CN-121991579-A - Efficient antibacterial photo-curing powder coating and preparation method thereof

Abstract

The invention belongs to the technical field of powder coating preparation, and particularly relates to a high-efficiency antibacterial photo-curing powder coating and a preparation method thereof, wherein the coating comprises, by weight, 100 parts of unsaturated photo-curing resin, 3-9 parts of long-chain unsaturated quaternary ammonium salt, 3-5 parts of photoinitiator, 0.1-0.5 part of polymerization inhibitor, 3-10 parts of filler and 1-2.5 parts of flatting agent. The long-chain unsaturated quaternary ammonium salt in the system can migrate and concentrate on the surface layer of the coating in the hot leveling stage, and is firmly anchored in the coating matrix after solidification, so that the long-chain unsaturated quaternary ammonium salt is difficult to escape, thereby endowing the coating with durable and stable antibacterial function.

Inventors

• TAO WENHONG
• ZHENG LUYAO
• JIANG WENJUN
• ZHANG BINJIE
• SHI TAO
• WANG QI

Assignees

• 常州市艾森塑料科技有限公司

Dates

Publication Date

20260508

Application Date

20260306

Claims (9)

1. 1. The high-efficiency antibacterial photo-curing powder coating is characterized by comprising, by weight, 100 parts of unsaturated photo-curing resin, 3-9 parts of long-chain unsaturated quaternary ammonium salt, 3-5 parts of photoinitiator, 0.1-0.5 part of polymerization inhibitor, 3-10 parts of filler and 1-2.5 parts of leveling agent.
2. 2. The high-efficiency antibacterial photo-curing powder coating as set forth in claim 1, wherein the unsaturated photo-curing resin is one or a combination of more of UVECOAT3001, UVECOAT3003, UVECOAT9010, eternal6071, eternal 6172-1.
3. 3. The high performance antimicrobial photo-curable powder coating of claim 1, wherein the long chain unsaturated quaternary ammonium salt comprises methacryloxyethyl dimethyl dodecyl ammonium bromide, methacryloxydodecyl bromopyridine.
4. 4. The high-efficiency antibacterial photo-curing powder coating according to claim 1, wherein the filler is one or a combination of more of talcum powder, titanium dioxide and hydrophobic fumed silica, the polymerization inhibitor is p-hydroxyanisole, and the leveling agent is dimethyl silicone oil containing propenyl.
5. 5. A method for preparing the high-efficiency antibacterial photo-curing powder coating according to any one of claims 1 to 4, which is characterized in that ultraviolet irradiation curing is carried out after the high-efficiency antibacterial photo-curing powder coating is uniformly sprayed on the surface of a substrate through an electrostatic spray gun and is leveled for 25 to 30 minutes at the temperature of 100 to 110 ℃.
6. 6. The method for preparing the high-efficiency antibacterial photo-curing powder coating as claimed in claim 5, which is characterized in that: the spraying amount during spraying is 90g/m 2 ～180g/m 2 .
7. 7. The method for preparing the efficient antibacterial photo-curing powder coating according to claim 5, wherein the ultraviolet irradiation curing strength is 80W/cm <2 > -130W/cm <2 >, and the irradiation time is 3-5 min.
8. 8. The method of preparing a high-efficiency antibacterial photo-curing powder coating according to claim 5, wherein the preparation and processing operations of the high-efficiency antibacterial photo-curing powder coating are that the unsaturated photo-curing resin, the long-chain unsaturated quaternary ammonium salt, the photoinitiator, the polymerization inhibitor and the leveling agent are fully mixed and dispersed, and then melted, blended, extruded and granulated by a double-screw extruder, and the obtained granules are crushed.
9. 9. The method for preparing a high-efficiency antibacterial photo-curing powder coating according to claim 8, wherein the granules are crushed to 30-50 μm.

