CN104212341B - Far infrared emission high-temperature-resistant kitchen and bath paint and preparation method thereof - Google Patents
Far infrared emission high-temperature-resistant kitchen and bath paint and preparation method thereof Download PDFInfo
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- CN104212341B CN104212341B CN201410476380.6A CN201410476380A CN104212341B CN 104212341 B CN104212341 B CN 104212341B CN 201410476380 A CN201410476380 A CN 201410476380A CN 104212341 B CN104212341 B CN 104212341B
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Abstract
The invention provides far infrared emission high-temperature-resistant kitchen and bath paint. The far infrared emission high-temperature-resistant kitchen and bath paint is characterized in that the raw materials comprise the following components: 15-30wt% of a component A, 20-30wt% of a component B, 0.5-1wt% of a flatting agent and the balance of a solvent, wherein the flatting agent and the solvent constitute a component C; the component A comprises methyl trialkoxy silane, tetraethyl orthosilicate and water; a molar ratio of the methyl trialkoxy silane to the tetraethyl orthosilicate is (1:1.5)-(1:0.25); the component B comprises reactive hydrophobic siloxane, silicon carbide nanoparticle and water, wherein the average particle size of the silicon carbide nanoparticle is 20-50nm. The coating has a heat-resistance temperature over 350 DEG C, can be used at a high temperature of 250 DEG C for a long time, has a static contact angle with the water of over 105 degrees, far infrared emissivity over 88% and good hydrophobic durability, is capable of satisfying common surface hydrophobic treatment requirements and capable of being applied to the fields such as kitchen and bath, buildings and industry.
Description
Technical field
The present invention relates to technical field of chemical products, specifically a kind of far infrared transmission thermostable transparent kitchen guarding's coating
And preparation method thereof.
Background technology
The anti-adhesion characteristic such as hydrophobic coating has that surface energy is low, coefficient of friction is little due to it, easy slip, hydrophobic performance are excellent and
Enjoy the concern of researcher；Coating surface is difficult the feature being adhered to or be readily removable after adhering by other stickums simultaneously,
It is widely used in the fields such as cooking apparatus coating, building surface coating, naval vessels nonpolluting coating.Necessarily heat-resisting, resistance to for needing
The hydrophobic coating of solvent nature, is used under 180 DEG C and temperatures above due to long-term, and is corroded by solvent etc. during use
Effect is it is therefore necessary to ensure that coating has the performance such as higher heat decomposition temperature and chemicals-resistant corrosion.
Hydrophobic coating is that a kind of surface energy of coating is less than 25mj/m2Or the special type of big 90 ° of the contact angle of coating and liquid
Coating, coating surface has extremely low surface energy, less coefficient of friction and liquid the features such as easily sliding in surface, thus table
Reveal coating surface to be difficult to be adhered to or be readily removable after adhering by other stickums, be widely used in small stores,
The field such as transportation building and national defense and military.As the self-cleaning surface coating of non-stick pan coating layer, building, aircraft wing not snearing
Layer, nonpolluting coating of steamer etc..Non-sticking lining mainly has low-surface-energy material such as silicone resin coating, organic fluorine at present
Coating, its film forming matter is siloxanes and fluorocarbon material, and material has extremely low surface energy, the contact angle of material surface and liquid
Greatly, roll angle is little, and dirt is not easy-adhesion on surface.Simultaneously low-surface-energy material using be material chemical characteristic, thus apply
Work is more convenient；Material with roughened surface does not glue energy what the microstructure of the non-adhering surfaces of mimic biology reached, studies at present
Only rest on the construction of laboratory small area, larger for large area, large-scale film and handling process difficulty.
Polysiloxane coating is obtained by film forming after the solidification of type siloxane monomer hydrolytic condensation, and coating curing temperatures are low, formed
Si-o key, bond energy is big, solidifies the sesquialter build si-o-si structure being cross-linked to form and has higher heat resisting temperature, good resistance to
Chemicals corrosive nature and good dimensional stability, are the good material preparing heat-resisting hydrophobic coating.But due to silica
Alkane pendant group content itself is few, and hydrophobic performance is limited, and adds hydrophobic silicone oil component in coating ingredients, and coating hydrophobicity has
Improved, but service life is short.
Organo-silicon compound have inorganic si-o-si component and an organic c-h component, therefore compound have in itself excellent
Inorganic-Organic Hybrid Material characteristic, in molecule, the bond distance of si-o covalent bond is 0.163nm, and bond energy is 425kj/mol, more than one
As c-c (0.144nm, 345kj/mol) and c-o (0.140nm, 351kj/mol) in Organic substance, and there is excellent resistance to height
The performances such as warm, weather-proof, resistance to chemical attack.Simultaneously because the pendant group being connected with main chain si atom is usually methyl, phenyl etc.
