CN111635694A

CN111635694A - Water-based low-voltage heating coating

Info

Publication number: CN111635694A
Application number: CN202010561503.1A
Authority: CN
Inventors: 黄乾
Original assignee: Shanghai Wennuo Electrical Technology Co ltd
Current assignee: Shanghai Wennuo Electrical Technology Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2020-09-08

Abstract

The invention discloses a water-based low-voltage heating coating, which relates to the technical field of heating materials and comprises the following raw materials in percentage by mass: 5-9% of water, 10-14% of polyurethane resin, 8-12% of acrylic resin, 1-5% of polyester resin, 14-18% of polyethylene glycol, 0.5-3.5% of cellulose, 16-20% of graphene, 18-22% of chopped carbon fiber, 3-7% of carbon black, 0.5-3.5% of flake graphite, 0.5-3.5% of calcium carbonate and 1-5% of carbon nano tube. The water-based low-voltage heating coating provided by the invention is a novel heating coating with high adhesive force, high viscosity and apparent lubrication, has better low-temperature resistance, heat resistance and crack resistance than similar products, has excellent crack resistance, can well prevent the phenomenon of sparking, has stable performance, has lower resistance than similar products, can coat more areas with ultralow resistance, and has no sedimentation, no skinning phenomenon, stable performance and environmental protection.

Description

Water-based low-voltage heating coating

Technical Field

The invention relates to the technical field of heating materials, in particular to a water-based low-voltage heating coating.

Background

Currently, common indoor heating modes include air conditioners, electric floor heating, gas heating, oil heaters, heating furnaces, wall coil pipes and the like. The traditional heating devices have the defects of large power consumption, space occupation, high cost and low safety.

Therefore, a technical solution is urgently needed to solve the problem.

Disclosure of Invention

The invention provides a water-based low-voltage heating coating aiming at the defects of the prior art, which is a novel heating coating with high adhesive force, high viscosity and apparent lubrication, has better low-temperature resistance, heat resistance and crack resistance than similar products, has excellent crack resistance, can well prevent the phenomenon of sparking, has stable performance, lower resistance than similar products, can coat more areas with ultralow resistance, and has no sedimentation, no skinning phenomenon, stable performance and environmental protection.

In order to achieve the above object, the present invention provides the following technical solutions:

a water-based low-voltage heating coating comprises the following raw materials in percentage by mass: 5-9% of water, 10-14% of polyurethane resin, 8-12% of acrylic resin, 1-5% of polyester resin, 14-18% of polyethylene glycol, 0.5-3.5% of cellulose, 16-20% of graphene, 18-22% of chopped carbon fiber, 3-7% of carbon black, 0.5-3.5% of flake graphite, 0.5-3.5% of calcium carbonate and 1-5% of carbon nano tube.

Preferably, the raw materials and the mass percentage thereof are as follows: 7% of water, 12% of polyurethane resin, 10% of acrylic resin, 3% of polyester resin, 16% of polyethylene glycol, 2% of cellulose, 18% of graphene, 20% of chopped carbon fiber, 5% of carbon black, 2% of flake graphite, 2% of calcium carbonate and 3% of carbon nano tube.

Polyurethane resin polyurethane material is polyurethane for short, and the English name is polyurethane, which is a high molecular material. Polyurethane is a new organic polymer material, is known as 'fifth major plastic', and is widely applied to various fields of national economy due to excellent performance. The product application field relates to light industry, chemical industry, electronics, textile, medical treatment, building materials, automobiles, national defense, aerospace, aviation and the like, and the polymer material has the characteristics of high strength, tear resistance, wear resistance and the like.

Water: deionized water, so-called ionized water, is preferably selected in the coating, namely tap water is filtered by a water purifier by using active carbon as a filter layer to ensure that the tap water is purified to reach the standard (reaching the national water standard), and two kinds of active water, namely the ionized water, are generated by electrolyzing through a diaphragm.

