CN108795176B - Mirror-effect double-component top-coat paint with thick coating and no miliaria - Google Patents
Mirror-effect double-component top-coat paint with thick coating and no miliaria Download PDFInfo
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- CN108795176B CN108795176B CN201810507573.1A CN201810507573A CN108795176B CN 108795176 B CN108795176 B CN 108795176B CN 201810507573 A CN201810507573 A CN 201810507573A CN 108795176 B CN108795176 B CN 108795176B
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
Abstract
The invention discloses a double-component high-gloss top-coat paint which is thick and free of miliaria, and the top-coat paint comprises a main agent, a water-based curing agent and water, wherein the main agent comprises the following raw materials in parts by weight: 75-90 parts of water-based emulsion, 2-10 parts of film-forming additive, 0.1-1 part of defoaming agent, 0.2-1 part of base material wetting agent, 1-2 parts of slow drying additive, 0.1-1 part of pH regulator, 0.2-0.4 part of preservative, 0.2-3 parts of thickening agent and 2.2-20.5 parts of deionized water. The clear finish paint utilizes the difference of-NCO reaction rates of hydroxyl in different emulsions and different curing agents to enable two components in the two-component paint to form gradient reaction, and meanwhile, a slow-drying film forming aid and a special slow-drying aid are added to enable most of the hydroxyl and gas generated by NCO reaction in a film wetting stage to migrate out of a paint film, so that the purpose of preventing miliaria is achieved by proper thick coating, the paint film is good in leveling property after being dried, the miliaria phenomenon is avoided, and the ideal high-light mirror surface effect is presented.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a mirror-effect two-component top-coat paint which is thick and does not generate miliaria.
Background
The aqueous two-component coating consists of aqueous hydroxyl emulsion and aqueous isocyanate curing agent, and physical film forming and chemical film forming are usually not isolated and are often alternately and overlappingly carried out in the drying and curing process of the paint. In the drying process of the water-based two-component coating, along with the volatilization of water, the latex particles are extruded and deformed to form a physical film, and meanwhile, the hydroxyl emulsion and the isocyanate curing agent are subjected to chemical crosslinking reaction to form a flat, compact and net-shaped paint film. After the two components are stirred and mixed, the risk of paint film defects such as dark bubbles, pinholes, miliaria and the like in the drying process of the water-based two-component coating is obviously higher than that of solvent-based PU, especially in the high-temperature and high-humidity environment in summer. Which greatly influences the acceptance of the downstream application link to the water-based two-component coating.
The fundamental reasons for the miliaria of paint films are as follows: in the drying process of the coating film, bubbles in the coating film are not completely released due to volatilization of the solvent and progress of the crosslinking reaction. The reason that the water-based two-component coating is in a water environment and the drying is influenced by relative humidity is more obvious than that of the solvent-based PU because the water-based two-component coating is in the water environment and the water-based two-component coating is in a relatively wet environment.
Disclosure of Invention
The invention aims to solve the problem that a coating film is easy to generate dark bubbles, needle eyes and miliaria when the water-based two-component high-gloss top-coat paint is coated, and provides a mirror-surface-effect two-component top-coat paint which is thick and does not generate miliaria.
The purpose of the invention is realized by the following technical scheme:
the two-component high-gloss top-coat paint is thick and free of miliaria, and comprises a main agent, a water-based curing agent and water, wherein the main agent comprises the following raw materials in parts by weight:
further, the weight ratio of the main agent to the water-based curing agent to water in the clear finish paint is 100: 15-20: 15-25.
Preferably, the aqueous emulsion is two or more of A2470, A2651, U XP2766, MT-510, VSM6299W/42WA, 2042, 6516, STW168, AC2598, 938T, 6810, XK-103, WE-6173, U9900, UH2593/1, E-129, 3AH 50W;
the film-forming auxiliary agent is one or more of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, dipropylene glycol butyl ether, propylene glycol, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol butyl ether, propylene glycol phenyl ether, diisobutyl diformate and OE 300;
the defoaming agent is one or more of Tego901W, Tego810, Tego902W, BYK025 and BYK 028;
the substrate wetting agent is one or more of Coatosil1211, Tego Wet KL 245, Tego Wet270 and BYK-346;
the slow drying auxiliary agent is one of BYK-AQ or BYK-WS;
the pH regulator is one or more of AMP-95, CH27 and sodium bicarbonate;
the preservative is one or more of QK20, LX300 and 551S, Rocima 342;
the thickener is one or more of RM-8W, PUR60, PUR69, RM-2020, XS71 and Rheolate 299.