The larger group of spatial volume, has shielding action to main chain, makes compound have extremely low surface energy, functions thus as surface and lives
Property agent, reagent spreading agent etc., extensive in sector applications such as weaving, printing and dyeing, coating, electronics industry, agricultural productions.Due to side base base
Group has extremely low surface energy to the screen effect organosilicon reagent of main chain, is only second to fluorochemical, has reduction solvent body
System surface tension ability is strong, the alkaline remarkable advantage such as good of Heat-stable, Recent study is increasingly taken seriously, application
Also further expand simultaneously.In addition to the industries such as traditional textile dyeing and finishing, the even bubble of polyurethane, washing, organic silicon low-surface-energy reagent
Also it is used widely in buildings waterproof, the dispersion of coating levelling, the pottery occasion such as antifouling.And organic silicon low-surface-energy reagent at present
In, product variety is few, do not have the shortcomings of reaction active groups, product preparation process complexity, high cost it is therefore necessary to develop
More organic silicon surfactant new varieties, to expand its range of application.
In order to improve polysiloxane coating and the contact angle of water and the adhesion property with base material, at present, one is in coating
Add polydimethylsiloxane, to improve hydrophobic components shielding side base-ch in coating composition in component3Content, but due to poly- two
Methylsiloxane surface energy itself is low, lacks the chemical site being combined with coating composition and base material, is thus susceptible to reunion in bulk,
Coating surface is moved to by intramolecule, with coating hydrophobic performance under raising coating short time and low temperature, but coating stability
Especially heat-resistant stable poor performance, service life is short；In addition hydrolyze sol-gel method, by control with sol-gel method or progressively
Hydrolysis, condensation course are optimized to component structure, and preparation has the silica of the micro-nano structure of " imitative Folium Nelumbinis " self-cleaning surface
Alkane coating, strict due to controlling to component structure in preparation process, the structure of hydrophobic surface is fixed in the curing process, because
This hydrophobicity was improved with the hydrophobic life-span, but coating is poor with the adhesion property of base material, and heat stability is poor, coating work
The shortcomings of industryization preparation is difficult.Therefore in order to improve the hydrophobic life-span of the heat-resisting hydrophobic coating of polysiloxanes, the present invention adopts table energy
Low, have the β-heptamethyltrisiloxane base of similar polydimethylsiloxane silicone oil hydrophobic functional group and reactive functional-
Ethyl trimethoxy silane, as modified component, to improve the hydrophobic performance of coating ingredients, passes through reactive functionality and first simultaneously
Base trimethoxy silane hydrolytic condensation generates si-o-si three-dimensional crosslinked network system, prepares thermostability excellent with hydrophobic performance
Different polysiloxanes continue hydrophobic coating.Pass through β-heptamethyltrisiloxane base-ethyl trimethoxy silane to having one simultaneously
The carborundum of fixed far-infrared transmitting function carries out surface modification, it is to avoid carborundum undue agglomeration in coating preparation, leads to remote
Infrared emission performance reduces, and due to β-heptamethyltrisiloxane base-ethyl trimethoxy silane and oxyalkylsiloxane water
The si-o-si three-dimensional crosslinked network compact structure being formed after solution condensation, and there is the function of certain Far-infrared Absorption and transmitting,
The far infrared quilt siloxane structure of carborundum transmitting absorbs, then again toward emission far infrared, therefore with surface modification after carbonization
Silicon has the collaborative far-infrared transmitting function strengthening coating, improve its effect, it is to avoid carbofrax material is sent out in coating composition
The far infrared penetrated, by coating matrix absorbed, leads to the problem that far infrared transmissivity is low.Using progressively hydrolyzing copolycondensation
Method, is hydrolyzed to the siloxanes of differential responses activity, then carries out ultrasonic copolycondensation, it is to avoid siloxanes hydrolytic condensation process
The middle local excessive gel caking leading to because of the difference of reactivity, and the coating after the paint solidification causing is opaque.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, a kind of far infrared transmission thermostable transparent kitchen guarding is provided to apply
Material and preparation method thereof；Mainly solve nano silicon carbide powder and add in coating and be easy to reunite, and carbofrax material adds
Plus far infrared transmission performance too low the problems such as, solve the persistency of high temperature resistant hydrophobic coating and the unification of adhesive force simultaneously；
Especially so that hydrophobic active monomer can be reacted first carborundum is carried out with surface modification, formed to have and can react and hydrophobic far infrared is sent out
Penetrate multifunctional component, then coating preparation is carried out using progressively hydrolytic condensation, it is to avoid conventional method adopts physical blending to add, carbon
SiClx undue agglomeration, and matrix material to far-infrared absorption shield carborundum performance, and hydrophobic components be easy to migrate, hold
Long the problems such as hydrophobic performance difference；The fields such as kitchen guarding's coating, high-temperature baking coating that are applied to have broad application prospects.
