached figure 1 .

[0067] Under the same conditions, the sample prepared without adding tetraethyl silicate is called DMDBS.

Embodiment 2

[0068] Example 2 1,3: Preparation of 2,4-bis(p-methylbenzylidene)sorbitol-silica gel grafted nucleating agent.

[0069] In a four-port reaction kettle equipped with a stirrer, an addition funnel, a thermometer and a condenser, add 18.2 g of sorbitol and 100 cm of ethanol 3 , stir to dissolve. Then, under stirring, add 24.6g of p-tolualdehyde, 1.2g of benzenesulfonic acid, 20.8g of tetraethyl silicate, and react at 55°C for 7h, neutralize the reaction system with aqueous calcium hydroxide solution to make the pH≥ 10. Add tap water to wash, filter, and dry to obtain a white powder.

[0070] The FTIR spectrum of the sample is at 1090cm -1 There is a strong absorption of Si-O-Si nearby, and the infrared spectrum of the sample is shown in the attached figure 2 .

Embodiment 3

[0071] Example 3 1,3: Preparation of 2,4-bis(p-chlorobenzylidene)sorbitol-silica gel grafted nucleating agent.

[0072] In a four-port reaction kettle equipped with a stirrer, an addition funnel, a thermometer and a condenser, add 18.2 g of sorbitol and 100 cm of methanol 3 , stir to dissolve. Then, under stirring, add 26.4 g of p-chlorobenzaldehyde, 0.9 g of concentrated sulfuric acid, and 15.2 g of tetramethyl silicate. After reacting at 60° C. for 7 hours, neutralize the reaction system with aqueous potassium hydroxide to make the pH ≥ 10, Add tap water to wash, filter, and dry to obtain a white powder.

[0073] The FTIR spectrum of the sample is at 1090cm -1 There is a strong absorption of Si-O-Si nearby, and the infrared spectrum of the sample is shown in the attached image 3 .

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Abstract

The invention discloses a polyolefin resin nucleating agent and a preparation method thereof. The nucleating agent is polyol acetal-silica gel graft copolymer shown as a right general formula (I); the nucleating agent improves the stability of organic acetal and environment-friendly performance, reduces the production cost and remarkably improves the mechanical performance and thermal performance of polyolefin resin in particular.

Description

technical field [0001] The invention relates to a polyolefin nucleating agent and a preparation method thereof, in particular to a polyol diacetal-silica gel chemical graft nucleating agent and a preparation method thereof. Background technique [0002] Foreign countries began to study polypropylene (PP) transparent nucleating agents in the 1960s, and began industrial applications in the United States in the early 1980s. At present, the growth rate of demand for transparent PP products has exceeded 8%-10% of that of ordinary polypropylene products, which has driven the continuous progress of nucleating agent technology. In 2006, the global consumption of transparent PP was close to 3 million tons. In the same year, the consumption of transparent PP in China exceeded 250,000 tons, making it one of the fastest growing varieties of PP products. Adding a nucleating agent to PP is one of the main methods to produce transparent PP. There are mainly two types of nucleating agents,...

Claims

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Application Information

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IPC IPC(8): C08K9/02C08K5/156C08L23/00
Inventor 史建公赵桂良张敏宏刘志坚石勤智杨万泰赵丽梅张新军张毅王小涓钟健丁京秦金来殷喜平郑建坡蒋绍洋伊红亮白雪曾建华袁春海赵唤群赵立红孟凡立刘波安少军
Owner CHINA PETROLEUM & CHEM CORP
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