CN116218342B - Preparation method of water-based double-component full-feel matte finish paint - Google Patents
Preparation method of water-based double-component full-feel matte finish paint Download PDFInfo
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- CN116218342B CN116218342B CN202310023827.3A CN202310023827A CN116218342B CN 116218342 B CN116218342 B CN 116218342B CN 202310023827 A CN202310023827 A CN 202310023827A CN 116218342 B CN116218342 B CN 116218342B
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- 239000003973 paint Substances 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- 239000000839 emulsion Substances 0.000 claims abstract description 39
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 36
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000005058 Isophorone diisocyanate Substances 0.000 claims abstract description 20
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 17
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 17
- 229920003009 polyurethane dispersion Polymers 0.000 claims abstract description 16
- 239000000080 wetting agent Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 12
- 230000000996 additive effect Effects 0.000 claims abstract description 12
- 239000012024 dehydrating agents Substances 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 8
- 238000013329 compounding Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 37
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 24
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 14
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 14
- 239000002562 thickening agent Substances 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 239000013530 defoamer Substances 0.000 claims description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000007795 chemical reaction product Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims description 6
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 4
- 235000013399 edible fruits Nutrition 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 2
- 230000004913 activation Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004062 sedimentation Methods 0.000 abstract description 4
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 13
- 238000000576 coating method Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000007665 sagging Methods 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- IUVCFHHAEHNCFT-INIZCTEOSA-N 2-[(1s)-1-[4-amino-3-(3-fluoro-4-propan-2-yloxyphenyl)pyrazolo[3,4-d]pyrimidin-1-yl]ethyl]-6-fluoro-3-(3-fluorophenyl)chromen-4-one Chemical compound C1=C(F)C(OC(C)C)=CC=C1C(C1=C(N)N=CN=C11)=NN1[C@@H](C)C1=C(C=2C=C(F)C=CC=2)C(=O)C2=CC(F)=CC=C2O1 IUVCFHHAEHNCFT-INIZCTEOSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/45—Anti-settling agents
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a preparation method of a water-based double-component full-matte skin-feel finishing paint, which comprises the following steps: step one, preparing a component A: adding an aqueous matte polyurethane dispersion into a proper container, adding a defoaming agent, a wetting agent and anti-settling slurry, adding PMMA powder, dispersing at a high speed until no shrinkage cavity exists, then sequentially adding a film forming additive, wax emulsion and water, dispersing for 8-15min, and adjusting viscosity for later use; step two, preparing a component B: fully and uniformly stirring an HDI polyisocyanate curing agent and an IPDI polyisocyanate curing agent, adding PMA and a dehydrating agent, and sealing for later use; step three, the component A and the component B are mixed according to the mass ratio of (8-15): and 1, compounding to obtain the water-based double-component full-matte skin-feel finish paint. According to the invention, the self-made anti-sedimentation slurry is added, so that the anti-sedimentation performance of the finish paint can be remarkably improved, and particularly, the fumed silica is modified by adding the functionalized graphene oxide, so that the technical effect of an ultra-long activation period is achieved.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a preparation method of a water-based double-component full-feel matt finish paint.
Background
The wood lacquer is visible everywhere in daily life, has not only decorative and beautification effects, but also has good protection effect on wood. However, most of the currently used wood coating is solvent-based and contains a large amount of organic Volatile Organic Compounds (VOC), which seriously endangers the health of production and construction personnel and pollutes the environment. The water-based wood paint is developed in nearly twenty years, the technology and the market are improved, and especially the skin-feel matt paint series is formed into a net red effect in the current furniture paint market due to the matt color, smooth hand feeling, good stain resistance, scratch resistance and wear resistance.