The acrylic resin is a general term for polymers of acrylic acid, methacrylic acid and derivatives thereof. The acrylic resin coating is a thermoplastic or thermosetting resin coating prepared by using (methyl) acrylate and styrene as main components and acrylic resin obtained by copolymerizing the (methyl) acrylate and styrene with other acrylate, or an acrylic radiation coating. The acrylic resin copolymerized by acrylic ester and methacrylate monomers has excellent light resistance and outdoor aging performance, the main absorption peak of the acrylic resin to light is outside the solar spectrum range, so that the prepared acrylic resin paint thermoplastic acrylic resin is not further crosslinked in the film forming process, and has the advantages of large relative molecular weight, good light and color retention, water and chemical resistance, fast drying, convenient construction, easy construction recoating and reworking, and good whiteness and positioning of aluminum powder during the preparation of aluminum powder paint. Thermosetting acrylic resin is a resin with certain functional groups in the structure, and forms a net structure through the reaction with the functional groups in added amino resin, epoxy resin, polyurethane and the like during paint preparation, and the thermosetting resin is generally low in relative molecular weight.

Polyester resin: polyester resin is short for unsaturated polyester adhesive. The unsaturated polyester adhesive is mainly composed of unsaturated polyester resin, an initiator, an accelerator, a filler, a thixotropic agent and the like. A linear polyester resin with-CH = CH-double bond in main chain can be mixed with vinyl monomer, such as styrene, acrylate, vinyl acetate, etc. and then polymerized into insoluble and infusible product under normal temperature under the action of initiator and promoter. The english abbreviation of unsaturated polyester is UP. The method is mainly used for producing coil coating. The polyester resin coating is widely applied to medium-high grade coatings, low-pollution high-solid content and powder coatings. The unsaturated polyester paint has poor adhesion to metal, can be used as putty (filling mud) which is a decorative material for leveling wall surface, is a thick paste-like paint, is an indispensable product before painting, is coated on primer or directly coated on object for removing the defects of high and low unevenness on the surface of the coated object, is prepared by adopting a small amount of paint base, auxiliary agent, a large amount of filling material and a proper amount of coloring pigment, the used pigment mainly comprises iron red, carbon black, chrome yellow and the like, the filling material mainly comprises heavy calcium carbonate, talcum powder and the like, can fill a partially sunken working surface, can also be scraped off on the whole surface, is usually applied on the surface of the primer after the primer layer is dried, is required to have good adhesion and no crack is generated in the baking process), is easy to dry and smooth, and has good physical and mechanical properties, particularly, toughness, wear resistance and high temperature resistance, The impact resistance and scratch resistance are good.

Polyethylene glycol: the series products are non-toxic, non-irritant, slightly bitter in taste, good in water solubility and good in compatibility with a plurality of organic matter components. They have excellent lubricity, moisture retention, dispersibility, adhesives, antistatic agents, softeners and the like, and are widely applied in the industries of cosmetics, pharmacy, chemical fibers, rubber, plastics, papermaking, paint, electroplating, pesticides, metal processing, food processing and the like. The liquid has a molecular weight of 200-600, and gradually becomes semisolid when the molecular weight is above 600, and the properties of the liquid vary with the average molecular weight. Ranging from colorless odorless viscous liquids to waxy solids. As the molecular weight increases, its moisture absorption capacity decreases accordingly. The product is soluble in water, ethanol and many other organic solvents, has low vapor pressure, is stable to heat, acid and alkali, and does not act on many chemicals. Has good hygroscopicity, lubricity and cohesiveness, and is nontoxic and non-irritant.

Cellulose: is a macromolecular polysaccharide composed of glucose. Is insoluble in water and common organic solvents. At normal temperature, cellulose is insoluble in water and common organic solvents such as alcohol, ether, acetone, benzene, etc. It is also insoluble in dilute alkaline solutions. Therefore, at normal temperature, it is relatively stable because of hydrogen bonds between cellulose molecules. Cellulose is insoluble in organic solvents such as water, ethanol, and diethyl ether.

