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Preparation method of flexible protecting film composition

A protective film and composition technology, applied in coatings, anti-corrosion coatings, etc., can solve the problems of poor peelability, single protective performance, low coating film strength, etc., and achieve the effects of preventing pollution, improving appearance, and high coating film strength.

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

[0024] The preparation method of tough protective film composition comprises the following steps:

[0025]1) Put the raw material polypropylene glycol in a drying oven for 450-500 minutes for dehydration, and control the drying temperature at 110-125°C for later use; put the raw material dimethylol propionic acid in an oven for 100-150 minutes, and control the drying temperature at 110°C ~125°C, set aside; dehydrate the raw materials triethylamine and butanone with molecular sieve for 5-7d, set aside;

[0026] 2) Add toluene diisocyanate, dibutyltin dilaurate, polypropylene glycol, triethylamine and butanone dehydrated in step 1) into the first reaction kettle at room temperature, and then raise the temperature to 58~70°C to make They are mixed and reacted in the first reactor until the value of -NCO% in the system does not change, and the primary product is obtained for subsequent use;

[0027] 3) Control the temperature at 80°C, add dimethylolpropionic acid dried in step 1)...

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Abstract

The invention discloses a preparation method of a flexible protecting film composition. The preparation method comprises the following procedures: (1) dewatering and drying the raw materials; (2) adding toluene diisocynate and the like into a first reaction kettle at the room temperature, so as to obtain a primary product; (3) sequentially adding dimethylolpropionic acid and triethylamine into the primary product, so as to obtain an aromatic waterborne polyurethane emulsion; (4) adding silica sol and the aromatic waterborne polyurethane emulsion into a third reaction kettle at the room temperature, so as to obtain a mixed emulsion; (5) 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 (6) adding the mixed emulsion into the mixed base solution, so as to obtain the flexible protecting film composition. By utilizing the flexible protecting film composition prepared by virtue of the preparation method, a protected object can be effectively closed and protected, and the pollution, corrosion and damage to the object are prevented. Meanwhile, the flexible protecting film composition further has relatively high stability, relatively strong cohesion, good peelable property and relatively high film strength.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a preparation method of a tough protective 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 have the...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D183/12C09D183/04C09D133/02C09D7/12C09D5/08C08G18/10C08G18/66C08G18/48C08G18/32C08G18/34
CPCC09D175/08C08G18/10C08G18/3228C08G18/348C08G18/48C08G18/6685C08G18/6692C08G2150/90C08L2205/025C08L2205/035C09D5/08C09D7/62
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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