阅读说明：本技术 一种低温成膜的氟碳涂料及其制备方法 (Low-temperature film-forming fluorocarbon coating and preparation method thereof ) 是由 李铜玲 于 2018-06-20 设计创作，主要内容包括：本发明公开了一种低温成膜的氟碳涂料及其制备方法。该氟碳涂料包括主漆和固化剂,所述主漆和固化剂的重量比为120-150：1；主漆中通过对蒙脱土改性处理后,提高了氟碳涂料的柔韧性和抗老化性能,固化剂采用无机凝胶材料,保证氟碳涂料的粘附性能的前提下,减少了对环境的危害。与现有技术相比,本发明低温成膜的氟碳涂料成分简单,色泽鲜亮,表面张力低,耐候性强,且常温固化快,解决了高温成膜的问题。(The invention discloses a fluorocarbon coating with a low-temperature film forming function and a preparation method thereof. The fluorocarbon coating comprises a main paint and a curing agent, wherein the weight ratio of the main paint to the curing agent is (120-) -150: 1; the flexibility and the ageing resistance of the fluorocarbon coating are improved after montmorillonite is modified in the main paint, and the harm to the environment is reduced on the premise of ensuring the adhesion performance of the fluorocarbon coating because the curing agent is an inorganic gel material. Compared with the prior art, the low-temperature film-forming fluorocarbon coating disclosed by the invention is simple in components, bright in color, low in surface tension, strong in weather resistance and fast in normal-temperature curing, and solves the problem of high-temperature film forming.)

1. The fluorocarbon coating capable of forming a film at a low temperature is characterized by comprising a main paint and a curing agent, wherein the weight ratio of the main paint to the curing agent is 120-150: 1; the main paint is prepared by mixing the following components in parts by weight: 35-45 parts of fluorocarbon resin, 1-4 parts of nano titanium dioxide, 2-8 parts of dioctyl phthalate, 12-28 parts of hydroxyl polyester, 2-5 parts of epoxy resin, 25-37 parts of montmorillonite, 1-3 parts of barium sulfate, 1-4 parts of fly ash, 48-56 parts of polycarbonate diol, 15-28 parts of n-butyl alcohol, 20-38 parts of hydroxymethyl cellulose, 1-3 parts of lubricant, 1-3 parts of bactericide and 1-3 parts of flatting agent; the curing agent comprises the following components in parts by weight: 1-5 parts of inorganic cementing material, 2-8 parts of butyl acetate and 20-30 parts of polyethylene methanol.

2. A low temperature film forming fluorocarbon coating as claimed in claim 1, wherein said weight ratio of main paint to curing agent is 120: 1.

3. a low-temperature film-forming fluorocarbon coating as claimed in claim 1, wherein said main paint is prepared by mixing the following components in parts by weight: 42 parts of fluorocarbon resin, 1 part of nano titanium dioxide, 6 parts of dioctyl phthalate, 20 parts of hydroxyl polyester, 3 parts of epoxy resin, 32 parts of montmorillonite, 2 parts of barium sulfate, 2 parts of fly ash, 50 parts of polycarbonate diol, 22 parts of n-butyl alcohol, 30 parts of hydroxymethyl cellulose, 2 parts of lubricant, 1 part of bactericide and 2 parts of flatting agent.

4. A low temperature film forming fluorocarbon coating as claimed in claim 1, wherein said curing agent comprises the following components in parts by weight: 2 parts of inorganic cementing material, 6 parts of butyl acetate and 6 parts of polyethylene methanol.

5. The preparation method of the low-temperature film-forming fluorocarbon coating based on claim 1 is characterized by comprising the following steps: step 1, mixing fluorocarbon resin, nano titanium dioxide, dioctyl phthalate, hydroxyl polyester, epoxy resin and montmorillonite, putting into a ball mill for grinding, adding hydroxymethyl cellulose, uniformly stirring, then sequentially adding barium sulfate, polycarbonate diol, fly ash, n-butyl alcohol, a lubricant, a bactericide and a leveling agent, and magnetically stirring to obtain a main paint; step 2, dissolving butyl acetate in polyvinyl methanol, and adding an inorganic cementing material after ultrasonic stirring to obtain a curing agent; and 3, mixing the main paint and the curing agent, and uniformly stirring to obtain the fluorocarbon coating.

Technical Field

The invention belongs to the field of fluorocarbon coatings, and particularly relates to a low-temperature film-forming fluorocarbon coating and a preparation method thereof.