As is known, the water-based two-component paint has obviously improved comprehensive performance compared with single component due to the addition of the curing agent to assist in film formation, and particularly has more outstanding performances in water resistance, stain resistance, hardness and the like. However, the two-component system has the problem of short pot life (pot life): the-OH groups contained in the main paint react with the-NCO groups in the curing agent, the viscosity gradually rises until the main paint hardens, and the current water-based double-component finishing paint on the market can be used for 2-3 hours. Chinese patent 202111360548.3 applied for a two-component aqueous full-matt high scratch-resistant skin feel finishing paint with a service time of 3 hours. Chinese patent 202111408563.0 applies for a water-based double-component full-matt skin-feel finishing paint and a preparation method thereof, wherein the activation period is prolonged, but the viscosity is increased by nearly 1 time (from 35 seconds to 65 seconds) within 5 hours, the glossiness is 10-11 degrees, the full-matt state is not reached, and the full-matt state is within 5 degrees by default in the industry generally. Chinese patent CN113817396A discloses a water-based home decoration skin-feel matt finish paint and a production process thereof, wherein polycarbonate and polycarbonate-polycarbonate modified resin are used as film forming substances, the cost of raw materials is high, the specific glossiness is not described, and the water-based home decoration skin-feel matt finish paint is a single component. Chinese patent CN 112680041A discloses a water-based skin-feel wood coating and its preparation method, also a single component.
At present, the conventional water-based skin-feel paint on the market cannot achieve double-component ultra-long activation period and full matte, and further application of the paint is limited.
Disclosure of Invention
Based on the technical problems in the background technology, the invention provides a preparation method of a water-based double-component full-feel matte finish paint.
The technical scheme of the invention is as follows:
a preparation method of an aqueous two-component full-feel matt finishing paint comprises the following steps:
step one, preparing a component A:
(1) Adding the aqueous matte polyurethane dispersion into a proper container, adding the defoamer, the wetting agent and the anti-settling slurry at 400-800rpm, and stirring for 8-15min;
(2) Adding PMMA powder at a rotation speed of 300-400rpm, and dispersing at a high speed of 1000-1200rpm for 25-35min until no shrinkage cavity exists, wherein the fineness is less than 40 micrometers;
(3) Sequentially adding a film forming additive, wax emulsion and water at 600-800rpm for dispersing for 8-15min, and adjusting the viscosity to 60-80s (a cup No. 4 in a rock field) by using a thickening agent for standby;
step two, preparing a component B: fully and uniformly stirring an HDI polyisocyanate curing agent and an IPDI polyisocyanate curing agent, adding PMA and a dehydrating agent, and sealing for later use;
step three, the component A and the component B are mixed according to the mass ratio of (8-15): 1, the water-based double-component full-matte finishing paint with skin feel can be obtained after compounding.
Preferably, the aqueous double-component full-feel matte finish paint comprises a component A consisting of the following components in parts by weight: 65-85 parts of water-based matte emulsion, 0.2-0.6 part of defoamer, 0.1-0.5 part of wetting agent, 1-3 parts of anti-settling slurry, 2-8 parts of PMMA powder, 3-6 parts of film forming additive, 2-5 parts of wax emulsion, 0.2-0.8 part of thickener and 5-15 parts of water.
Preferably, the water-based double-component full-matte skin-feel finishing paint comprises a component B in parts by weight as follows: 40-80 parts of IPDI polyisocyanate curing agent, 15-40 parts of HDI polyisocyanate curing agent, 10.8-20.8 parts of PMA (propylene glycol methyl ether acetate) and 0.2 part of dehydrating agent.
Preferably, the aqueous matte emulsion is an aqueous matte polyurethane dispersion or a mixed emulsion of the aqueous matte polyurethane dispersion and an aqueous acrylic emulsion.
Further preferably, the aqueous matte polyurethane dispersion is any one or a combination of a plurality of honeycomb 1102, 1103, high 1212, diesman 1001, 1010 and taiwan super-bright M-712.
Further preferably, the aqueous acrylic emulsion is mountain flower 8020.
Preferably, the defoamer is Tego-810, the thickener is German Ming Ling PUR42, the film forming additive is Dow DPM, the PMMA powder is GPI-04 powder of Taiwan Gao you, the wax emulsion is Jie W-801A crystal, and the wetting agent is Tego-4100; the IPDI polyisocyanate curing agent is Guanzhong OS-9402; the HDI polyisocyanate curing agent is bayer 2655.
