CN109627945A - A kind of temperature sensing color changing varnish and preparation method thereof - Google Patents
A kind of temperature sensing color changing varnish and preparation method thereof Download PDFInfo
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- CN109627945A CN109627945A CN201811425332.9A CN201811425332A CN109627945A CN 109627945 A CN109627945 A CN 109627945A CN 201811425332 A CN201811425332 A CN 201811425332A CN 109627945 A CN109627945 A CN 109627945A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/26—Thermosensitive paints
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Abstract
The present invention specifically discloses a kind of temperature sensing color changing varnish and preparation method thereof, including 35~45 parts of mill base, and 45~55 parts of lotion, 5~15 parts and 28~35 parts of curing agent of water；The mill base includes: 15~35 parts of hydroxyl polyacrylic acid aqueous dispersion, and 65~70 parts of reversible temperature-sensitive camouflage paint, 0.5~1 part and 5~10 parts of deionized water of defoaming agent；The lotion includes: 25~38 parts of hydroxyl polyacrylic acid aqueous dispersion, 25~38 parts of hydroxy polyacrylate resin, 0.5~1 part of dimethylethanolamine, 6~10 parts of butyl glycol ether, 3~7 parts of dipropylene glycol methyl ether, 3~5 parts of UV light stabilizing agent, 3~5 parts of UV absorbers, 2~4 parts and 3~5 parts of deionized water of levelling agent；The curing agent includes: 65~75 parts of isocyanate curing agent；25~35 parts of hydrotropy.Coating provided by the present invention weatherability with higher, corrosion resistance, change colour sensitive, and the discoloration service life is long.
Description
Technical field
The present invention relates to technical field of coatings more particularly to a kind of temperature sensing color changing varnish and preparation method thereof.
Background technique
It is being improved always with further investigation, the performance of powdery paints with the wide application of coatings, not only it is filled
Decorations property effect requirements are higher and higher, and functional requirement is also more and more.Heat discoloration coating is as a kind of special-effect material
Material, can play the role of reminder alarm with temperature transition color, be widely used in fields such as anti-fake, cosmetics, toys.Than
If device temperature monitors, when temperature is higher than a certain limit temperature, it is unfavorable for safety operation or influences product quality, can remind open
Condensed water cooling, or adjustment heating temperature, to avoid danger.For automobile interior decoration field, heat discoloration coating is sprayed on aobvious
On the component of eye, driver can be reminded to open air-conditioning, for example summer when temperature is higher than 31 DEG C, changes colour, and prompting is opened cold
Gas, winter become another color when temperature is lower than 5 DEG C, and heating is opened in prompting.Color discoloration can be used as it is a kind of instruction or
Prompt is especially suitable for interior trim automobile component and uses.
Then, car paint is different from other coating, since automobile is chronically exposed in air, to car paint
Performance requirement is high, and car paint will not only accomplish to have that good mechanical performance, richness are good, gloss is high, also to accomplish attached
Put forth effort, hardness height, while more to have the performances such as fabulous weatherability and excellent resistance to gasoline, acidproof, alkaline-resisting, salt spray resistance.
But it is existing can in temperature induced color changing or photochromic coating, since effect of the off-color material to ambient impurities is quite sensitive,
When mixing with components other in coating, discoloration can not be showed sufficiently, for example, reaching coating when discoloring temperature
It cannot change colour in time, discoloration lag；Existing off-color material is the form of microcapsules, if component selection is improper, is added
The rupture of camouflage paint microcapsule shell is likely to result in after to coating, entering other chemical substances inside pigment loses it
Discoloration；And existing allochroic paint is not suitable for the demanding occasion of outdoor intensive ultraviolet weatherability, is exposed to family for a long time
The adverse circumstances of outer intensive ultraviolet can make coating lose discoloration quickly after a time.Therefore, a kind of synthesis is prepared
It has excellent performance and coating color varies with temperature sensitive, good reversibility, car paint with long service life has highly important
Meaning.
Summary of the invention
The problems such as being lagged for existing temperature sensing color changing coating color-changing, not being suitable for weatherability demanding occasion, the present invention
A kind of temperature sensing color changing varnish and preparation method thereof is provided.
