A bio-based aromatic multifunctional waterproof coating and a preparation method thereof

Abstract

The application provides a kind of bio-based aromatic multifunctional waterproof coating and preparation method thereof, it is related to novel functional coating technical field, including bio-based film forming material 30-50 parts, functional filler 15-30 parts, aromatic agent 5-10 parts, auxiliary agent 5-10 parts, bio-based film forming material is the blend of vegetable oil emulsion and bio-based polyurethane dispersion, functional aromatic agent is volatile slow-release microcapsule, auxiliary agent is bio-based bio-based thickening agent, defoaming agent, the application can solve the problem of traditional petroleum-based polymer waterproof coating after waste, pollution environment, single function.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new functional coatings, and particularly relates to a bio-based aromatic multifunctional waterproof coating and a preparation method thereof. BACKGROUND

[0002] Traditional waterproof coatings mostly use petroleum-based polymer materials (such as polyurethane, acrylic resin, etc.), which have the following defects: the raw materials are not renewable, the production process has high carbon emissions, some solvents contain VOCs (volatile organic compounds), pollute the environment, have single functions, only have waterproof performance, lack additional values such as odor regulation, are difficult to degrade after being discarded, and do not meet the requirements of sustainable development.

[0003] At present, there is no report on a composite coating that has biodegradability, long-acting fragrance release and excellent waterproof performance. Therefore, the application provides a bio-based aromatic multifunctional waterproof coating and a preparation method thereof. SUMMARY

[0004] In order to overcome the problems in the background art, the application develops a bio-based aromatic multifunctional waterproof coating and a preparation method thereof, and solves the problems of being difficult to degrade after being discarded, polluting the environment and having single functions of traditional petroleum-based polymer waterproof coatings.

[0005] To achieve the above-mentioned purposes, the application is implemented by the following technical solutions:

[0006] A bio-based aromatic multifunctional waterproof coating comprises the following components by mass:

[0007] 30-50 parts of bio-based film-forming substances;

[0008] 15-30 parts of functional fillers;

[0009] 5-10 parts of fragrances;

[0010] 5-10 parts of auxiliaries.

[0011] Further, the bio-based film-forming substances are a blend of vegetable oil emulsion and bio-based polyurethane dispersion; the vegetable oil emulsion is soybean oil or flaxseed oil, and the bio-based polyurethane dispersion is synthesized from plant diol and isocyanate.

[0012] Further, the functional fillers are nanometer titanium dioxide, graphene and bamboo charcoal powder.

[0013] Further, the fragrances are volatile slow-release microcapsules.

[0014] Further, the auxiliaries are bio-based thickening agents and bio-based defoaming agents.

[0015] A preparation method of a bio-based aromatic multifunctional waterproof coating, comprising the following steps:

[0016] S1, the formula amount of plant oil emulsion and bio-based polyurethane dispersion are weighed and blended, a defoaming agent is added, stirring is uniformly carried out, the rotating speed is 500-800 rpm, and the temperature is 40-50 DEG C;

[0017] S2, the formula amount of nano titanium dioxide, graphene, bamboo charcoal powder is added in the bio-based film forming material stirred uniformly in S1 in sequence, and high-speed dispersion is carried out for 20-30 minutes, and the rotating speed is 1200-1500 rpm;

[0018] S3, the formula amount of aromatic microcapsule and bio-based thickening agent is added in the blend of S2, low-speed stirring is carried out, the rotating speed is 200-300 rpm, and the time is 10 minutes, so that the microcapsule structure is avoided from being damaged;

[0019] S4, the blend prepared in S3 is filtered and packaged.

[0020] The beneficial effects of the application are as follows:

[0021] 1. Environmental protection: 100% bio-based raw materials, low VOC content;

[0022] 2. Multifunctional integration: waterproof, long-lasting fragrance performance, and antibacterial;

[0023] 3. Low cost: agricultural by-products such as rapeseed oil residue are used to extract oil, and the raw material cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the bio-based aromatic multifunctional waterproof coating sample preparation flow chart of the application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and beneficial effects of the application more clear, the preferred embodiments of the application will be described in detail below with reference to the drawings, so as to facilitate the understanding of the skilled in the art.

