Coating for outdoor customized floor and preparation method thereof

Abstract

The invention relates to the technical field of coatings, and provides a coating for outdoor customized floors and a preparation method thereof.The coating for the outdoor customized floors comprises a component A and a component B. The component A is prepared from, by weight, 85-95 parts of polyaspartic acid prepolymer, 10-30 parts of anti-skid filler, 0.1-0.5 part of defoaming agent, 3-5 parts of adhesion promoter and 0.1-0.3 part of anti-shrinkage agent; and the component B comprises 85-95 parts of a curing agent. By means of the technical scheme, the problems that in the related technology, coatings for outdoor customized floors are poor in skid resistance and abrasion resistance are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to a coating for outdoor customized floors and a preparation method thereof. Background Art

[0002] Customized flooring, as one of the important decorative materials in the field of decoration, has always been favored by the market. Usually, customized flooring is more used in interior decoration, and is relatively less used outdoors. With the continuous improvement of people's awareness of environmental protection and safety, anti-slip and wear resistance have become an important consideration for customized flooring. The anti-slip and wear resistance of indoor customized flooring mainly depends on the polyvinyl chloride coating. However, compared with indoor customized flooring, outdoor customized flooring has more stringent and demanding requirements for anti-slip and wear resistance. Commonly used polyvinyl chloride coatings can no longer meet the requirements of outdoor customized flooring in terms of anti-slip and wear resistance. Therefore, in order to expand the application scope of customized flooring in outdoor environments and meet people's needs for the anti-slip and wear resistance of outdoor customized flooring, it is of great significance to develop a non-slip and wear-resistant outdoor customized floor coating. Summary of the invention

[0003] The present invention provides a coating for outdoor customized floor and a preparation method thereof, which solves the problem of poor anti-slip performance and wear resistance of the coating for outdoor customized floor in the related art.

[0004] The technical solution of the present invention is as follows: The present invention provides a coating for outdoor customized floor, comprising component A and component B, wherein the raw materials of component A include the following components in parts by weight: 85-95 parts of polyaspartic acid prepolymer, 10-30 parts of anti-slip filler, 0.1-0.5 parts of defoaming agent, 3-5 parts of adhesion promoter, and 0.1-0.3 parts of anti-crater agent; The component B includes 85 to 95 parts of a curing agent.

[0005] As a further technical solution, the preparation method of the polyaspartic acid prepolymer comprises the following steps: S1, reacting vegetable oil fatty acid, polyacid, polyol and catalyst A for the first time to obtain reactant A; S2, reacting the reactant A, alkyl alcohol and catalyst B for a second time to obtain reactant B; S3, reacting the reactant B and the hindered amine for the third time to obtain the polyaspartic acid prepolymer.

[0006] In the present invention, the preparation method of the polyaspartic acid prepolymer is both environmentally friendly and economical, avoids cumbersome operations, and improves the production efficiency of outdoor customized floor coatings.

[0007] As a further technical solution, in step S1, by weight, 2-6 parts of vegetable oil fatty acid, 40-45 parts of polyacid, 20-25 parts of polyol, and 0.05-0.1 parts of catalyst A are used.

[0008] As a further technical solution, the vegetable oil fatty acid includes one of soybean oleic acid, cottonseed oleic acid, sunflower oleic acid, and safflower oleic acid.

[0009] As a further technical solution, the polyacid includes one of maleic anhydride, succinic anhydride and glutaric anhydride.

[0010] As a further technical solution, the polyol includes one of ethylene glycol, propylene glycol, butylene glycol and pentanediol.

[0011] As a further technical solution, the catalyst A includes one of dibutyltin dilaurate, stannous octoate, and tetrabutyl titanate.

[0012] As a further technical solution, the alkyl alcohol includes one of sorbitol, pentaerythritol, glycerol and neopentyl glycol.

[0013] As a further technical solution, the catalyst B includes one of monobutyltin oxide and dibutyltin oxide.

[0014] As a further technical solution, the hindered amine includes one of an alkylamine without a benzene ring and an etheramine without a benzene ring.

[0015] In the present invention, the vegetable oil fatty acid is preferably soybean oil acid; the polyacid is preferably maleic anhydride; the polyol is preferably pentanediol; the catalyst A is preferably dibutyltin dilaurate; the alkyl alcohol is preferably sorbitol; the catalyst B is preferably dibutyltin oxide; the hindered amine can be selected from alkylamines not containing a benzene ring or etheramines not containing a benzene ring, the alkylamines not containing a benzene ring can be selected from n-butylamine, isobutylamine, diethylamine, triethylamine, etc., preferably triethylamine, the etheramines not containing a benzene ring can be selected from methoxyethylamine, ethoxyethylamine, propylene glycol monomethyl etheramine, etc., preferably ethoxyethylamine.

[0016] As a further technical solution, in step S2, the weight ratio of the reactant A to the alkyl alcohol and the catalyst B is 1:2 to 2.5:0.02.

[0017] As a further technical solution, in step S3, the weight ratio of the reactant B to the hindered amine is 1:2-2.5.

[0018] As a further technical solution, in step S1, during the first reaction, the temperature is 60-120° C. and the time is 2-4 hours.

[0019] As a further technical solution, in step S2, during the second reaction, the temperature is 90-120° C. and the time is 2-4 hours.

[0020] As a further technical solution, in step S3, during the third reaction, the temperature is 90-120° C. and the time is 2-3 h.

[0021] As a further technical solution, the anti-slip filler includes one of quartz sand, basalt powder and calcium carbonate.

[0022] As a further technical solution, the defoaming agent is a silicone defoaming agent.

[0023] As a further technical solution, the adhesion promoter includes one of acrylic resin, epoxy resin and polyurethane.

