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High-transmittance polypropylene composition

A high-permeability polypropylene and composition technology, applied in the field of polymer composite materials, can solve problems such as increased melt viscosity, and achieve the effects of performance improvement, grain refinement, and high recognition efficiency

Inactive Publication Date: 2021-07-16
SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sorbitol-based nucleating agent will assemble in the polypropylene melt to form a three-dimensional network structure, causing the entire system to gel, resulting in a sudden increase in melt viscosity; , pulling, blowing, etc.) have negatively affected

Method used

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  • High-transmittance polypropylene composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A high-transparency polypropylene composition, formula and preparation method are as follows:

[0035] Dissolve appropriate amount of DMDBS, sodium hydroxide and tetrabutylammonium bromide (TBAB) in N,N-dimethylformamide (DMF) solvent at 70°C, stir well and add epichlorohydrin (ECH), 60°C Under reaction for 8 hours, the molar ratio of ECH and sorbitol nucleating agent in the raw material is greater than 2:1; multiple times of filtration and washing to remove impurities and drying to obtain DMDBS derivatives without hydroxyl groups;

[0036] The modified nucleating agent is obtained by mixing the hydroxyl-free DMDBS derivative and DMDBS at a mass ratio of 2:1; take 100 parts of isotactic polypropylene K1008 (Yanshan Petrochemical Company), 1 part of modified nucleating agent, 0.1 part of antioxidant Agent 2,6-di-tert-butyl-p-cresol (Beijing Institute of Addition Auxiliaries), 0.1 part of light stabilizer bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacic acid The ester (Bei...

Embodiment 2

[0038] A high-transparency polypropylene composition, formula and preparation method are as follows:

[0039] The preparation of DMDBS derivatives without hydroxyl is the same as in Example 1;

[0040] Mix the hydroxyl-free DMDBS derivatives and DMDBS at a mass ratio of 3:1 to obtain a modified nucleating agent; take 100 parts of isotactic polypropylene K1008 (Yanshan Petrochemical Company), 1 part of modified nucleating agent, 0.1 part of antioxidant Agent 2,6-di-tert-butyl-p-cresol (Beijing Institute of Addition Auxiliaries), 0.1 part of light stabilizer bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacic acid The ester (Beijing Addition Auxiliary Research Institute) is mixed evenly and put into a high-speed mixer at a speed of 80-120rpm, stirred for 30 minutes, and then the premix is ​​extruded and granulated at 180-230°C.

Embodiment 3

[0042] A high-transparency polypropylene composition, formula and preparation method are as follows:

[0043] The preparation of DMDBS derivatives without hydroxyl is the same as in Example 1;

[0044] The modified nucleating agent is obtained by mixing the hydroxyl-free DMDBS derivative and DMDBS at a mass ratio of 4:1; 100 parts of isotactic polypropylene K1008 (Yanshan Petrochemical Company), 1 part of modified nucleating agent, 0.1 part of antioxidant Agent 2,6-di-tert-butyl-p-cresol (Beijing Institute of Addition Auxiliaries), 0.1 part of light stabilizer bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacic acid The ester (Beijing Addition Auxiliary Research Institute) is mixed evenly and put into a high-speed mixer at a speed of 80-120rpm, stirred for 30 minutes, and then the premix is ​​extruded and granulated at 180-230°C.

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Abstract

The invention discloses a high-transmittance polypropylene composition, which comprises the following components in parts by mass: 100 parts of isotatic polypropylene, 0.01-2 parts of a modified nucleating agent, 0.01-1 part of an antioxidant and 0.01-1 part of a light stabilizer, and the modified nucleating agent is prepared from a hydroxyl-free sorbitol derivative and a sorbitol nucleating agent. According to the hydroxyl-free sorbitol derivative, due to the fact that original hydrogen bonds and pi-pi interaction recognition site structures are reserved, the recognition efficiency of non-covalent interaction between derivative molecules and nucleating agent molecules is higher, combination is better, meanwhile, the hydroxyl-free sorbitol derivative molecules are small organic molecules, and are easy to disperse in polypropylene resin, so that the composite modified nucleating agent has good improvement effects on the properties such as grain refinement, fog uniformity and modulus of polypropylene while realizing no gelation effect.

Description

technical field [0001] The invention relates to a high-permeability polypropylene composition, which belongs to the field of polymer composite materials. Background technique [0002] Polypropylene PP is one of the five general-purpose plastics. It has abundant sources of raw materials, is cheap, easy to process and shape, and has excellent comprehensive performance, so it has been widely used. As a semi-crystalline polymer material, PP has excellent properties such as high rigidity, corrosion resistance, and electrical insulation. In the polypropylene resin produced in general industry, the isotactic structure content is about 95%, and the rest is atactic or syndiotactic polypropylene. Due to the large size of spherulites in ordinary polypropylene, the interfacial bonding between crystals is weak, which leads to defects such as poor transparency, insufficient modulus and strength. [0003] In order to meet the market demand for high transparency and high modulus polypropy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/00C08K5/1575
CPCC08K5/00C08K5/1575C08K2201/014C08L2205/24C08L2201/10C08L23/12
Inventor 罗吉江符书臻崔如玉花超朱瑜芳
Owner SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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