To achieve the above object of the invention, the technical solution that this hair example provides is:
A kind of temperature sensing color changing varnish, including 35~45 parts of mill base, 45~55 parts of lotion, 5~15 parts of water and curing agent 28~
35 parts；
Wherein, the mill base includes the raw material components of following parts by weight: 15~35 parts of hydroxyl polyacrylic acid aqueous dispersion, can
Inverse 65~70 parts of heat discoloration pigment, 0.5~1 part and 5~10 parts of deionized water of defoaming agent；
The lotion includes the raw material components of following parts by weight: 25~38 parts of hydroxyl polyacrylic acid aqueous dispersion, and hydroxyl is poly-
25~38 parts of acrylate, 0.5~1 part of dimethylethanolamine, 6~10 parts of butyl glycol ether, dipropylene glycol methyl ether 3~7
Part, 3~5 parts of UV light stabilizing agent, 3~5 parts of UV absorbers, 2~4 parts and 3~5 parts of deionized water of levelling agent；
The curing agent includes the raw material components of following parts by weight: 65~75 parts of isocyanate curing agent；Hydrotropy 25~35
Part.
Compared with the existing technology, temperature sensing color changing coating provided by the invention has specific hydroxyl value and difference using two kinds
Film-forming resin of the hydroxyl polyacrylic acid dispersion and hydroxy polyacrylate resin blending of acid value as lotion, the two are mutually assisted
Together, the performances such as adhesive force, weatherability, hardness, the water-fast, acid and alkali-resistance of paint film are significantly improved；Meanwhile passing through hydroxyl polyacrylic acid
Two kinds of resin blendings of dispersion and hydroxyl Polypropionate resin can also make coating have high colour retention, extend reversible temperature indicating powder
Change colour the service life, improve discoloration sensitivity, so that the coating of preparation is suitable for the more demanding occasion of weatherability；Using hydroxyl poly- third
Main material of the olefin(e) acid aqueous dispersion as mill base, not only makes the compatibility of mill base and lotion good, but also face can be improved
The color developing of material, prevents pigment sedimentation, improves the storage stability of coating；UV light stabilizing agent is added and UV absorbers can
The weatherability for improving coating, extends the discoloration service life of coating；By in hydroxyl and isocyanate curing agent contained by two kinds of resins
- NCO crosslinking, be remarkably improved the compactness and weatherability of paint film.Comprehensive function between coating each component provided by the present invention,
The performances such as weatherability, the corrosion resistance of coating are significantly improved, and it is sensitive to change colour, the discoloration service life is long, is particularly suitable to be used as
The automobile interior decoration coating more demanding to coating.
Preferably, the solid content of the hydroxyl polyacrylic acid aqueous dispersion is 44~47%, and acid value is 9~11mgKOH/g,
Hydroxy radical content is 3.8~4.2%, and viscosity is 1500~3000mPas.
Preferably, the solid content of hydroxy polyacrylate resin is 48~51%, and acid value is 20~30mgKOH/g, hydroxyl
Content is 3.5~4.0%, and viscosity is 1000~3500mPas.
The hydroxy radical content of film-forming resin has larger impact to the performance of coating, with the increase of hydroxy radical content, film curing
Rear crosslink density increases, therefore the chemical resistance of paint film is more preferable, but when hydroxy radical content is excessively high, paint film can be caused water-fast instead
Property poor, glossiness decline, and hydroxy radical content is excessively high, and film-forming resin and generation inside coating during isocyanates can be made powerful
Shrinkage stress, cause camouflage paint microcapsule shell rupture, other chemical substances, which enter inside pigment, makes it lose discolouration
Energy.Therefore hydroxyl polyacrylic acid aqueous dispersion and hydroxyl polyacrylic acid that the present invention preferably hydroxy radical content is 3.5~4.0% or so
Ester resin not only can generate powerful convergent force as film-forming resin, two kinds of resin blendings to avoid inside when crosslinking curing, also
It can make camouflage paint dispersion degree with higher, improve the clarity and the transparency of film.
When acid value is lower, paint film water-tolerant, but when acid value is too low, hydroxyl polyacrylic acid dispersion or hydroxyl are poly-
After acrylate is mixed with isocyanate curing agent, hydroxyl polyacrylic acid dispersion or hydroxy polyacrylate resin are easy
It is precipitated from water, so that the paint film of preparation is lackluster；Water-fast, the alkali resistance that excessively high acid value will cause coating decline.
