Environment-friendly water-based color paste with zero emission of VOC and SVOC as well as preparation method and application of environment-friendly water-based color paste

Abstract

The invention relates to environment-friendly water-based color paste with zero VOC (volatile organic compound) and zero SVOC (solid volatile organic compound) emission, which comprises the following components in percentage by mass: 2 to 20 weight percent of humectant, 0.5 to 40 weight percent of dispersing agent, 0 to 5 weight percent of wetting agent, 0.1 to 5 weight percent of defoaming agent, 5 to 75 weight percent of pigment, 0.1 to 3 weight percent of mildew-proof bactericide, 0 to 3 weight percent of rheological additive and 5 to 80 weight percent of deionized water, and the sum of the weight percent of the components is 100 weight percent. According to the environment-friendly water-based color paste with zero VOC and zero SVOC emission, the high-boiling-point PEO or PEO / PPO polymer with a specific structure is adopted as the humectant, the wetting agent with the carbon atom number higher than 22 is used, and the prepared water-based color paste is free of VOC and SVOC emission and harmless to the environment and human health. The water-based color paste is excellent in storage stability, free of layering, caking and settling phenomena in the storage process, good in applicability in an automatic color mixer, high in color mixing precision and free of the problems of drying, hardening and nozzle blocking. The invention further discloses a preparation method and application of the environment-friendly water-based color paste with zero VOC and SVOC emission.

Description

Technical Field

[0001] The present invention relates to the field of water-based pigment paste, and in particular to an environmentally friendly water-based paste with zero VOC and zero SVOC emissions suitable for a color mixing machine, as well as a preparation method and application of the paste. Background Art

[0002] As the world pays more and more attention to environmental protection, the control standards for volatile organic compounds (VOCs) in architectural coatings are becoming increasingly stringent. At the same time, international control requirements for semi-volatile organic compounds (SVOCs) are also increasing. SVOCs are organic liquids or solids that evaporate slowly at room temperature and pressure. Although their evaporation rate is slower than that of VOCs, they are difficult to degrade and have strong adsorption properties. They often accumulate in indoor environments and cause lasting harm to human health. To address this issue, the international community has issued a revised version of the ISO 11890-2:2020 standard to standardize the detection method of SVOCs. my country is also optimizing the GB / T 23986-2009 test standard and the GB 18582-2020 limit standard to control SVOCs.

[0003] Although "low SVOC" or even "zero SVOC" latex paints have gradually appeared in the domestic market, the patented technology of water-based colorants used in retail store color matching systems mainly focuses on achieving zero VOC and low VOC emissions. For example, CN113321972A reported a colorant for POS machines with zero VOC emissions; CN111100506A reported a mildew-proof and environmentally friendly water-based colorant for automatic color matching machines that does not contain or substantially contains no VOC; CN105038414A reported a water-based colorant with organic pigments for color matching machines with low VOC content. Usually, moisturizers, such as polyethylene glycol 300 and polyethylene glycol 400, need to be added to the colorant of the color matching machine to prevent the colorant from drying in the inner tank of the color matching machine and clogging the nozzle. Although these moisturizers basically do not introduce VOCs, they usually cause SVOC emissions. In addition, other additives in the formula, such as wetting agents and pH adjusters, will also produce SVOCs, posing a potential threat to human health.

[0004] In view of this, there is an urgent need in this field to develop an environmentally friendly water-based colorant that can achieve both zero VOC and zero SVOC emissions, while meeting increasingly stringent environmental regulations and significantly improving indoor environmental quality to solve the problems existing in the prior art. Summary of the invention

[0005] Based on the above facts, the purpose of the present invention is to provide an environmentally friendly water-based color paste with zero VOC and zero SVOC emissions, which uses a high-boiling point PEO or PEO / PPO polymer with a specific structure as a humectant and a wetting agent with a carbon number greater than 22. The prepared water-based color paste has no VOC and SVOC emissions and is harmless to the environment and human health. The water-based color paste has excellent storage stability, will not stratify, agglomerate or settle during storage, has good applicability in automatic color mixing machines, has high color mixing accuracy, and will not have the problem of drying and nozzle clogging.

