Method for preparing PET-organic intercalated montmorillonite composite material

A technology of intercalated montmorillonite and composite materials, which is applied in the field of organic intercalated montmorillonite composite materials, can solve the problem that the barrier property of PET cannot meet the requirements of blood collection tubes and liquid beverages, and achieves high efficiency without affecting production efficiency. , the effect of convenient amplification of the preparation process

Inactive Publication Date: 2012-05-02
GUANGZHOU IMPROVE MEDICAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a PET-organic intercalation montmorillonite composite material for the existing PET barrier properties can not meet the requirements of the use of blood vessels, liquid beverages, with a simple process to obtain water PET products with good gas barrier properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Mold cetyltributylphosphonium bromide intercalated sodium montmorillonite and PET at a ratio of 20:80 (W / W) into a sheet at a temperature of 265°C, and then crush it into granules with a pulverizer , and then use a co-rotating twin-screw extruder to melt, blend and granulate at a temperature of 265° C. to obtain PET containing 20% ​​(W / W) hexadecyltributylphosphonium bromide intercalated montmorillonite. Masterbatch material, wherein, the exchange capacity of montmorillonite is 90mmol / 100g, and the organic matter content in the intercalated montmorillonite is 20%;

[0032] 2) By setting the mass percentage of montmorillonite in the final product to be 2%, the PET masterbatch containing the above-mentioned quaternary phosphonium salt intercalated montmorillonite was mixed evenly with PET, then dried at 120° C. for 4 hours, and dried at 265 The organic montmorillonite-modified PET plastic sheet is obtained by injection molding on an injection molding machine at ℃.

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Embodiment 2

[0036] 1) Mix KH550 (that is, γ-aminopropyltriethoxysilane) intercalated sodium montmorillonite and PET at 20:80 (W / W) on an internal mixer or extruder at 275°C, and pulverize After pelletizing, PET masterbatches with high montmorillonite content were obtained, wherein the exchange capacity of montmorillonite was 90mmol / 100g, and the organic matter content in the intercalation montmorillonite was 15%;

[0037] 2) According to the set final concentration of 3% montmorillonite, mix the PET masterbatch containing KH550 intercalated montmorillonite evenly with PET, dry at 150°C for 6 hours, and then extrude it on an injection molding machine at 300°C to obtain Organic MMT modified plastic sheet.

[0038] After inspection, the final montmorillonite content of the plastic sheet obtained in this embodiment is 2.5%, and the light transmittance exceeds 80% in the visible light region, which is more than 90% of pure PET; the final oxygen transmission rate reduces by about 35%; the water...

Embodiment 3

[0040] 1) Mix KH550 intercalated sodium-based montmorillonite and PET at 60:40 (W / W) on a mixer or extruder at 275°C, banbury, then take it out and cool it, and grind it into pellets with a pulverizer A PET masterbatch material containing high montmorillonite was obtained, wherein the exchange capacity of montmorillonite was 90mmol / 100g, and the organic matter content in the intercalated montmorillonite was 15%;

[0041] 2) According to the set final concentration of 4% montmorillonite, the PET masterbatch containing KH550 intercalated montmorillonite was mixed with PET, then dried at 170°C for 8 hours, and then extruded on an injection molding machine at 330°C to obtain Organic MMT modified plastic sheet.

[0042] After inspection, the final montmorillonite content of the plastic sheet obtained in this embodiment is 3.5%, and the light transmittance exceeds 82% in the visible light region, which is more than 91% of pure PET; the final oxygen transmission rate reduces by about...

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Abstract

The invention discloses a method for preparing a PET (Polyethylene Terephthalate)-organic intercalated montmorillonite composite material, comprising the following steps of: 1) mixing organic intercalated montmorillonite and fully dried PET according to the weight ratio of 20: 80 to 80: 20 to obtain mixed materials, and preparing the mixed materials into a PET master batch containing the organic intercalated montmorillonite, in which the organic intercalated montmorillonite is obtained by reacting a quaternary phosphonium salt or a silane coupling agent and a sodium montmorillonite intercalation; and 2) uniformly mixing the PET master batch containing the organic intercalated montmorillonite prepared in the step 1) and the PET, so that the mass percentage of the montmorillonite in the mixture is 1-10%; and moulding in an injection way by an injection moulding machine to obtain the product. By mixing the quaternary phosphonium salt or the silane coupling agent organic intercalation modified sodium montmorillonite and the PET to obtain the PET master batch containing the organic intercalated montmorillonite, and then mixing with the pure PET proportionally and moulding in the injection way to obtain the product, the method disclosed by the invention provides a new technology applied to the large-scale production, and can obtain the PET product with good water and gas barrier properties.

Description

technical field [0001] The invention relates to the technical field of organic intercalation montmorillonite composite materials, in particular to a preparation method of PET-organic intercalation montmorillonite composite materials. Background technique [0002] There is a great demand for materials with high barrier properties, high heat resistance, and good transparency. In view of the excellent comprehensive properties of polyethylene terephthalate (PET for short), based on PET, it is modified by physical or chemical methods, and a convenient and feasible technical route is used to make PET-based products satisfy The required water and gas barrier functions have become one of the hot spots in the research and application of composite materials. Although PET is better than ordinary plastics in terms of air permeability and water permeability, the vacuum degree can only be maintained for 9-12 months, and the water content can be maintained for about 3-6 months, which cann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K9/04C08K9/06C08K3/34C08J3/22B29C45/00
Inventor 许铭飞汤顺清储彬马海波邓冠华徐立新
Owner GUANGZHOU IMPROVE MEDICAL TECH CO LTD
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