Therefore two kinds of different resin blendings of present invention selection acid value, can play the effect of mutual supplement with each other's advantages, significantly improve the viscous of paint film
The performances such as knotting strength and weatherability.
Preferably, the reversible temperature-sensitive camouflage paint is using tertiary amine as the anthraquinone analog compound of abutment.
More there is choosing, the reversible temperature-sensitive camouflage paint is existing for microencapsulated form.
Electronics transfer can occur at a certain temperature by the anthraquinone analog compound of abutment of tertiary amine, to make the organic matter
Molecular structure changes, and changes the refraction, reflection and irreflexive angle of light, realizes color transition, this electrochromic substance
It is not only bright-colored, but also the color change from coloured to colorless state may be implemented, discoloration color difference is obvious, this is that heavy metal is multiple
Not available for salt complex type and liquid crystal type reversible temperature-sensitive electrochromic substance.
Preferably, the defoaming agent is non-silicon class class defoaming agent.
Non-silicon class defoaming agent can not only play the role of defoaming and improve surface levelling, can also reduce high temperature or purple
The generation of outside line bring coating Yellowing, ensure that the color developing of coating.
Preferably, the UV light stabilizing agent is the hindered amine light stabilizer containing amino ether group.
Coating uses outdoors, the polymer meeting in the irradiation and atmosphere by sunlight middle-ultraviolet lamp in the effect coating of oxygen
Photooxidative degradation reaction occurs, influences the service life of coating.Hindered amine light stabilizer containing amino ether group, can eliminate or
It is anti-that the energy for delaying ultraviolet light and oxygen to be in excitation state to the direct attack of polymer or dissipation polymer will not cause chain type
It answers.
Preferably, the UV absorbers are hydroxyl pyrrolotriazine derivatives.
Hydroxyl pyrrolotriazine derivatives can form stable NO free radical, by constantly capturing harmful free radicals and regeneration,
Achieve the effect that prevent and treat polymer degradation, to improve the weatherability of coating, extends the service life of coating.By containing amino
The hindered amine light stabilizer and hydroxyl pyrrolotriazine derivatives UV absorbers of ether group cooperate with, and are remarkably improved the weather-proof of coating
Property.
Preferably, the levelling agent is esters of acrylic acid levelling agent.
Preferred levelling agent can reduce the surface tension of paint film, improve the mobility of solution, and the surface for promoting paint film is sliding
May just as well and substrate wettability, shrinkage cavity is prevented.
Preferably, the cosolvent is the mixture of propylene-glycol diacetate and propandiol butyl ether, wherein the propylene glycol
The mass ratio of diacetate esters and propandiol butyl ether is 1~3:1.
Propylene glycol diacetate and propandiol butyl ether have extremely strong dissolving power, and nontoxic low taste, having improves levelling, adjusts
The characteristics of paint film rate of drying.
The present invention still further provides the preparation of the temperature sensing color changing varnish under the premise of providing the temperature sensing color changing varnish
Method, the preparation method at least include the following steps:
Step a, prepares mill base: each component is weighed according to the design proportion of above-mentioned temperature sensing color changing varnish mill base, it will be weighed
Deionized water, hydroxyl polyacrylic acid aqueous dispersion, reversible warming camouflage paint and the defoaming agent of 70%~80%wt is stirred
Uniformly, fineness≤10 μm are ground to, are added remaining deionized water, the stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 60~
70KU obtains mill base；
Step b prepares lotion: each component is weighed according to the design proportion of lotion, by going for weighed 70%~80%wt
Ionized water, hydroxyl polyacrylic acid aqueous dispersion, hydroxy polyacrylate resin, dimethylethanolamine, butyl glycol ether, dipropyl two
Alcohol methyl ether, UV light stabilizing agent, UV absorbers and levelling agent, are uniformly mixed, and remaining deionized water is added, adjustment
The stormer viscosity of viscosity to 25 DEG C is calculated as 70~80KU, obtains lotion；
Step c, prepares curing agent: weighing each component according to the design proportion of curing agent, disperses weighed curing agent in
In cosolvent, curing agent is obtained；
Step d, in use, according to 35~45 parts of mill base, 45~55 parts of lotion, 5~15 parts and 28~35 parts of curing agent of water
Each component is weighed, weighed mill base and lotion are uniformly mixed, curing agent is then added and is uniformly mixed, weighed deionization is added
Water, the stormer viscosity of adjustment viscosity to 25 DEG C are calculated as 65~70KU and obtain temperature sensing color changing varnish.