Preferably, the anti-settling slurry is self-made anti-settling slurry, and the preparation method comprises the following steps:
A. soaking fumed silica in ammonia water and performing ultrasonic treatment to obtain pre-dispersed particles;
B. taking anhydrous DMF (dimethyl formamide) added with graphene oxide, performing ultrasonic dispersion for 60-90min, adding MDI, and stirring for 2-3h at 80-85 ℃; cooling after the reaction is finished, washing a reaction product with anhydrous N, N-dimethylformamide for 3 times, centrifugally separating, and drying in vacuum to obtain the diphenylmethane diisocyanate functionalized graphene oxide;
C. and adding diphenylmethane diisocyanate functionalized graphene oxide into the pre-dispersion liquid, fully dispersing and mixing, and filtering to obtain the modified graphene oxide.
Further preferably, in the step C, the mass ratio of the pre-dispersion liquid to the diphenylmethane diisocyanate functionalized graphene oxide is 100: (0.1-0.2).
The invention has the advantages that: according to the preparation method of the double-component skin-feel full-matt finishing paint, the adopted curing agent is selected to be used by matching with the HDI curing agent and the IPDI curing agent, so that the activation period is obviously prolonged; the gel is formed by only using the HDI curing agent for 2-3 hours without reaching the ultra-long activation period.
The full-matt surface paint with double-component skin feeling is mainly determined by matt emulsion, and the water-based matt polyurethane dispersoid is selected, so that good physical properties are reflected by matching with a curing agent.
According to the double-component full-feel skin-matt finishing paint, the self-made anti-sedimentation slurry is added, so that the anti-sedimentation performance of the finishing paint can be remarkably improved, and particularly, the fumed silica is modified by adding the functionalized graphene oxide, so that the technical effect of an ultra-long activation period is achieved.
The double-component full-feel matt finishing paint has the following technical effects:
(1) Very long activation period: the prepared usable time is more than 6 hours;
(2) Full matt gloss: the glossiness of the prepared full-matte finish paint with the skin feel is below 5 degrees;
(3) The scratch resistance and the water resistance of the paint film are improved by adding PMMA powder.
Detailed Description
Examples 1 to 4
And (3) selecting different parts by weight of aqueous matte polyurethane dispersoid, aqueous acrylic emulsion and the rest components as raw materials to prepare a component A, wherein the total amount of the components A is 4. The specific group A compositions are shown in Table 1, for example A1, example A2, example A3, example A4, respectively.
TABLE 1A composition of examples 1-4;
the anti-settling slurry is self-made anti-settling slurry, and the preparation method comprises the following steps:
A. 1kg of fumed silica is soaked in 15kg of ammonia water and subjected to ultrasonic treatment to obtain pre-dispersed particles; the ammonia water is 25wt% ammonia water;
B. taking 100mg of graphene oxide, adding 50mL of anhydrous DMF, performing ultrasonic dispersion for 75min, adding 3 mM DI, and stirring at 80 ℃ for 2.5h; after the reaction is finished, cooling, washing a reaction product with anhydrous N, N-dimethylformamide for 3 times, wherein 15 milliliters of anhydrous N, N-dimethylformamide is used each time; centrifugal separation and vacuum drying are carried out, and the diphenyl methane diisocyanate functionalized graphene oxide is obtained;
C. and adding diphenylmethane diisocyanate functionalized graphene oxide into the pre-dispersion liquid, fully dispersing and mixing, and filtering to obtain the modified graphene oxide.
In the step C, the mass ratio of the pre-dispersion liquid to the diphenylmethane diisocyanate functionalized graphene oxide is 100:0.15.
the specific preparation process of the component A comprises the following steps:
(1) Adding water-based matte materials 1 and 2 and 3, 4 and 5 at 400-800rpm into a proper jar, and stirring for 10min;
(2) Adding into the mixture at a speed of 300-400rpm for 6, dispersing at a high speed of 1000-1200rpm for 30min until no shrinkage cavity exists, wherein the fineness is less than 40 microns;
(3) Adding 7, 8 and 10 in turn at 600-800rpm for dispersing for 10min, adjusting viscosity to 60-80s (cup No. 4 in the field) with 9, and checking.
The composition of the B component is shown in Table 2 by selecting different parts by weight of HDI polyisocyanate curing agent, IPDI polyisocyanate curing agent, PMA and dehydrating agent.
Table 2 the composition of the B component of examples 1-4;
the specific preparation process of the component B comprises the following steps:
and (3) fully and uniformly stirring the components 1-2, adding the components 3 and 4, and sealing for later use.
