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Preparation method of steaming-resisting and boiling-resisting poly(vinylidene chloride) (PVDC) waterborne emulsion

A water-based emulsion, retort-resistant technology, used in flexible coverings, coatings, packaging, etc., can solve problems such as limited shelf life, reduced barrier properties, and poor transparency, achieve low film-forming temperature and heat-sealing temperature, improve Film-forming and heat-sealing properties, and the effect of ensuring barrier properties

Active Publication Date: 2015-01-07
ZHEJIANG QUZHOU JUSU CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The packaged food provided needs to be cooked and processed by consumers before they can be eaten, which is a waste of time;
[0004] 2. The food provided has not been sterilized by high temperature and has a limited shelf life;
[0005] 3. The packaging is opaque, and the packaged objects cannot be seen
The disadvantage is that the retort-resistant PVDC water-based emulsion coating film obtained by this method will fog and "whiten" during the boiling process, the barrier property will decrease, and the transparency will deteriorate, which will affect the appearance and performance of packaging products.

Method used

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  • Preparation method of steaming-resisting and boiling-resisting poly(vinylidene chloride) (PVDC) waterborne emulsion
  • Preparation method of steaming-resisting and boiling-resisting poly(vinylidene chloride) (PVDC) waterborne emulsion
  • Preparation method of steaming-resisting and boiling-resisting poly(vinylidene chloride) (PVDC) waterborne emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method for retort-resistant PVDC aqueous emulsion, comprising the steps of:

[0033] (1) Based on 100 parts of mixed monomers, prepare an aqueous solution of initiator and emulsifier according to the following formula:

[0034]

[0035] (2) Put 38kg of deionized water, 80g of sodium lauryl sulfate, and 20g of glacial acetic acid into a 100L stainless steel polymerization kettle (length-to-diameter ratio of 2:1, double-layer and two-leaf 45° inclined propeller), and test the pressure with nitrogen Vacuum after leak testing.

[0036] (3) Add 3.3kg of vinylidene chloride and 0.28kg of methyl acrylate into the polymerization kettle, stir for 20 minutes, then raise the temperature to 55°C, add 0.25kg of tert-butyl hydrogen peroxide aqueous solution and 0.24kg of diaoba powder aqueous solution dropwise, drop The reaction was added for 1 hour to complete the seed polymerization.

[0037] (4) Continuously drop 22.6kg of vinylidene chloride, 2.1kg of methyl ac...

Embodiment 2

[0042] A preparation method for retort-resistant PVDC aqueous emulsion, comprising the steps of:

[0043](1) Based on 100 parts of mixed monomers, prepare an aqueous solution of initiator and emulsifier according to the following formula:

[0044]

[0045]

[0046] (2) Put 38kg of deionized water, 135g of sodium lauryl sulfate, and 25g of potassium bicarbonate into a 100L stainless steel polymerization kettle (length-to-diameter ratio of 2:1, double-layer and two-leaf 45° oblique propeller), and test with nitrogen Vacuum after leak test.

[0047] (3) Add 1.96kg of vinylidene chloride and 0.3kg of methyl acrylate into the polymerization kettle, stir for 22 minutes, then raise the temperature to 57°C, add 0.20kg of tert-butyl hydrogen peroxide aqueous solution and 0.20kg of diaoba powder aqueous solution dropwise, drop The reaction was added for 0.5 hours to complete the seed polymerization.

[0048] (4) Continuously drop 17.15kg of vinylidene chloride, 1.4kg of methyl a...

Embodiment 3

[0053] A preparation method for retort-resistant PVDC aqueous emulsion, comprising the steps of:

[0054] (1) Based on 100 parts of mixed monomers, prepare an aqueous solution of initiator and emulsifier according to the following formula:

[0055]

[0056]

[0057] (2) Put 38kg of deionized water, 60g of sodium lauryl sulfate, and 12g of glacial acetic acid into a 100L stainless steel polymerization kettle (length-to-diameter ratio of 2:1, double-layer and two-leaf 45° inclined propeller), and test the pressure with nitrogen Vacuum after leak testing.

[0058] (3) Add 2.52kg of vinylidene chloride and 0.28kg of methyl acrylate into the polymerization kettle, stir for 25 minutes, then raise the temperature to 55°C, add 0.28kg of tert-butyl hydrogen peroxide aqueous solution and 0.27kg of diabolite aqueous solution dropwise, drop The reaction was added for 1.5 hours to complete the seed polymerization.

[0059] (4) Continuously drop 30.18kg of vinylidene chloride, 1.4kg...

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PUM

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Abstract

The invention discloses a preparation method of steaming-resisting and boiling-resisting poly(vinylidene chloride) (PVDC) waterborne emulsion. The preparation method adopts a vinylidene chloride monomer and a comonomer to perform copolymerization in a polymerizing kettle, the vinylidene chloride monomer, the comonomer and an assistant are added in a staged mode, and the reaction temperature and the reaction time are controlled to synthesize the steaming-resisting and boiling-resisting PVDC waterborne emulsion. The steaming-resisting and boiling-resisting PVDC waterborne emulsion prepared by means of the method is suitable for coating of two-way stretching nylon membranes, manufactured coating membranes are good in barrier property and have a good water-boiling- 'whitening' resisting characteristic, and the coating membranes are transparent in appearance after boiled with water and can be widely applied to packing materials of water-boiled sterilized foods including fruits, vegetables, fresh meat and the like.

Description

technical field [0001] The invention relates to a method for preparing a PVDC copolymer emulsion, more specifically, the invention relates to a method for preparing a retort-resistant PVDC aqueous emulsion. Background technique [0002] Polyvinylidene chloride (PVDC) polymer material, as a packaging material with good comprehensive barrier properties, is safe and non-toxic, and has a wide range of applications in the field of food packaging. The application technology of general-purpose PVDC emulsion in food coating film BOPP and BOPET film is mature. However, there are following deficiencies in the packaging of boiled fruits and vegetables and fresh food: [0003] 1. The packaged food provided needs to be cooked and processed by consumers before they can be eaten, which is a waste of time; [0004] 2. The food provided has not been sterilized by high temperature and has a limited shelf life; [0005] 3. The packaging is opaque, and the packaged objects cannot be seen. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/08C08F220/14C08F220/18C08F220/28C08F220/44C08F220/06C08F222/02C08F2/26C08F2/30C09D127/08C08J7/04B65D65/46
Inventor 邓建明韩金铭吴宇鹏苏兰辉周强吴学红郑向军陈俊杰吕颖琦
Owner ZHEJIANG QUZHOU JUSU CHEM IND CO LTD
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