[0006] The first aspect of the present invention provides an environmentally friendly water-based color paste with zero VOC and zero SVOC emissions, which comprises, by mass percentage:

[0007]

[0008] The sum of the mass percentages of the above components is 100wt%.

[0009] Moisturizer

[0010] In the present invention, the humectant is a polymer with a specific molecular configuration and molecular weight. In order to achieve the purpose of zero VOC and zero SVOC emissions, the boiling point of the selected humectant must be above 370°C. One way to increase the boiling point of the humectant is to increase the molecular weight of the polymer to increase the van der Waals force between molecules; another way is to increase the number of intramolecular and intermolecular hydrogen bonds by glycerol branching modification.

[0011] In some embodiments of the present invention, the humectant is one or more of a PEO polymer or PEO / PPO copolymer with a molecular weight greater than 600 in a linear configuration, a PEO polymer or PEO / PPO copolymer with a molecular weight greater than 400 in a glycerol branched configuration; preferably, the humectant is one or more of a PEO polymer or PEO / PPO copolymer with a molecular weight greater than 800 in a linear configuration, a PEO polymer or PEO / PPO copolymer with a molecular weight greater than 500 in a glycerol branched configuration. Specifically, the humectant is one or more of the humectants provided by CLARIANT with the model number Polyglykol M 1000 and Polyglykol G 500, and provided by EVONIK with the model number TEGO Humectant 7005.

[0012] In some preferred embodiments of the present invention, the content of the moisturizing agent in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is 5-15 wt % by weight.

[0013] Dispersants

[0014] In the present invention, the dispersant is an aqueous dispersant.

[0015] In some embodiments of the present invention, the dispersant is selected from one or more of styrene / acrylic acid copolymer, acrylic acid / maleic acid copolymer, acrylic acid / methacrylic acid copolymer, butadiene / acrylic acid copolymer, isobutylene / maleic acid copolymer, diisobutylene / maleic acid copolymer, styrene / maleic acid copolymer, and polyethylene glycol monovinyl ether / maleic acid copolymer.

[0016] Specifically, the dispersant is selected from one or more of styrene / acrylic acid copolymers, acrylic acid / maleic acid copolymers, acrylic acid / methacrylic acid copolymers, butadiene / acrylic acid copolymers, isobutylene / maleic acid copolymers, diisobutylene / maleic acid copolymers, styrene / maleic acid copolymers, and polyethylene glycol monovinyl ether / maleic acid copolymers produced by CLARIANT, BYK, EVONIK, etc. More specifically, the dispersant is selected from one or more of the dispersants with the model number of Dispersogen PL30 provided by CLARIANT, the models of DISPERBYK-2013 and DISPERBYK-190 provided by BYK, and the model number of TEGO 760W provided by EVONIK.

[0017] In some preferred embodiments of the present invention, the content of the dispersant in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is 5-30wt% by weight, which may be determined according to the type of pigment.

[0018] Wetting Agents

[0019] In some embodiments of the present invention, the wetting agent is selected from one or more of modified alkoxylates having a carbon number greater than 22, polyether-modified siloxanes, and ethoxylated acetylenic glycols.

[0020] Specifically, the wetting agent is selected from one or more of the wetting agents of model numbers Emulsogen LCN 287 and Emulsogen LCN 407 provided by CLARIANT and model number NOVELUTION LE217K provided by SASOL.

[0021] In some preferred embodiments of the present invention, the content of the wetting agent in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is 0-2wt%, more preferably 1-1.5wt%, calculated by weight percentage.

[0022] Defoaming agent

[0023] In some embodiments of the present invention, the defoaming agent is selected from modified polysiloxane, polymer-based defoaming agent or a combination thereof.

[0024] Specifically, the defoaming agent includes but is not limited to the defoaming agent of model Foamstar SI 2250 provided by BASF.

[0025] In some preferred embodiments of the present invention, the content of the defoaming agent in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is 0.1-1 wt % by weight.

