CN110183954A - A kind of preparation method of light-resistant waterborne polyurethane coating - Google Patents
A kind of preparation method of light-resistant waterborne polyurethane coating Download PDFInfo
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- CN110183954A CN110183954A CN201910455993.4A CN201910455993A CN110183954A CN 110183954 A CN110183954 A CN 110183954A CN 201910455993 A CN201910455993 A CN 201910455993A CN 110183954 A CN110183954 A CN 110183954A
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
The invention discloses a kind of preparation methods of light-resistant waterborne polyurethane coating, the present invention specifically includes the following steps: S1, ingredient component weighing, the reaction of S2, paint binder are prepared, the preparation of S3, aqueous polyurethane aqueous emulsion, the allotment of S4, fast light modifying agent, the preparation of S5, light-resistant waterborne polyurethane coating, the present invention relates to technical field of coatings.The preparation method of the light-resistant waterborne polyurethane coating, it may be implemented in polyurethane coating and light resistance improvement component be added, first the whole light resistance of polyurethane material is promoted, then pass through UV absorbers and nano titanium dioxide photocatalyst again, ultraviolet light is set to be rapidly absorbed catalysis reaction, achieve the purpose that more to promote the light resistance of polyurethane coating well, greatly improve the sunproof light resistance effect of polyurethane coating, realizing keeps polyurethane coating more extensive using meeting, ensures that polyurethane coating can be used for a long time.
Description
Technical field
The present invention relates to technical field of coatings, specially a kind of preparation method of light-resistant waterborne polyurethane coating.
Background technique
Polyurethane material due to having high intensity, tear-proof, the characteristics such as wear-resisting and elasticity is good, with lotion, set
The forms such as rouge, elastomer are widely used in transport, household electrical appliances, machinery, building, light textile, shoemaking, sports goods and place, agricultural, state
Anti- equal fields, are a kind of multi-functional polymer materials, polyurethane is divided into aromatic series according to the type difference of isocyanate material
Polyurethane and aliphatic polyurethane, aliphatic polyurethane properties of product are relatively stable, and the performances such as intensity, durability are all preferable,
But price is relatively high, and the performance of aromatic urethane product and the performance of aliphatic polyurethane product match in excellence or beauty, and price
Cheap, unique defect is that its portioned product performance is unstable, especially white or light coloured fabrics under the action of ultraviolet light,
Ammonia ester bond in structure easily decomposes, aoxidizes generation quinones chromophoric group, and the methylene being connected with phenyl ring, which is easily oxidized, to be brought it about
Xanthochromia, the aromatic series isocyanic acid such as methyl diphenylene diisocyanate (MDI) for all using cost performance high due to most of PU resins
Ester is as raw material, and since phenyl ring is directly connect with isocyanate groups in MDI, big pi bond on phenyl ring and neighbouring-NCO shape
At conjugation, so, using MDI as PU resin made of raw material, under light, heat, oxygen environment, especially polyurethane is absorbing 290-
After 400nm ultraviolet light, it is easy to cause polyurethane chain fracture, crosslinking, degradation generates chromophoric group, causes the mechanics of polyurethane product
Performance and anti-yellowing property decline.