Component A examples 1-4 and component B example 1 were prepared according to A: b=10: 1, and the performance results are shown in table 3:
table 3: detecting physical properties of the sample;
as can be seen from the table, the compound glossiness of the A examples 1-4 and the B example 1 can be fully matte with the glossiness below 5 degrees, and the viscosity is not greatly increased in the activation period of 6 hours after the compound glossiness is prepared, so that the compound glossiness can still be used. Wherein example A4 showed minimal viscosity build. The following compounding of A example 4 with B examples 1-3, respectively, gave the performance test results shown in Table 4:
table 4: detecting physical properties of the sample;
from the above results, it can be seen that the results of example 4A and examples 1 to 3B show that the more the IPDI polyisocyanate curing agent is blended, the less the viscosity increases significantly, and the longer the pot life, the less the HDI polyisocyanate curing agent, and the water resistance becomes poor. Taking the activation period and the tolerance into consideration, selecting an optimal effect of the A embodiment 4 and the B embodiment 2;
the main resin selected by the scheme is water-based matte polyurethane dispersoid, has good skin feel effect, and has gloss of less than 5 degrees of full matte after being compounded with a curing agent;
the aqueous acrylic emulsion adopted by the scheme is flower and fruit mountain 8020, the Tg is as high as 50 ℃, and the high hardness and the high resistance can be provided;
the IPDI curing agent used in the scheme is OS-9402 in the Guanzhong state, and the HDI curing agent uses 2655 of Bayer, so that the good usable time of the IPDI polyisocyanate curing agent is represented, and the quick-drying property and the tolerance of the HDI polyisocyanate are maintained;
the PMMA powder used in the scheme is GPI-04 powder with the average particle size of 4 mu m for high-head in Taiwan, and the water resistance and scratch resistance are further improved while the transparency of a paint film is maintained.
Example 5
A preparation method of an aqueous two-component full-feel matt finishing paint comprises the following steps:
step one, preparing a component A:
(1) Adding the aqueous matte polyurethane dispersion into a proper container, adding the defoamer, the wetting agent and the anti-settling slurry at 750rpm, and stirring for 12min;
(2) Adding PMMA powder at a rotation speed of 350rpm, and dispersing at a high speed at a rotation speed of 1050rpm for 30min until no shrinkage cavity exists, wherein the fineness is less than 40 microns;
(3) Sequentially adding a film forming additive, wax emulsion and water at 700rpm for 12min, and adjusting the viscosity to 60-80s (a cup No. 4 in a rock field) by using a thickening agent for standby;
step two, preparing a component B: fully and uniformly stirring an HDI polyisocyanate curing agent and an IPDI polyisocyanate curing agent, adding PMA and a dehydrating agent, and sealing for later use;
step three, the component A and the component B are mixed according to the mass ratio of 10:1, the water-based double-component full-matte finishing paint with skin feel can be obtained after compounding.
The water-based double-component full-feel matt finishing paint comprises a component A, wherein the component A comprises the following components in parts by weight: 70 parts of aqueous matte emulsion, 0.5 part of defoamer, 0.3 part of wetting agent, 2.5 parts of anti-settling slurry, 5 parts of PMMA powder, 4 parts of film forming auxiliary agent, 3 parts of wax emulsion, 0.5 part of thickener and 12 parts of water.
The water-based double-component full-feel matt finishing paint comprises a component B in parts by weight: 55 parts of IPDI polyisocyanate curing agent, 28 parts of HDI polyisocyanate curing agent, 15.5 parts of PMA (propylene glycol methyl ether acetate) and 0.2 part of dehydrating agent.
The aqueous matte emulsion is an aqueous matte polyurethane dispersion. The aqueous matte polyurethane dispersion is honeycomb 1102;
the aqueous acrylic emulsion is flower and fruit mountain 8020; the defoaming agent is Tego-810, the thickening agent is German Ming Ling PUR42, the film forming additive is Dow DPM, the PMMA powder is GPI-04 powder of high-you Taiwan, the wax emulsion is Jie W-801A crystal, and the wetting agent is Tego-4100; the IPDI polyisocyanate curing agent is Guanzhong OS-9402; the HDI polyisocyanate curing agent is bayer 2655.
