A kind of water-based polymer color essence and its preparation method and application

Abstract

The present invention relates to the technical field of color essences, and in particular to a water-based polymer color essence and its preparation method and application. According to mass percentage, the preparation raw materials include: 20%-25% epoxy resin, 5%-9% compound containing chain reaction termination group, 10%-20% acrylic monomer, 10%-18% amine catalyst, 10%-20% toner, and deionized water to make up the balance; the compound containing chain reaction termination group includes at least one of propylene carbonate, liquid formaldehyde, and dimethyl carbonate. In the present invention, a compound containing a chain reaction termination group is introduced, and the mass ratio of epoxy resin to the compound containing a chain reaction termination group is controlled to be (20-25): (6-9), which can control the degree of reaction, prevent epoxy resin and acrylic monomer from forming a three-dimensional network structure, make the coating have better flexibility and processability after curing, and improve the stability of the water-based polymer color essence.

Description

Technical Field

[0001] The invention relates to the technical field of color essences, and in particular to a water-based polymer color essence and a preparation method and application thereof. Background Art

[0002] In recent years, as the trend of reducing volatile organic compound (VOC) emissions has intensified, many paint manufacturers have responded positively and transformed their resins into water-soluble ones. However, this transformation has caused traditional metal complex dyes and solvent-based color concentrates to no longer be compatible with water-based paints. Although the use of water-soluble dyes can solve the compatibility problem to a certain extent, their key properties such as dispersibility, acid and alkali resistance, and high temperature resistance are inferior to metal complex dyes. In view of this, the paint industry urgently needs to develop a universal color concentrate that is compatible with both water-based and oil-based paints to meet the current challenges.

[0003] Chinese patent application CN113956680A provides a deodorizing water-oil universal color concentrate and a preparation method thereof, comprising the following components: 15-30 parts of metal complex dyes, 15-35 parts of emulsifiers, 4-10 parts of moisturizers, 5-10 parts of cosolvents, 30-40 parts of deodorizing organic solvents, and 0-10 parts of deionized water. The prepared color concentrate can reduce dust pollution, has the advantages of improving hydrophilicity, reducing VOC emissions, and removing odors. However, the color concentrate prepared by the above technology has the problem of poor stability in actual use. Summary of the invention

[0004] In order to solve the problems in the prior art, the first aspect of the present invention provides a water-based polymer color concentrate. The preparation raw materials include, by mass percentage: 20%-25% epoxy resin, 5%-9% compound containing chain reaction terminating group, 10%-20% acrylic monomer, 10%-18% amine catalyst, 10%-20% color powder, and deionized water to make up the balance; the compound containing chain reaction terminating group includes at least one of propylene carbonate, liquid formaldehyde, and dimethyl carbonate.

[0005] In one embodiment, the epoxy resin includes at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, and epoxy diluent.

[0006] In one embodiment, the epoxy value of the epoxy resin is 0.12-0.65 eq / 100 g.

[0007] In a preferred embodiment, the epoxy value of the epoxy resin is 0.12-0.54 eq / 100 g, which can be 0.12 eq / 100 g, 0.2 eq / 100 g, 0.3 eq / 100 g, 0.4 eq / 100 g, 0.5 eq / 100 g, or 0.58 eq / 100 g.

[0008] In one embodiment, the mass ratio of the epoxy resin to the compound containing a chain reaction terminating group is (20-23): (6-9), which can be exemplified as 20:6, 20:8, 20:9, 21:6, 21:8, 22:7, 22:8, 22:9, 23:6, 23:8, 23:9.

[0009] The applicant has found through creative research that the introduction of a compound containing a chain reaction terminating group into the reaction system, and when the compound containing a chain reaction terminating group is at least one of propylene carbonate, liquid formaldehyde, and dimethyl carbonate, can significantly improve the flexibility of the coating, especially when the mass ratio of the epoxy resin to the compound containing a chain reaction terminating group is controlled to be (20-25): (6-9), the prepared water-based polymer color essence has better stability. The possible reason is that when the mass ratio of the epoxy resin to the compound containing a chain reaction terminating group is controlled within a suitable range, the tendency of the epoxy resin to be excessively cross-linked can be prevented, resulting in an increase in viscosity, and even gelation and stratification.

