阅读说明：本技术 一种底盘装甲涂料及其制备方法 (Chassis armor coating and preparation method thereof ) 是由 淦克园 林志文 侯振宇 于 2019-01-31 设计创作，主要内容包括：本发明涉及车辆防护涂料领域,具体涉及一种底盘装甲涂料及其制备方法,该涂料包括：乳液、无机填料、硫化胶乳、增稠剂、松节油、凡士林、醇、氨基咪唑化合物、助剂和水；所述醇包括乙醇和/或异丙醇。本发明通过合理地选择底盘装甲涂料的组分材料,制得耐水性和附着力好的水性底盘装甲涂料。(The invention relates to the field of vehicle protective coatings, in particular to a chassis armor coating and a preparation method thereof, wherein the coating comprises the following components: emulsion, inorganic filler, vulcanized latex, thickener, turpentine, vaseline, alcohol, aminoimidazole compound, auxiliary agent and water; the alcohol comprises ethanol and/or isopropanol. The water-based chassis armor coating with good water resistance and adhesive force is prepared by reasonably selecting component materials of the chassis armor coating.)

1. A chassis armor coating, comprising: emulsion, inorganic filler, vulcanized latex, thickener, turpentine, vaseline, alcohol, aminoimidazole compound, auxiliary agent and water; the alcohol comprises ethanol and/or isopropanol.

2. The chassis armor coating of claim 1, comprising, in parts by weight, 20-38 parts of an emulsion, 20-35 parts of an inorganic filler, 8-25 parts of a vulcanized latex, 0.1-1 part of a thickener, 1-3 parts of turpentine, 1-3 parts of petrolatum, 2-4 parts of an alcohol, 1-2 parts of an aminoimidazole compound, 1-10 parts of an adjuvant, and 15-35 parts of water.

3. The undercarriage armor coating of claim 1 wherein said emulsion is at least one of a pure acrylic emulsion, a styrene-acrylic emulsion, a vinyl acetate emulsion, a silicone-fluorine emulsion, and a silicone-acrylic emulsion; the inorganic filler is at least one of talcum powder, kaolin, calcium carbonate, wollastonite powder, heavy calcium powder, lithopone, mica powder and hollow glass beads; the vulcanized latex is at least one of ethylene propylene vulcanized latex, butyl vulcanized latex and chloroprene vulcanized latex; the thickening agent comprises a cellulose thickening agent and a polyacrylate thickening agent, wherein the cellulose thickening agent is at least one of hydroxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl cellulose, and the acrylate thickening agent is an acrylate copolymer and/or hydrophobic modified alkali swelling acrylate.

4. The chassis armor coating of claim 1, wherein the additives include at least one of film-forming additives, anti-freeze agents, dispersants, wetting agents, corrosion inhibitors, anti-foam agents, PH adjusters, and thixotropic agents.

5. The chassis armor coating of claim 4, comprising, in parts by weight, 20-38 parts of an emulsion, 20-35 parts of an inorganic filler, 8-25 parts of a vulcanized latex, 0.1-1 part of a thickener, 1-3 parts of turpentine, 1-3 parts of petrolatum, 2-4 parts of an alcohol, 1-2 parts of an aminoimidazole compound, 1-5 parts of a film-forming aid, 0.5-2 parts of an antifreeze, 0.3-1 part of a dispersant, 0.05-0.2 part of a wetting agent, 0.1-0.3 part of a preservative, 0.1-0.5 part of an antifoaming agent, 0.02-0.1 part of a pH adjuster, 0.3-1 part of a thixotropic agent, and 15-35 parts of water.

6. The chassis armor coating of claim 4, wherein the coalescent is an alcohol ester of twelve and/or propylene glycol butyl ether; the antifreezing agent is low molecular weight alcohol and/or inorganic salt, and the low molecular weight alcohol comprises at least one of ethylene glycol, glycerol, propylene glycol and diethylene glycol; the dispersant is an anionic aqueous dispersant and/or a nonionic aqueous dispersant; the wetting agent is a nonionic surfactant; the preservative is an isothiazolinone preservative; the defoaming agent is at least one of a mineral oil defoaming agent, an organic silicon defoaming agent and a polyether defoaming agent; the pH regulator is sodium hydroxide and/or ammonia water; the thixotropic agent is a bentonite thixotropic agent.