Referring now to the prior art, the preparation method that the present invention improves is easy to operate, preparation is convenient, at low cost, is suitable for work
Industryization large-scale production.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
The embodiment of the present invention provides a kind of temperature sensing color changing varnish, including 35 parts of mill base, and 45 parts of lotion, 10 parts of water and curing agent
35 parts；
Wherein, the mill base includes the raw material components of following parts by weight: 35 parts of hydroxyl polyacrylic acid aqueous dispersion, reversible sense
65 parts of warm camouflage paint, 0.5 part and 8 parts of deionized water of defoaming agent；
The lotion includes the raw material components of following parts by weight: 25 parts of hydroxyl polyacrylic acid aqueous dispersion, hydroxyl polypropylene
38 parts of acid ester resin, 0.8 part of dimethylethanolamine, 8 parts of butyl glycol ether, 3 parts of dipropylene glycol methyl ether, 5 parts of UV light stabilizing agent,
4 parts of UV absorbers, 2 parts and 3 parts of deionized water of levelling agent；
The curing agent includes the raw material components of following parts by weight: 65 parts of isocyanate curing agent；26 parts of hydrotropy.
Above-mentioned hydroxyl polyacrylic acid aqueous dispersion is the Bayhydrol A 2470 of Bayer；Hydroxy polyacrylate resin is
The Bayhydrol A 2646 of Bayer；Reversible temperature-sensitive camouflage paint is that all WB03 and WB02 are pushed up in Guangzhou, and the mass ratio of the two is
1:1；Defoaming agent is the BYK-011 of Bi Ke；UV light stabilizing agent is 123 light stabilizer of BASF Tinuvin；Ultraviolet absorber
For BASF Tinuvin 400；Levelling agent is the PW-336 that France first creates；Isocyanate curing agent is Bayer waterborne curing agent3100；Cosolvent is propylene glycol diacetate and the mixture with propandiol butyl ether, wherein the propylene glycol
The mass ratio of diacetate esters and propandiol butyl ether is 1:1.
The preparation method of above-mentioned temperature sensing color changing varnish, comprising the following steps:
Step a, prepares mill base: each component is weighed according to the design proportion of above-mentioned temperature sensing color changing pigment printing paste, it will be weighed
Deionized water, hydroxyl polyacrylic acid aqueous dispersion, reversible warming camouflage paint and the defoaming agent of 70%wt is with the speed of 1500rpm
It is uniformly mixed, is ground to fineness≤10 μm, remaining deionized water is added, adjust the stormer viscosity meter of viscosity to 25 DEG C
For 60KU, mill base is obtained；
Step b, prepare lotion: according to lotion design proportion weigh each component, by the deionized water of weighed 70%wt,
Hydroxyl polyacrylic acid aqueous dispersion, hydroxy polyacrylate resin, dimethylethanolamine, butyl glycol ether, dipropylene glycol methyl ether,
UV light stabilizing agent, UV absorbers and levelling agent stir 25min with the speed of 1100rpm, remaining deionization are added
The stormer viscosity of water, adjustment viscosity to 25 DEG C is calculated as 80KU, obtains lotion；
Step c, prepares curing agent: weighing each component according to the design proportion of curing agent, the addition of weighed curing agent is helped
In solvent, to stir 25min with the speed of 1100rpm, curing agent is obtained；
Step d, in use, 45 parts of lotion, 10 parts and 35 parts of curing agent of water, weighing each component according to 35 parts of mill base, claiming
The mill base and lotion taken stirs 5min with the speed of 1100rpm, and curing agent is then added, and stirs 5min with the speed of 1100rpm,
Weighed deionized water is added, the stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 68KU, obtains temperature sensing color changing varnish.