In order to achieve the above object, the invention provides a kind of far infrared transmission thermostable transparent kitchen guarding's coating, its feature
It is, its raw material includes the solvent of a component 15～30wt%, b component 20～30wt%, levelling agent 0.5～1wt% and surplus,
Described levelling agent and solvent constitute c component；Described a component includes methyl trialkoxysilane, tetraethyl orthosilicate and water,
Described methyl trialkoxysilane is 1: 1.5～1: 0.25 with the mol ratio of tetraethyl orthosilicate, water and methyl tri-alkoxy
The mol ratio of silane is 1: 0.05～0.3；Described b component includes reacting hydrophobic silicone, nanometer silicon carbide granule and water,
The mean diameter of nanometer silicon carbide granule is 20～50nm, and the particle size range of granule is 10～60nm, can react hydrophobic silica
The mass ratio of alkane and nanometer silicon carbide granule is 1: 0.03～0.1, water and the mol ratio that can react hydrophobic silicone be 1: 0.1～
0.5.
Preferably, the particle diameter distribution d90-d10 ＜ 25nm of described nanometer silicon carbide granule.
Preferably, the mol ratio of described water and methyl trialkoxysilane is 1: 0.1.
Preferably, described methyl trialkoxysilane is in MTMS and MTES
At least one.
Preferably, described reacted to hydrophobic silicone is β-seven methyl-monosilane base ethyltrialkoxysilanes.
Preferably, described solvent is alcohol or the mixed solvent of alcohol and water, the wherein mass ratio 1: 0.5～1 of alcohol and water:
2.5.
It is highly preferred that described alcohol is at least one in ethanol and isopropanol.
Present invention also offers the preparation method of above-mentioned far infrared transmission thermostable transparent kitchen guarding's coating, its feature exists
In, comprising:
The first step: weigh each raw material in proportion, by the methyl trialkoxysilane in a component, tetraethyl orthosilicate and water
Mixing, adjusting ph value is 2.5～3.5, reacts 30～50min, obtain a performed polymer under room temperature；
Second step: reacted to the hydrophobic silicone in b component, nanometer silicon carbide granule and water are mixed, adjusting ph value is
2.5～3.5, react 45～60min under the conditions of 45～75 DEG C, obtain b performed polymer；
3rd step: a performed polymer and the mixing of b performed polymer carry out radiating copolycondensation under Ultrasonic Conditions, applied
Material precursor, adds the levelling agent in c component and solvent, filters, obtains far infrared transmission thermostable transparent kitchen guarding's coating.
Preferably, adjust ph value in the described first step and second step and use acid, described acid is hydrochloric acid, sulphuric acid and first
At least one in acid.
Preferably, the Ultrasonic Conditions in described 3rd step be ultrasound wave frequency be 53hz, relative power be 60～
80%, the time of radiation copolycondensation is 60～90min.
Present invention also offers the using method of above-mentioned far infrared transmission thermostable transparent kitchen guarding's coating, its feature exists
In, far infrared transmission thermostable transparent kitchen guarding's coating is sprayed, 180 DEG C solidify 20～45min.
The method that the present invention adopts ultrasonic polycondensation, can accelerate copolymeric siloxane process, simultaneously for the nanometer of surface modification
Carborundum, carries out while high efficiency dispersion and can carry out copolycondensation, make prepares coating sol particle less, coating surface is more
For densification, heat-resisting, hydrophobic and far infrared transmission performance is more preferable.
The present invention progressively hydrolyzed using monomer and carries out condensation course again, it is to avoid the speed of differential responses activated monomer reaction
Difference, and the local transition condensation leading to and form large scale gel, and affect the transparency of coating, simultaneously progressively hydrolytic process
In, surface modification can be carried out to nano-powder, there is reactivity point simultaneously and be fixed in coating ingredients, reach nano powder
Dispersed after the interpolation of body, improve its far infrared transmission performance.
Compared with prior art, the positive effect of the present invention is:
The present invention can be low and have similar polydimethylsiloxane silicone oil hydrophobic functional group and reactivity sense using table
β-heptamethyltrisiloxane base-the ethyl trimethoxy silane of group carries out surface modification to nano-sized SiC powder, reduces carbonization
Silicon face energy, improves the dispersibility of nano-powder, and carries out being grafted the functional group with reactivity and hydrophobic performance on surface,
So that function powder is grafted in the way of chemical reaction in the coating, improve dispersive property and stability, it is to avoid nanometer silicon carbide
Powder body adds in coating and is easy to reunite, and passes through reactive functionality simultaneously and generates si- with MTMS hydrolytic condensation
O-si three-dimensional crosslinked network system, prepares the thermostability polysiloxanes excellent with hydrophobic performance and continues hydrophobic coating；Preparation
It is excellent that coating continues hydrophobic performance, it is to avoid the migration of the low-surface-energy reagent adding in component in prior art, and reduce and dredge
In the water life-span, can reaction reagent have and main film forming substance MTMS acquaintance structure, the hydrolysing activity of alkoxyl
Height, high with base material adhesion, therefore avoid the problem of the poor adhesive force of hydrophobic coating in prior art.And siloxanes is similar
Si-o-si three-dimensional crosslinked network structure has Far-infrared Absorption and emission function, the far infrared tool to carbofrax material transmitting
Have transmission to act on, it is to avoid carbofrax material add far infrared transmission performance too low the problems such as, solve high temperature resistant hydrophobic simultaneously
The persistency of coating and the unification of adhesive force.Solving conventional method adopts physical blending to add, carborundum undue agglomeration, with
And matrix material shields carborundum performance to far-infrared absorption, and hydrophobic components are easy to migrate, and durable hydrophobic can differ from etc.
