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A kind of anti-fouling and anti-graffiti additive and its application

An anti-graffiti and anti-graffiti technology, applied in anti-fouling/underwater coatings, coatings, paints containing biocides, etc., can solve problems such as difficult UV curing coatings, perfluoropolyether detachment, and unsatisfactory effects.

Active Publication Date: 2020-11-10
太仓中化环保化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this compound mainly contains polyurethane structure, alcoholic hydroxyl group and other groups, which is difficult to be applied in UV photocurable coatings, and has poor compatibility in UV photocurable coatings, making it difficult to exert its antifouling and antigraffiti functions
[0005] Another example is the invention patent CN2005800145739 which discloses a perfluoropolyether modified acrylate with antifouling effect. After the compound disclosed in this patent is applied to the coating, the oxygen in the air will cause the curing process of the coating during the UV curing process. Oxygen inhibition effect, and the adhesion and compatibility between this compound and the paint film are poor, and then the perfluoropolyether will continue to detach from the paint film surface during the use of the product, which will eventually lead to the loss of the antifouling function of the paint film The durability becomes poor, so although it achieves a certain antifouling and abrasion resistance, the effect is still not ideal

Method used

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  • A kind of anti-fouling and anti-graffiti additive and its application
  • A kind of anti-fouling and anti-graffiti additive and its application
  • A kind of anti-fouling and anti-graffiti additive and its application

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preparation example Construction

[0058] The preparation method of the antifouling and antigraffiti assistant of the present invention, described preparation method comprises the following steps:

[0059] 1) Hydrolyze the alkoxysilane coupling agent containing both primary and secondary amino groups to obtain the primary product, and then undergo polycondensation reaction of the obtained primary product with siloxane ring body and organosilicon end-capping agent in the presence of the first catalyst , generate amino silicone oil product 1;

[0060] 2) making the amino silicone oil product 1 prepared in step 1) undergo amidation reaction with the perfluoropolyether compound to generate product 2;

[0061] 3) reacting the isocyanate compound and the hydroxyacrylate compound in a solvent in the presence of a second catalyst, in the presence of a polymerization inhibitor, to generate product 3;

[0062] 4) Add the product 3 prepared in step 3) to the product 2 prepared in step 2), and react to generate the antifo...

Embodiment 1

[0094] This embodiment provides an antifouling and antigraffiti additive 1# sample (PFPE-1), the structural formula of PFPE-1 is as follows:

[0095]

[0096] Wherein, a=11, g=8, PTHF represents polytetrahydrofuran ether glycol molecular chain segment.

[0097] The preparation method of PFPE-1 is as follows:

[0098] Add 21g of N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane and 20g of desalted water into a 1L three-necked flask, stir the hydrolysis reaction at 50°C for 5 hours, and slowly turn on the negative pressure and dehydration to obtain dry silane low boilers; then add potassium hydroxide powder (0.02g), octamethylcyclotetrasiloxane (60g) and hexamethyldisiloxane (16.2g), slowly heat up to 130°C, Stirring reaction time is 4 hours, finally through the process of vacuum removal of low boilers, dry amino silicone oil is obtained; under the protection of nitrogen, add perfluoropolyether methyl ester (200g, structural formula as shown below, wherein R f Select the ...

Embodiment 2

[0104] This embodiment provides an antifouling and antigraffiti additive 2# sample (PFPE-2).

[0105] According to the steps and process shown in Example 1, the polytetrahydrofuran ether glycol molecular weight is replaced by 2000g / mol, the quality is replaced by 200g, and the solvent butyl acetate quality is replaced by 1150g, and the remaining conditions and quality are the same as in Example 1. The antifouling and antigraffiti additive 2# sample (PFPE-2) was obtained.

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Abstract

The invention discloses an antifouling anti-graffiti adjuvant and an application thereof. Through introduction of an organopolysiloxane chain, multiple photocurable active groups and a -CO-NH- group to the perfluoropolyether group as a base and combination of the groups and the base through specific nitrogen atoms, the good compatibility and adhesion of the adjuvant and the UV paint film are obtained, the perfluoropolyether chain migration is thorough and the anti-fouling performances and wear resistance of the UV paint are improved. The antifouling anti-graffiti adjuvant can be used in the antifouling anti-graffiti UV curing coating.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, in particular to an auxiliary agent for UV photocuring coatings, in particular to an antifouling and antigraffiti auxiliary agent and its application. Background technique [0002] UV light-curing coatings have the advantages of fast curing speed, energy saving, no volatile organic compounds (VOC), less environmental pollution, good performance of cured products, and are suitable for high-speed automatic production. They are the main substitutes for traditional coatings. More and more attention has been paid by the paint industry. However, since the paint film formed by UV paint contains a large amount of polar functional groups such as carbonyl groups, the anti-fouling and anti-graffiti properties of the paint film are poor. Improving the anti-fouling, anti-sticking and anti-graffiti properties of the surface of the existing UV coating film has always been a hot and difficult point in co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/67C08G18/61C08G18/48C08G18/10C09D5/16
CPCC08G18/10C08G18/4854C08G18/673C08G18/755C09D5/1637C08G18/61
Inventor 徐涛郑尧波马腾飞
Owner 太仓中化环保化工有限公司