7. The chassis armor coating of any one of claims 1-6, further comprising, in parts by weight, 0.2-1 part pigment; the pigment is pigment carbon black and/or carbon black color paste.

8. The chassis armor coating of any one of claims 1-6, further comprising 10-30 parts by weight of a flame retardant, wherein the flame retardant is an expanded graphite and/or a phosphorus-based flame retardant.

9. A method for preparing a chassis armor coating, characterized in that the components of the chassis armor coating of any one of claims 1-8 are mixed uniformly to obtain the chassis armor coating.

Technical Field

The invention relates to the field of vehicle protective coatings, in particular to a chassis armor coating and a preparation method thereof.

Background

The chassis armored coating can prevent flying stones and gravels from impacting a vehicle chassis, avoid the erosion of moisture, acid rain and salt on the metal of the vehicle chassis, prevent the chassis from rusting and protect the driving safety of a vehicle owner. In recent years, with the technical progress of water-based industrial coatings, the application of the water-based industrial coatings is rapidly developed, and people begin to adopt more environment-friendly and healthy water-based chassis armor coatings to replace oil-based chassis armor coatings. However, the performance of the water-based chassis armor coating on the market is inferior to that of the oil-based chassis armor coating, the drying speed is low, the film forming time is long, the water resistance and the adhesive force of a cured paint film are poor, and the problems of coating falling and cracking are easy to occur.

Disclosure of Invention

The invention mainly aims at the defects of the prior art and provides a chassis armor coating and a preparation method thereof.

In a first aspect of the invention, there is provided a chassis armor coating comprising: emulsion, inorganic filler, vulcanized latex, thickener, turpentine, vaseline, alcohol, aminoimidazole compound, auxiliary agent and water; the alcohol comprises ethanol and/or isopropanol.

The invention provides a preparation method of the chassis armor coating, which is characterized in that the components of the chassis armor coating are uniformly mixed to obtain the chassis armor coating.

In the invention, the inventor reasonably selects the component materials of the chassis armor coating to prepare the water-based chassis armor coating with good water resistance and adhesive force, and the performance of the water-based chassis armor coating can be comparable to or even superior to that of the existing oil chassis armor coating in the market.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

In a first aspect of the invention, there is provided a chassis armor coating comprising: emulsion, inorganic filler, vulcanized latex, thickener, turpentine, vaseline, alcohol, aminoimidazole compound, auxiliary agent and water; the alcohol comprises ethanol and/or isopropanol.

The inventor of the invention prepares the water-based chassis armor coating with good water resistance and adhesive force by reasonably selecting the component materials of the chassis armor coating.

The inventor of the invention carries out a great deal of experimental research, and continuously selects and adjusts the components and the content of the chassis armor coating, and finally finds that the coating comprises 20-38 parts of emulsion, 20-35 parts of inorganic filler, 8-25 parts of vulcanized latex, 0.1-1 part of thickener, 1-3 parts of turpentine, 1-3 parts of vaseline, 2-4 parts of alcohol, 1-2 parts of aminoimidazole compound, 1-10 parts of auxiliary agent and 15-35 parts of water by weight, so that the water resistance and the adhesive force of the chassis armor coating can be further improved.

According to the present invention, preferably, the emulsion is at least one of a pure acrylic emulsion, a styrene-acrylic emulsion, a vinyl acetate emulsion, a silicone fluorine emulsion, and a silicone acrylic emulsion, which may be commercially available. More preferably, the emulsion is a pure acrylic emulsion.

According to the present invention, preferably, the inorganic filler is at least one of talc powder, kaolin, calcium carbonate, wollastonite powder, coarse whiting powder, lithopone, mica powder and hollow glass beads; preferably, the filler is a mixture of talc, kaolin, and heavy calcium carbonate powder.

According to the present invention, preferably, the vulcanized latex is at least one of ethylene propylene vulcanized latex, butyl vulcanized latex and chloroprene vulcanized latex. The vulcanized latex in the chassis armor coating is a product obtained by vulcanizing rubber latex, the particle size of rubber particles in the vulcanized latex is micron-sized and is far smaller than fillers such as rubber powder, the vulcanized latex not only has high elasticity of rubber, but also still maintains the form of aqueous dispersion, is easy to mix and disperse with the latex, and can endow the chassis armor with higher elasticity and impact resistance. More preferably, the vulcanized latex is an ethylene propylene vulcanized latex. .

