Yellowing-resistant waterborne polyurethane mortar terrace and preparation method thereof

Abstract

The invention discloses an anti-yellowing waterborne polyurethane mortar terrace and a preparation method thereof, the waterborne polyurethane mortar terrace is prepared from the following raw materials: a waterborne mortar emulsion, an isocyanate composition, a sand mixture and a catalytic promoter, the catalytic promoter is an alcohol zirconium catalyst with a separate component and tertiary amine, and the tertiary amine is an alcohol zirconium catalyst with tertiary amine. And the components are independently added during construction. The waterborne polyurethane mortar terrace prepared by the invention not only solves the problem that a mortar terrace prepared from an aromatic isocyanate curing agent is easy to yellow, but also solves the problems of serious appearance foaming and high reaction speed when aliphatic isocyanate is added into a waterborne polyurethane mortar system; meanwhile, the problem that the strength is reduced due to addition of aliphatic isocyanate is greatly relieved.

Description

Technical Field

[0001] The invention relates to the field of floor paving materials, and in particular to a yellowing-resistant waterborne polyurethane mortar floor and a preparation method thereof. Background Art

[0002] Waterborne polyurethane mortar flooring has very excellent performance. After curing, the floor has high hardness, impact resistance, friction resistance, and excellent temperature resistance, chemical resistance, cleanliness and heavy load resistance. The system is resistant to high temperature and corrosion, and can be used in food workshops without fear of high-temperature steam cleaning. The reaction between polyurethane and active inorganic materials greatly enhances the wear resistance of the material. Compared with ceramic tiles, it has low maintenance costs and a long life cycle. The system is safe and environmentally friendly, and can meet the regulations of various countries on the basis of meeting the construction scene. The material can be quickly constructed and used, thereby shortening the construction cycle, and the system can be applied to various temperatures and environments. The system has a low solvent content and is environmentally friendly. The system can be used to protect concrete substrates in harsh environments, such as food processing plants, hot stamping workshops, breweries, kimchi factories, laboratories and other places.

[0003] At present, conventional waterborne polyurethane mortar products are mainly composed of aromatic isocyanate curing, such as patent CN115873491 A. This type of solution will cause obvious yellowing after a short period of use, and even powdering after a long period of light exposure. In food factories where this type of floor is most used, floor maintenance will involve problems such as food workshop shutdowns, which greatly affects its use. However, if aliphatic isocyanate is directly used instead of aromatic isocyanate, such as patents CN 110591534 A and CN116102317A, various problems will arise due to the difference in reactivity between aromatic and aliphatic isocyanates, such as aliphatic reactions that are too slow to cause foaming, aliphatic products with high viscosity leading to poor leveling, and aliphatic products with low compressive strength, etc. These problems greatly affect the application of aliphatic yellowing-resistant waterborne polyurethane mortar in actual scenarios.

[0004] Based on this, there is still a need to develop a yellowing-resistant waterborne polyurethane mortar floor and a preparation method thereof to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a yellowing-resistant waterborne polyurethane mortar floor and a preparation method thereof. By using an aliphatic isocyanate composition and a special catalyst for waterborne mortar floor, the problem of easy yellowing of waterborne polyurethane mortar floor materials is solved, and at the same time, the problem of slow reaction, foaming and low strength caused by adding aliphatic isocyanate to waterborne polyurethane mortar products is solved.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A yellowing-resistant water-based polyurethane mortar floor is prepared from the following components in parts by weight:

[0008] (1) 8 to 16 parts of aqueous mortar emulsion, for example, 8, 9, 10, 11, 12, 13, 14, 15, 16 parts;

[0009] (2) 10 to 20 parts of an isocyanate composition, for example, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 parts;

[0010] (3) 60 to 85 parts of the active sand composition, for example 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85 parts;

[0011] (4) Catalyst promoter: 0.00005-0.005 parts, for example, 0.0001, 0.0005, 0.00055, 0.0006, 0.0007, 0.0008, 0.0009, 0.001, 0.0015, 0.002, 0.0025, 0.003, 0.0035, 0.004, 0.0045, 0.005 parts.