Preferably, the aqueous curing agent is one or more of Aquolin 268, XP 2655, Bayer Bayhydur 401-60, XL 600, and X EZ-D803.
According to the invention, hydroxypropyl emulsions with different hydroxyl contents and different reaction rates with the curing agent are compounded, and the curing agents with different reaction rates are selected and matched in a proper proportion, so that various components in a two-component system are hardened at different stages of film forming of a paint film and present a certain gradient; proper slow-drying film forming assistant and other special slow-drying assistant are added to prolong the surface drying time of the paint film, so that the main agent and the curing agent as well as the gas generated by the side reaction of the curing agent and water have enough time to migrate out of the paint film which is not dried, thereby achieving the effect of preventing miliaria when the paint is properly thick.
The invention has the following beneficial effects:
according to the mirror-effect two-component top-coat paint with no miliaria during thick coating, the two components in the two-component paint form gradient reaction by utilizing the difference of-NCO reaction rates of hydroxyl in different emulsions and different curing agents, and meanwhile, by adding the slow-drying film-forming aid and the special slow-drying aid, most of the hydroxyl and gas generated by reaction of NCO in a wet film stage are moved out of a paint film, so that the purpose that the prickly heat is not generated during proper thick coating (wet film is 150-250 mu m) is achieved, the paint film is good in leveling property after being dried, has no miliaria phenomenon, and presents an ideal high-light mirror effect; the paint disclosed by the invention also has the advantages of strong environmental adaptability, environmental friendliness, energy conservation, safety, convenience in use and the like, and has excellent product performance and high cost performance.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
The raw materials in the embodiment of the invention are all commercially available products, wherein:
the aqueous emulsion is preferably A2470 (Bayer), A2651 (Bayer), U XP2766 (Bayer), MT-510 (Badhu), VSM6299W/42WA (Nepetes), 2042 (Vanhua), 6516 (Nepetes), STW168 (Wallace), AC2598 (Opado), 938T (Pasteur), 6810 (Nepetes), XK-103 (Diseman), WE-6173 (Bohai Fine chemical), U9900 (Ophiodi), UH2593/1 (Bayer), E-129 (Diseman), 3AH50W (GagmingTongdoude);
the film-forming auxiliary agent is preferably TEXANOL (2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate), DPNB (dipropylene glycol butyl ether), propylene glycol, DPM (dipropylene glycol methyl ether), TPM (tripropylene glycol methyl ether), PNB (propylene glycol butyl ether), PPH (propylene glycol phenyl ether), DIB (diisobutyl diformate), OE300 (Istman);
the antifoaming agent is preferably Tego901W (digao), Tego810 (digao), Tego902W (digao), BYK025 (Beck chemistry), BYK028 (Beck chemistry);
preferred substrate wetting agents are Coatosil1211 (Mimeji drawing), Tego Wet KL 245 (digao), Tego Wet270 (digao), BYK-346 (Beck chemistry);
the slow drying auxiliary agent is preferably BYK-AQ (Pico chemistry), BYK-WS (Pico chemistry);
the pH regulator is preferably AMP-95 (Dow), CH27 (Shanghai fine), or sodium bicarbonate;
the antiseptic is preferably QK20 (Dow), LX300 (Dow), 551S (Dow), Rocima342 (Dow);
the thickener is preferably RM-8W (Dow), PUR60 (chemical industry of Ming Ling), PUR69 (chemical industry of Ming Ling), RM-2020 (Dow), XS71 (Gaotai), Rheolate299 (Heming);
the aqueous curing agent is preferably Aquolin 268 (Wawa), XP 2655 (Bayer), Bayer Bayhydur 401-60 (Bayer), XL 600 (Paston), X EZ-D803 (Paston).
Example 1
A mirror-effect double-component top-coat paint which is not prone to miliaria when being thickly coated is prepared by weighing the following raw materials in parts by weight: 75 parts of aqueous acrylic emulsion VSM6299W/42WA, 3005 parts of film-forming additive OE, 8100.3 parts of defoaming agent Tego, 10.4 parts of base material wetting agent Coatosilk 1214, 2 parts of slow drying additive BYK-AQ, 950.1 parts of pH regulator AMP-950.1 parts, 200.2 parts of preservative QK, 710.7 parts of thickening agent XS, 16.5 parts of deionized water I, 265515 parts of aqueous curing agent XP, 401 parts of Bayer Bayhydur, 605 parts of ion and 20 parts of deionized water II.
