Ultraviolet light/sunlight cured fluorine-free antifouling coating and preparation method thereof

An antifouling coating and sunlight technology, applied in antifouling/underwater coatings, coatings, polyurea/polyurethane coatings, etc., can solve the limitations of wide application of antifouling coatings, high temperature curing of fluorine-free antifouling coatings , increase production cost and time and other issues, to achieve the effect of fast UV curing speed, fast curing speed and excellent antifouling performance

Active Publication Date: 2018-09-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the current preparation of fluorine-free antifouling coatings has disadvantages such as high temperature curing and dependence on substrates.
The above shortcomings not only greatly waste energy, increase production costs and time, but also limit its use on heat-sensitive materials, seriously limiting the wide application of antifouling coatings

Method used

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  • Ultraviolet light/sunlight cured fluorine-free antifouling coating and preparation method thereof
  • Ultraviolet light/sunlight cured fluorine-free antifouling coating and preparation method thereof
  • Ultraviolet light/sunlight cured fluorine-free antifouling coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: UV-cured fluorine-free antifouling coating A

[0035] Mix 40g of IPDI and 144g of hydroxyl-terminated polysiloxane evenly, add 0.28g of dibutyltin dilaurate to the system, raise the temperature to 85°C, react for 2 hours, cool down to 80°C, and then add 0.28g of polymerization inhibitor methoxyphenol and 90g of pentaerythritol triacrylate, and then add 56g of propylene glycol methyl ether acetate to adjust the viscosity of the system, keep the temperature for 2h, and obtain the low surface energy prepolymer A.

[0036] After cooling the low surface energy prepolymer to room temperature, add 25g of photoinitiator 1773 and 200g of pentaerythritol triacrylate, stir evenly, coat on the substrate, and obtain a fluorine-free antifouling coating after 35s of 2kw UV curing a.

Embodiment 2

[0037] Example 2: UV-cured fluorine-free antifouling coating B

[0038]Mix 40g of IPDI and 144g of hydroxyl-terminated polysiloxane evenly, add 0.2g of stannous octoate to the system, raise the temperature to 80°C, react for 2 hours, cool down to 75°C, and then add 0.2g of polymerization inhibitor hydroquinone to the system And 26g of hydroxypropyl methacrylate, then add 40g of butyl acetate to adjust the viscosity of the system, keep it warm for 2h, and obtain the low surface energy prepolymer B.

[0039] After cooling the low surface energy prepolymer to room temperature, add 16g of photoinitiator TPO-L and 120g of pentaerythritol triacrylate, stir evenly, apply on the substrate, and obtain fluorine-free antifouling coating after 50s of 2kw UV curing Layer B.

Embodiment 3

[0040] Example 3: UV-cured fluorine-free antifouling coating C

[0041] Mix 30g HDI and 143g hydroxyl-terminated polysiloxane evenly, add 0.3g dibutyltin dilaurate to the system, raise the temperature to 85°C, react for 2.5h, cool down to 80°C, add 0.4g polymerization inhibitor A to the system Oxyphenol and 72g of pentaerythritol triacrylate were reacted for 1 hour, then 40g of hydroxyethyl methacrylate was added to adjust the viscosity of the system, and then kept for 2 hours to obtain low surface energy prepolymer C.

[0042] After cooling the low surface energy prepolymer to room temperature, add 15g of photoinitiator 1173 and 150g of hexanediol diacrylate, stir evenly, apply on the substrate, and obtain fluorine-free antifouling coating after 2min of 1kw UV curing Layer C.

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Abstract

The invention discloses an ultraviolet light/sunlight cured fluorine-free antifouling coating and a preparation method thereof. The preparation method is characterized in that firstly, the synthesis of a low surface energy prepolymer is performed; an isocyanate type compound and hydroxyl containing polysiloxane are uniformly mixed and are heated to 50 to 90 DEG C; a catalyst is added for reaction;a solvent and/or a reactive diluent are/is added; then, a hydroxyl containing acrylate monomer and a polymerization inhibitor are added; the temperature is maintained to be 50 to 90 DEG C; the reaction is performed for 0.5 to 4h; the low surface energy prepolymer is prepared; then, the reactive diluent or a photosensitive group containing urethane acrylate affixture is added into the low surfaceenergy prepolymer; a photoinitiator is added; through ultraviolet light curing or sunlight curing, the fluorine-free antifouling coating is obtained. The use of expensive fluorine-containing compoundsand fluorine-containing solvents is avoided; the coating can be cured under the room temperature condition; the ultraviolet light curing time is short; the production cost is effectively reduced; thecoating has excellent antifouling performance and is applicable to various substrates.

Description

technical field [0001] The invention relates to a fluorine-free antifouling coating, in particular to a fluorine-free antifouling coating cured by ultraviolet light or sunlight and a preparation method thereof. Background technique [0002] Antifouling coating is one of the research hotspots in recent years. Due to its low surface energy, the antifouling coating can resist water and oily stains and keep the surface of the substrate clean. It can be applied to aircraft anti-icing, pipeline anti-blocking, and ship anti-microbial adhesion. It is also suitable for construction , public facilities, household equipment and other aspects of self-cleaning. It can be seen that the extensive use of antifouling coatings can keep the environment clean to the greatest extent, saving more cleaning time and costs. Therefore, antifouling coatings have great market demand and good development prospects. [0003] To achieve the antifouling effect of the coating, fluorine-containing or sili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/16C09D7/20C08G18/75C08G18/67C08G18/61
CPCC08G18/61C08G18/673C08G18/755C09D5/1662C09D7/20C09D175/04
Inventor 傅和青钟细明胡恒逢沈丽香
Owner SOUTH CHINA UNIV OF TECH
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