Description

Efficient antibacterial photo-curing powder coating and preparation method thereof Technical Field The invention belongs to the technical field of powder coating preparation, and particularly relates to a high-efficiency antibacterial photo-curing powder coating and a preparation method thereof. Background The antibacterial powder coating is a functional coating with antibacterial effect, which is formed by film formation of the powder coating, and after microorganisms such as bacteria are attached to the coating product, antibacterial components in the coating can destroy the normal metabolism and reproductive capacity of the microorganisms through contact action, so that the microorganisms are deactivated, and the antibacterial purpose is achieved. The coating has the following core requirements on antibacterial components, namely, the antibacterial components are required to be uniformly dispersed in the coating to ensure that the whole coating has antibacterial potential, secondly, the antibacterial components are required to have moderate migration capacity to the surface of the coating so as to effectively contact and kill microorganisms, thirdly, the migration capacity of the antibacterial components is required to be controlled within a reasonable range, the too strong migration capacity is easy to cause early precipitation failure of the antibacterial agent, and the too weak migration capacity reduces the antibacterial efficiency of the surface. In the prior art, inorganic antibacterial agents have excellent antibacterial effect, but are easy to agglomerate in a coating matrix, migration and precipitation phenomena are obvious, the antibacterial durability of the whole coating is affected, the mechanical property of the coating is obviously reduced, the agglomeration problem is reduced, the too strong migration capability of small molecular organic antibacterial agents leads most antibacterial agents to be insufficient in function, namely migrate to the surface of the coating and lose effectiveness, so that the antibacterial durability is poor, and if the antibacterial groups are fixed on a polymer macromolecular chain through chemical grafting, the migration and precipitation of the antibacterial agents can be avoided, but the antibacterial groups are far away from the surface of the coating due to the loss of the migration capability, the overall utilization rate of the antibacterial agents is too low, and the antibacterial function cannot be effectively exerted. Disclosure of Invention In order to solve the technical problems, the application provides an antibacterial modification scheme of a photocuring powder coating, which can not only generate efficient antibacterial intervention on the surface of the coating, but also avoid invalidation after migration of an antibacterial agent, wherein the photocuring powder coating comprises 100 parts by weight of unsaturated photocuring resin, 3-9 parts by weight of long-chain unsaturated quaternary ammonium salt, 3-5 parts by weight of photoinitiator, 0.1-0.5 part by weight of polymerization inhibitor, 3-10 parts by weight of filler and 1-2.5 parts by weight of leveling agent; Wherein the unsaturated photo-curing resin is photo-curing unsaturated acrylate resin, such as UVECOAT3001, UVECOAT3003, UVECOAT9010, eternal6071, eternal6172-1, etc.; the long-chain unsaturated quaternary ammonium salt is acryloyloxy long-chain alkyl quaternary ammonium salt, the number of the repeated units of the long-chain alkyl is 10-18, such as methacryloyloxy ethyl dimethyl dodecyl ammonium bromide, methacryloyloxy dodecyl bromopyridine and the like; The long-chain unsaturated quaternary ammonium salt is taken as an antibacterial component in the scheme, and the positively charged quaternary ammonium salt group is combined with negatively charged bacterial microbial cells through electrostatic attraction to inactivate the negatively charged bacterial microbial cells, so that an antibacterial effect is achieved; in addition, the photo-curing powder coating must keep the coating heated and insulated for a long time after the spraying is finished, so that the coating is melted and softened and sufficiently leveled, and then is subjected to photo-curing shaping, otherwise, the problems of insufficient curing, rough morphology, poor surface quality and the like of the coating are caused. In the heat leveling process before curing, the small molecular antibacterial agent in the coating is easy to be driven by the heat effect to migrate to the surface of the coating, so that the antibacterial active ingredient is disabled in advance. In contrast, the scheme selects the long-chain unsaturated quaternary ammonium salt as a monomer molecule on the antibacterial agent, and the long-chain unsaturated quaternary ammonium salt dispersed in a coating system has a tendency to migrate to the surface of the coating due to continuous heating in the heat leveling process after powder coating s