[0026] Example 1

[0027] S1, 30 parts of plant oil emulsion and 20 parts of bio-based polyurethane dispersion are weighed and blended, 4 parts of defoaming agent (plant oil modified) are added, stirring is uniformly carried out, the rotating speed is 800 rpm, and the temperature is 50 DEG C;

[0028] S2, the formula amount of 4 parts of nano titanium dioxide, 1 part of graphene, 25 parts of bamboo charcoal powder is added in the bio-based film forming material stirred uniformly in S1 in sequence, and high-speed dispersion is carried out for 30 minutes, and the rotating speed is 1500 rpm;

[0029] S3, 10 parts of fragrance microcapsules and 2 parts of bio-based thickening agent (cellulose ether) were added to the blend of S2, low-speed stirring, 300 rpm, 10 minutes, to avoid destroying the microcapsule structure;

[0030] S4, the blend prepared in S3 was filtered and packaged.

[0031] Example 2

[0032] S1, 20 parts of vegetable oil emulsion and 10 parts of bio-based polyurethane dispersion were blended, 2 parts of defoaming agent (modified vegetable oil) were added, and stirring was uniform, the speed was 500 rpm, and the temperature was 40°C;

[0033] S2, 2 parts of nano titanium dioxide, 0.5 parts of graphene, and 12.5 parts of bamboo charcoal powder were sequentially added to the bio-based film-forming material stirred uniformly in S1, and high-speed dispersion was performed for 20 minutes at a speed of 1200 rpm;

[0034] S3, 5 parts of fragrance microcapsules and 1 part of bio-based thickening agent (cellulose ether) were added to the blend of S2, low-speed stirring, 200 rpm, 10 minutes, to avoid destroying the microcapsule structure;

[0035] S4, the blend prepared in S3 was filtered and packaged.

[0036] Example 3

[0037] S1, 25 parts of vegetable oil emulsion and 15 parts of bio-based polyurethane dispersion were blended, 3.5 parts of defoaming agent (modified vegetable oil) were added, and stirring was uniform, the speed was 600 rpm, and the temperature was 45°C;

[0038] S2, 3 parts of nano titanium dioxide, 0.7 parts of graphene, and 16.3 parts of bamboo charcoal powder were sequentially added to the bio-based film-forming material stirred uniformly in S1, and high-speed dispersion was performed for 25 minutes at a speed of 1300 rpm;

[0039] S3, 8 parts of fragrance microcapsules and 1.5 parts of bio-based thickening agent (cellulose ether) were added to the blend of S2, low-speed stirring, 250 rpm, 10 minutes, to avoid destroying the microcapsule structure;

[0040] S4, the blend prepared in S3 was filtered and packaged.

[0041] The product of Example 1 was selected as a sample, and 3 groups of comparative examples were set up for testing, and the parameters of the 3 groups of comparative examples are shown in Table 1:

[0042] Table 1 Comparative Example Parameter Table

[0043]

[0044] Table 2 Product raw material table

[0045]

[0046] The samples of Example 1 and Comparative Examples 1-3 were subjected to performance testing, and the testing methods were as follows:

[0047] (1) The surface dry time and the real dry time were tested according to Chapter 16 of GB / T 16777-2008. The wet film thickness was (0.5±0.1) mm. The surface dry time was not more than 2 h, accurate to 0.5 h, and the surface dry time greater than 2 h was accurate to 1 h; the real dry time was not more than 2 h, accurate to 0.5 h, and the real dry time greater than 2 h was accurate to 1 h.

[0048] (2) The water impermeability was tested according to Chapter 15 of GB / T 16777-2008.

[0049] (3) The tensile properties were tested according to 9.2.1 of GB / T 16777-2008.

[0050] (4) The low-temperature bending performance was tested according to Chapter 14 of GB / T 16777-2008.

[0051] (5) The water absorption was tested according to the mass change in JC / T 2663-2022, and the soaking time was (168±1) h.

[0052] (6) The water impermeability was tested according to Chapter 15 of GB / T 16777-2008.

[0053] (7) The mechanical properties testing and sample preparation method of tensile strength, elongation at break, and tear strength were as follows:

[0054] a) Coating film preparation and curing: coating film preparation was carried out according to the provisions of GB / T 16777-2008 4.2.2, and coating film curing was carried out according to the water-based polymer, and the final coating film thickness should reach (1.5±0.2) mm;

[0055] b) The tensile performance test piece should meet the dumbbell 1 type specified in GB / T 528, and the tear strength test piece should meet the straight angle type without cutting edge specified in GB / T 529-2008;

[0056] c) The tensile speed of the tensile testing machine was (200±20) mm / min, and the tensile speed of the tensile testing machine was (200±20) mm / min when testing the tear strength.