Background

Fluorocarbon coating is prepared by processing, modifying and grinding fluorine-containing copolymer resin or copolymer of fluoroolefin and other monomers as a main film forming substance, at present, widely applied fluororesin coatings mainly comprise tetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF) and the like, and the coatings have excellent weather resistance, solvent resistance and high temperature resistance, but need to be baked at high temperature to melt and form a film, are not suitable for field construction, and limit the development of the coatings. In addition, the organic solvent type fluororesin coating is widely applied, the fluororesin coating dissolved in an organic solvent can form a film at a lower temperature, the application range of the coating is expanded, such as vinylidene fluoride/tetrafluoroethylene/hexafluoropropylene terpolymer, vinylidene fluoride/hexafluoropropylene binary copolymer coating and the like, but the accumulation of the organic solvent in a marine environment limits the full utilization of the coating due to the poison of the marine environment and marine organisms. The development and application of water-soluble fluorocarbon coatings gradually attract people's attention, but the types of the current water-soluble fluorocarbon coatings are single, and the film forming effect is not ideal.

Application number 201710984615.6, which is named as fluorocarbon powder coating, comprises the following raw materials in parts by mass: 100-150 parts of PVDF resin, 100-150 parts of FEVE resin, 50-60 parts of acrylic resin, 40-50 parts of carboxyl-terminated polyester resin, 20-30 parts of pigment, 22-25 parts of curing agent, 8-12 parts of flatting agent, 4-6 parts of auxiliary agent, 3-4 parts of benzoin and 0.5-3 parts of nano material; the nano material comprises nano Zr0₂35% of nano ZnO, 20% of nano Si0₂The content is 35 percent, and the content of the nano SiC is 10 percent; the curing agent is an anhydride curing agent. Although the fluorocarbon powder coating has good weather resistance, strong chemical resistance and good gloss and color retention, the waterproofness and the flexibility are required to be improved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide the fluorocarbon coating with the low-temperature film forming effect and the preparation method thereof.

The fluorocarbon coating capable of forming a film at a low temperature comprises a main paint and a curing agent, wherein the weight ratio of the main paint to the curing agent is 120-150: 1; the main paint is prepared by mixing the following components in parts by weight: 35-45 parts of fluorocarbon resin, 1-4 parts of nano titanium dioxide, 2-8 parts of dioctyl phthalate, 12-28 parts of hydroxyl polyester, 2-5 parts of epoxy resin, 25-37 parts of montmorillonite, 1-3 parts of barium sulfate, 1-4 parts of fly ash, 48-56 parts of polycarbonate diol, 15-28 parts of n-butyl alcohol, 20-38 parts of hydroxymethyl cellulose, 1-3 parts of lubricant, 1-3 parts of bactericide and 1-3 parts of flatting agent; the curing agent comprises the following components in parts by weight: 1-5 parts of inorganic cementing material, 2-8 parts of butyl acetate and 20-30 parts of polyethylene methanol.

The improvement is that the weight ratio of the main paint to the curing agent is 120: 1.

the improved main paint is prepared by mixing the following components in parts by weight: 42 parts of fluorocarbon resin, 1 part of nano titanium dioxide, 6 parts of dioctyl phthalate, 20 parts of hydroxyl polyester, 3 parts of epoxy resin, 32 parts of montmorillonite, 2 parts of barium sulfate, 2 parts of fly ash, 50 parts of polycarbonate diol, 22 parts of n-butyl alcohol, 30 parts of hydroxymethyl cellulose, 2 parts of lubricant, 1 part of bactericide and 2 parts of flatting agent.

The improvement is that the curing agent comprises the following components in parts by weight: 2 parts of inorganic cementing material, 6 parts of butyl acetate and 6 parts of polyethylene methanol.

The preparation method of the fluorocarbon coating with the low-temperature film forming comprises the following steps:

step 1, mixing fluorocarbon resin, nano titanium dioxide, dioctyl phthalate, hydroxyl polyester, epoxy resin and montmorillonite, putting into a ball mill for grinding, adding hydroxymethyl cellulose, uniformly stirring, then sequentially adding barium sulfate, polycarbonate diol, fly ash, n-butyl alcohol, a lubricant, a bactericide and a leveling agent, and magnetically stirring to obtain a main paint;

step 2, dissolving butyl acetate in polyvinyl methanol, and adding an inorganic cementing material after ultrasonic stirring to obtain a curing agent;

and 3, mixing the main paint and the curing agent, and uniformly stirring to obtain the fluorocarbon coating.

Has the advantages that:

compared with the prior art, the low-temperature film-forming fluorocarbon coating disclosed by the invention is simple in components, bright in color, low in surface tension, strong in weather resistance and fast in normal-temperature curing, and solves the problem of high-temperature film forming.

Detailed Description

The present invention will be described in further detail below with reference to specific examples.