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Fogdrop-proof coating combination and preparation method thereof

A composition and coating technology, which can be used in antifouling/underwater coatings, cellulose derivative coatings, and biocide-containing paints, etc. Problems such as difficult processing and low thermal stability, to achieve the effects of good placement stability, simple preparation method and good dispersibility

Active Publication Date: 2007-09-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the internal addition method is generally used in our country, but there are some problems: (1) the transparency is reduced; (2) the thermal stability is low; (3) the strength of the film is reduced; (4) due to the polarity of the anti-fogging agent and the matrix resin The difference is very large, and it is easy to migrate and be lost by water erosion, so the non-drip life of polyethylene film is short, generally 3-6 months; (5) Difficult to process, because the anti-fogging agent is incompatible with polyethylene , difficult to add, causing the film blowing machine screw to slip
But its disadvantage is that the anti-fog dropper lasts for only 6 months after one spray
However, the coating film obtained from this anti-fogging agent composition has insufficient adhesion and abrasion resistance to molded articles, and cannot provide stable anti-fogging for a long period of time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Aluminum sol solution preparation

[0035] Add 10kg water, 3kg colloidal alumina (Al 2 o 3 Content 30%), stir at 25°C until fully mixed.

[0036] (2) Preparation of nonionic surfactant solution

[0037] Take another container and add 1kg of water and 0.3kg of polyoxyethylene sorbitan monooleate, heat to 50°C and stir to dissolve to form a uniform solution.

[0038] (3) Adhesive solution preparation

[0039] Take another container and add 1kg of water and 0.02kg of carboxyethyl cellulose, and heat to 40°C to dissolve into a homogeneous solution.

[0040] (4) Preparation of coating composition

[0041] Add the prepared nonionic surfactant solution (2) into the aluminum sol solution (1), stir to disperse, then add the binder solution (3), stir until uniformly dispersed, and then add 85kg of water.

Embodiment 2

[0043] (1) Aluminum sol solution preparation

[0044] Add 20kg water, 2.5kg colloidal alumina (Al 2 o 3 % content 25), stir at 25°C until fully mixed.

[0045] (2) Preparation of nonionic surfactant solution

[0046] Take another container and add 2kg of water and 0.4kg of polyoxyethylene sorbitan monostearate, heat to 50°C and stir to dissolve to form a uniform solution.

[0047] (3) Adhesive solution preparation

[0048] Take another container and add 2kg of water and 0.04kg of hydroxymethylcellulose, and heat to 40°C to dissolve into a homogeneous solution.

[0049] (4) Preparation of coating composition

[0050] Add the prepared nonionic surfactant solution (2) into the aluminum sol solution (1), stir to disperse, then add the binder solution (3), stir until uniformly dispersed, and then add 75kg of water.

Embodiment 3

[0052] (1) Aluminum sol solution preparation

[0053] Add 10kg water, 0.96kg colloidal alumina (Al 2 o 3 % is 16), stirred at 25°C until fully mixed.

[0054] (2) Preparation of nonionic surfactant solution

[0055] Take another container and add 1kg of water and 0.5kg of polyoxyethylene sorbitan palmitic acid monoester, heat to 50°C and stir to dissolve to form a uniform solution.

[0056] (3) Adhesive solution preparation

[0057] Take another container and add 1kg of water and 0.015kg of hydroxypropyl cellulose, and heat to 40°C to dissolve into a homogeneous solution.

[0058] (4) Preparation of coating composition

[0059] Add the prepared nonionic surfactant solution (2) into the aluminum sol solution (1), stir and disperse, then add the binder solution (3), stir until uniformly dispersed, and then add 87kg of water.

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PUM

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Abstract

The invention relates to a anti-fogdrop painting composition, which includes four components of A, B, C and water, A is colloid aluminum oxide and content thereof is 0.9-3.6%, B is polyoxyethylene-containing non-ion surfactant and content thereof is 0.1-0.5%, C is water-soluble cellulose derivative adhesive and content thereof is 0.01-0.04%, and residual component is water. The composition possesses good dispersivity and placing stability, low viscosity, and small particle diameter; can reach to painting demand without grinding of colloid mill; and can endow thin film after coating to polyethylene thin film with good initial anti-fog property and long anti-drop validity period of at least three years. The invention also discloses preparation method for the anti-fogdrop painting composition, which is simple, low-cost and pollution-free to environment.

Description

technical field [0001] The invention relates to an anti-fog drop coating composition and a preparation method thereof, which is especially suitable for anti-fog drop coating of polyethylene films. Background technique [0002] Polyethylene resin is a kind of hydrophobic resin. When the surface temperature of a film made of polyethylene is lower than the dew point temperature of the environment, dew point condensation will occur, making the surface of the film atomized and dew droplets attached. When polyethylene film is used as a covering material for greenhouses and agricultural cultivation, water vapor will condense on the inner surface of the film to form water droplets. Each water droplet is a small lens, and the water droplets can reflect or refract sunlight and act as a lens. It causes light and heat to concentrate on the local part of the crop tissue, causing burns on the crop leaves. A large number of water droplets adhere to the surface of the film and are difficul...

Claims

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Application Information

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IPC IPC(8): C09D101/08C09D5/16
Inventor 谈敦礼郭义张庆国杨世元刘鹏王美玲
Owner PETROCHINA CO LTD
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