[0010] In one embodiment, the acrylic monomer includes one or more of acrylic acid, methacrylic acid, ethyl acrylate, and hydroxyethyl methacrylate.

[0011] In one embodiment, the amine catalyst includes one or more of trimethylamine, methyldiethanolamine, and dimethylethanolamine.

[0012] In one embodiment, the color powder includes one or more of metal complex dyes, reactive salt-free dyes, and cationic dyes.

[0013] The second aspect of the present invention provides a method for preparing an aqueous polymer color concentrate, comprising at least the following steps: Mix epoxy resin, a compound containing a chain reaction termination group, acrylic monomer, an amine catalyst, color powder and deionized water, heat to 60-100° C., and stir for 6-12 hours; cool to room temperature, and filter to obtain the product.

[0014] A third aspect of the present invention provides an application of a water-based polymer color concentrate in coatings.

[0015] Beneficial Effects 1. The present invention introduces a compound containing a chain reaction terminating group, and controls the mass ratio of the epoxy resin to the compound containing a chain reaction terminating group to be (20-25): (6-9), so as to control the degree of reaction, so that the coating has better flexibility and processability after curing, and at the same time improves the stability of the water-based polymer color concentrate.

[0016] 2. The amount of acrylic monomer in the control system of the present invention is 10%-20wt%, which effectively improves the stability and solubility while ensuring the viscosity of the epoxy resin, and further improves the comprehensive performance of the water-based polymer color essence.

[0017] 3. The water-based polymer color concentrate prepared by the present invention using specific raw materials can be dissolved in both oily and water-based paints and has good stability.

[0018] 4. The water-based polymer color concentrate provided by the present invention can solve the defect that metal complex dyes and solvent-based color concentrates are not compatible with water-based coatings, thereby increasing their application market and having higher practical value. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The experimental methods in the examples without specifying specific conditions are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used without specifying the manufacturer are all conventional products that can be purchased commercially.

[0020] Example 1 The first aspect of the present embodiment provides a water-based polymer color concentrate, wherein the raw materials for preparation include, by weight percentage: 22% epoxy resin, 8% compound containing chain reaction terminating group, 18% acrylic monomer, 12% amine catalyst, 18% color powder, and the balance made up by deionized water.

[0021] The epoxy resin is bisphenol A epoxy resin.

[0022] The bisphenol A epoxy resin is E51 epoxy resin purchased from Jiangsu Sanmu Chemical Co., Ltd.

[0023] The compound containing a chain reaction terminating group is propylene carbonate.

[0024] The acrylic monomer is acrylic acid.

[0025] The amine catalyst includes triethylamine.

[0026] The toner is a reactive salt-free dye.

[0027] The reactive salt-free dye is Reactive Red 195 produced by Hunan Jinqiao New Materials Technology Co., Ltd.

[0028] A second aspect of the present embodiment provides a method for preparing an aqueous polymer color concentrate, comprising the following steps: Mix epoxy resin, a compound containing a chain reaction terminating group, acrylic monomer, amine catalyst, color powder and deionized water, heat to 85°C, and stir for 6 hours; after cooling to room temperature, filter to obtain the product.

[0029] The third aspect of this embodiment provides an application of a water-based polymer color concentrate in coatings.

[0030] Calculated by weight percentage, the raw materials for preparing the coating include 71% water-based coating, 9% water-based polymer color essence, and 20% deionized water.

[0031] The water-based paint is a water-based epoxy modified paint produced by Zhejiang Zhongke Lide New Materials Co., Ltd.

[0032] The preparation method of the coating is as follows: water-based coating, water-based polymer color concentrate and deionized water are stirred and mixed evenly to obtain the coating.

[0033] The configured coating is produced on the assembly line of Pujiang County Ai Xueer Packaging Materials Co., Ltd. and meets the requirements of the production line.