Sequentially adding a film-forming additive, a defoaming agent, a base material wetting agent, a slow-drying additive, a pH regulator, a preservative, a thickening agent and deionized water into the aqueous acrylic emulsion at a medium dispersion speed of 500-1000rpm, and completing preparation of a main agent after uniform dispersion; and adding a water-based curing agent and deionized water II before coating construction, stirring uniformly without particles, filtering, and using within 3 hours.
According to GB/T23999-2009 indoor decoration and finishing water-based woodware coating detection coating: hardness: h, gloss (60 °): 94.6, normal temperature water resistance: no abnormality in 24h, boiling water resistance: no abnormality in 15min, alcohol resistance (50%): no abnormality for 1h, and is alkali-resistant (50g/L, NaHCO)3): no abnormality in 1h, vinegar resistance: 1h, no abnormity, green tea resistance: 1h has no abnormality.
And (3) spraying test: under the conditions of the temperature of 28 ℃ and the relative humidity of 60 percent, the wet film thickness is 200 mu m, and the dried film is smooth and has no miliaria, needle holes, dark bubbles and the like.
Example 2
A mirror-effect double-component top-coat paint which is not prone to miliaria when being thickly coated is prepared by weighing the following raw materials in parts by weight: the water-based emulsion paint comprises 247040 parts of water-based emulsion A, 990020 parts of water-based emulsion U, XK-10320 parts of water-based emulsion XK, 2 parts of film-forming aid DPNB, 3003 parts of film-forming aid OE, 0250.4 parts of defoaming agent BYK, 2700.4 parts of substrate wetting agent Tego Wet, 2 parts of slow drying aid BYK-WS, AMP-950.2 parts of pH regulator AMP-551S, 0.2 part of preservative 551S, 20201 parts of thickening agent RM-20201, 10.8 parts of deionized water, 265518 parts of water-based curing agent XP and 20 parts of deionized water.
Firstly adding three aqueous emulsions at a medium dispersion speed of 500-1000rpm, then sequentially adding a film-forming auxiliary agent, a defoaming agent, a base material wetting agent, a slow drying auxiliary agent, a pH regulator, a preservative, a thickening agent and deionized water into the aqueous emulsions, and after the aqueous emulsions are uniformly dispersed, finishing the preparation of a main agent; and adding a water-based curing agent and deionized water II before coating construction, uniformly stirring without particles, and filtering for use within 3 hours.
According to GB/T23999-2009 indoor decoration and finishing water-based woodware coating detection coating: hardness: h, gloss (60 °): 92.8, normal temperature water resistance: no abnormality in 24h, boiling water resistance: no abnormality in 15min, alcohol resistance (50%): no abnormality for 1h, and is alkali-resistant (50g/L, NaHCO)3): no abnormality in 1h, vinegar resistance: 1h, no abnormity, green tea resistance: 1h has no abnormality.
And (3) spraying test: under the conditions of the temperature of 28 ℃ and the relative humidity of 60 percent, the wet film thickness is 250 mu m, and the dried film is smooth and has no miliaria, needle holes, dark bubbles and the like.
Example 3
A mirror-effect double-component top-coat paint which is not prone to miliaria when being thickly coated is prepared by weighing the following raw materials in parts by weight: MT-51060 parts of water-based emulsion, UH 2593/125 parts of water-based emulsion, 4 parts of film-forming aid DPNB, 3001 parts of film-forming aid OE, 0250.4 parts of defoamer BYK, 10.4 parts of base material wetting agent Coatosil 12110.4 parts of slow drying aid BYK-AQ, 270.2 parts of pH regulator CH, 3420.2 parts of preservative Rocima, RM-20200.8 parts of thickener, first 6 parts of deionized water, XP 265510 parts of water-based curing agent, Bayer Bayhydur 401-6010 parts of water-based curing agent and second 25 parts of deionized water.