Problem, coating is applied to the fields such as kitchen guarding, household, automobile and has broad application prospects.
Progressively hydrolyze the method carrying out copolycondensation again in particular by siloxanyl monomers, using the fixing coating of chemical reaction
Component hydrophobic functional group and far-infrared transmitting function component, to improve durable hydrophobic energy and far infrared transmission after coating film forming
Function, after the coating of preparation solidifies 20～45min under the conditions of 180 DEG C, 105 ° of static contact angle ＞ with water, and coating itself
350 DEG C of heat resisting temperature ＞, far infrared transmissivity ＞ 88%, have the higher transparency；Coating has higher heat resisting temperature, and
There is far infrared transmission performance simultaneously, should have in kitchen guarding's coating, can quickly absorb far infrared, launch far infrared simultaneously
Line, and food is quickly toasted, improve the mouthfeel of food；Simultaneously in the application of kitchen guarding's coating, can quickly launch remote
Infrared ray, reduces the temperature of base material, the temperature of base material is played a protective role.
The particle diameter of nanometer silicon carbide granule is difficult too small, otherwise using β-seven methyl-monosilane base ethyltrialkoxysilanes
During hydrolysis surface finish nano carborundum, impact carbofrax material performance of reuniting because hydrolysis temperature is too high, cross low in hydrolysis simultaneously
Temperature and lead to β-seven methyl-monosilane base ethyltrialkoxysilanes hydrolysis be difficult to hydrolyze.
Using methyl trialkoxysilane and tetraethyl orthosilicate hydrolysis property polyfunctional group reaction system, beneficial to coating system
The cocondensation collecting process in standby process later stage.Alcohol-soluble solvent has a nontoxic characteristic, the coating of preparation and volatilize fast, and preparation cost is low
Feature.
Brief description
Fig. 1 is a kind of coating preparation flow process of present invention far infrared transmission thermostable transparent kitchen guarding's coating and preparation method thereof
Schematic diagram；
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content of present invention instruction, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiment 1
A kind of far infrared transmission thermostable transparent kitchen guarding's coating, its raw material is by a component 15wt%, b component 30wt%, levelling
The solvent composition of agent 0.5wt% and surplus, described levelling agent and solvent constitute c component；Described a component is by methyl trimethoxy oxygen
Base silane, tetraethyl orthosilicate and water composition, described MTMS is 1 with the mol ratio of tetraethyl orthosilicate:
1.5, the mol ratio of water and MTMS is 1: 0.05；Described b component is by β-seven methyl-monosilane base ethyl three alkane
TMOS, nanometer silicon carbide granule and water composition, the mean diameter of nanometer silicon carbide granule is 20nm, and particle size range is 10-
45nm, and d90-d10 is 20m, β-seven methyl-monosilane base ethyltrialkoxysilanes are 1 with the mass ratio of nanometer silicon carbide granule
: 0.03, water is 1: 0.1 with the mol ratio of β-seven methyl-monosilane base ethyltrialkoxysilanes.
As shown in figure 1, the preparation method of above-mentioned far infrared transmission thermostable transparent kitchen guarding's coating is:
The first step: weigh each raw material in proportion, by the MTMS in a component, tetraethyl orthosilicate and water
Mixing, adjusting ph value using the hydrochloric acid solution of 1.0mol/l is 2.5, reacts 30min, obtain a performed polymer under room temperature；
Second step: the β-seven methyl-monosilane base ethyltrialkoxysilanes in b component, nanometer silicon carbide granule and water are mixed
Close, adjusting ph value using the hydrochloric acid of 1.0mol/l is 2.5, reacts 60min, obtain b performed polymer under the conditions of 45 DEG C；
3rd step: a performed polymer and the mixing of b performed polymer carry out radiating copolycondensation under Ultrasonic Conditions, described
Ultrasonic Conditions are the frequency of ultrasound wave is 53hz, and relative power is 60%, and the time of radiation copolycondensation is 90min, obtains
To coating precursor, add the levelling agent heptamethyltrisiloxane in c component and solvent (mixed solvent of ethanol and water, and second
Alcohol and the mass ratio 1: 0.5 of water), filter, obtain far infrared transmission thermostable transparent kitchen guarding's coating.
During use, far infrared transmission thermostable transparent kitchen guarding's coating is sprayed on the aluminium alloy table through 120 mesh sand polishings
Face, solidifies 20min at 180 DEG C, through using static video contact angle instrument test, the static contact angle of the coating being formed and water
107 °, and the far infrared transmissivity 91.5% using far infrared transmissivity instrument testing coating.Using GB gb/t 6739-1996
Testing its pencil hardness is 7h, is 1 grade using gb/t 9286-1998 test its adhesive force of coating, in thermogravimetic analysis (TGA), with
Nitrogen protective gas, oxygen is purge gas, and control flow gas are 20ml/min, carry out thermogravimetic analysis (TGA) with 15 DEG C/min,
Its initial decomposition temperature temperature is 496 DEG C, decomposes temperature during 5% mass and is 535 DEG C, coating is coated on standard aluminium sheet,
After 350 DEG C of calcining 5h, surface color is constant, does not fall off.