According to the invention, preferably, the thickening agent comprises a cellulose thickening agent and a polyacrylate thickening agent, the cellulose thickening agent is used as a nonionic thickening agent, and a certain molecular chain winding network can be formed through water absorption and expansion, so that defects such as sagging or uneven flow are not easy to occur when the coating is sprayed; the polyacrylate thickener can extend molecular chains through isotropic electrostatic repulsion, form a network structure with the filler and increase the viscosity of the system, and the chassis armor coating can have better viscosity by using lower content of the acrylate thickener, and simultaneously can improve the suspension performance of the filler in the emulsion. The invention adopts the matching use of the cellulose thickener and the polyacrylate thickener, can further improve the thickening effect and improve the storage stability of the chassis armor coating.

According to the present invention, preferably, the cellulose thickener is at least one of hydroxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl cellulose. The cellulose thickeners of the present invention are commercially available, such as: guangzhou Runzhong chemical Co., Ltd 250 HBR.

According to the present invention, preferably, the acrylate thickener is an acrylate copolymer and/or a hydrophobically modified alkali swellable acrylate. The acrylate thickeners of the present invention are commercially available, such as: ten thousand new materials, inc 701 in guangzhou city.

According to the present invention, preferably, the turpentine and the vaseline are both commercially available. The alcohol of the invention comprises volatile alcohol solvents such as ethanol and/or isopropanol and the like, and can be mutually soluble with water and oils (vaseline and turpentine). Therefore, the vaseline, the turpentine and the alcohol in the chassis armor coating can be mutually dissolved and blended, the three have good solubility, the alcohol and the water have good mutual solubility, the vaseline, the turpentine and the alcohol are added into the water-based emulsion, and the vaseline can be uniformly dispersed into the water-based chassis armor coating without being emulsified and modified; and the volatility of alcohol and turpentine is strong, the drying film-forming time of the water-based chassis armor can be shortened, after the alcohol and the turpentine volatilize, vaseline and water are insoluble and can be rapidly separated out to migrate to the surface to form a hydrophobic protective layer, and the water resistance and the stain resistance of the chassis armor are improved.

According to the present invention, preferably, the aminoimidazole compound is a water-soluble aminoimidazole compound and a derivative thereof, and more preferably, the aminoimidazole compound is at least one of 2-aminobenzimidazole, 1- (3-aminopropyl) imidazole and 4-aminobenzimidazole. According to the invention, the amino imidazole compound is added into the chassis armor coating, and an amino group contained in the amino imidazole compound can form an N-O-Me chemical bond with metal, so that the chassis armor coating has strong adhesive force and can obviously improve the adhesive force between the chassis armor coating and a substrate (metal).

According to the present invention, preferably, the auxiliary agent includes at least one of a film-forming agent, an antifreezing agent, a dispersing agent, a wetting agent, a preservative, an antifoaming agent, a PH adjuster, and a thixotropic agent.

According to the present invention, preferably, the coalescent is an alcohol ester of twelve and/or propylene glycol butyl ether. The process of emulsion film forming is that the water in the emulsion is evaporated, the emulsion particles are closely arranged to form a layer of elastic and compact resin film, and the film forming assistant can soften the particles and promote the flow and deformation of the particles, so that the particles are easy to coalesce into a film at a lower temperature. The coalescents of the present invention are commercially available, for example: twelve alcohol esters from eastman chemical company, usa.

According to the present invention, preferably, the antifreeze is a low molecular weight alcohol including at least one of ethylene glycol, glycerin, propylene glycol and diethylene glycol and/or an inorganic salt.

According to the invention, preferably, the dispersant is an anionic aqueous dispersant and/or a non-ionic aqueous dispersant; more preferably, the dispersant is at least one of a sodium polycarboxylate, sodium dodecylbenzenesulfonate and an ammonium acrylate polymer. The dispersants of the present invention are commercially available, such as: 731A by Hameros corporation, USA (5040 by Huixiang, Guangzhou).

According to the invention, preferably, the wetting agent is a nonionic surfactant, and the addition of the wetting agent can reduce the tension of the coating on the metal surface, so that the coating can be easily spread and soaked on the metal surface. More preferably, the wetting agent is at least one of octylphenol polyoxyethylene ether, an EO/PO block copolymer, and a modified acetylenic diol. The wetting agents of the present invention are commercially available, such as: x-405 from Dow chemical company (PE-100 from New Taxus Material).