Firstly adding two aqueous emulsions at a medium dispersion speed of 500-1000rpm, then sequentially adding a film-forming aid, a defoaming agent, a base material wetting agent, a slow drying aid, a pH regulator, a preservative, a thickening agent and deionized water into the aqueous emulsions, and after the aqueous emulsions are uniformly dispersed, finishing the preparation of a main agent; and adding a water-based curing agent and deionized water II before coating construction, uniformly stirring without particles, and filtering for use within 3 hours.
According to GB/T23999-2009 indoor decoration and finishing water-based woodware coating detection coating: hardness: h, gloss (60 °): 95.2, normal temperature water resistance: no abnormality in 24h, boiling water resistance: no abnormality in 15min, alcohol resistance (50%): no abnormality for 1h, and is alkali-resistant (50g/L, NaHCO)3): no abnormality in 1h, vinegar resistance: 1h, no abnormity, green tea resistance: 1h has no abnormality.
And (3) spraying test: under the conditions of the temperature of 28 ℃ and the relative humidity of 60 percent, the wet film thickness is 250 mu m, and the dried film is smooth and has no miliaria, needle holes, dark bubbles and the like.
Example 4
A mirror-effect double-component top-coat paint which is not prone to miliaria when being thickly coated is prepared by weighing the following raw materials in parts by weight: the water-based emulsion paint comprises 247030 parts of water-based emulsion A, U XP 276645 parts of water-based emulsion, 3002 parts of film-forming assistant OE, 8100.2 parts of defoaming agent Tego, 0280.3 parts of defoaming agent BYK, 3460.2 parts of base material wetting agent BYK-AQ, 1 part of slow drying assistant BYK-AQ, 270.1 parts of pH regulator CH, 3000.1 parts of preservative LX, 0.1 part of preservative 551S, 710.5 parts of thickener XS, 20.5 parts of deionized water I, 60020 parts of water-based curing agent XL, and 25 parts of deionized water II.
Firstly adding two aqueous emulsions at a medium dispersion speed of 500-1000rpm, then sequentially adding a film-forming aid, a defoaming agent, a base material wetting agent, a slow drying aid, a pH regulator, a preservative, a thickening agent and deionized water into the aqueous emulsions, and after the aqueous emulsions are uniformly dispersed, finishing the preparation of a main agent; and adding a water-based curing agent and deionized water II before coating construction, uniformly stirring without particles, and filtering for use within 3 hours.
According to GB/T23999-2009 indoor decoration and finishing water-based woodware coating detection coating: hardness: h, gloss (60 °): 96.5, normal temperature water resistance: no abnormality in 24h, boiling water resistance: no abnormality in 15min, alcohol resistance (50%): no abnormality for 1h, and is alkali-resistant (50g/L, NaHCO)3): no abnormality in 1h, vinegar resistance: 1h, no abnormity, green tea resistance: 1h has no abnormality.
And (3) spraying test: under the conditions of the temperature of 28 ℃ and the relative humidity of 60 percent, the wet film thickness is 250 mu m, and the dried film is smooth and has no miliaria, needle holes, dark bubbles and the like.
Example 5
A mirror-effect double-component top-coat paint which is not prone to miliaria when being thickly coated is prepared by weighing the following raw materials in parts by weight: 265160 parts of aqueous emulsion A, E-12930 parts of aqueous emulsion, 2 parts of film-forming assistant DPNB, 3003 parts of film-forming assistant OE, 8100.2 parts of defoamer Tego8178, 0280.2 parts of defoamer BYK, 3460.4 parts of base material wetting agent BYK, 1 part of slow drying assistant BYK-AQ, 270.1 parts of pH regulator CH, LX 3000.1 parts of preservative, 0.1 part of preservative 551S, RM-20200.6 parts of thickener Rhelolete 2990.1 parts of deionized water I2.2 parts of aqueous curing agent Aquuolin 26810 parts, Bayer Bayhydur 401-6010 parts of aqueous curing agent and deionized water II 25 parts.
Firstly adding two aqueous emulsions at a medium dispersion speed of 500-1000rpm, then sequentially adding a film-forming aid, a defoaming agent, a base material wetting agent, a slow drying aid, a pH regulator, a preservative, a thickening agent and deionized water into the aqueous emulsions, and after the aqueous emulsions are uniformly dispersed, finishing the preparation of a main agent; and adding a water-based curing agent and deionized water II before coating construction, uniformly stirring without particles, and filtering for use within 3 hours.