It is at present that light inhibitor is directly added in polyurethane coating mostly, to inhibit polyurethane chain in polyurethane material
Fracture, crosslinking and degradation, so that the light resistance of polyurethane coating is improved, however, such method raising polyurethane coating is fast light
The effect of property is limited, can only be improved to some extent for conventional polyurethanes coating, and for some pairs of polyurethane
It is not suitable under the more demanding environment of coating light resistance, such as automobile case surface and external wall etc. are exposed to ambient light for a long time
Light resistance improvement component is added in polyurethane coating according to can not achieve in environment, first to the whole light resistance of polyurethane material
It is promoted, then so that ultraviolet light is rapidly absorbed catalysis by UV absorbers and nano titanium dioxide photocatalyst again
Reaction, is unable to reach the purpose more promoted to the light resistance of polyurethane coating, not can solve polyurethane
Coating uses the problem of limitation, and cannot achieve keeps polyurethane coating more extensive using meeting, to use polyurethane to people
Coating brings great inconvenience.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of preparation method of light-resistant waterborne polyurethane coating, solutions
It has determined existing sunproof polyurethane coating smaller scope of application, can not achieve the addition light resistance improvement group in polyurethane coating
Part, first the whole light resistance of polyurethane material is promoted, then passes through UV absorbers and nano-titanium dioxide light again
Catalyst makes ultraviolet light be rapidly absorbed catalysis reaction, is unable to reach and is more mentioned to the light resistance of polyurethane coating
The purpose risen not can solve the problem of polyurethane coating is using limitation, and cannot achieve makes polyurethane coating use meeting
More extensive problem.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of light-resistant waterborne polyurethane painting
The preparation method of material, specifically includes the following steps:
The weighing of S1, ingredient component: the polyether Glycols of corresponding weight ratio part, two are measured respectively using weighing equipment first
It is hydroxymethyl propionic acid, 22,42 diisocyanate of toluene, triethylamine, acetone, 222 pyrrolidones of N2 methyl, fast light modifying agent, ultraviolet
Light absorber and nano titanium dioxide photocatalyst, and each component for measuring completion is poured into reagent pot respectively and is saved；
The reaction of S2, paint binder are prepared: the polyether Glycols measured in step S1 are depressurized under 100-120 DEG C of vacuum
Be dehydrated 0.8-1.2h, dewatered polyether Glycols and 22,42 diisocyanate of toluene 25-40 DEG C at a temperature of be separately added into
In electric mixer equipped with thermometer, the nano titanium dioxide photocatalyst of corresponding weight ratio part is then added, is warming up to 75-
80 DEG C, isothermal reaction 1.5-2h；
The preparation of S3, aqueous polyurethane aqueous emulsion: the reaction solution after step S2 reaction is poured into four-hole boiling flask, is cooled to
45-50 DEG C, the dihydromethyl propionic acid dissolved with 222 pyrrolidones of N2 methyl is then added, is warming up to 70-75 DEG C, reacts 1-3h
After be cooled to 30-35 DEG C, add triethylamine neutralization reaction 5-10min, the acetone of corresponding weight ratio part be added in reaction process
Viscosity reduction is carried out, under fierce stirring, the deionized water measured needed for being added continues to stir 10-20min, finally be evaporated under reduced pressure
Aqueous polyurethane aqueous emulsion can be obtained in acetone out；
The allotment of S4, fast light modifying agent: the polyacrylate of selection and oxireme resin are compared into part according to corresponding measurement
The deionized water for being added in electric mixer and measuring needed for being added is that 400-500r/min stirs 30-40min with revolving speed,
The allotment of fast light modifying agent can be completed；
The preparation of S5, light-resistant waterborne polyurethane coating: step S3 system is added in the UV absorbers that step S1 is measured
In the polyaminoester emulsion obtained, 1-2h is stirred with the revolving speed of 600-700r/min using electric stirring mechanism, makes UV absorbers
It is sufficiently mixed in polyaminoester emulsion, the fast light modifying agent for then deploying step S4 is added in mixed emulsion, with revolving speed
2-3h is stirred for the revolving speed of 800-1000r/min, 15-30min is then allowed to stand, light-resistant waterborne polyurethane coating can be obtained.
Preferably, each component of aqueous polyurethane coating by weight part includes: polyether Glycols 20- in the step S1
30 parts, 10-20 parts of dihydromethyl propionic acid, 10-20 parts of 22,42 diisocyanate of toluene, 5-10 parts of triethylamine, 1-5 parts of acetone, N2
10-20 parts of 222 pyrrolidones of methyl, modifying agent 10-20 parts fast light, 10-20 parts of UV absorbers, nano-titanium dioxide light are urged
1-5 parts of agent and deionized water surplus.
Preferably, fast light modifying agent is by 80% polyacrylate and 20% oxireme resin in the step S4
Composition.
Preferably, UV absorbers are septichen phenyl ester, benzotriazole or hexamethyl in the step S5
One of phosphoric triamide or a variety of combinations.
Preferably, reaction end is judged using n-Butylamine titration method in the step S2.
Preferably, the four-hole boiling flask in the step S3 is the condenser with CaCl2 drying tube.