[0057] (8) Volatile organic compounds were tested according to 5.2 of GB / T 41078-2021.

[0058] (9) The heat shrinkage was tested according to the provisions of Appendix C in GB 18173.1.

[0059] Table 3 Performance parameter test table

[0060]

[0061] (10) Degradation test

[0062] Purpose of the experiment: To evaluate the biodegradation rate of the paint sample after aging for different service life, at a specific time point (1, 2, 5, 10, 15 years after aging), to evaluate whether the paint meets the expected service life standard, and to show good biodegradation properties when it exceeds the standard range.

[0063] I. Accelerated aging experiment

[0064] 1. Sample preparation:

[0065] Prepare the paint sample according to the method of Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 4.

[0066] Uniformly coat the paint on the coating film mold, with a coating film thickness of 1.5 mm.

[0067] Prepare ten groups of 1, 2, 5, 10, and 15-year-old samples, and set up a control group (0 years) without aging.

[0068] 2. Accelerated aging

[0069] Since it is not practical to simulate 10-15 years of natural aging, the recognized accelerated aging test method is used. It is to simulate the effect of long-term natural exposure in a short period of time by intensifying the aging conditions (such as light intensity, temperature, humidity, etc.).

[0070] Reference standards:

[0071] GB / T 1865-2009 Paints and varnishes Artificial weathering and artificial radiation exposure (filtered xenon arc radiation);

[0072] GB / T 16422.2-2014 Plastics Laboratory light source exposure test methods Part 2: Xenon arc lamp;

[0073] GB / T 16422.3-2014 Plastics Laboratory light source exposure test methods Part 3: Fluorescent ultraviolet lamp;

[0074] Estimation of accelerated aging time for different years: The paint is subjected to accelerated aging together with reference materials with known aging behavior, and the time for the reference materials to reach a certain degree of aging is indirectly inferred.

[0075] II. Biodegradation test

[0076] The paint samples after accelerated aging for different simulated years (0, 1, 2, 5, 10, 15 years) in the first part were tested with reference to the standard: GB / T 19811-2005 "Determination of the ultimate aerobic biodegradability of plastic under controlled composting conditions - Method by measuring the released carbon dioxide".

[0077] Table 4. Degradation test table

[0078]

[0079] The data is shown in Tables 3 and 4. Compared with traditional acrylic waterproof coatings, both the soybean oil emulsion and the linseed oil emulsion have better mold resistance grade and lower VOC content, and can meet the standard JC / T 864-2023 "Polymer emulsion building waterproof coating". After comparing the soybean oil emulsion product with the linseed oil emulsion product, the tensile properties of the product made of soybean oil emulsion are higher than those of the product made of linseed oil emulsion. After reaching the service life, the product starts to degrade, and the disintegration rate reaches 92%. The data shows that the combination of bio-based materials, nano functional materials and microcapsules can greatly improve the fragrance retention time compared with ordinary products directly added with spices, and can realize differentiated innovation and meet the trend of green buildings and healthy homes.

[0080] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A bio-based aromatic multifunctional waterproof coating, characterized in that, Includes the following mass components: 30-50 parts of bio-based film-forming material; 15-30 parts of functional filler; 5-10 parts of fragrance; 5-10 parts of auxiliary agent; The bio-based film-forming substance is a blend of plant oil emulsion and bio-based polyurethane dispersion; the functional filler is nano-titanium dioxide, graphene, and bamboo charcoal powder; the fragrance is a volatile sustained-release microcapsule; and the additives are bio-based thickeners and defoamers. The bio-based aromatic multifunctional waterproof coating is prepared by a method including the following steps: S1. Weigh out the formulated amounts of vegetable oil emulsion and bio-based polyurethane dispersion and blend them together. Add defoamer, stir evenly, at a speed of 500-800 rpm and a temperature of 40-50℃. S2. Add the formulated amounts of nano-titanium dioxide, graphene, and bamboo charcoal powder sequentially to the bio-based film-forming material that has been stirred evenly in S1, and disperse at high speed for 20-30 minutes at a speed of 1200-1500 rpm. S3. Add the formulated amount of fragrance microcapsules and bio-based thickener to the blend from S2, and stir at low speed (200-300 rpm) for 10 minutes to avoid damaging the microcapsule structure. S4. After filtering, the blend prepared in S3 is packaged.

Images