Embodiment 2
The embodiment of the present invention provides a kind of temperature sensing color changing varnish, including 40 parts of mill base, and 55 parts of lotion, 5 parts of water and curing agent
30 parts；
Wherein, the mill base includes the raw material components of following parts by weight: 25 parts of hydroxyl polyacrylic acid aqueous dispersion, reversible sense
70 parts of warm camouflage paint, 0.8 part and 5 parts of deionized water of defoaming agent；
The lotion includes the raw material components of following parts by weight: 30 parts of hydroxyl polyacrylic acid aqueous dispersion, hydroxyl polypropylene
35 parts of acid ester resin, 0.5 part of dimethylethanolamine, 6 parts of butyl glycol ether, 5 parts of dipropylene glycol methyl ether, 4 parts of UV light stabilizing agent,
5 parts of UV absorbers, 3 parts and 4 parts of deionized water of levelling agent；
The curing agent includes the raw material components of following parts by weight: 70 parts of isocyanate curing agent；25 parts of hydrotropy.
Above-mentioned hydroxyl polyacrylic acid aqueous dispersion is the Bayhydrol A 2470 of Bayer；Hydroxy polyacrylate resin is
The Bayhydrol A 2646 of Bayer；Reversible temperature-sensitive camouflage paint is that all WB03, WB02 and 8310, the quality of three are pushed up in Guangzhou
Than for 1:1:1；Defoaming agent is the BYK-011 of Bi Ke；UV light stabilizing agent is 123 light stabilizer of BASF Tinuvin；It is ultraviolet
Absorbent is BASF Tinuvin 400；Levelling agent is the PW-336 that France first creates；Isocyanate curing agent is that Bayer is aqueous solid
Agent 3100；Cosolvent is propylene glycol diacetate and the mixture with propandiol butyl ether, wherein described third
The mass ratio of glycol diacetate and propandiol butyl ether is 3:1.
The preparation method of above-mentioned temperature sensing color changing varnish, comprising the following steps:
Step a, prepares mill base: each component is weighed according to the design proportion of above-mentioned temperature sensing color changing pigment printing paste, it will be weighed
Deionized water, hydroxyl polyacrylic acid aqueous dispersion, reversible warming camouflage paint and the defoaming agent of 75%wt is with the speed of 2000rpm
It is uniformly mixed, is ground to fineness≤10 μm, remaining deionized water is added, adjust the stormer viscosity meter of viscosity to 25 DEG C
For 70KU, mill base is obtained；
Step b, prepare lotion: according to lotion design proportion weigh each component, by the deionized water of weighed 75%wt,
Hydroxyl polyacrylic acid aqueous dispersion, hydroxy polyacrylate resin, dimethylethanolamine, butyl glycol ether, dipropylene glycol methyl ether,
UV light stabilizing agent, UV absorbers and levelling agent stir 25min with the speed of 1500rpm, remaining deionization are added
The stormer viscosity of water, adjustment viscosity to 25 DEG C is calculated as 70KU, obtains lotion；
Step c, prepares curing agent: weighing each component according to the design proportion of curing agent, the addition of weighed curing agent is helped
In solvent, to stir 25min with the speed of 1500rpm, curing agent is obtained；
Step d, in use, 55 parts of lotion, 5 parts and 30 parts of curing agent of water, weighing each component according to 40 parts of mill base, claiming
The mill base and lotion taken stirs 5min with the speed of 1100rpm, and curing agent is then added, and stirs 5min with the speed of 1300rpm,
Weighed deionized water is added, the stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 70KU, obtains temperature sensing color changing varnish.
Embodiment 3
The embodiment of the present invention provides a kind of temperature sensing color changing varnish, including 45 parts of mill base, and 50 parts of lotion, 15 parts of water and curing agent
28 parts；
Wherein, the mill base includes the raw material components of following parts by weight: 15 parts of hydroxyl polyacrylic acid aqueous dispersion, reversible sense
68 parts of warm camouflage paint, 1 part and 10 parts of deionized water of defoaming agent；
The lotion includes the raw material components of following parts by weight: 38 parts of hydroxyl polyacrylic acid aqueous dispersion, hydroxyl polypropylene
25 parts of acid ester resin, 1 part of dimethylethanolamine, 10 parts of butyl glycol ether, 7 parts of dipropylene glycol methyl ether, 3 parts of UV light stabilizing agent,
3 parts of UV absorbers, 4 parts and 5 parts of deionized water of levelling agent；
The curing agent includes the raw material components of following parts by weight: 75 parts of isocyanate curing agent；35 parts of hydrotropy.