Graphene: the graphene is a two-dimensional carbon nanomaterial with hexagonal honeycomb lattices formed by sp hybridized orbits of carbon atoms, has excellent optical, electrical and mechanical properties, has important application prospects in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, and is considered to be a future revolutionary material;

short carbon fiber: is formed by chopping carbon fiber filaments by a fiber cutter, and the basic performance of the carbon fiber filaments mainly depends on the performance of the raw material, namely the carbon fiber filaments. The short fiber has the advantages of uniform dispersion, various feeding modes, simple process and the like, and can be applied to special fields which are not suitable for the carbon fiber filament.

Carbon black: also known as carbon black, is an amorphous carbon. The light, loose and extremely fine black powder has a very large surface area ranging from 10 to 3000m2/g, and is a product obtained by incomplete combustion or thermal decomposition of carbonaceous substances (coal, natural gas, heavy oil, fuel oil, etc.) under the condition of insufficient air. The specific gravity is 1.8-2.1. Gas black, which is made of natural gas, lamp black, which is made of oils, and acetylene black, which is made of acetylene. In addition, "channel black" and "furnace black" are also included. According to the properties of carbon black, there are "reinforcing carbon black", "conductive carbon black", "wear-resistant carbon black", etc. Can be used as black dye for manufacturing Chinese ink, printing ink, paint and the like, and also can be used as reinforcing agent of rubber.

Flake graphite: the graphite is natural crystalline graphite, is similar to fish phosphorus in shape, belongs to a hexagonal system, has a layered structure, and has good high temperature resistance, electric conduction, heat conduction, lubrication, plasticity, acid and alkali resistance and other properties. The flake graphite is a natural solid lubricant with a layered structure, is rich in resources and is low in price. The flake graphite is mainly used as a functional filler of the coating for anticorrosive coatings, fireproof coatings and conductive coatings. As an anticorrosive material, the antirust primer prepared from the anticorrosive primer, carbon black, talcum powder, oil and the like has good chemical resistance and solvent corrosion resistance; if chemical pigments such as zinc yellow and the like are added into the formula, the antirust effect is better.

Calcium carbonate: is an inorganic compound commonly known as limestone, stone powder, marble, etc. Calcium carbonate is neutral, substantially insoluble in water, and soluble in hydrochloric acid. It is one of the common substances on earth, exists in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also the main component of animal bones or shells. Calcium carbonate is also an important building material and has a wide range of industrial applications. Calcium carbonate is an important filler in the production of coatings. The calcium carbonate plays a role in filling and leveling the skeleton and the substrate (steel plate and wood) in the paint film, and the deposition and permeability of the paint film are enhanced. Especially used in metal antirust primer, it forms hydrogen bond with metal surface, increases paint film adhesion, and can absorb hydrogen ion to prevent metal from forming corrosion tendency of micro battery. In addition, the calcium carbonate has good weather resistance, abrasion resistance, low electrolyte content, pH value stabilizing effect, corrosion resistance, rheological property of the coating and the like. Coarse grade calcium carbonate is limited to putty, pore filling compounds, metallic primers, and other products that require high pigment levels, fluidity, and a coarse surface; calcium carbonate of medium size fraction is used in architectural coatings and indoor matt or semi-gloss paints; the fine fraction of calcium carbonate is mainly precipitated calcium carbonate and is used in printing inks.

Carbon nanotube: as a one-dimensional nano material, the material is light in weight, has perfect connection of a hexagonal structure, and has many abnormal mechanical, electrical and chemical properties. The carbon nano tube has good mechanical property, the tensile strength of the CNTs reaches 50-200 GPa, which is 100 times of that of steel, the density of the CNTs is only 1/6 of the steel, and the CNTs is at least one order of magnitude higher than that of the conventional graphite fiber; its elastic modulus can reach 1TPa, which is equivalent to that of diamond, about 5 times that of steel. The tensile strength of the single-walled carbon nanotubes with the desired structure is about 800 GPa. The structure of carbon nanotubes is similar to that of polymer materials, but is much more stable than polymer materials. Carbon nanotubes are the highest specific strength material that can be produced at present. If other engineering materials are used as a matrix and the carbon nano tube is prepared into the composite material, the composite material can show good strength, elasticity, fatigue resistance and isotropy, and the performance of the composite material is greatly improved.