(3) beneficial effect
The present invention provides a kind of preparation methods of light-resistant waterborne polyurethane coating.Have compared with prior art following
The utility model has the advantages that the preparation method of the light-resistant waterborne polyurethane coating, specifically includes the following steps: the weighing of S1, ingredient component:
Measure the polyether Glycols, dihydromethyl propionic acid, 22,42 2 isocyanide of toluene of corresponding weight ratio part respectively using weighing equipment first
Acid esters, triethylamine, acetone, 222 pyrrolidones of N2 methyl, fast light modifying agent, UV absorbers and nano-titanium dioxide light are urged
Agent, and each component for measuring completion is poured into reagent pot respectively and is saved, the reaction of S2, paint binder are prepared: by step S1
The polyether Glycols of middle measurement decompression dehydration 0.8-1.2h under 100-120 DEG C of vacuum, the system of S3, aqueous polyurethane aqueous emulsion
It is standby: the reaction solution after step S2 reaction being poured into four-hole boiling flask, is cooled to 45-50 DEG C, is then added and uses 222 pyrroles of N2 methyl
The dihydromethyl propionic acid of alkanone dissolution, is warming up to 70-75 DEG C, react and be cooled to 30-35 DEG C after 1-3h, S4, fast light modifying agent
Allotment: the polyacrylate of selection and oxireme resin are added in electric mixer and are added than part according to corresponding measurement
The deionized water of required metering is that 400-500r/min stirs 30-40min with revolving speed, the allotment of fast light modifying agent can be completed,
The preparation of S5, light-resistant waterborne polyurethane coating: poly- ammonia made from step S3 is added in the UV absorbers that step S1 is measured
In ester lotion, 1-2h is stirred with the revolving speed of 600-700r/min using electric stirring mechanism, makes UV absorbers in polyurethane
It is sufficiently mixed in lotion, it is 800- with revolving speed that the fast light modifying agent for then deploying step S4, which is added in mixed emulsion,
The revolving speed of 1000r/min stirs 2-3h, is then allowed to stand 15-30min, light-resistant waterborne polyurethane coating can be obtained, it can be achieved that
Light resistance is added in polyurethane coating and improves component, first the whole light resistance of polyurethane material is promoted, is then led to again
UV absorbers and nano titanium dioxide photocatalyst are crossed, so that ultraviolet light is rapidly absorbed catalysis reaction, reaches well
To the purpose that the light resistance of polyurethane coating is more promoted, solve the problems, such as that polyurethane coating uses limitation,
Greatly improve the sunproof light resistance effect of polyurethane coating, can well be suitable for polyurethane coating light resistance require compared with
High environment, realizing keeps polyurethane coating more extensive using meeting, ensures that polyurethane coating can be used for a long time.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention provides a kind of three kinds of technical solutions: preparation of light-resistant waterborne polyurethane coating
Method specifically includes following embodiment:
Embodiment 1
The weighing of S1, ingredient component: 25 parts of polyethers binary of corresponding weight ratio part are measured respectively using weighing equipment first
Alcohol, 15 parts of dihydromethyl propionic acids, 15 parts of 22,42 diisocyanate of toluene, 7 parts of triethylamines, 3 parts of acetone, 15 parts of 222 pyrroles of N2 methyl
Pyrrolidone, 15 parts of fast light modifying agent, 15 parts of UV absorbers and 3 parts of nano titanium dioxide photocatalysts, and completed measuring
Each component pour into reagent pot save respectively；
S2, paint binder reaction prepare: by the polyether Glycols measured in step S1 under 110 DEG C of vacuum decompression dehydration
1h, dewatered polyether Glycols and 22,42 diisocyanate of toluene 33 DEG C at a temperature of be separately added into equipped with thermometer
In electric mixer, the nano titanium dioxide photocatalyst of corresponding weight ratio part is then added, is warming up to 77 DEG C, isothermal reaction
1.5-2h judges reaction end using n-Butylamine titration method；
The preparation of S3, aqueous polyurethane aqueous emulsion: the reaction solution after step S2 reaction is poured into four-hole boiling flask, is cooled to
47 DEG C, the dihydromethyl propionic acid dissolved with 222 pyrrolidones of N2 methyl is then added, is warming up to 73 DEG C, reacts cooling after 1-3h