[0026] pigment

[0027] In the present invention, the pigment is a substance that provides color. All substances that can be used for coloring are included in the scope of the pigment. Specifically, the pigment can be divided into two categories: organic pigments and inorganic pigments.

[0028] In some preferred embodiments of the present invention, the organic pigment is selected from one or more of black pigments and color pigments; specifically, the organic pigment is selected from one or more of disazo pigments, disazo condensation pigments, dibenzopyrene dione pigments, anthraquinone pigments, anthraquinone pyrimidine pigments, benzimidazolone pigments, quinacridone pigments, quinophthalone pigments, diketopyrrolopyrrole pigments, dioxazine pigments, indanthrone pigments, isoindoline pigments, isoindolinone pigments, perylene pigments, phthalocyanine pigments, and pyrazolequinazolinone pigments. More specifically, the organic pigment is selected from one or more of the following types of pigments:

[0029] Disazo pigments: CI Pigment Yellow 12, 13, 14, 16, 17, 81, 83, 106, 113, 126, 127, 155, 170, 174, 176 and 188; CI Pigment Orange 16, 34 and 44;

[0030] Disazo condensation pigments: CI Pigment Yellow 93, 95 and 128; CI Pigment Red 144, 166, 214, 220, 221, 242 and 262; CI Pigment Brown 23 and 41;

[0031] Dibenzopyrene dione pigment: CI Pigment Red 168;

[0032] Anthraquinone pigments: CI Pigment Yellow 147 and 199; CI Pigment Red 177;

[0033] Anthraquinone pigment: CI Pigment Yellow 108;

[0034] Benzimidazolone pigments: CI Pigment Yellow 120, 151, 154, 180, 181; CI Pigment Orange 36 and 72; CI Pigment Red 175, 185, 208; CI Pigment Brown 25; CI Pigment Violet 32;

[0035] Quinacridone pigments: CI Pigment Orange 48 and 49; CI Pigment Red 122, 202, 206 and 209; CI Pigment Violet 19;

[0036] Quinophthalone pigment: CI Pigment Yellow 138;

[0037] Diketopyrrolopyrrole pigments: CI Pigment Orange 71, 73 and 81; CI Pigment Red 254, 255, 264, 270 and 272;

[0038] Dioxazine pigment: CI Pigment Violet 23;

[0039] Indanthrone pigments: CI Pigment Blue 60 and 64;

[0040] Isoindoline pigments: CI Pigment Yellow 139 and 185; CI Pigment Orange 61 and 69; CI Pigment Red 260;

[0041] Isoindolinone pigments: CI Pigment Yellow 109, 110 and 173;

[0042] Perylene Pigments: CI Pigment Red 123, 149, 178, 179 and 224; CI Pigment Violet 29; CI Pigment Black 31 and 32;

[0043] Phthalocyanine pigments: CI Pigment Blue 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16; CI Pigment Green 7, 36;

[0044] Pyrazolequinazolinone pigments: CI Pigment Orange 67 and CI Pigment Red 216.

[0045] In some preferred embodiments of the present invention, the inorganic pigment is selected from one or more of coloring pigments and pearlescent pigments, and the coloring pigment can be selected from one or more of black, white, and color coloring pigments; specifically, the inorganic pigment is selected from one or more of the following types of pigments:

[0046] White pigment: titanium dioxide (CI Pigment White 6);

[0047] Black pigments: black iron oxide (CI Pigment Black 11), iron manganese black, spinel black (CI Pigment Black 27); carbon black (CI Pigment Black 7); graphite (CI Pigment Black 10); chromium iron oxide black (P. Brown 29);

[0048] Color pigments: red iron oxide (CI Pigment Red 101); brown iron oxide (CI Pigment Brown 6 and 7); yellow iron oxide (CI Pigment Yellow 42); nickel titanium yellow (CI Pigment Yellow 53; CI Pigment Yellow 157, 158, 159, 160, 161, 162, 163, 164 and 189); spinel phase (CI Pigment Yellow 119); bismuth vanadate (CI Pigment Yellow 184).