A preparation method of a water-based low-voltage heating coating comprises the following steps:

heating and stirring, namely sequentially adding water, polyurethane resin, acrylic resin, polyester resin, polyethylene glycol and cellulose which are weighed according to the mass percentage into a reaction kettle, uniformly mixing and stirring, heating to 80 ℃, keeping the temperature and stirring for 1h, and standing to normal temperature;

dispersing and stirring, namely sequentially adding calcium carbonate, carbon black and flake graphite weighed according to the mass percentage into the reaction kettle in the step (1), stirring for 1/3 hours by a dispersion machine, and then introducing into a sand mill;

and (3) grinding and stirring, wherein after the sand mill in the step (2) circularly grinds for 4 times, the carbon nano tubes, the chopped carbon fibers and the graphene which are weighed according to the mass percentage are continuously added, and after stirring for 1 hour, the aqueous low-voltage heating coating is uniformly dispersed to obtain the aqueous low-voltage heating coating.

A construction process of a water-based low-voltage heating coating comprises the following steps:

1. calculating a construction wall surface drawing line;

2. pasting a temperature-resistant double-sided adhesive tape;

3. pasting an electric-grade copper bar on the double-faced adhesive;

4. coating water-based low-voltage heating paint;

5. and naturally drying, and converting the low voltage of 24V-36V by a transformer for mining.

Advantageous effects

The water-based low-voltage heating coating provided by the invention is a novel heating coating with high adhesive force, high viscosity and apparent lubrication, has better low-temperature resistance, heat resistance and crack resistance than similar products, has excellent crack resistance, can well prevent the phenomenon of sparking, has stable performance, has lower resistance than similar products, can coat more areas with ultralow resistance, and has no sedimentation, no skinning phenomenon, stable performance and environmental protection. The invention has good electrifying and heating effects, can be used uniformly in the construction of the anti-cracking coating on the wall surface for a long time without bubbling and falling off, and can provide large-area and high-power household heating and far infrared radiation health care and heating functions only by 7.5V-48V of safe voltage.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Example two

A water-based low-voltage heating coating comprises the following raw materials in percentage by mass: 7% of water, 12% of polyurethane resin, 10% of acrylic resin, 3% of polyester resin, 16% of polyethylene glycol, 2% of cellulose, 18% of graphene, 20% of chopped carbon fiber, 5% of carbon black, 2% of flake graphite, 2% of calcium carbonate and 3% of carbon nano tube.

The performance indexes of the water-based low-voltage heating coating are as follows:

1. raw materials: carbon nanotube, carbon fiber, water, etc

2. Solid content (WT%) 70-85%

3. Density (g/cm 3) 1.2-1.3

4. 8000-1000 viscosity (dpa. s20%) (VT-04E viscosity tester)

5. Coating area (cm 2/g) (depending on film thickness) 30-45

6. The square resistance is 0.8-1 omega (depending on the thickness of the coating film), 1 kilogram of material can be coated with 2.3 square powers, 500W.24V per square

7. Adhesion (3M 600 adhesive tape, vertical pull) without falling off

8. The hardness is more than or equal to 0.5-1H

9. Cold resistance 18 ℃ below zero and can be normally used (storability) after 8 times of unfreezing for 8 hours each time (the unfrozen products of the friend can not be used basically)

10. The temperature-resistant constant-temperature oven is stored for 12 days, taken out and can be normally used

11. After the water resistance is dried, the mixture is put into water to be soaked for 3 hours, taken out, and completely dried, the resistance change is less than 5 percent, and the resistance has no obvious change;

11. the continuous electrifying resistance and power of the electrifying performance for 6 months have no obvious change (less than 0.5 percent)

12. Packaging 1.kg. (one box 10 KG.) 5 KG. (one box 20 KG.) 15 kg.200 KG (or packaging as required)

13. Storing at room temperature, wherein the unopened storage period is more than 6 months; (high temperature, freezing, high humidity storage should be avoided).