To 33 DEG C, triethylamine neutralization reaction 7min is added, the acetone that corresponding weight ratio part is added in reaction process carries out viscosity reduction, is swashing
Under strong stirring, the deionized water measured needed for being added continues to stir 15min, is finally evaporated under reduced pressure out acetone, water can be obtained
Property aqueous emulsion of polyurethane, four-hole boiling flask be the condenser with CaCl2 drying tube；
The allotment of S4, fast light modifying agent: the polyacrylate of selection and oxireme resin are compared into part according to corresponding measurement
The deionized water for being added in electric mixer and measuring needed for being added is that 450r/min stirs 35min with revolving speed, can be completed
The allotment of fast light modifying agent, fast light modifying agent are made of 80% polyacrylate and 20% oxireme resin；
The preparation of S5, light-resistant waterborne polyurethane coating: step S3 system is added in the UV absorbers that step S1 is measured
In the polyaminoester emulsion obtained, 1.5h is stirred with the revolving speed of 650r/min using electric stirring mechanism, makes UV absorbers poly-
It is sufficiently mixed in urethane lotion, the fast light modifying agent for then deploying step S4 is added in mixed emulsion, is with revolving speed
The revolving speed of 900r/min stirs 2.5h, is then allowed to stand 23min, light-resistant waterborne polyurethane coating, UV Absorption can be obtained
Agent is the composition of septichen phenyl ester, benzotriazole and hexamethylphosphoramide.
Embodiment 2
The weighing of S1, ingredient component: 20 parts of polyethers binary of corresponding weight ratio part are measured respectively using weighing equipment first
Alcohol, 10 parts of dihydromethyl propionic acids, 10 parts of 22,42 diisocyanate of toluene, 5 parts of triethylamines, 1 part of acetone, 10 parts of 222 pyrroles of N2 methyl
Pyrrolidone, 10 parts of fast light modifying agent, 10 parts of UV absorbers and 1 part of nano titanium dioxide photocatalyst, and completed measuring
Each component pour into reagent pot save respectively；
S2, paint binder reaction prepare: by the polyether Glycols measured in step S1 under 100 DEG C of vacuum decompression dehydration
0.8h, dewatered polyether Glycols and 22,42 diisocyanate of toluene 25 DEG C at a temperature of be separately added into equipped with thermometer
Electric mixer in, the nano titanium dioxide photocatalyst of corresponding weight ratio part is then added, is warming up to 75 DEG C, isothermal reaction
1.5h judging reaction end using n-Butylamine titration method；
The preparation of S3, aqueous polyurethane aqueous emulsion: the reaction solution after step S2 reaction is poured into four-hole boiling flask, is cooled to
45 DEG C, the dihydromethyl propionic acid dissolved with 222 pyrrolidones of N2 methyl is then added, is warming up to 70 DEG C, is cooled to after reacting 1h
30 DEG C, triethylamine neutralization reaction 5min is added, the acetone that corresponding weight ratio part is added in reaction process carries out viscosity reduction, in fierceness
Stirring under, be added needed for measure deionized water, continue stir 10min, be finally evaporated under reduced pressure out acetone, can be obtained aqueous
Aqueous emulsion of polyurethane, four-hole boiling flask are the condenser with CaCl2 drying tube；
The allotment of S4, fast light modifying agent: the polyacrylate of selection and oxireme resin are compared into part according to corresponding measurement
The deionized water for being added in electric mixer and measuring needed for being added is that 400r/min stirs 30min with revolving speed, can be completed
The allotment of fast light modifying agent, fast light modifying agent are made of 80% polyacrylate and 20% oxireme resin；
The preparation of S5, light-resistant waterborne polyurethane coating: step S3 system is added in the UV absorbers that step S1 is measured
In the polyaminoester emulsion obtained, 1h is stirred with the revolving speed of 600r/min using electric stirring mechanism, makes UV absorbers in poly- ammonia
It is sufficiently mixed in ester lotion, it is 800r/ with revolving speed that the fast light modifying agent for then deploying step S4, which is added in mixed emulsion,
The revolving speed of min stirs 2h, is then allowed to stand 15min, and light-resistant waterborne polyurethane coating can be obtained, and UV absorbers are adjacent hydroxyl
The composition of yl benzoic acid phenyl ester and hexamethylphosphoramide.