[0012] In some specific embodiments, the viscosity of the aqueous mortar emulsion is 50 to 600 mPa·s, for example, 50 mPa·s, 80 mPa·s, 100 mPa·s, 150 mPa·s, 200 mPa·s, 250 mPa·s, 300 mPa·s, 350 mPa·s, 400 mPa·s, 450 mPa·s, 500 mPa·s, 550 mPa·s, 600 mPa·s, etc., preferably 100 to 500 mPa·s;

[0013] Preferably, the aqueous mortar emulsion is an emulsion component dispersed in water, wherein the water content of the aqueous mortar emulsion is 10 to 45 wt%, such as 15 wt%, 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%, 45 wt%, etc., preferably 20 to 40 wt%;

[0014] In a preferred embodiment, the aqueous mortar emulsion component also includes a defoamer, wherein the defoamer is, for example, BYK LP D 23014 of BYK additive, and the amount of the defoamer added is, for example, 8 to 16 parts of the aqueous mortar emulsion and 0.1 to 1 part of the defoamer.

[0015] Specifically, the aqueous mortar emulsion is selected from one or more of SETATHANE-DE-2761WB, SETATHANE-DE-2767, etc.

[0016] In some specific embodiments, the isocyanate composition is an aliphatic isocyanate composition, preferably at least two or more selected from isophorone diisocyanate (IPDI), an adduct of isophorone diisocyanate and trimethylolpropane (IPDI-TMP), and a hexamethylene diisocyanate polymer (HDI polymer), preferably a combination of multiple isocyanates. For example, the isocyanate composition contains 20 to 70 wt %, for example, 30 wt %, 40 wt %, 50 wt %, 60 wt %, 70 wt %, 80 wt %, 90 wt %, 100 wt %, 120 wt %, 130 wt %, 140 wt %, 150 wt %, 160 wt %, 170 wt %, 180 wt %, 190 wt %, 200 wt %, 210 wt %, 220 wt %, 230 wt %, 240 wt %, 250 wt %, 260 wt %, 270 wt %, 280 wt %, 290 wt %, 300 wt %, 310 wt %, 320 wt %, 330 wt %, 340 wt %, 350 wt %, 360 wt %, 370 wt %, 380 Preferably, the isocyanate composition contains 39-49wt% IPDI, such as 40wt%, 45wt%, etc., 39-49wt% IPDI-TMP, such as 40wt%, 45wt%, etc., and 5-15wt% HDI polymer, such as 10wt%. Preferably, the HDI polymer includes HDI trimer, HDI pentamer and HDI polymer, wherein the trimer content is 10-80wt%, such as 20wt%, 30wt%, 40wt%, 50wt%, 60wt%, 70wt%, etc., preferably 10-50%.

[0017] In some specific embodiments, the active sand composition is selected from two or more of cement, slaked lime, mixed quartz sand, and pigment, usually a mixture of several, which is a conventional choice in the art and is not particularly limited in the present invention. Preferably, the particle size of the quartz sand is 50 to 200 mesh, such as 80 mesh, 100 mesh, 150 mesh, 180 mesh, etc., preferably 80 to 150 mesh.

[0018] In some specific embodiments, the catalytic aid is selected from at least any one of zirconium, bismuth, and tin catalysts; for example, selected from one or more of dibutyltin dilaurate (DBTDL), stannous octoate, zirconium acetylacetonate and its chelate, zirconium phosphate, zirconium titanate, bismuth carboxylate, and zirconium alcohol compounds containing tertiary amines; preferably, zirconium and bismuth catalysts are used, such as zirconium acetylacetonate, bismuth carboxylate, etc.

[0019] More preferably, the catalyst promoter is a zirconium alcoholate catalyst having a tertiary amine, preferably 8-hydroxyquinoline zirconium.

[0020] In some specific embodiments, the yellowing-resistant water-based polyurethane mortar floor component of the present invention also includes a certain amount of solvent, and the amount of solvent added accounts for 0 to 40 wt% of the mass of the isocyanate composition, for example, 0, 10 wt%, 20 wt%, 30 wt%, 40 wt%, etc., preferably 5 to 15 we%; preferably, the solvent is selected from one or more of mixed dibasic acid dimethyl ester, propylene glycol methyl ether propionate, ethylene glycol diacetate, propylene glycol diacetate, butyl acetate, xylene, and ethyl acetate.

[0021] In some specific embodiments, the catalytic aid component is added separately during the construction of the floor material.

[0022] In a preferred embodiment, the yellowing-resistant water-based polyurethane mortar floor is prepared from the following components in parts by weight: 8 to 16 parts of water-based mortar emulsion, 0.1 to 1 part of defoamer, 10 to 20 parts of isocyanate composition, 60 to 80 parts of active sand composition, and 0.00005 to 0.005 parts of catalyst.

[0023] In a preferred embodiment, the yellowing-resistant water-based polyurethane mortar floor is prepared from the following components in parts by weight: 8 to 16 parts of water-based mortar emulsion, 0.1 to 1 part of defoamer, 10 to 20 parts of isocyanate composition, 60 to 85 parts of active sand composition, 0.00005 to 0.005 parts of catalyst, and 0 to 8 parts of solvent.

