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Preparation method of freeze-tolerant packaging film composition

A packaging film and composition technology, applied in coatings, anti-corrosion coatings, etc., can solve the problems of poor peelability, low film strength, and single protective performance.

Inactive Publication Date: 2017-06-27
杨富元
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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
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Embodiment 1

[0024] A preparation method for a freeze-resistant packaging film composition, comprising the following steps:

[0025]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;

[0026] 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 and set aside;

[0027] 3) Add the secondary product obtained in step 2) into the second reaction kettle filled with disti...

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Abstract

The invention discloses a preparation method of a freeze-resistant packaging film composition, which includes the following steps: 1) adding isophorone diisocyanate and the like into a first reaction kettle at room temperature to obtain a primary product; 2) adding two Methylolpropionic acid, and then carry out vacuum distillation to obtain secondary products; 3) Disperse the secondary products in the second reaction kettle, add diethylenetriamine aqueous solution to prepare aliphatic water-based polyurethane emulsion; 4) Add to the second reaction kettle Add silica sol and aliphatic water-based polyurethane emulsion to the third reaction kettle to obtain a mixed emulsion for later use; 5) Add an appropriate amount of potassium salt of acrylic acid copolymer to the fourth reaction kettle to obtain a mixed bottom liquid; 6) Add it to the mixed bottom liquid The mixed emulsion is added to obtain a freeze-resistant packaging film composition. The packaging film composition prepared by the invention has strong cohesive force, good peelability, high coating film strength and good safety and environmental protection performance.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a preparation method of a freeze-resistant packaging film composition. 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 coatings still...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D5/20C09D5/08C09D7/12C08G18/08C08G18/34C08G18/48C08G18/66
CPCC09D175/08C08G18/0823C08G18/348C08G18/4804C08G18/6692C08G2150/90C08L2205/035C09D5/08C09D5/20C09D7/61C09D7/65
Inventor 杨富元
Owner 杨富元
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