Embodiment 2
A kind of far infrared transmission thermostable transparent kitchen guarding's coating, its raw material is by a component 30wt%, b component 30wt%, levelling
The solvent composition of agent 1wt% and surplus, described levelling agent and solvent constitute c component；Described a component is by methyl triethoxy
Silane, tetraethyl orthosilicate and water composition, described MTES is 1 with the mol ratio of tetraethyl orthosilicate:
0.25, the mol ratio of water and MTES is 1: 0.3；Described b component is by β-seven methyl-monosilane base ethyl three alkane
TMOS, nanometer silicon carbide granule and water composition, the mean diameter of nanometer silicon carbide granule is 50nm, and particle size range is 45-
60nm, and d90-d10 is 12nm, β-seven methyl-monosilane base ethyltrialkoxysilanes with the mass ratio of nanometer silicon carbide granule are
1: 0.1, water is 1: 0.5 with the mol ratio of β-seven methyl-monosilane base ethyltrialkoxysilanes.
As shown in figure 1, the preparation method of above-mentioned far infrared transmission thermostable transparent kitchen guarding's coating is:
The first step: weigh each raw material in proportion, by the MTES in a component, tetraethyl orthosilicate and water
Mixing, adjusting ph value using the sulfuric acid solution of 1mol/l is 3.5, reacts 50min, obtain a performed polymer under room temperature；
Second step: the β-seven methyl-monosilane base ethyltrialkoxysilanes in b component, nanometer silicon carbide granule and water are mixed
Close, adjusting ph value using the sulfuric acid solution of 1mol/l is 3.5, reacts 4min, obtain b performed polymer under the conditions of 75 DEG C；
3rd step: a performed polymer and the mixing of b performed polymer carry out radiating copolycondensation under Ultrasonic Conditions, described
Ultrasonic Conditions are the frequency of ultrasound wave is 53hz, and relative power is 60%, and the time of radiation copolycondensation is 90min, obtains
To coating precursor, add levelling agent heptamethyltrisiloxane in c component and solvent (mixed solvent of isopropanol and water, and
Alcohol and the mass ratio 1: 2.5 of water), filter, obtain far infrared transmission thermostable transparent kitchen guarding's coating.
During use, far infrared transmission thermostable transparent kitchen guarding's coating is sprayed on the aluminium alloy table through 120 mesh sand polishings
Face, solidifies 45min at 180 DEG C, through using static video contact angle instrument test, the static contact angle of the coating being formed and water
110 °, and adopt far infrared transmissivity instrument, the far infrared transmissivity of coating is 88.5%.Surveyed using GB gb/t 6739-1996
Trying its pencil hardness is 7h, is 1 grade using gb/t 9286-1998 test its adhesive force of coating, in thermogravimetic analysis (TGA), with nitrogen
Gas shielded gas, oxygen is purge gas, and control flow gas are 20ml/min, carry out thermogravimetic analysis (TGA) with 15 DEG C/min, its
Initial decomposition temperature temperature is 498 DEG C, decomposes temperature during 5% mass and is 540 DEG C, coating is coated on standard aluminium sheet, 350
DEG C calcining 5h after, surface color is constant, does not fall off.
Embodiment 3
A kind of far infrared transmission thermostable transparent kitchen guarding's coating, its raw material is by a component 20wt%, b component 25wt%, levelling
The solvent composition of agent 0.5wt% and surplus, described levelling agent and solvent constitute c component；Described a component is by methyl trimethoxy oxygen
Base silane, tetraethyl orthosilicate and water composition, described MTMS is 1 with the mol ratio of tetraethyl orthosilicate:
1, the mol ratio of water and MTMS is 1: 0.1；Described b component is by β-seven methyl-monosilane base ethyl trialkoxy
Silane, nanometer silicon carbide granule and water composition, the mean diameter of nanometer silicon carbide granule is 30nm, and particle size range is 15-45nm,
And d90-d10 is 20nm, β-seven methyl-monosilane base ethyltrialkoxysilanes are 1 with the mass ratio of nanometer silicon carbide granule:
0.05, water is 1: 0.2 with the mol ratio of β-seven methyl-monosilane base ethyltrialkoxysilanes.