According to GB/T23999-2009 indoor decoration and finishing water-based woodware coating detection coating: hardness: h, gloss (60 °): 95.6, normal temperature water resistance: no abnormality in 24h, boiling water resistance: no abnormality in 15min, alcohol resistance (50%): no abnormality for 1h, and is alkali-resistant (50g/L, NaHCO)3): no abnormality in 1h, vinegar resistance: 1h, no abnormity, green tea resistance: 1h has no abnormality.
And (3) spraying test: under the conditions of the temperature of 28 ℃ and the relative humidity of 60 percent, the wet film thickness is 250 mu m, and the dried film is smooth and has no miliaria, needle holes, dark bubbles and the like.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The double-component high-gloss varnish capable of being thickly coated and preventing miliaria is characterized by comprising a main agent, a water-based curing agent and water, wherein the main agent comprises the following raw materials in parts by weight:
75-90 parts of water-based emulsion,
2-10 parts of a film-forming auxiliary agent,
0.1 to 1 portion of defoaming agent,
0.2 to 1 portion of base material wetting agent,
1-2 parts of a slow drying auxiliary agent,
0.1 to 1 portion of pH regulator,
0.2 to 0.4 portion of preservative,
0.2 to 3 portions of thickening agent,
2.2-20.5 parts of deionized water;
the weight ratio of the main agent to the water-based curing agent to water in the clear finish paint is 100: 15-20: 15-25;
the aqueous emulsion is two or more of A2470, A2651, U XP2766, MT-510, VSM6299W/42WA, 2042, 6516, STW168, AC2598, 938T, 6810, XK-103, WE-6173, U9900, UH2593/1, E-129, 3AH 50W;
the film-forming auxiliary agent is one or more of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, dipropylene glycol butyl ether, propylene glycol, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol butyl ether, propylene glycol phenyl ether, diisobutyl diformate and OE 300;
the defoaming agent is one or more of Tego901W, Tego810, Tego902W, BYK025 and BYK 028;
the substrate wetting agent is one or more of Coatosil1211, Tego Wet KL 245, Tego Wet270 and BYK-346;
the slow drying auxiliary agent is one of BYK-AQ or BYK-WS;
the pH regulator is one or more of AMP-95, CH27 and sodium bicarbonate;
the preservative is one or more of QK20, LX300 and 551S, Rocima 342;
the thickener is one or more of RM-8W, PUR60, PUR69, RM-2020, XS71 and Rheolate 299;
the waterborne curing agent is one or more of Aquolin 268, XP 2655, Bayer Bayhydur 401-60, XL 600 and X EZ-D803.
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| CN115678410B (en) * | 2022-11-25 | 2023-12-19 | 广东巴德士新材料有限公司 | Water-based bi-component clear finish paint and preparation method and application thereof |
| CN115926600B (en) * | 2023-01-06 | 2023-11-10 | 江苏德威涂料有限公司 | Water-based polyurethane coating and preparation method thereof |
| CN116285527A (en) * | 2023-02-21 | 2023-06-23 | 广东华楠树环保涂料有限公司 | Double-component water paint based on bio-based material and preparation method thereof |
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| JP3572344B2 (en) * | 2000-08-11 | 2004-09-29 | 日華化学株式会社 | Two-part aqueous resin composition and coating agent containing the composition |
| CN102220059B (en) * | 2011-06-10 | 2013-11-13 | 时锋林 | Aqueous finishing coat |
| CN106147566B (en) * | 2015-04-28 | 2019-08-06 | 立邦涂料（中国）有限公司 | A kind of special type terrace aqueous polyurethane sub-light varnish product and its preparation method and application |
| CN106800874A (en) * | 2016-12-12 | 2017-06-06 | 河北晨阳工贸集团有限公司 | A kind of aqueous two-component polyurethane finish paint and preparation method thereof |
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Effective date of registration: 20210714 Address after: 230601 200 meters west of the intersection of Fanhua Avenue and Bagongshan Road, Feixi Economic Development Zone, Hefei City, Anhui Province Patentee after: HEFEI SCISKY TECHNOLOGY Co.,Ltd. Address before: 730000 Ketian water science and Technology Industrial Park, 3949 Kunlun Mountain Avenue, Lanzhou New District, Lanzhou City, Gansu Province Patentee before: LANZHOU KETIAN ENVIRONMENTAL PROTECTION ENERGY SAVING SCIENCE & TECHNOLOGY Co.,Ltd. |