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Films or structural exterior materials using coating composition having self-cleaning property and preparation method thereof

A self-cleaning, composite technology, applied in the direction of radiation-absorbing coatings, anti-fouling/underwater coatings, coatings, etc., can solve the pollution that cannot effectively prevent urban dust, is not desirable, cannot effectively purify stains and pollution to achieve excellent self-cleaning performance and excellent pollution resistance

Inactive Publication Date: 2011-05-25
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of using a photocatalyst coating has a disadvantage in that a primer needs to be applied to a plastic substrate formed of a thermoplastic resin or the like before coating the photocatalyst, since photocatalysts generally have the possibility of decomposing organic substances. extra steps for
Therefore, this heteropolymer cannot effectively clean stains and pollutants formed by mineral dust deposited on the surface
In addition, since other readily available hydrophilic paints have a contact angle with water of 50 to 70 degrees, there is a problem that they cannot effectively prevent pollution due to dust in cities.
In other words, the whole process is not advisable in terms of both cost and work area

Method used

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  • Films or structural exterior materials using coating composition having self-cleaning property and preparation method thereof
  • Films or structural exterior materials using coating composition having self-cleaning property and preparation method thereof
  • Films or structural exterior materials using coating composition having self-cleaning property and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0103] [Examples 1 to 7] Coating composition, and advertising paper and building exterior materials using the coating composition preparation

Embodiment 1

[0105] 1-1. Coating composition

[0106] Add 9 wt% of silica dispersion (MA-ST purchased from TLSAN chemical company) with 30% solids content to the reactor, which includes dispersion in methanol (2.7 wt% of silica and 6.3 wt% of methanol) 0.09 wt% of silica particles (FineSil, Tokuyama Co.) with an average particle diameter of 1.7 μm; 0.01 wt% of nitric acid at a concentration of 10%; 1.01 wt% 18 wt% methanol; and 1.89 wt% glycidoxypropyltrimethoxysilane. After the mixture was reacted at 50° C. for 24 hours, 10 wt % of EA (ethyl acetate), 54.5 wt % of MEK (methyl ethyl ketone) and 5 wt % of toluene were sequentially added. Then, the above mixture was stirred for 1 hour to form a coating composition.

[0107] 1-2. Preparation of building exterior materials with pollution resistance

[0108] The coating composition obtained according to Example 1-1 was applied at a dry thickness of 2 μm to vinyl siding products (LG Chemical Co., Ltd., LG Sideon) to produce stain-resista...

Embodiment 2

[0110] Example 1 was repeated to prepare vinyl siding with stain resistance, except that a vinyl siding product (LG Chemical Corporation, LG Sideon) was coated with the coating composition at room temperature without the embossing step.

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Abstract

Disclosed is a coating composition comprising: (a) hydroxy group-containing inorganic particles having an average particle diameter of between 5 and 30 nm; (b) hydroxy group- containing inorganic particles having an average particle diameter of between 0.2 and 5 [mu]m; (c) an organosilane compound represented by the formula of RnSi(OR') 4-n (wherein R is a C1-C8 aminoalkyl group, glycidoxyalkyl group or isocyanatoalkyl group; R'is a C1-C6 lower alkyl group; and n is an integer of between 0 and 3); and (d) a solvent. A method for preparing the above coating composition, a substrate such as film or structural exterior material, having excellent self-cleaning property and staining resistance by using the above coating composition and methods for producing the same are also disclosed. The coating composition using hydroxy group-containing inorganic particles can improve the initial hydrophilicity of conventional coating agents. Additionally, the coating composition can form a hydrophilic coating layer having a contact angle with water of 30 DEG or less by using two kinds of inorganic particles having a different particles diameter. Particularly, the coating composition uses an organic solvent having erosive property to a substrate to be coated and a low boiling point, and thus can be applied to a conventional production line for structural exterior materials without adding a separate coating line. Therefore, the coating composition can provide structural materials having hydrophilicity, excellent self-cleaning property and long service life, when coated on substrates such as vinyl sidings.

Description

technical field [0001] The present invention relates to a coating composition having self-cleaning performance, a substrate such as a film or an exterior material for building, which has excellent self-cleaning performance and stain resistance by using the composition, and a method for preparing the same. Background technique [0002] Generally, when advertising films and architectural exterior materials are exposed to outdoor environments for a long time, there are serious problems that the films and architectural exterior materials are contaminated by dust, smoke, and exhaust gas, and are discolored due to ultraviolet rays. Therefore, outdoor films and exterior materials are particularly required to exhibit physical properties such as self-cleaning performance and weather resistance, as well as long-term reliability. [0003] Contamination of the surface of outdoor membranes and building exterior materials is mainly caused by dust in the air, combustion products such as ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/00C09D5/16C09D5/32C09D7/12C09D183/00C09D183/02C09D183/04
CPCC09D183/04C09D5/00C09D5/16C09D183/02
Inventor 姜阳求李承宪洪瑛晙金正训李惠贞辛相镐张城勋申弘澈张影来李衍玭
Owner LG CHEM LTD
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