The application method of the water-based low-voltage heating coating comprises the following steps:

1. coating a substrate: substrate, cement wall, copper sheet, white wall and the like

2. The spraying mode is as follows: a scraper, a roller and a spray gun;

3. diluent agent: purified water, distilled water and deionized water;

4. curing process (recommended): the power is stable after the surface is dried for 30 minutes and then electrified for 8 hours;

5. cleaning agent: water;

6. the substrate must be cleaned before painting, and adhesion and electrical performance are severely reduced when grease, oxides, dust, hand perspiration and other contaminants remain.

7. Before brushing, the coating must be fully and uniformly stirred;

8. in order to ensure that the performances of the slurry are basically consistent, the viscosity should be kept the same as much as possible during brushing; when the thinner is added, the paint is collected and mixed with part of new paint, and then a proper amount (less than 3 percent) of the special thinner is added and fully and uniformly stirred.

9, curing is thorough, otherwise, required characteristics cannot be obtained, and curing conditions are finely adjusted according to different requirements of equipment;

10. the construction process flow comprises the following steps: cleaning and repairing wall surface, calculating wall surface position, fixing electrode, painting resistance paint, drying and carrying out power-on test, which comprises the following steps: calculating a construction wall surface, drawing a line, pasting a temperature-resistant double-sided adhesive tape, pasting an electric-grade copper bar on the double-sided adhesive tape, coating a water-based low-voltage heating coating, naturally drying, and then converting a low voltage of 24V-36V through a transformer for heating.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A water-based low-voltage heating coating is characterized in that: the raw materials and the mass percentage thereof are as follows: 5-9% of water, 10-14% of polyurethane resin, 8-12% of acrylic resin, 1-5% of polyester resin, 14-18% of polyethylene glycol, 0.5-3.5% of cellulose, 16-20% of graphene, 18-22% of chopped carbon fiber, 3-7% of carbon black, 0.5-3.5% of flake graphite, 0.5-3.5% of calcium carbonate and 1-5% of carbon nano tube.

2. The aqueous low-voltage heating coating according to claim 1, wherein: the raw materials and the mass percentage thereof are as follows: 7% of water, 12% of polyurethane resin, 10% of acrylic resin, 3% of polyester resin, 16% of polyethylene glycol, 2% of cellulose, 18% of graphene, 20% of chopped carbon fiber, 5% of carbon black, 2% of flake graphite, 2% of calcium carbonate and 3% of carbon nano tube.

3. The preparation method of the water-based low-voltage heating coating according to claim 1, wherein the preparation method comprises the following steps: the method comprises the following steps:

(1) heating and stirring, sequentially adding water, polyurethane resin, acrylic resin, polyester resin, polyethylene glycol and cellulose which are weighed according to the mass percentage into a reaction kettle, uniformly mixing and stirring, heating to 80 ℃, keeping the temperature and stirring for 1h, and standing to normal temperature;

(2) dispersing and stirring, namely sequentially adding the calcium carbonate, the carbon black and the flake graphite which are weighed according to the mass percentage into the reaction kettle in the step (1), stirring for 1/3 hours by a dispersion machine, and then introducing into a sand mill;

(3) and (3) grinding and stirring, wherein the sand mill in the step (2) continuously adds the carbon nano tube, the chopped carbon fiber and the graphene which are weighed according to the mass percentage after circularly grinding for 4 times, and uniformly disperses to obtain the water-based low-voltage heating coating after stirring for 1 hour.