[0034] Example 2 The first aspect of the present embodiment provides a water-based polymer color concentrate, wherein the raw materials for preparation include, by weight percentage: 20% epoxy resin, 9% compound containing chain reaction terminating group, 16% acrylic monomer, 16% amine catalyst, 15% color powder, and the balance made up by deionized water.

[0035] The epoxy resin is an epoxy diluent.

[0036] The epoxy diluent has a brand name of LS-501A and is purchased from Hubei Green Home Materials Technology Co., Ltd.

[0037] The compound containing a chain reaction terminating group is dimethyl carbonate.

[0038] The acrylic monomer is acrylic acid.

[0039] The amine catalyst includes methyldiethanolamine.

[0040] The toner is a cationic dye.

[0041] The cationic dye is cationic yellow X-5GL, purchased from Hongda Chemical Products Business Department.

[0042] A second aspect of the present embodiment provides a method for preparing an aqueous polymer color concentrate, comprising the following steps: Mix epoxy resin, a compound containing a chain reaction terminating group, acrylic monomer, amine catalyst, color powder and deionized water, heat to 90°C, and stir for 8 hours; after cooling to room temperature, filter to obtain the product.

[0043] The third aspect of this embodiment provides an application of a water-based polymer color concentrate in coatings.

[0044] Calculated by weight percentage, the raw materials for preparing the coating include 77% oily coating, 8% water-based polymer color essence, and 8% alcohol.

[0045] The oily paint is an oily acrylic paint produced by Pujiang County Ai Xueer Packaging Materials Co., Ltd.

[0046] The coating is prepared by stirring and mixing water-based coating, water-based polymer color essence and alcohol evenly.

[0047] The configured coating is produced on the assembly line of Pujiang County Ai Xueer Packaging Materials Co., Ltd. and meets the requirements of the production line.

[0048] Example 3 The first aspect of the present embodiment provides a water-based polymer color concentrate, wherein the raw materials for preparation include, by weight percentage: 23% epoxy resin, 6% compound containing chain reaction terminating group, 19% acrylic monomer, 18% amine catalyst, 10% color powder, and the balance made up by deionized water.

[0049] The epoxy resin is bisphenol A epoxy resin.

[0050] The bisphenol A epoxy resin is E51 epoxy resin purchased from Jiangsu Sanmu Chemical Co., Ltd.

[0051] The propylene carbonate containing a chain reaction terminating group.

[0052] The acrylic monomer is methacrylic acid.

[0053] The amine catalyst includes methyldiethanolamine.

[0054] The toner is a metal complex dye.

[0055] The metal complex dye is solvent yellow 88 toner, purchased from BASF, Germany.

[0056] A second aspect of the present embodiment provides a method for preparing an aqueous polymer color concentrate, comprising the following steps: Mix epoxy resin, a compound containing a chain reaction terminating group, acrylic monomer, amine catalyst, color powder and deionized water, heat to 85°C, and stir for 6 hours; after cooling to room temperature, filter to obtain the product.

[0057] The third aspect of this embodiment provides an application of a water-based polymer color concentrate in coatings.

[0058] Calculated by weight percentage, the raw materials for preparing the coating include 78% oily coating, 15% water-based polymer color essence, and 7% alcohol.

[0059] The oily paint is an oily acrylic paint produced by Pujiang County Ai Xueer Packaging Materials Co., Ltd.

[0060] The coating is prepared by stirring and mixing water-based coating, water-based polymer color essence and alcohol evenly.

[0061] The configured coating is produced on the assembly line of Pujiang County Ai Xueer Packaging Materials Co., Ltd. and meets the requirements of the production line.

[0062] Comparative Example 1 This comparative example provides a color concentrate. The raw materials for its preparation include, by weight percentage, 25% epoxy resin, 3% compound containing chain reaction terminating group, 19% acrylic monomer, 18% amine catalyst, 11% color powder, and the balance made up by deionized water.

[0063] The epoxy resin is bisphenol A epoxy resin.