The anti-settling slurry is self-made anti-settling slurry, and the preparation method comprises the following steps:
A. 1kg of fumed silica is soaked in 15kg of ammonia water and subjected to ultrasonic treatment to obtain pre-dispersed particles; the ammonia water is 20wt% ammonia water;
B. taking 100mg of graphene oxide, adding 50mL of anhydrous DMF, performing ultrasonic dispersion for 65min, adding 3 mM DI, and stirring at 80 ℃ for 2.2h; after the reaction is finished, cooling, washing a reaction product with anhydrous N, N-dimethylformamide for 3 times, wherein 15 milliliters of anhydrous N, N-dimethylformamide is used each time; centrifugal separation and vacuum drying are carried out, and the diphenyl methane diisocyanate functionalized graphene oxide is obtained;
C. and adding diphenylmethane diisocyanate functionalized graphene oxide into the pre-dispersion liquid, fully dispersing and mixing, and filtering to obtain the modified graphene oxide.
In the step C, the mass ratio of the pre-dispersion liquid to the diphenylmethane diisocyanate functionalized graphene oxide is 100:0.17.
example 6
A preparation method of an aqueous two-component full-feel matt finishing paint comprises the following steps:
step one, preparing a component A:
(1) Adding the aqueous matte polyurethane dispersion into a proper container, adding the defoamer, the wetting agent and the anti-settling slurry at 800rpm, and stirring for 15min;
(2) Adding PMMA powder at a rotation speed of 300rpm, and dispersing at a high speed at a rotation speed of 1200rpm for 25-35min until no shrinkage cavity exists, wherein the fineness is less than 40 microns;
(3) Sequentially adding a film forming additive, wax emulsion and water at 600rpm for 15min, and adjusting the viscosity to 60-80s (a cup No. 4 in a rock field) by using a thickening agent for standby;
step two, preparing a component B: fully and uniformly stirring an HDI polyisocyanate curing agent and an IPDI polyisocyanate curing agent, adding PMA and a dehydrating agent, and sealing for later use;
step three, the component A and the component B are mixed according to the mass ratio of 8:1, the water-based double-component full-matte finishing paint with skin feel can be obtained after compounding.
The water-based double-component full-feel matt finishing paint comprises a component A, wherein the component A comprises the following components in parts by weight: 65 parts of water-based matte emulsion, 0.6 part of defoamer, 0.1 part of wetting agent, 3 parts of anti-settling slurry, 2 parts of PMMA powder, 6 parts of film forming auxiliary agent, 2 parts of wax emulsion, 0.8 part of thickener and 5 parts of water.
The water-based double-component full-feel matt finishing paint comprises a component B in parts by weight: 80 parts of IPDI polyisocyanate curing agent, 15 parts of HDI polyisocyanate curing agent, 20.8 parts of PMA (propylene glycol methyl ether acetate) and 0.2 part of dehydrating agent.
The aqueous matte emulsion is a mixed emulsion of aqueous matte polyurethane dispersion and aqueous acrylic emulsion in a mass ratio of 8:5.
The aqueous matte polyurethane dispersion is high 1212;
the aqueous acrylic emulsion is flower and fruit mountain 8020; the defoaming agent is Tego-810, the thickening agent is German Ming Ling PUR42, the film forming additive is Dow DPM, the PMMA powder is GPI-04 powder of high-you Taiwan, the wax emulsion is Jie W-801A crystal, and the wetting agent is Tego-4100; the IPDI polyisocyanate curing agent is Guanzhong OS-9402; the HDI polyisocyanate curing agent is bayer 2655.
The anti-settling slurry is self-made anti-settling slurry, and the preparation method comprises the following steps:
A. 1kg of fumed silica is soaked in 12kg of ammonia water and subjected to ultrasonic treatment to obtain pre-dispersed particles; the ammonia water is 25wt% ammonia water;
B. taking anhydrous DMF added with graphene oxide, performing ultrasonic dispersion for 90min, adding MDI, and stirring for 3h at 80 ℃; cooling after the reaction is finished, washing a reaction product with anhydrous N, N-dimethylformamide for 3 times, centrifugally separating, and drying in vacuum to obtain the diphenylmethane diisocyanate functionalized graphene oxide;
C. and adding diphenylmethane diisocyanate functionalized graphene oxide into the pre-dispersion liquid, fully dispersing and mixing, and filtering to obtain the modified graphene oxide.