[0049] In some preferred embodiments of the present invention, the content of the pigment in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is 10-70wt% by weight, which may be determined according to the type of the pigment.

[0050] Antifungal fungicide

[0051] In some embodiments of the present invention, the mildew-proofing and bactericide is a fungicide, specifically, including but not limited to the type provided by Thor Company. Anti-mold fungicide.

[0052] In some preferred embodiments of the present invention, the content of the mildew-proofing and fungicide in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is 0.1-1 wt % by weight.

[0053] Rheology additives

[0054] In some embodiments of the present invention, the rheological additive is selected from one or more of hectorite clay, fumed silica, and hydroxyethyl cellulose; specifically, it includes but is not limited to the rheological additive model 250HBR provided by Ashland.

[0055] In some preferred embodiments of the present invention, the content of the rheological additive in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is 0-2 wt % by weight.

[0056] The second aspect of the present invention provides a method for preparing the environmentally friendly water-based colorant with zero VOC and zero SVOC emissions according to the first aspect of the present invention, comprising the following steps:

[0057] (1) adding a humectant, a dispersant, a wetting agent, and a defoaming agent according to the formula weight into a portion of deionized water, and stirring at a speed of 800-1000 r / min for 10-20 min to obtain a mixture A;

[0058] (2) adding pigment to mixture A and dispersing at a speed of 1500-2000 r / min for 30 min to obtain mixture B;

[0059] (3) sand-grinding the mixture B, and maintaining the grinding state until the material fineness is dispersed to less than 10 μm, to obtain a mixture C;

[0060] (4) Adding the mildew-proofing and bactericide, the rheological additive and the remaining deionized water to the mixture C, stirring at a speed of 800-1000 r / min for 10 min, the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is obtained.

[0061] It should be noted that the machines and equipment used in the preparation method are all common equipment in paint or pigment paste production factories, which can be applied to industrial large-scale production and have good practicality.

[0062] The third aspect of the present invention provides an application of preparing the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to the first aspect of the present invention, including application in an automatic color mixing machine.

[0063] Beneficial Effects of the Invention

[0064] The present invention aims at the deficiencies in the prior art and provides an environmentally friendly water-based color paste with zero VOC and zero SVOC emissions and a preparation method thereof. The environmentally friendly water-based color paste with zero VOC and zero SVOC emissions uses a high-boiling-point PEO or PEO / PPO polymer with a specific structure as a humectant and a wetting agent with a carbon atom number greater than 22. The prepared water-based color paste has no VOC and SVOC emissions and is harmless to the environment and human health. The water-based color paste has excellent storage stability, will not have stratification, agglomeration and sedimentation during storage, has good applicability in an automatic color mixing machine, has high color mixing accuracy, and will not have the problem of drying and nozzle clogging. DETAILED DESCRIPTION

[0065] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with specific examples. It should be understood by those skilled in the art that the content specifically described below is illustrative and non-restrictive, and should not be used to limit the scope of protection of the present invention. Unless otherwise specified, all parts and percentages mentioned in the specific embodiments are by mass, and the raw materials used are all commercially available.

[0066] Example 1: Environmentally friendly water-based color paste with zero VOC and zero SVOC emissions - iron yellow

[0067] According to the formula shown in Table 1 below, an environmentally friendly water-based colorant - iron yellow with zero VOC and zero SVOC emissions is prepared. The preparation steps include:

[0068] (1) adding 8.0 wt% of moisturizing agent, 5.0 wt% of dispersing agent and 0.3 wt% of defoaming agent to 28.7 wt% of deionized water according to the formula weight, stirring at a speed of 800-1000 r / min for 10-20 min to obtain a mixture A;

[0069] (2) adding 55.0 wt % of pigment to mixture A and dispersing at a speed of 1500-2000 r / min for 30 min to obtain mixture B;

[0070] (3) sand-grinding the mixture B, and maintaining the grinding state until the material fineness is dispersed to less than 10 μm, to obtain a mixture C;

[0071] (4) Add 0.5 wt % of mildew and fungicide, 0.5 wt % of rheological additive and 2.0 wt % of deionized water to the mixture C, and stir at a speed of 800-1000 r / min for 10 min to obtain the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions - iron yellow.