As shown in figure 1, the preparation method of above-mentioned far infrared transmission thermostable transparent kitchen guarding's coating is:
The first step: weigh each raw material in proportion, by the MTMS in a component, tetraethyl orthosilicate and water
Mixing, adjusting ph value using the formic acid solution of 1mol/l is 2.5, reacts 50min, obtain a performed polymer under room temperature；
Second step: the β-seven methyl-monosilane base ethyltrialkoxysilanes in b component, nanometer silicon carbide granule and water are mixed
Close, adjusting ph value using the formic acid solution of 1mol/l is 2.5, reacts 60min, obtain b performed polymer under the conditions of 60 DEG C；
3rd step: a performed polymer and the mixing of b performed polymer carry out radiating copolycondensation under Ultrasonic Conditions, described
Ultrasonic Conditions are the frequency of ultrasound wave is 53hz, and relative power is 80%, and the time of radiation copolycondensation is 60min, obtains
To coating precursor, add levelling agent heptamethyltrisiloxane in c component and solvent (mixed solvent of isopropanol and water, and
Alcohol and the mass ratio 1: 1.5 of water), filter, obtain far infrared transmission thermostable transparent kitchen guarding's coating.
During use, far infrared transmission thermostable transparent kitchen guarding's coating is sprayed on the aluminium alloy table through 120 mesh sand polishings
Face, solidifies 25min, 108 ° of the static contact angle of the coating being formed and water, the far infrared transmissivity of coating at 180 DEG C
90.5%.Testing its pencil hardness using GB gb/t 6739-1996 is 7h, and using gb/t9286-1998 test coating, it is attached
Put forth effort as 1 grade, in thermogravimetic analysis (TGA), with nitrogen protective gas, oxygen is purge gas, and control flow gas are 20ml/
Min, carries out thermogravimetic analysis (TGA) with 15 DEG C/min, and its initial decomposition temperature temperature is 493 DEG C, decomposes temperature during 5% mass and is
530 DEG C, coating is coated on standard aluminium sheet, and after 350 DEG C of calcining 5h, surface color is constant, does not fall off.
Embodiment 4
A kind of far infrared transmission thermostable transparent kitchen guarding's coating, its raw material is by a component 30wt%, b component 20wt%, levelling
The solvent composition of agent 1wt% and surplus, described levelling agent and solvent constitute c component；Described a component is by methyl triethoxy
Silane, tetraethyl orthosilicate and water composition, described MTES is 1: 1 with the mol ratio of tetraethyl orthosilicate,
The mol ratio of water and MTES is 1: 0.1；Described b component is by β-seven methyl-monosilane base ethyl trialkoxy silicon
Alkane, nanometer silicon carbide granule and water composition, the mean diameter of nanometer silicon carbide granule is 20nm, and particle size range is 10-45nm, and
D90-d10 is 20nm, and β-seven methyl-monosilane base ethyltrialkoxysilanes are 1: 0.05 with the mass ratio of nanometer silicon carbide granule,
Water is 1: 0.2 with the mol ratio of β-seven methyl-monosilane base ethyltrialkoxysilanes.
As shown in figure 1, the preparation method of above-mentioned far infrared transmission thermostable transparent kitchen guarding's coating is:
The first step: weigh each raw material in proportion, by the MTES in a component, tetraethyl orthosilicate and water
Mixing, adjusting ph value using the formic acid solution of 1mol/l is 3.0, reacts 30min, obtain a performed polymer under room temperature；
Second step: the β-seven methyl-monosilane base ethyltrialkoxysilanes in b component, nanometer silicon carbide granule and water are mixed
Close, adjusting ph value using the formic acid solution of 1mol/l is 3.0, reacts 60min, obtain b performed polymer under the conditions of 45 DEG C；
3rd step: a performed polymer and the mixing of b performed polymer carry out radiating copolycondensation under Ultrasonic Conditions, described
Ultrasonic Conditions are the frequency of ultrasound wave is 53hz, and relative power is 80%, and the time of radiation copolycondensation is 60min, obtains
To coating precursor, add levelling agent heptamethyltrisiloxane in c component and solvent (mixed solvent of isopropanol and water, and
Alcohol and the mass ratio 1: 1 of water), filter, obtain far infrared transmission thermostable transparent kitchen guarding's coating.
During use, far infrared transmission thermostable transparent kitchen guarding's coating is sprayed on the aluminium alloy table through 120 mesh sand polishings
Face, solidifies 30min, 107 ° of the static contact angle of the coating being formed and water at 180 DEG C, and the far infrared transmissivity of coating is
92.0%.Testing its pencil hardness using GB gb/t 6739-1996 is 7h, and using gb/t9286-1998 test coating, it is attached
Put forth effort as 1 grade, in thermogravimetic analysis (TGA), with nitrogen protective gas, oxygen is purge gas, and control flow gas are 20ml/
Min, carries out thermogravimetic analysis (TGA) with 15 DEG C/min, and its initial decomposition temperature temperature is 498 DEG C, decomposes temperature during 5% mass and is
538 DEG C, coating is coated on standard aluminium sheet, and after 350 DEG C of calcining 5h, surface color is constant, does not fall off.