[0064] The bisphenol A epoxy resin is E51 epoxy resin purchased from Jiangsu Sanmu Chemical Co., Ltd.

[0065] The compound containing a chain reaction terminating group is propylene carbonate.

[0066] The acrylic monomer is acrylic acid.

[0067] The amine catalyst includes triethylamine.

[0068] The toner is a reactive salt-free dye.

[0069] The reactive salt-free dye is Reactive Red 195 produced by Hunan Jinqiao New Materials Technology Co., Ltd.

[0070] The reaction product of this comparative example was cross-linked into an insoluble solid mass, and the reaction failed.

[0071] Comparative Example 2 This comparative example provides a color concentrate. The raw materials for its preparation include, by weight percentage, 14% epoxy resin, 8% compound containing chain reaction terminating group, 18% acrylic monomer, 18% amine catalyst, 14% color powder, and the balance made up by deionized water.

[0072] The epoxy resin is an epoxy diluent.

[0073] The epoxy diluent has a brand name of LS-501A and is purchased from Hubei Green Home Materials Technology Co., Ltd.

[0074] The compound containing a chain reaction terminating group is dimethyl carbonate.

[0075] The acrylic monomer is acrylic acid.

[0076] The amine catalyst includes methyldiethanolamine.

[0077] The toner is a cationic dye.

[0078] The cationic dye is cationic yellow X-5GL, purchased from Hongda Chemical Products Business Department.

[0079] The second aspect of this comparative example provides a method for preparing a color essence, comprising the following steps: Mix epoxy resin, a compound containing a chain reaction terminating group, acrylic monomer, amine catalyst, color powder and deionized water, heat to 85°C, and stir for 6 hours; after cooling to room temperature, filter to obtain the product.

[0080] Performance Testing Stability test: The aqueous polymer color concentrates prepared in Examples 1-3 and Comparative Example 2 were placed in 250 ml PET bottles and placed in a drying oven at 25° C. One year later, the bottles were observed to see if there was any stratification. The test results are shown in Table 1.

[0081] Table 1

Claims

1. A water-based polymer color concentrate, characterized in that: The raw materials for preparation include, by weight percentage, 20%-25% epoxy resin, 5%-9% compound containing chain reaction terminating group, 10%-20% acrylic monomer, 10%-18% amine catalyst, 10%-20% toner, and the balance made up by deionized water; the compound containing chain reaction terminating group includes at least one of propylene carbonate, liquid formaldehyde, and dimethyl carbonate.

2. The aqueous polymer color concentrate according to claim 1, characterized in that: The epoxy resin includes at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, and epoxy diluent.

3. The aqueous polymer color concentrate according to claim 2, characterized in that: The epoxy value of the epoxy resin is 0.12-0.65 eq / 100 g.

4. The aqueous polymer color concentrate according to claim 3, characterized in that: The epoxy value of the epoxy resin is 0.12-0.54 eq / 100 g.

5. The aqueous polymer color concentrate according to claim 1, characterized in that: The mass ratio of the epoxy resin to the compound containing a chain reaction terminating group is (20-25):(6-9).

6. The aqueous polymer color concentrate according to claim 1, characterized in that: The acrylic monomer includes one or more of acrylic acid, methacrylic acid, ethyl acrylate, and hydroxyethyl methacrylate.

7. The aqueous polymer color concentrate according to claim 1, characterized in that: The amine catalyst includes one or more of trimethylamine, methyldiethanolamine, and dimethylethanolamine.

8. The aqueous polymer color concentrate according to claim 1, characterized in that: The color powder includes one or more of metal complex dyes, active salt-free dyes, and cationic dyes.

9. A method for preparing an aqueous polymer color concentrate according to any one of claims 1 to 8, characterized in that: At least the following steps are included: Mix epoxy resin, a compound containing a chain reaction termination group, acrylic monomer, an amine catalyst, color powder and deionized water, heat to 60-100° C., and stir for 6-12 hours; cool to room temperature, and filter to obtain the product.

10. An application of the water-based polymer color concentrate according to any one of claims 1 to 8, characterized in that: Used in coatings.

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