[0072] Table 1 Formulation of Example 1

[0073]

[0074] Example 2: Environmentally friendly water-based color paste with zero VOC and zero SVOC emissions - iron red

[0075] According to the formula shown in Table 2 below, an environmentally friendly water-based colorant - iron red with zero VOC and zero SVOC emissions is prepared. The preparation steps include:

[0076] (1) adding 8.0 wt% of moisturizing agent, 4.0 wt% of dispersing agent and 0.3 wt% of defoaming agent to 19.9 wt% of deionized water according to the formula weight, stirring at a speed of 800-1000 r / min for 10-20 min to obtain a mixture A;

[0077] (2) adding 65.0 wt % of pigment to mixture A and dispersing at a speed of 1500-2000 r / min for 30 min to obtain mixture B;

[0078] (3) sand-grinding the mixture B, and maintaining the grinding state until the material fineness is dispersed to less than 10 μm, to obtain a mixture C;

[0079] (4) Add 0.5 wt % of mildew and fungicide, 0.3 wt % of rheological additive and 2.0 wt % of deionized water to the mixture C, and stir at a speed of 800-1000 r / min for 10 min to obtain the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions - iron red.

[0080] Table 2 Formulation of Example 2

[0081]

[0082] Example 3: Environmentally friendly water-based colorant with zero VOC and zero SVOC emissions - carbon black

[0083] According to the formula shown in Table 3 below, an environmentally friendly water-based colorant-carbon black with zero VOC and zero SVOC emission is prepared, and the preparation steps include:

[0084] (1) adding 10.0 wt% of moisturizing agent, 15.0 wt% of dispersing agent, 1.0 wt% of wetting agent, and 0.5 wt% of defoaming agent to 33.2 wt% of deionized water according to the formula weight, and stirring at a speed of 800-1000 r / min for 10-20 min to obtain a mixture A;

[0085] (2) adding 35.0 wt% of pigment to mixture A and dispersing at a speed of 1500-2000 r / min for 30 min to obtain mixture B;

[0086] (3) sand-grinding the mixture B, and maintaining the grinding state until the material fineness is dispersed to less than 10 μm, to obtain a mixture C;

[0087] (4) Add 0.3 wt % of mildew and fungicide and 5.0 wt % of deionized water to the mixture C, and stir at a speed of 800-1000 r / min for 10 min to obtain the environmentally friendly water-based color paste-carbon black with zero VOC and zero SVOC emissions.

[0088] Table 3 Formulation of Example 3

[0089]

[0090] Example 4: Environmentally friendly water-based color paste with zero VOC and zero SVOC emissions - organic red

[0091] According to the formula shown in Table 4 below, an environmentally friendly water-based colorant with zero VOC and zero SVOC emissions - organic red is prepared, and the preparation steps include:

[0092] (1) adding 8.0 wt% of moisturizing agent, 20.0 wt% of dispersing agent, 1.5 wt% of wetting agent, and 0.4 wt% of defoaming agent to 24.8 wt% of deionized water according to the formula weight, and stirring at a speed of 800-1000 r / min for 10-20 min to obtain a mixture A;

[0093] (2) adding 40.0 wt% of pigment to mixture A and dispersing at a speed of 1500-2000 r / min for 30 min to obtain mixture B;

[0094] (3) sand-grinding the mixture B, and maintaining the grinding state until the material fineness is dispersed to less than 10 μm, to obtain a mixture C;

[0095] (4) Add 0.3 wt % of mildew and fungicide and 5.0 wt % of deionized water to the mixture C, and stir at a speed of 800-1000 r / min for 10 min to obtain the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions - organic red.