Embodiment 5
A kind of far infrared transmission thermostable transparent kitchen guarding's coating, its raw material is by a component 20wt%, b component 20wt%, levelling
The solvent composition of agent 0.5wt% and surplus, described levelling agent and solvent constitute c component；Described a component includes methyl trimethoxy
TMOS, tetraethyl orthosilicate and water, described MTMS is 1 with the mol ratio of tetraethyl orthosilicate:
0.5, the mol ratio of water and MTMS is 1: 0.3；Described b component includes β-seven methyl-monosilane base ethyl three alkane
TMOS, nanometer silicon carbide granule and water, the mean diameter of nanometer silicon carbide granule is 45nm, and particle size range is 20-50nm,
D90-d10 is 25nm, and β-seven methyl-monosilane base ethyltrialkoxysilanes are 1: 0.05 with the mass ratio of nanometer silicon carbide granule,
Water is 1: 0.2 with the mol ratio of β-seven methyl-monosilane base ethyltrialkoxysilanes.
As shown in figure 1, the preparation method of above-mentioned far infrared transmission thermostable transparent kitchen guarding's coating is:
The first step: weigh each raw material in proportion, by the MTMS in a component, tetraethyl orthosilicate and water
Mixing, adjusting ph value using the hydrochloric acid solution of 1mol/l is 2.5, reacts 50min, obtain a performed polymer under room temperature；
Second step: the β-seven methyl-monosilane base ethyltrialkoxysilanes in b component, nanometer silicon carbide granule and water are mixed
Close, adjusting ph value using the hydrochloric acid solution of 1mol/l is 2.5, reacts 45min, obtain b performed polymer under the conditions of 55 DEG C；
3rd step: a performed polymer and the mixing of b performed polymer carry out radiating copolycondensation under Ultrasonic Conditions, described
Ultrasonic Conditions are the frequency of ultrasound wave is 53hz, and relative power is 60%, and the time of radiation copolycondensation is 90min, obtains
To coating precursor, add the levelling agent heptamethyltrisiloxane in c component and solvent (mixed solvent of ethanol and water, and alcohol
Mass ratio 1: 1 with water), filter, obtain far infrared transmission thermostable transparent kitchen guarding's coating.
During use, far infrared transmission thermostable transparent kitchen guarding's coating is sprayed on the aluminium alloy table through 120 mesh sand polishings
Face, solidifies 30min at 180 DEG C, and the coating being formed is 107 ° with the static contact angle of water, the far infrared transmissivity of coating
90%.Testing its pencil hardness using GB gb/t 6739-1996 is 7h, using gb/t9286-1998 its attachment of test coating
Power is 1 grade, and in thermogravimetic analysis (TGA), with nitrogen protective gas, oxygen is purge gas, and control flow gas are 20ml/min,
Thermogravimetic analysis (TGA) is carried out with 15 DEG C/min, its initial decomposition temperature temperature is 495 DEG C, decomposing temperature during 5% mass is 535
DEG C, coating is coated on standard aluminium sheet, and after 350 DEG C of calcining 5h, surface color is constant, does not fall off.
Embodiment 6
A kind of far infrared transmission thermostable transparent kitchen guarding's coating, its raw material is by a component 30wt%, b component 30wt%, levelling
The solvent composition of agent 1wt% and surplus, described levelling agent and solvent constitute c component；Described a component is by methyl triethoxy
Silane, tetraethyl orthosilicate and water composition, described MTES is 1 with the mol ratio of tetraethyl orthosilicate:
1.0, the mol ratio of water and MTES is 1: 0.2；Described b component is by β-seven methyl-monosilane base ethyl three alcoxyl
Base silane, nanometer silicon carbide granule and water composition, the mean diameter of nanometer silicon carbide granule is 30nm, and particle size range is 15-
40nm, d90-d10 are 20nm, and β-seven methyl-monosilane base ethyltrialkoxysilanes are 1 with the mass ratio of nanometer silicon carbide granule:
0.05, water is 1: 0.2 with the mol ratio of β-seven methyl-monosilane base ethyltrialkoxysilanes.
As shown in figure 1, the preparation method of above-mentioned far infrared transmission thermostable transparent kitchen guarding's coating is:
The first step: weigh each raw material in proportion, by the MTES in a component, tetraethyl orthosilicate and water
Mixing, adjusting ph value using the formic acid solution of 1mol/l is 3.0, reacts 45min under room temperature,
Obtain a performed polymer；
Second step: the β-seven methyl-monosilane base ethyltrialkoxysilanes in b component, nanometer silicon carbide granule and water are mixed
Close, adjusting ph value using the formic acid solution of 1mol/l is 3.0, reacts 45min, obtain b performed polymer under the conditions of 60 DEG C；
3rd step: a performed polymer and the mixing of b performed polymer carry out radiating copolycondensation under Ultrasonic Conditions, described
Ultrasonic Conditions are the frequency of ultrasound wave is 53hz, and relative power is 75%, and the time of radiation copolycondensation is 90min, obtains
To coating precursor, add levelling agent heptamethyltrisiloxane in c component and solvent (mixed solvent of isopropanol and water, and
Alcohol and the mass ratio 1: 2.0 of water), filter, obtain far infrared transmission thermostable transparent kitchen guarding's coating.
During use, far infrared transmission thermostable transparent kitchen guarding's coating is sprayed on the aluminium alloy table through 120 mesh sand polishings
Face, solidifies 45min, 112 ° of the static contact angle of the coating being formed and water, the far infrared transmissivity 91% of coating at 180 DEG C.