In the step C, the mass ratio of the pre-dispersion liquid to the diphenylmethane diisocyanate functionalized graphene oxide is 100:0.1.
example 7
A preparation method of an aqueous two-component full-feel matt finishing paint comprises the following steps:
step one, preparing a component A:
(1) Adding the aqueous matte polyurethane dispersion into a proper container, adding the defoamer, the wetting agent and the anti-settling slurry at 400rpm, and stirring for 15min;
(2) Adding PMMA powder at a rotation speed of 300rpm, and dispersing at a high speed at a rotation speed of 1200rpm for 25-35min until no shrinkage cavity exists, wherein the fineness is less than 40 microns;
(3) Sequentially adding a film forming additive, wax emulsion and water at 600rpm for 15min, and adjusting the viscosity to 60-80s (a cup No. 4 in a rock field) by using a thickening agent for standby;
step two, preparing a component B: fully and uniformly stirring an HDI polyisocyanate curing agent and an IPDI polyisocyanate curing agent, adding PMA and a dehydrating agent, and sealing for later use;
step three, the component A and the component B are mixed according to the mass ratio of 15:1, the water-based double-component full-matte finishing paint with skin feel can be obtained after compounding.
The water-based double-component full-feel matt finishing paint comprises a component A, wherein the component A comprises the following components in parts by weight: 65 parts of water-based matte emulsion, 0.6 part of defoamer, 0.1 part of wetting agent, 3 parts of anti-settling slurry, 2 parts of PMMA powder, 6 parts of film forming auxiliary agent, 2 parts of wax emulsion, 0.8 part of thickener and 5 parts of water.
The water-based double-component full-feel matt finishing paint comprises a component B in parts by weight: 80 parts of IPDI polyisocyanate curing agent, 15 parts of HDI polyisocyanate curing agent, 20.8 parts of PMA (propylene glycol methyl ether acetate) and 0.2 part of dehydrating agent.
The aqueous matte emulsion is an aqueous matte polyurethane dispersion.
The aqueous matte polyurethane dispersion is a combination of high 1212 and Dissman 1001 with a mass ratio of 3:1;
the anti-settling slurry is self-made anti-settling slurry, and the preparation method comprises the following steps:
A. 1kg of fumed silica is soaked in 18kg of ammonia water and subjected to ultrasonic treatment to obtain pre-dispersed particles; the ammonia water is 15wt% ammonia water;
B. taking anhydrous DMF (dimethyl formamide) added with graphene oxide, performing ultrasonic dispersion for 60min, adding MDI, and stirring for 2h at 85 ℃; cooling after the reaction is finished, washing a reaction product with anhydrous N, N-dimethylformamide for 3 times, centrifugally separating, and drying in vacuum to obtain the diphenylmethane diisocyanate functionalized graphene oxide;
C. and adding diphenylmethane diisocyanate functionalized graphene oxide into the pre-dispersion liquid, fully dispersing and mixing, and filtering to obtain the modified graphene oxide.
In the step C, the mass ratio of the pre-dispersion liquid to the diphenylmethane diisocyanate functionalized graphene oxide is 100:0.2.
comparative example 1
The self-made anti-settling slurry in the example 5 is replaced by the polyamide wax anti-settling slurry purchased in the market, and the types, the mass fractions and the preparation methods of the rest raw materials are the same.
Comparative example 2
The diphenylmethane diisocyanate functionalized graphene oxide in the self-made anti-settling slurry in the embodiment 5 is replaced by unmodified graphene oxide, and the types, mass fractions and preparation methods of the rest raw materials are the same.
Comparative example 3
The self-made anti-settling slurry in the example 5 is replaced by the modified fumed silica in the preparation example 1 of the Chinese invention patent CN114058263A, and the types, the mass fractions and the preparation methods of the rest raw materials are the same.
The topcoats prepared in example 5 and comparative examples 1 to 3 were subjected to physical property comparison test, and the results obtained are shown in Table 5.