[0024] On the other hand, in the preparation method of the aforementioned yellowing-resistant water-based polyurethane mortar floor, during construction, the water-based mortar emulsion and the isocyanate composition are first stirred evenly, and then the active sand composition and the catalytic aid are added and stirred evenly, and then the floor paving construction is carried out;

[0025] Preferably, the stirring rate of the stirring is 300-800 rpm, for example, 400 rpm, 500 rpm, 600 rpm, 700 rpm, 800 rpm, etc.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention solves the shortcoming of the traditional MDI type waterborne polyurethane mortar floor that it is easy to yellow by combining a specific aliphatic isocyanate composition and a catalyst, and solves the problems of slow reaction, easy foaming and low strength when aliphatic isocyanate is directly added to the system. This improves the decorativeness of the aliphatic yellowing-resistant waterborne polyurethane mortar floor, and it is possible to use it outdoors in commercial places with high decorative requirements in the future, greatly expanding the application scenarios of waterborne polyurethane mortar floors. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below through specific examples to make the purpose, technical solution and advantages of the present invention clearer. Example coating is prepared from raw materials in parts by weight. The present invention can be implemented in various ways, and the implementation methods include but are not limited to the following aspects.

[0029] Main raw materials and sources:

[0030] Water-based mortar emulsion allnex resin SETATHANE-DE-2761;

[0031] Active sand material composition: mass ratio is m(white cement):m(slaked lime):m(quartz sand):m(iron red pigment)=19:5:75:1;

[0032] Defoamer BYK additive BYK LP D 23014;

[0033] IPDI Wanhua Chemical;

[0034] IPDI-TMP Wanhua Chemical;

[0035] HDI trimer Wanhua Chemical;

[0036] 8-Hydroxyquinoline Zirconium Chinese Medicine;

[0037] Zirconium acetylacetonate Aladdin reagent;

[0038] Bismuth carboxylate Aladdin reagent;

[0039] Dibutyltin dilaurate Aladdin reagent.

[0040] Example 1

[0041] (1) In the aqueous emulsion, SETATHANE-DE-2761 accounts for 11.5 parts and the defoamer YK LP D 23014 accounts for 0.5 parts;

[0042] (2) an isocyanate composition, comprising 6.4 parts of IDPI, 6.4 parts of IPDI-TMP, 1.6 parts of HDI trimer, and 1.6 parts of mixed dibasic acid dimethyl ester;

[0043] (3) active sand composition accounts for 72 parts;

[0044] (4) Catalytic component: 0.002 parts of 8-hydroxyquinoline zirconium.

[0045] First, mix the above components (1) and (2) evenly, then add components (3) and (4) and stir them with a disperser at a speed of 500 rpm, and use a scraper to apply it on the cement surface, numbered A.

[0046] Example 2

[0047] (1) SETATHANE-DE-2761 accounts for 9 parts of the aqueous emulsion, and the defoamer YK LP D 23014 accounts for 0.5 parts;

[0048] (2) an isocyanate composition, comprising 10 parts of IDPI, 5 parts of IPDI-TMP, 1 part of HDI trimer, and 2 parts of mixed dibasic acid dimethyl ester;

[0049] (3) active sand composition accounted for 73 parts;

[0050] (4) Catalytic component: 0.0001 part of 8-hydroxyquinoline zirconium.

[0051] First, mix the above components (1) and (2) evenly, then add components (3) and (4) and stir them with a disperser at a speed of 500 rpm, and use a scraper to apply it on the cement surface, numbered B.

[0052] Example 3

[0053] (1) SETATHANE-DE-2761 accounts for 8 parts in the aqueous emulsion, and the defoamer YK LP D 23014 accounts for 0.4 parts;

[0054] (2) an isocyanate composition, comprising 3 parts of IDPI, 8 parts of IPDI-TMP, 1 part of HDI trimer, and 5 parts of mixed dibasic acid dimethyl ester;

[0055] (3) active sand composition accounts for 75 parts;

[0056] (4) Catalytic component: 0.004 parts of zirconium phosphate.

[0057] The above components (1) and (2) are first mixed evenly, and then components (3) and (4) are added and stirred at a speed of 500 rpm using a disperser, and then applied on the cement surface using a scraper, which is numbered C.