Testing its pencil hardness using GB gb/t 6739-1996 is 7h, is 1 using gb/t9286-1998 test its adhesive force of coating
Level, in thermogravimetic analysis (TGA), with nitrogen protective gas, oxygen is purge gas, and control flow gas are 20ml/min, with 15
DEG C/min carries out thermogravimetic analysis (TGA), its initial decomposition temperature temperature is 498 DEG C, decomposes temperature during 5% mass and is 540 DEG C, applies
Layer is coated on standard aluminium sheet, and after 350 DEG C of calcining 5h, surface color is constant, does not fall off.
Claims (8)
1. a kind of preparation method of far infrared transmission thermostable transparent kitchen guarding's coating, described far infrared transmission thermostable transparent kitchen
The raw material defending coating includes the solvent of a component 15～30wt%, b component 20～30wt%, levelling agent 0.5～1wt% and surplus, institute
The levelling agent stated and solvent constitute c component；Described a component includes methyl trialkoxysilane, tetraethyl orthosilicate and water, institute
The methyl trialkoxysilane stated is 1:1.5～1:0.25, water and methyl tri-alkoxy silicon with the mol ratio of tetraethyl orthosilicate
The mol ratio of alkane is 1:0.05～0.3；Described b component includes reacting hydrophobic silicone, nanometer silicon carbide granule and water, carbon
The mean diameter of SiClx nano-particle is 20～50nm, and the particle size range of granule is 10～60nm, can react hydrophobic silicone
Be 1:0.03～0.1 with the mass ratio of nanometer silicon carbide granule, water and can react hydrophobic silicone mol ratio be 1:0.1～
0.5 it is characterised in that include:
The first step: weigh each raw material in proportion, the methyl trialkoxysilane in a component, tetraethyl orthosilicate and water are mixed,
Adjusting ph value is 2.5～3.5, reacts 30～50min, obtain a performed polymer under room temperature；
Second step: reacted to the hydrophobic silicone in b component, nanometer silicon carbide granule and water are mixed, adjust ph value for 2.5～
3.5, react 45～60min under the conditions of 45～75 DEG C, obtain b performed polymer；Described reacted to hydrophobic silicone is β-seven first
Base trisiloxanes base-ethylidene trimethoxy silane；
3rd step: a performed polymer and the mixing of b performed polymer carry out radiating copolycondensation, before obtaining coating under Ultrasonic Conditions
Drive body, add the levelling agent in c component and solvent, filter, obtain far infrared transmission thermostable transparent kitchen guarding's coating.
2. the preparation method of far infrared transmission thermostable transparent kitchen guarding's coating as claimed in claim 1 is it is characterised in that described
Nanometer silicon carbide granule particle diameter distribution d90-d10 ＜ 25nm.
3. the preparation method of far infrared transmission thermostable transparent kitchen guarding's coating as claimed in claim 1 is it is characterised in that described
Methyl trialkoxysilane be MTMS and MTES at least one.
4. the preparation method of far infrared transmission thermostable transparent kitchen guarding's coating as claimed in claim 1 is it is characterised in that described
Solvent be alcohol or alcohol and water mixed solvent, the wherein mass ratio 1:0.5～1:2.5 of alcohol and water.
5. the preparation method of far infrared transmission thermostable transparent kitchen guarding's coating as claimed in claim 4 is it is characterised in that described
Alcohol be ethanol and isopropanol at least one.
6. the preparation method of far infrared transmission thermostable transparent kitchen guarding's coating as claimed in claim 1 is it is characterised in that described
Adjust ph value in the first step and second step and use acid, described acid is at least one in hydrochloric acid, sulphuric acid and formic acid.
7. the preparation method of far infrared transmission thermostable transparent kitchen guarding's coating as claimed in claim 1 is it is characterised in that described
Ultrasonic Conditions in 3rd step be ultrasound wave frequency be 53hz, relative power be 60～80%, radiation copolycondensation when
Between be 60～90min.
8. prepared by the preparation method of far infrared transmission thermostable transparent kitchen guarding's coating any one of claim 1-7
The construction method of far infrared transmission thermostable transparent kitchen guarding's coating is it is characterised in that by far infrared transmission thermostable transparent kitchen guarding
Coating is sprayed, and solidifies 20～45min at 180 DEG C.
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| CN112645712A (en) * | 2020-12-24 | 2021-04-13 | 西安鑫垚陶瓷复合材料有限公司 | Hydrophobic ceramic powder, carbon-ceramic composite material surface protective coating and preparation method thereof |
| CN115820112B (en) * | 2022-12-01 | 2023-09-19 | 广东美的白色家电技术创新中心有限公司 | Coating composition and preparation method and application thereof |
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| CN101429355A (en) * | 2007-11-08 | 2009-05-13 | 深圳大学 | Process for preparing nano-organosilicon composite coating |
| CN101987941A (en) * | 2009-08-03 | 2011-03-23 | 深圳大学 | Method for preparing nanometer hardened organic silicon coating |
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