Embodiment 3
The weighing of S1, ingredient component: 30 parts of polyethers binary of corresponding weight ratio part are measured respectively using weighing equipment first
Alcohol, 20 parts of dihydromethyl propionic acids, 20 parts of 22,42 diisocyanate of toluene, 10 parts of triethylamines, 5 parts of acetone, 20 parts of N2 methyl 222
Pyrrolidones, 20 parts of fast light modifying agent, 20 parts of UV absorbers and 5 parts of nano titanium dioxide photocatalysts, and will measure
At each component pour into reagent pot save respectively；
S2, paint binder reaction prepare: by the polyether Glycols measured in step S1 under 120 DEG C of vacuum decompression dehydration
1.2h, dewatered polyether Glycols and 22,42 diisocyanate of toluene 40 DEG C at a temperature of be separately added into equipped with thermometer
Electric mixer in, the nano titanium dioxide photocatalyst of corresponding weight ratio part is then added, is warming up to 80 DEG C, isothermal reaction
2h judges reaction end using n-Butylamine titration method；
The preparation of S3, aqueous polyurethane aqueous emulsion: the reaction solution after step S2 reaction is poured into four-hole boiling flask, is cooled to
50 DEG C, the dihydromethyl propionic acid dissolved with 222 pyrrolidones of N2 methyl is then added, is warming up to 75 DEG C, reacts cooling after 1-3h
To 35 DEG C, triethylamine neutralization reaction 10min is added, the acetone that corresponding weight ratio part is added in reaction process carries out viscosity reduction,
Under fierce stirring, the deionized water measured needed for being added continues to stir 20min, is finally evaporated under reduced pressure out acetone, can be obtained
Aqueous polyurethane aqueous emulsion, four-hole boiling flask are the condenser with CaCl2 drying tube；
The allotment of S4, fast light modifying agent: the polyacrylate of selection and oxireme resin are compared into part according to corresponding measurement
The deionized water for being added in electric mixer and measuring needed for being added is that 500r/min stirs 40min with revolving speed, can be completed
The allotment of fast light modifying agent, fast light modifying agent are made of 80% polyacrylate and 20% oxireme resin；
The preparation of S5, light-resistant waterborne polyurethane coating: step S3 system is added in the UV absorbers that step S1 is measured
In the polyaminoester emulsion obtained, 2h is stirred with the revolving speed of 700r/min using electric stirring mechanism, makes UV absorbers in poly- ammonia
It is sufficiently mixed in ester lotion, the fast light modifying agent for then deploying step S4 is added in mixed emulsion, is with revolving speed
The revolving speed of 1000r/min stirs 3h, is then allowed to stand 30min, light-resistant waterborne polyurethane coating, UV absorbers can be obtained
For septichen phenyl ester.
In summary
Present invention can be implemented in addition lights resistance in polyurethane coating to improve component, first fast light to the entirety of polyurethane material
Property promoted, then again by UV absorbers and nano titanium dioxide photocatalyst, be rapidly absorbed ultraviolet light and urge
Change reaction, has achieved the purpose that more to promote the light resistance of polyurethane coating well, solved polyurethane painting
The problem of material is using limitation, greatly improves the sunproof light resistance effect of polyurethane coating, can be suitable for well to poly-
The more demanding environment of urethane coating light resistance, realizing keeps polyurethane coating more extensive using meeting, ensures that poly- ammonia
Ester paint can be used for a long time.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of preparation method of light-resistant waterborne polyurethane coating, it is characterised in that: specifically includes the following steps:
The weighing of S1, ingredient component: the polyether Glycols of corresponding weight ratio part, dihydroxy first are measured respectively using weighing equipment first
Base propionic acid, 22,42 diisocyanate of toluene, triethylamine, acetone, 222 pyrrolidones of N2 methyl, fast light modifying agent, ultraviolet light are inhaled
Agent and nano titanium dioxide photocatalyst are received, and each component for measuring completion is poured into reagent pot respectively and is saved；
S2, paint binder reaction prepare: by the polyether Glycols measured in step S1 under 100-120 DEG C of vacuum decompression dehydration