[0058] Example 4

[0059] (1) In the aqueous emulsion, SETATHANE-DE-2761 accounts for 14 parts and the defoamer YK LP D 23014 accounts for 0.5 parts;

[0060] (2) an isocyanate composition, comprising 10 parts of IDPI, 6 parts of IPDI-TMP, and 1.6 parts of a mixed dibasic acid dimethyl ester;

[0061] (3) active sand composition accounts for 68 parts;

[0062] (4) Catalytic component: 0.003 parts of bismuth carboxylate.

[0063] Components (1) and (2) are first mixed evenly, and then components (3) and (4) are added and stirred at a speed of 500 rpm using a disperser, and then applied on the cement surface using a scraper, which is numbered D.

[0064] Example 5

[0065] (1) SETATHANE-DE-2761 accounts for 12 parts of the aqueous emulsion, and the defoamer YK LP D 23014 accounts for 0.7 parts;

[0066] (2) an isocyanate composition, comprising 6.4 parts of IDPI, 7.4 parts of IPDI-TMP, 1.6 parts of HDI trimer, and 1.6 parts of mixed dibasic acid dimethyl ester;

[0067] (3) active sand composition accounts for 70 parts;

[0068] (4) 0.0009 parts of dibutyltin dilaurate.

[0069] The above components (1) and (2) are first mixed evenly, and then components (3) and (4) are added and stirred at a speed of 500 rpm using a disperser, and then applied on the cement surface using a scraper, which is numbered as E.

[0070] Example 6

[0071] (1) SETATHANE-DE-2761 has 11.5 parts in the aqueous emulsion;

[0072] (2) isocyanate composition, IDPI accounts for 10 parts, IPDI-TMP accounts for 4 parts, and HDI trimer accounts for 1.6 parts;

[0073] (3) active sand composition accounts for 72 parts;

[0074] (4) Catalytic component: 0.00005 parts of 8-hydroxyquinoline zirconium.

[0075] The above components (1) and (2) are first mixed evenly, and then components (3) and (4) are added and stirred at a speed of 500 rpm using a disperser, and then applied on the cement surface using a scraper, which is numbered F.

[0076] Example 7

[0077] (1) In the aqueous emulsion, SETATHANE-DE-2761 accounts for 15 parts and the defoamer YK LP D 23014 accounts for 0.5 parts;

[0078] (2) an isocyanate composition, comprising 10 parts of IDPI, 5 parts of IPDI-TMP, 1 part of HDI trimer, and 5 parts of mixed dibasic acid dimethyl ester;

[0079] (3) active sand composition accounts for 64 parts;

[0080] (4) Catalytic component: 0.005 parts of zirconium titanate.

[0081] The above components (1) and (2) are first mixed evenly, and then components (3) and (4) are added and stirred at a speed of 500 rpm using a disperser, and then applied on the cement surface using a scraper, which is numbered G.

[0082] Comparative Example 1

[0083] (1) In the aqueous emulsion, SETATHANE-DE-2761 accounts for 11.5 parts and the defoamer YK LP D 23014 accounts for 0.5 parts;

[0084] (2) isocyanate composition MDI accounts for 14.4 parts;

[0085] (3) The active sand composition accounts for 75 parts.

[0086] First, mix the above components (1) and (2) evenly, then add components (3) and (4) and stir them at a speed of 500 rpm using a disperser, and then apply them on the cement surface using a scraper.

[0087] Comparative Example 2

[0088] (1) SETATHANE-DE-2761 accounts for 12 parts of the aqueous emulsion, and the defoamer YK LP D 23014 accounts for 0.7 parts;

[0089] (2) an isocyanate composition, comprising 15.4 parts of HDI trimer and 5 parts of mixed dibasic acid dimethyl ester;

[0090] (3) active sand composition accounts for 70 parts;

[0091] (4) Catalytic component: 0.0009 parts of dibutyltin dilaurate.

[0092] First, mix the above components (1) and (2) evenly, then add components (3) and (4) and stir them at a speed of 500 rpm using a disperser, and then apply them on the cement surface using a scraper.

[0093] Comparative Example 3

[0094] (1) In the aqueous emulsion, SETATHANE-DE-2761 accounts for 20 parts and the defoamer YK LP D 23014 accounts for 0.5 parts;

[0095] (2) an isocyanate composition, comprising 11.3 parts of IDPI, 11.3 parts of IPDI-TMP, 2.5 parts of HDI trimer, and 5 parts of mixed dibasic acid dimethyl ester;

[0096] (3) active sand composition accounted for 49 parts;

[0097] (4) Catalytic component: 0.002 parts of 8-hydroxyquinoline zirconium.

[0098] First, mix the above components (1) and (2) evenly, then add components (3) and (4) and stir them at a speed of 500 rpm using a disperser, and then apply them on the cement surface using a scraper.

