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Preparation method of packaging body composition based on modified silica sol emulsion

A technology of silica sol emulsion and packaging body, applied in the field of packaging and decoration, can solve the problems of poor peelability, low coating film strength, single protective performance, etc., and achieve the effects of preventing pollution, high coating film strength, and improving appearance.

Inactive Publication Date: 2017-06-09
重庆市共赢包装制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing water-based protective coatings still have the disadvantages of low film strength, poor peelability and single protective performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the package composition based on the modified silica sol emulsion comprises the following steps:

[0029] 1) Add isophorone diisocyanate, polypropylene glycol, polyethylene glycol, dibutyltin dilaurate and butanone to the first reaction kettle at room temperature, and then raise the temperature to 58~80°C to make them Mix and react in the reactor until the value of -NCO% in the system does not change, and obtain the primary product for subsequent use;

[0030] 2) Control the temperature at 80°C, add dimethylolpropionic acid to the primary product obtained in step 1) and react for 220~260min, then lower the temperature to 38~43°C, add triethylamine; then control the temperature At 79~80°C, the pressure is controlled at -0.095~-0.085 MPa, and vacuum distillation is carried out until the solid content reaches 80~95% to obtain secondary products;

[0031] 3) adding the secondary product obtained in step 2) into the second reaction kettle filled wi...

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Abstract

The invention discloses a preparation method of a packaging body composition based on a modified silica sol emulsion. The preparation method comprises the following procedures: (1) adding toluene diisocynate and the like into a first reaction kettle at the room temperature, so as to obtain a primary product; (2) adding dimethylolpropionic acid into the primary product, and carrying out reduced pressure distillation, so as to obtain a secondary product; (3) preparing an aliphatic waterborne polyurethane emulsion; (4) preparing modified silica sol; (5) adding the aliphatic waterborne polyurethane emulsion and the silica sol into a third reaction kettle at the room temperature, so as to obtain a mixed emulsion; (6) adding a proper amount of acrylic copolymer sylvite and the like into a fourth reaction kettle containing distilled water, so as to obtain a mixed base solution; and (7) adding the mixed emulsion into the mixed base solution, so as to obtain the packaging body composition based on a modified silica sol emulsion. The packaging body composition prepared by virtue of the preparation method has relatively strong cohesion, good peelable property, relatively high paint film strength, relatively good safety and environmental protection property and relatively high stability.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a method for preparing a package composition based on modified silica sol emulsion. Background technique [0002] In order to prevent the materials or semi-products exposed to the atmosphere from being polluted, corroded and damaged, and prolong their service life, they are usually coated with good protective and peelable coatings on their surfaces for effective and temporary maintenance. Archive protection. In this way, it can not only isolate the invasion of air, salt spray, and microorganisms from the outside to achieve anti-corrosion effect; but also achieve the effect of cleaning and decontamination by adsorbing pollutants. Compared with solvent-based protective coatings, water-based protective coatings are safer and more environmentally friendly, so they are widely used in the field of product packaging and decoration. However, the existing water-based protective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D183/12C09D183/04C09D133/02C09D7/12C09D5/08C08G18/12C08G18/66C08G18/48C08G18/32C08G18/34
CPCC09D175/08C08G18/12C08G18/3228C08G18/348C08G18/4808C08G18/6685C08G18/6692C08G2150/90C08L2205/025C08L2205/035C09D5/08C09D7/62
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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