Sagging test principle: a small amount of color paint is scraped and coated into 10 parallel wet films with different thicknesses (the thickness depends on the groove depth of each groove of the groove scraper) on a bottom plate along the length direction by adopting a multi-groove scraper, the width of each wet film is 6mm, the distance between adjacent coating films is 1.5mm, and the thickness difference between the adjacent coating films is 25 mu m (each sagging tester is provided with three multi-groove scrapers, and the testing ranges are 50-275 mu m, 250-475 mu m and 450-675 mu m respectively). After the coating is scraped, the base plate is vertically placed, and 10 coating films are sequentially arranged from top to bottom. The thickness (μm) of the thickest one of the coating films on the base plate, which had no sagging marks, was observed and recorded and used to characterize sagging of the topcoat.
Table 5: detecting physical properties of the sample;
from the test data, the invention can obviously improve the storage stability and sagging property of the finish paint by adding the diphenylmethane diisocyanate functionalized graphene oxide into the self-made anti-settling slurry.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. The preparation method of the water-based double-component full-feel matte finish paint is characterized by comprising the following steps of:
step one, preparing a component A:
(1) Adding the water-based matte emulsion into a proper container, adding the defoamer, the wetting agent and the anti-settling slurry at 400-800rpm, and stirring for 8-15min;
(2) Adding PMMA powder at a rotation speed of 300-400rpm, and dispersing at a high speed of 1000-1200rpm for 25-35min until no shrinkage cavity exists, wherein the fineness is less than 40 micrometers;
(3) Sequentially adding a film forming additive, wax emulsion and water at 600-800rpm for dispersing for 8-15min, and adjusting the viscosity to 60-80s by using a thickener, wherein the viscosity is tested by using a rock field No. 4 cup for later use;
step two, preparing a component B: fully and uniformly stirring an HDI polyisocyanate curing agent and an IPDI polyisocyanate curing agent, adding PMA and a dehydrating agent, and sealing for later use;
step three, the component A and the component B are mixed according to the mass ratio of (8-15): 1, compounding to obtain the water-based double-component full-matte skin-feel finish paint;
the A component of the finish paint consists of the following components in parts by weight: 65-85 parts of water-based matte emulsion, 0.2-0.6 part of defoamer, 0.1-0.5 part of wetting agent, 1-3 parts of anti-settling slurry, 2-8 parts of PMMA powder, 3-6 parts of film forming additive, 2-5 parts of wax emulsion, 0.2-0.8 part of thickener and 5-15 parts of water;
the component B of the finish paint consists of the following components in parts by weight: 40-80 parts of IPDI polyisocyanate curing agent, 15-40 parts of HDI polyisocyanate curing agent, 10.8-20.8 parts of PMA and 0.2 part of dehydrating agent;
the aqueous matte emulsion is an aqueous matte polyurethane dispersion or a mixed emulsion of the aqueous matte polyurethane dispersion and an aqueous acrylic emulsion;
the anti-settling slurry is self-made anti-settling slurry, and the preparation method comprises the following steps:
A. soaking fumed silica in ammonia water and performing ultrasonic treatment to obtain a pre-dispersion liquid;
B. adding graphene oxide into anhydrous DMF, performing ultrasonic dispersion for 60-90min, adding MDI, and stirring at 80-85 ℃ for 2-3h; cooling after the reaction is finished, washing a reaction product with anhydrous N, N-dimethylformamide for 3 times, centrifugally separating, and drying in vacuum to obtain the diphenylmethane diisocyanate functionalized graphene oxide;
C. and adding diphenylmethane diisocyanate functionalized graphene oxide into the pre-dispersion liquid, fully dispersing and mixing, and filtering to obtain the modified graphene oxide.
2. The method for preparing the aqueous two-component skin-feel full-matt finishing paint according to claim 1, which is characterized in that the aqueous acrylic emulsion is flower and fruit mountain 8020; the defoaming agent is Tego-810, the thickening agent is German Ming Ling PUR42, the film forming additive is Dow DPM, the PMMA powder is GPI-04 powder of high-you Taiwan, the wax emulsion is Jie W-801A crystal, and the wetting agent is Tego-4100; the IPDI polyisocyanate curing agent is Guanzhong OS-9402; the HDI polyisocyanate curing agent is bayer 2655.
3. The method for preparing the aqueous two-component skin-feel full-matt finishing paint according to claim 1, wherein in the step C, the mass ratio of the pre-dispersion liquid to the diphenylmethane diisocyanate functionalized graphene oxide is 100: (0.1-0.2).
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