[0099] Test methods and results

[0100] Test routine and yellowing resistance indicators: According to the national standard "GB / T 22374-2018 Floor Coating Materials", the key test indicators are wear resistance, initial fluidity, compressive strength (7d), flexural strength (7d), water resistance (168 hours), alkali resistance (20% NaOH, 72h), acid resistance (10% sulfuric acid, 48h), oil resistance (120# solvent oil, 72h), and artificial aging resistance QUV (400h).

[0101] Table 1 Conventional test results of floor

[0102]

[0103] As can be seen from Table 1, examples A to G all have good appearance, and their performance indicators are close to the excellent mechanical properties of the MDI system, and far better than the yellowing resistance of the MDI system. Compared with other yellowing-resistant waterborne polyurethane mortars, they have excellent appearance, compressive strength, and flexural strength.

[0104] The above-described embodiments are preferred specific implementation methods of the present invention, and the present invention includes but is not limited to the limitations of the above embodiments. Ordinary technicians in the relevant fields should understand that after reading the specification of this application, any changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A yellowing-resistant water-based polyurethane mortar floor. It is characterized in that It is prepared from the following components in parts by weight:

2. The yellowing-resistant water-based polyurethane mortar floor according to claim 1, It is characterized in that The viscosity of the aqueous mortar emulsion is 50 to 600 mPa·s, preferably 100 to 500 mPa·s; Preferably, the water content of the aqueous mortar emulsion is 10 to 45 wt%, preferably 20 to 40 wt%; More preferably, the aqueous mortar emulsion is selected from one or both of SETATHANE-DE-2761WB and SETATHANE-DE-2767.

3. The yellowing-resistant water-based polyurethane mortar floor according to claim 1, It is characterized in that The isocyanate composition is an aliphatic isocyanate composition, preferably at least two or more selected from isophorone diisocyanate (IPDI), an adduct of isophorone diisocyanate and trimethylolpropane (IPDI-TMP), and a hexamethylene diisocyanate polymer (HDI polymer).

4. The yellowing-resistant water-based polyurethane mortar floor according to claim 3, It is characterized in that The isocyanate composition contains 20-70 wt% IPDI, 20-70 wt% IPDI-TMP and 0-20 wt% HDI polymer; Preferably, in the isocyanate composition, IPDI accounts for 39-49 wt %, IPDI-TMP accounts for 39-49 wt %, and HDI polymer accounts for 5-15 wt %.

5. The yellowing-resistant water-based polyurethane mortar floor according to claim 4, It is characterized in that The HDI polymer includes HDI trimer, HDI pentamer and HDI polymer, wherein the content of trimer is 10-80wt%, preferably 10-50%.

6. The yellowing-resistant water-based polyurethane mortar floor according to claim 1, It is characterized in that The active sand composition is selected from two or more of cement, slaked lime, mixed quartz sand, and pigment. Preferably, the particle size of the quartz sand is 50-200 meshes, preferably 80-150 meshes.

7. The yellowing-resistant water-based polyurethane mortar floor according to claim 1, It is characterized in that The catalyst promoter is selected from at least any one of zirconium, bismuth and tin catalysts; preferably, selected from one or more of zirconium acetylacetonate and its chelate, zirconium phosphate, zirconium titanate, bismuth carboxylate and zirconium alcohol compounds containing tertiary amines; More preferably, the catalyst promoter is a zirconium alcoholate catalyst having a tertiary amine, preferably 8-hydroxyquinoline zirconium.

8. The yellowing-resistant water-based polyurethane mortar floor according to any one of claims 1 to 7, It is characterized in that The components also include a certain amount of solvent, the amount of solvent added accounts for 0 to 40 wt% of the mass of the isocyanate composition, preferably 5 to 15 wt%; Preferably, the solvent is selected from one or more of mixed dibasic acid dimethyl ester, propylene glycol methyl ether propionate, ethylene glycol diacetate, propylene glycol diacetate, butyl acetate, xylene, and ethyl acetate.

9. The yellowing-resistant water-based polyurethane mortar floor according to any one of claims 1 to 8, It is characterized in that The aqueous mortar emulsion also includes a defoamer; and / or The catalyst auxiliary agent component is added separately during the construction of the floor material.

10. The method for preparing the yellowing-resistant waterborne polyurethane mortar floor according to any one of claims 1 to 9, It is characterized in that During construction, the aqueous mortar emulsion and the isocyanate composition are firstly mixed evenly, and then the active sand composition and the catalytic aid are added and mixed evenly, and then the floor paving construction is carried out; Preferably, the stirring rate of the stirring is 300-800 rpm.

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