0.8-1.2h, dewatered polyether Glycols and 22,42 diisocyanate of toluene 25-40 DEG C at a temperature of be separately added into and be equipped with
In the electric mixer of thermometer, the nano titanium dioxide photocatalyst of corresponding weight ratio part is then added, is warming up to 75-80
DEG C, isothermal reaction 1.5-2h；
The preparation of S3, aqueous polyurethane aqueous emulsion: the reaction solution after step S2 reaction is poured into four-hole boiling flask, 45- is cooled to
50 DEG C, the dihydromethyl propionic acid dissolved with 222 pyrrolidones of N2 methyl is then added, is warming up to 70-75 DEG C, reacts cold after 1-3h
But to 30-35 DEG C, triethylamine neutralization reaction 5-10min is added, the acetone that corresponding weight ratio part is added in reaction process carries out
Viscosity reduction, under fierce stirring, the deionized water measured needed for being added continues to stir 10-20min, is finally evaporated under reduced pressure out third
Aqueous polyurethane aqueous emulsion can be obtained in ketone；
The allotment of S4, fast light modifying agent: the polyacrylate of selection and oxireme resin are added according to corresponding measurement than part
The deionized water measured in electric mixer and needed for being added is that 400-500r/min stirs 30-40min with revolving speed
Complete the allotment of fast light modifying agent；
The preparation of S5, light-resistant waterborne polyurethane coating: the UV absorbers that step S1 is measured are added made from step S3
In polyaminoester emulsion, 1-2h is stirred with the revolving speed of 600-700r/min using electric stirring mechanism, makes UV absorbers poly-
It is sufficiently mixed in urethane lotion, the fast light modifying agent for then deploying step S4 is added in mixed emulsion, is with revolving speed
The revolving speed of 800-1000r/min stirs 2-3h, is then allowed to stand 15-30min, light-resistant waterborne polyurethane coating can be obtained.
2. a kind of preparation method of light-resistant waterborne polyurethane coating according to claim 1, it is characterised in that: the step
The each component of aqueous polyurethane coating includes: 20-30 parts of polyether Glycols, dihydromethyl propionic acid 10- by weight part in rapid S1
20 parts, 10-20 parts of 22,42 diisocyanate of toluene, 5-10 parts of triethylamine, 1-5 parts of acetone, 222 pyrrolidones 10-20 of N2 methyl
Part, modifying agent 10-20 parts fast light, 10-20 parts of UV absorbers, 1-5 parts of nano titanium dioxide photocatalyst and deionized water
Surplus.
3. a kind of preparation method of light-resistant waterborne polyurethane coating according to claim 1, it is characterised in that: the step
Fast light modifying agent is made of 80% polyacrylate and 20% oxireme resin in rapid S4.
4. a kind of preparation method of light-resistant waterborne polyurethane coating according to claim 1, it is characterised in that: the step
UV absorbers are one of septichen phenyl ester, benzotriazole or hexamethylphosphoramide or a variety of in rapid S5
Combination.
5. a kind of preparation method of light-resistant waterborne polyurethane coating according to claim 1, it is characterised in that: the step
Reaction end is judged using n-Butylamine titration method in rapid S2.
6. a kind of preparation method of light-resistant waterborne polyurethane coating according to claim 1, it is characterised in that: the step
Four-hole boiling flask in rapid S3 is the condenser with CaCl2 drying tube.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112961596A (en) * | 2021-03-23 | 2021-06-15 | 苏州燕雀新材料科技有限公司 | Preparation method of ultraviolet-resistant PU (polyurethane) coating |
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| EP1357141A1 (en) * | 2002-04-25 | 2003-10-29 | Sicpa Holding S.A. | A polyurethane resin derived from hydrophilic polyol components |
| CN106590395A (en) * | 2016-11-29 | 2017-04-26 | 安徽圆梦建筑有限公司 | Corrosion-resistance ultraviolet-resistant water-based coating |
| CN107353806A (en) * | 2017-06-23 | 2017-11-17 | 天长市巨龙车船涂料有限公司 | A kind of heat-resisting uvioresistant polyurethane coating |
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2019
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| EP1357141A1 (en) * | 2002-04-25 | 2003-10-29 | Sicpa Holding S.A. | A polyurethane resin derived from hydrophilic polyol components |
| CN106590395A (en) * | 2016-11-29 | 2017-04-26 | 安徽圆梦建筑有限公司 | Corrosion-resistance ultraviolet-resistant water-based coating |
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