According to the present invention, preferably, the preservative is an isothiazolinone preservative. The preservatives of the present invention are commercially available, such as: f-63, F-61, F-62 and F-64 of Federal Fine chemical Co., Ltd, in the Guangdong.

According to the present invention, preferably, the defoaming agent is at least one of a mineral oil-based defoaming agent, a silicone-based defoaming agent, and a polyether-based defoaming agent. The defoamers of the present invention are commercially available, for example: NXZ from Noppoco auxiliaries, Japan, and B-0401 from Federal Fine chemical Co., Ltd, Guangdong.

According to the invention, the pH regulator is preferably sodium hydroxide and/or ammonia. Therefore, the pH value of the coating can be adjusted to be alkalescent, and the coating is prevented from acidic corrosion on metal.

According to the present invention, preferably, the thixotropic agent is a bentonite-based thixotropic agent. The chassis armor coating contains the thixotropic agent, so that the viscosity of the chassis armor coating can be reduced in the processing process, the viscosity is recovered after the processing is finished, the using amount of a cellulose thickening agent can be reduced, and the moisture content in the chassis armor coating is further reduced. According to the invention, through the compound use of the thixotropic agent and the thickening agent, the viscosity of the chassis armor coating has a wide adjusting range, and the appearance and the spraying effect of the coating are improved. More preferably, the thixotropic agent is an organobentonite and/or a sodium bentonite. The thixotropic agents of the present invention are commercially available, such as: 30A of Changzhou Fengshou chemical company.

According to the invention, preferably, the coating comprises, by weight, 20-38 parts of an emulsion, 20-35 parts of an inorganic filler, 8-25 parts of vulcanized latex, 0.1-1 part of a thickener, 1-3 parts of turpentine, 1-3 parts of vaseline, 2-4 parts of alcohol, 1-2 parts of an aminoimidazole compound, 1-5 parts of a film forming aid, 0.5-2 parts of an antifreeze, 0.3-1 part of a dispersant, 0.05-0.2 part of a wetting agent, 0.1-0.3 part of a preservative, 0.1-0.5 part of a defoamer, 0.02-0.1 part of a pH regulator, 0.3-1 part of a thixotropic agent and 15-35 parts of water.

According to the invention, preferably, the coating further comprises 0.2 to 1 part by weight of a pigment; the pigment is pigment carbon black and/or carbon black color paste. The black pigment has strong dyeing ability and covering power and good stain resistance.

According to the invention, preferably, the coating further comprises 10-30 parts of a flame retardant by weight, wherein the flame retardant is expanded graphite and/or a phosphorus flame retardant. The flame retardant is added, so that the flame retardance of the chassis armor coating can be improved.

The invention provides a preparation method of the chassis armor coating, which is characterized in that the components of the chassis armor coating are uniformly mixed to obtain the chassis armor coating.

The method comprises the steps of preferably uniformly mixing all components of the chassis armor coating to obtain the chassis armor coating, weighing all components of the chassis armor coating according to a proportion, preparing ① cellulose solution, slowly adding a cellulose thickening agent into part of water, stirring at a rotation speed of 100-300 revolutions per minute, stirring for 3-5 minutes until the mixture is in a slightly clear state, adding a pH regulator, continuously stirring for 10-15 minutes, taking out, standing to obtain the cellulose solution with the required concentration, preparing ② vaseline mixed solution, melting vaseline into liquid at a temperature of 65-80 ℃, adding turpentine, stirring for 10-20 minutes, adding alcohol, stirring for 10-20 minutes to obtain mixed solution of vaseline, adding part of the cellulose solution, part of a film-forming auxiliary agent, part of an antifoaming agent, a dispersing agent, a wetting agent, a preservative, a thixotropic pigment, an antifreezing agent, an inorganic filler, an amino imidazole compound, a vulcanized latex solution and vaseline mixed solution into the rest water, stirring at a high speed of 10-30 minutes, adding a defoaming agent, stirring at a rotation speed of 2000-3000 minutes, stirring at a rotation speed of 1000-10 minutes, and stirring at a rotation speed of 1000-10 minutes to obtain an environment-30-90-10-minute acrylic acid defoaming agent.

The present invention is further illustrated by the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All the raw materials in the examples of the present invention are commercially available products unless otherwise specified.