[0096] Table 4 Formulation of Example 4

[0097]

[0098]

[0099] Example 5: Environmentally friendly water-based color paste with zero VOC and zero SVOC emissions - organic green

[0100] According to the formula shown in Table 5 below, an environmentally friendly water-based colorant with zero VOC and zero SVOC emission - organic green is prepared, and the preparation steps include:

[0101] (1) adding 6.0 wt% of moisturizing agent, 25.0 wt% of dispersing agent, 1.0 wt% of wetting agent, and 0.5 wt% of defoaming agent to 22.2 wt% of deionized water according to the formula weight, and stirring at a speed of 800-1000 r / min for 10-20 min to obtain a mixture A;

[0102] (2) adding 40.0 wt% of pigment to mixture A and dispersing at a speed of 1500-2000 r / min for 30 min to obtain mixture B;

[0103] (3) sand-grinding the mixture B, and maintaining the grinding state until the material fineness is dispersed to less than 10 μm, to obtain a mixture C;

[0104] (4) Add 0.3 wt % of mildew and fungicide and 5.0 wt % of deionized water to the mixture C, and stir at a speed of 800-1000 r / min for 10 min to obtain the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions - organic green.

[0105] Table 5 Formulation of Example 5

[0106]

[0107] Comparative Example 1: Iron yellow paste 1

[0108] Example 1 was repeated, except that the moisturizer in the formula was replaced with an equal amount of polyethylene glycol 400 with a linear molecular weight of 400, and the other conditions and preparation method remained unchanged to prepare an iron yellow paste 1 as a comparative example.

[0109] Comparative Example 2: Iron yellow paste 2

[0110] Example 1 was repeated, except that the moisturizer in the formula was replaced with an equal amount of propylene glycol, and the other conditions and preparation methods remained unchanged, to prepare an iron yellow paste 2 as a comparative example.

[0111] Comparative Example 3: Carbon black paste 1

[0112] Example 3 was repeated, with the only difference being that the wetting agent in the formula was replaced with an equivalent wetting agent having 7 carbon atoms, and the other conditions and preparation method remained unchanged, to prepare a carbon black slurry 1 as a comparative example.

[0113] Comparative Example 4: Organic red pulp 1

[0114] Example 4 was repeated, except that the wetting agent in the formula was replaced with an equivalent wetting agent having 13 carbon atoms, and other conditions and preparation methods remained unchanged, to prepare an organic red paste 1 as a comparative example.

[0115] Comparative Example 5: Iron yellow paste 3

[0116] Example 1 was repeated, except that the moisturizer in the formula was replaced by an equal amount of water, and the other conditions and preparation methods remained unchanged, to prepare an iron yellow paste 3 as a comparative example.

[0117] Comparative Example 6: Iron red paste 1

[0118] Example 2 was repeated, except that the moisturizer in the formula was replaced by an equal amount of Polyglykol M 500, and the other conditions and preparation methods remained unchanged, to prepare iron red paste 1 as a comparative example.

[0119] For the color pastes obtained in Examples 1-5, Comparative Examples 1-4 and 6, the volatile organic compound content (VOC) and semi-volatile organic compound content (SVOC) were tested according to ISO 11890-2:2020. The test results are shown in Table 6:

[0120] Table 6 VOC and SVOC test results of the color pastes obtained in Examples 1-5, Comparative Examples 1-4 and 6

[0121]

[0122] No detection means: Volatile organic matter (VOC) < 2g / L; Semi-volatile organic matter content (SVOC) < 0.01% From the results in Table 6, it can be seen that the VOC and SVOC of the color pastes obtained in Examples 1-5 were not detected, while the color pastes obtained in Comparative Examples 1-4 and 6 were detected with VOC or SVOC under the same test conditions. This illustrates the necessity of using high-boiling-point PEO or PEO / PPO polymers of a specific structure as humectants and using wetting agents with carbon atoms greater than 22.

[0123] The color pastes obtained in Examples 1-5 and Comparative Example 5 were tested for the dropping accuracy and stability of the color mixing machine. The specific test method is as follows:

[0124] (1) Add the color paste to be tested into the automatic color mixing machine, exhaust according to regulations, and rinse the pipeline with the color paste to be tested;

[0125] (2) Add 0.2 mL of color paste in the color mixing software, use an electronic balance to measure the weight of the color paste discharged from the color mixing machine, and repeat three times to test the accuracy of the addition;

[0126] (3) Repeat step (2) every 30 days to test the stability of the color paste in the color mixing machine.