Above-mentioned hydroxyl polyacrylic acid aqueous dispersion is the Bayhydrol A 2470 of Bayer；Hydroxy polyacrylate resin is
The Bayhydrol A 2646 of Bayer；Reversible temperature-sensitive camouflage paint is that all WB03 and 8310 are pushed up in Guangzhou, and the mass ratio of the two is
2:1；Defoaming agent is the BYK-011 of Bi Ke；UV light stabilizing agent is 123 light stabilizer of BASF Tinuvin；Ultraviolet absorber
For BASF Tinuvin 400；Levelling agent is the PW-336 that France first creates；Isocyanate curing agent is Bayer waterborne curing agent3100；Cosolvent is propylene glycol diacetate and the mixture with propandiol butyl ether, wherein the propylene glycol
The mass ratio of diacetate esters and propandiol butyl ether is 2:1.
The preparation method of above-mentioned temperature sensing color changing varnish, comprising the following steps:
Step a, prepares mill base: each component is weighed according to the design proportion of above-mentioned temperature sensing color changing pigment printing paste, it will be weighed
Deionized water, hydroxyl polyacrylic acid aqueous dispersion, reversible warming camouflage paint and the defoaming agent of 80%wt is with the speed of 1800rpm
It is uniformly mixed, is ground to fineness≤10 μm, remaining deionized water is added, adjust the stormer viscosity meter of viscosity to 25 DEG C
For 65KU, mill base is obtained；
Step b, prepare lotion: according to lotion design proportion weigh each component, by the deionized water of weighed 80%wt,
Hydroxyl polyacrylic acid aqueous dispersion, hydroxy polyacrylate resin, dimethylethanolamine, butyl glycol ether, dipropylene glycol methyl ether,
UV light stabilizing agent, UV absorbers and levelling agent stir 25min with the speed of 1300rpm, remaining deionization are added
The stormer viscosity of water, adjustment viscosity to 25 DEG C is calculated as 75KU, obtains lotion；
Step c, prepares curing agent: weighing each component according to the design proportion of curing agent, the addition of weighed curing agent is helped
In solvent, 25min is stirred with the speed of 1300rpm, obtains curing agent；
Step d, in use, 50 parts of lotion, 15 parts and 28 parts of curing agent of water, weighing each component according to 45 parts of mill base, claiming
The mill base and lotion taken stirs 5min with the speed of 1100rpm, and curing agent is then added, and stirs 5min with the speed of 1500rpm,
Weighed deionized water is added, the stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 65KU, obtains temperature sensing color changing varnish.
The characteristic for the temperature sensing color changing varnish that embodiment provides in order to better illustrate the present invention, below by Examples 1 to 3 system
Standby temperature sensing color changing varnish carries out performance detection, and test result is as shown in table 1.
1 the performance test results of table
Note: Coloring Time, which refers to, herein reaches the time that discoloring temperature discoloration is completed.
Temperature sensing color changing varnish provided by the invention as can be seen from Table 1 has fine weatherability, manually old by 1000h
Change experiment, paint film is not any change substantially, can still keep higher discoloration sensitivity, color can change after hot and cold alternation
10000 times or more, colour change function does not weaken, and hardness is higher, and acid and alkali-resistance, salt spray resistance are good, has not only reached automobile
The performance requirement of oil varnish, other opposite varnish have adhesive force good, and abrasion-resistant, color-variable, coloration is full, the weather-proof time
It is long, the advantages such as glossiness height.
The heat discoloration varnish of embodiment 1-3 preparation, deep red is visually at 21 DEG C of temperature or less, 21 DEG C~31 DEG C are
Transparent color, 31 DEG C the above are blues.Also according to the combination of different camouflage paints, a series of reversible temperature indicating for doing color change intervals, which becomes, to be applied
Material.
