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Room-temperature-curing solvent-free anti-doodling coating

A room temperature curing, solvent-free technology, applied in the direction of coating, etc., can solve the problem of easy separation of fluorine and silicon

Pending Publication Date: 2022-02-01
GUANGZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Anti-graffiti coatings that physically mix fluorine or silicon components will fail after a period of use, while anti-graffiti coatings that introduce fluorine-silicon components through chemical grafting are easy to dissolve due to the low surface tension of fluorine-silicon components. Phase separation, so the selection of solvent, the control of the amount of addition, the transparency of the coating and the curing conditions of the coating have caused certain challenges to the application of anti-graffiti coatings

Method used

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  • Room-temperature-curing solvent-free anti-doodling coating
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  • Room-temperature-curing solvent-free anti-doodling coating

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experiment example

[0051] 1, take water, peanut oil, pump oil, crude oil, diiodomethane, n-hexadecane and ethanol as measuring liquid respectively, measure the contact angle and sliding angle of different liquids on the anti-graffiti coating described in embodiment 1, contact angle The required test liquid is 2 μL, and the test liquid required for the sliding angle is 20 μL. For the measurement results, see the attached Figure 1-3 , as can be seen from the figure, the contact angles of water, peanut oil, pump oil, crude oil, diiodomethane, n-hexadecane and ethanol on the anti-graffiti coating are all below 105°, and the sliding angle is suitably below 20°, even The sliding angle of ethanol on the coating is below 5°, and below 15°, these liquids can slide off quickly in a short time, so as to achieve the effect of antifouling and antigraffiti.

[0052] When dihydroxy-terminated hydroxysilicone is covalently linked into the network, it does not behave as a liquid at the macroscopic level, but st...

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Abstract

The invention provides a room-temperature-curing solvent-free anti-doodling coating, belonging to the technical field of functional paints. The anti-doodling coating comprises hydroxyl silicone oil, a silane coupling agent and a catalyst, wherein the hydroxyl silicone oil is low-molecular-weight dihydroxyl-terminated hydroxyl silicone oil, and the silane coupling agent comprises an amino silane coupling agent. The anti-doodling coating comprises also comprises an epoxy group silane coupling agent or an isocyanate group silane coupling agent. According to the invention, a layer of highly transparent and wear-resistant antifouling coating can be formed on the surfaces of various base materials at room temperature through a simple process, graffiti marks can be easily removed only by using tissues, and the anti-graffiti performance of the coating can be maintained after multiple times of wiping, so the surfaces of the base materials are easy to clean.

Description

technical field [0001] The invention relates to the technical field of functional coatings, in particular to a solvent-free anti-graffiti coating cured at room temperature. Background technique [0002] Graffiti can be seen everywhere in life, ranging from the graffiti on indoor walls and furniture to the large scale of illegal and deliberate graffiti on walls and facilities in public places, and even smearing and destroying tourist attractions. Because graffiti is difficult to remove , has seriously affected the city's beauty and caused trouble and loss to people. [0003] To solve this problem, in the prior art, the anti-graffiti effect is mostly achieved by introducing fluorine or silicon low surface energy components into polyurethane, epoxy resin and acrylic resin through physical mixing or chemical grafting. Anti-graffiti coatings that physically mix fluorine or silicon components will fail after a period of use, while anti-graffiti coatings that introduce fluorine-si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/63
CPCC09D183/04C09D7/63C08L2201/10C08K5/544C08K5/5435C08K5/5465
Inventor 吴旭赵丽建张铱淳徐秀彬于丹凤
Owner GUANGZHOU UNIVERSITY
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