[0127] The results of the color paste obtained in Examples 1-5 and Comparative Example 5 being tested for the dropping accuracy and stability of the color mixing machine according to the above method are shown in Table 7:

[0128] Table 7 Test results of the dripping accuracy and stability of the color paste color mixing machine obtained in Examples 1-5 and Comparative Example 5

[0129]

[0130] From the results in Table 7, it can be seen that the color pastes obtained in Examples 1-5 have high dripping accuracy and good consistency in the automatic color mixing machine, and still have very excellent color mixing accuracy and consistency after being stored in the color mixing machine for 90 days, while the color paste obtained in Comparative Example 5 has problems of drying and nozzle clogging when stored in the color mixing machine, and has poor color mixing accuracy and poor consistency.

[0131] The specific results of the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions obtained in Examples 1-5 of the present invention after multiple tests are as follows:

[0132] The volatile organic compound content (VOC) and semi-volatile organic compound content (SVOC) were tested by the CNOOC Changzhou Coatings Research Institute Testing Center in accordance with ISO 11890-2:2020, and no relevant items were detected (no detection explanation: volatile organic compound (VOC) <2g / L; semi-volatile organic compound content (SVOC) <0.01%).

[0133] The National Construction Engineering Materials Quality Supervision and Inspection Center conducted tests based on GB24613-2009 "Limits of Hazardous Substances in Toy Coatings", GB / T26125-2011 "Determination of Six Restricted Substances in Electronic and Electrical Products (Lead, Mercury, Cadmium, Hexavalent Chromium, Polybrominated Biphenyls and Polybrominated Diphenyl Ethers)", GB / T30647-2014 "Determination of the Total Content of Hazardous Elements in Coatings", and GB / T31414-2015 "Determination of Alkylphenol Polyoxyethylene Ethers for Water-Based Coatings Surfactants". No relevant items were detected (Explanation for non-detection: 1. According to GB24613-2009, dibutyl phthalate, dibutyl phthalate 1. According to GB / T26125-2011, hexavalent chromium <1mg / kg. 2. According to GB / T30647-2014, lead <4mg / kg, cadmium <2mg / kg, cobalt <2mg / kg, mercury <2mg / kg, antimony <3mg / kg, barium <10mg / kg, arsenic <2mg / kg, selenium <2mg / kg. 3. According to GB / T31414-2015, alkylphenol polyoxyethylene ether <10mg / kg. 4. According to GB / T31414-2015, alkylphenol polyoxyethylene ether <10mg / kg. 5. According to GB / T26125-2011, hexavalent chromium <1mg / kg. 6. According to GB / T30647-2014, lead <4mg / kg, cadmium <2mg / kg, cobalt <2mg / kg, mercury <2mg / kg, antimony <3mg / kg, barium <10mg / kg, arsenic <2mg / kg, selenium <2mg / kg. 7. According to GB / T31414-2015, alkylphenol polyoxyethylene ether <10mg / kg. 8. According to GB / T31414-2015, hexavalent chromium <1mg / kg. 9. According to GB / T31414-2015, hexavalent chromium <1mg / kg. 10. According to GB / T26125-2011, hexavalent chromium <1mg / kg. 11. According to GB / T30647-2014, hexavalent chromium <1mg / kg

[0134] In summary, the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions described in the present invention has no VOC and SVOC emissions, is harmless to the environment and human health, and has excellent storage stability, will not experience stratification, agglomeration and sedimentation during storage, has good applicability in automatic color mixing machines, has high color mixing accuracy, and will not have problems of drying and nozzle clogging.

[0135] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. An environmentally friendly water-based color paste with zero VOC and zero SVOC emissions, comprising, by mass percentage: The sum of the mass percentages of the above components is 100wt%.