In conclusion the present invention provide temperature sensing color changing varnish, have hardness height, resistance to acid and alkali, water resistance, salt fog resistance and
The advantages of weatherability is had excellent performance, and it is lucuriant in design, discoloration color difference is obvious, changes colour sensitive, can meet the personalization of different clients
Demand has promotional value.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of temperature sensing color changing varnish, which is characterized in that including 35~45 parts of mill base, 45~55 parts of lotion, 5~15 parts of water and solid
28~35 parts of agent；
Wherein, the mill base includes the raw material components of following parts by weight: 15~35 parts of hydroxyl polyacrylic acid aqueous dispersion, reversible sense
65~70 parts of warm camouflage paint, 0.5~1 part and 5~10 parts of deionized water of defoaming agent；
The lotion includes the raw material components of following parts by weight: 25~38 parts of hydroxyl polyacrylic acid aqueous dispersion, hydroxyl polypropylene
It is 25~38 parts of acid ester resin, 0.5~1 part of dimethylethanolamine, 6~10 parts of butyl glycol ether, 3~7 parts of dipropylene glycol methyl ether, purple
3~5 parts of outer light stabilizer, 3~5 parts of UV absorbers, 2~4 parts and 3~5 parts of deionized water of levelling agent；
The curing agent includes the raw material components of following parts by weight: 65~75 parts of isocyanate curing agent；25~35 parts of cosolvent.
2. temperature sensing color changing varnish as described in claim 1, which is characterized in that the consolidating for hydroxyl polyacrylic acid aqueous dispersion contains
Amount is 44~47%, and acid value is 9~11mgKOH/g, and hydroxy radical content is 3.8~4.2%, and viscosity is 1500~3000mPas.
3. temperature sensing color changing varnish as described in claim 1, which is characterized in that the solid content of hydroxy polyacrylate resin is 48
~51%, acid value is 20~30mgKOH/g, and hydroxy radical content is 3.5~4.0%, and viscosity is 1000~3500mPas.
4. temperature sensing color changing varnish as described in claim 1, which is characterized in that the reversible temperature-sensitive camouflage paint is to be with tertiary amine
The anthraquinone analog compound of abutment.
5. temperature sensing color changing varnish as described in claim 1, which is characterized in that the defoaming agent is non-silicon class class defoaming agent.
6. temperature sensing color changing varnish as described in claim 1, which is characterized in that the UV light stabilizing agent is to contain amino ether
The hindered amine light stabilizer of group.
7. temperature sensing color changing varnish as described in claim 1, which is characterized in that the UV absorbers are hydroxyl triazine derivatives
Object.
8. temperature sensing color changing varnish as described in claim 1, which is characterized in that the levelling agent is esters of acrylic acid levelling agent.
9. temperature sensing color changing varnish as described in claim 1, which is characterized in that the cosolvent is propylene-glycol diacetate and third
The mixture of glycol butyl ether, wherein the mass ratio of the propylene-glycol diacetate and propandiol butyl ether is 1~3:1.
10. a kind of preparation method of temperature sensing color changing varnish, which is characterized in that at least include the following steps:
Step a, prepares mill base: weighing according to the design proportion of temperature sensing color changing varnish mill base as described in any one of claim 1~9
Each component, by the deionized water of weighed 70%~80%wt, hydroxyl polyacrylic acid aqueous dispersion, reversible warming camouflage paint and
Defoaming agent is uniformly mixed, and is ground to fineness≤10 μm, and remaining deionized water is added, and adjusts the Stormer of viscosity to 25 DEG C
Viscosity is calculated as 60~70KU, obtains mill base；
Step b prepares lotion: each component is weighed according to the design proportion of lotion, by the deionization of weighed 70%~80%wt
Water, hydroxyl polyacrylic acid aqueous dispersion, hydroxy polyacrylate resin, dimethylethanolamine, butyl glycol ether, dipropylene glycol first
Ether, UV light stabilizing agent, UV absorbers and levelling agent, are uniformly mixed, and remaining deionized water is added, and adjust viscosity
It is calculated as 70~80KU to 25 DEG C of stormer viscosities, obtains lotion；
Step c, prepares curing agent: each component is weighed according to the design proportion of curing agent, by weighed isocyanate curing agent point
It dissipates in cosolvent, obtains curing agent；
Step d, in use, 45~55 parts of lotion, 5~15 parts and 28~35 parts of curing agent of water weigh according to 35~45 parts of mill base
Weighed mill base and lotion are uniformly mixed by each component, and curing agent is then added and is uniformly mixed, weighed deionized water is added,
The stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 65~70KU and obtains temperature sensing color changing varnish.
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| CN115011227A (en) * | 2022-05-13 | 2022-09-06 | 联想(北京)有限公司 | Coating composition, method of making, method of coating, and articles coated therewith |
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