2. The environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to claim 1, characterized in that: The humectant is selected from one or more of a PEO polymer or a PEO / PPO copolymer with a molecular weight greater than 600 in a linear configuration, a PEO polymer or a PEO / PPO copolymer with a molecular weight greater than 400 in a glycerol branched configuration; preferably, the humectant is selected from one or more of a PEO polymer or a PEO / PPO copolymer with a molecular weight greater than 800 in a linear configuration, a PEO polymer or a PEO / PPO copolymer with a molecular weight greater than 500 in a glycerol branched configuration.

3. The environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to claim 1 or 2, characterized in that: Calculated by weight percentage, the content of the moisturizing agent in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is preferably 5-15wt%.

4. The environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to claim 1, characterized in that: The dispersant is an aqueous dispersant; preferably, the dispersant is selected from one or more of styrene / acrylic acid copolymer, acrylic acid / maleic acid copolymer, acrylic acid / methacrylic acid copolymer, butadiene / acrylic acid copolymer, isobutylene / maleic acid copolymer, diisobutylene / maleic acid copolymer, styrene / maleic acid copolymer, polyethylene glycol monovinyl ether / maleic acid copolymer; the content of the dispersant in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is preferably 5-30wt% by weight.

5. The environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to claim 1, characterized in that: The wetting agent is selected from one or more of modified alkoxylates having a carbon atom number greater than 22, polyether-modified siloxanes, and ethoxylated acetylenic glycols; the content of the wetting agent in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is preferably 0-2wt%, and more preferably 1-1.5wt%, based on mass percentage.

6. The environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to claim 1, characterized in that: The defoamer is selected from modified polysiloxane, polymer-based defoamer or a combination thereof; the content of the defoamer in the zero-VOC and zero-SVOC emission environmentally friendly water-based color paste is preferably 0.1-1wt% by weight.

7. The environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to claim 1, characterized in that: The pigment is selected from one or more of organic pigments and inorganic pigments; preferably, the organic pigment is selected from one or more of disazo pigments, disazo condensation pigments, dibenzopyrene dione pigments, anthraquinone pigments, anthraquinone pyrimidine pigments, benzimidazolone pigments, quinacridone pigments, quinophthalone pigments, diketopyrrolopyrrole pigments, dioxazine pigments, indanthrone pigments, isoindoline pigments, isoindolinone pigments, perylene pigments, phthalocyanine pigments, and pyrazolequinazolinone pigments, and the inorganic pigment is selected from one or more of coloring pigments and pearlescent pigments; more preferably, the coloring pigment is selected from one or more of black, white, and colorful coloring pigments; the content of the pigment in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is preferably 10-70wt% by weight.

8. The environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to claim 1, characterized in that: The mildew-proofing and bactericide is a fungicide, and the rheological additive is selected from one or more of hectorite clay, fumed silica, and hydroxyethyl cellulose; in terms of mass percentage, the mildew-proofing and bactericide content in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is preferably 0.1-1wt%, and the rheological additive content in the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is preferably 0-2wt%.

9. A method for preparing an environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to any one of claims 1 to 8, comprising the following steps: (1) adding a humectant, a dispersant, a wetting agent, and a defoaming agent according to the formula weight into a portion of deionized water, and stirring at a speed of 800-1000 r / min for 10-20 min to obtain a mixture A; (2) adding pigment to mixture A and dispersing at a speed of 1500-2000 r / min for 30 min to obtain mixture B; (3) sand-grinding the mixture B, and maintaining the grinding state until the material fineness is dispersed to less than 10 μm, to obtain a mixture C; (4) Adding the mildew-proofing and bactericide, the rheological additive and the remaining deionized water to the mixture C, stirring at a speed of 800-1000 r / min for 10 min, the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions is obtained.

10. An application of the environmentally friendly water-based color paste with zero VOC and zero SVOC emissions according to any one of claims 1 to 8, characterized in that: The environmentally friendly water-based color paste with zero VOC and zero SVOC emission is applied to a color mixing machine.

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