[0024] As a further technical solution, the anti-cratering agent includes one of fatty alcohol polyoxyethylene ether, silicone, and cellulose acetate butyrate.

[0025] As a further technical solution, the curing agent includes one or both of polyether-modified aliphatic isocyanate and polyester-modified aliphatic isocyanate.

[0026] In the present invention, the anti-slip filler is preferably quartz sand; the addition of a defoaming agent can maintain the stability of the coating system, and the silicone defoaming agent can be selected from AFE-3168, KS-66, KSZ-108, etc., preferably AFE-3168; the addition of an adhesion promoter can improve the interlayer adhesion and make the coating system more stable, and it is preferably an acrylic resin; the addition of an anti-cratering agent can make the coating easier to level during construction, reduce construction defects such as sagging and shrinkage, and improve the flatness and appearance quality of the coating, and it is preferably a fatty alcohol polyoxyethylene ether; by optimizing the type of curing agent, the curing efficiency can be improved, and the curing agent is preferably a mixture of polyether-modified aliphatic isocyanate and polyester-modified aliphatic isocyanate in a weight ratio of 1:1.

[0027] As a further technical solution, when the anti-slip filler is quartz sand, the quartz sand is modified quartz sand, the raw materials of the modified quartz sand include quartz sand, sodium stearate and polyvinyl butyral, and the weight ratio of the quartz sand, sodium stearate and polyvinyl butyral is 10~13:0.5:1.5.

[0028] In the present invention, the inventors found that by modifying quartz sand with sodium stearate and polyvinyl butyral, the wear resistance of outdoor customized floor coatings can be further improved. It is speculated that the modification can change the physical dispersion of quartz sand in the coating into chemical bonding, thereby further improving the strengthening effect of quartz sand, and further improving the wear resistance of outdoor customized floor coatings. When the weight ratio of quartz sand, sodium stearate and polyvinyl butyral is 10~13:0.5:1.5, the wear resistance of outdoor customized floor coatings can be further improved.

[0029] As a further technical solution, the preparation method of the modified quartz sand comprises the following steps: A1. Dissolve sodium stearate in water, add quartz sand, soak, and dehydrate to obtain a precursor; A2. Dissolve polyvinyl butyral in ethyl acetate, add the precursor, disperse evenly, and dry to obtain the modified quartz sand.

[0030] In the present invention, quartz sand is first modified by sodium stearate, so that the surface of quartz sand can be rich in anions, and then modified by polyvinyl butyral to enhance the modification effect, thereby further improving the wear resistance of outdoor customized floor coatings.

[0031] The present invention also provides a method for preparing the outdoor customized floor coating, comprising the following steps: B1. Mix the raw materials of component A, degas, and obtain component A; B2. Mix the component A and the component B evenly to obtain a coating for outdoor customized floors.

[0032] As a further technical solution, the volume ratio of component A to component B is 1:1.

[0033] The working principle and beneficial effects of the present invention are: In the present invention, component A uses polyaspartic acid prepolymer as the main raw material, so that the outdoor custom floor coating has good anti-skid performance and wear resistance. In addition, the added anti-skid filler can be physically dispersed in the coating, which can make the coating have good anti-skid performance on the one hand, and can significantly improve the wear resistance of the coating on the other hand. DETAILED DESCRIPTION The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the following embodiments and comparative examples, unless otherwise specified, the particle size of quartz sand is 45 μm; the particle size of calcium carbonate is 45 μm; the model of the defoaming agent is AFE-3168; the adhesion promoter is acrylic resin, model HY1330; the anti-cratering agent is fatty alcohol polyoxyethylene ether, model AEO-15; the model of polyether-modified aliphatic isocyanate is HI100; the model of polyester-modified aliphatic isocyanate is SH-2825; and the model of polyvinyl butyral is Kuraray B20H.

[0035] Example 1 A method for preparing a coating for outdoor customized floors comprises the following steps: B1. Mix 85 parts of polyaspartic acid prepolymer, 10 parts of calcium carbonate, 0.1 parts of defoaming agent, 3 parts of adhesion promoter, and 0.1 parts of anti-cratering agent by weight, and degas to obtain component A; The preparation method of the polyaspartic acid prepolymer comprises the following steps: S1, react 2 parts of cottonseed oil acid, 40 parts of succinic anhydride, 20 parts of ethylene glycol and 0.05 parts of stannous octoate at 60°C for 4 hours to obtain reactant A; S2, reacting reactant A, pentaerythritol and monobutyl tin oxide (the weight ratio of reactant A to pentaerythritol and monobutyl tin oxide is 1:2:0.02) at 90° C. for 4 hours to obtain reactant B; S3, reacting reactant B and triethylamine (the weight ratio of reactant B to triethylamine is 1:2) at 90° C. for 3 h to obtain a polyaspartic acid prepolymer; B2. Mix 42.5 parts of polyether-modified aliphatic isocyanate and 42.5 parts of polyester-modified aliphatic isocyanate to obtain component B, and evenly mix component A and component B in a volume ratio of 1:1 to obtain a coating for outdoor customized floors.

[0036] Example 2 A method for preparing a coating for outdoor customized floors comprises the following steps: B1. Mix 95 parts of polyaspartic acid prepolymer, 30 parts of quartz sand, 0.5 parts of defoaming agent, 5 parts of adhesion promoter, and 0.3 parts of anti-shrinkage agent by weight, and degas to obtain component A; The preparation method of the polyaspartic acid prepolymer comprises the following steps: S1, react 6 parts of soybean oil acid, 45 parts of maleic anhydride, 25 parts of pentanediol and 0.1 parts of dibutyltin dilaurate at 120° C. for 2 hours to obtain reactant A; S2, reacting reactant A, sorbitol and dibutyltin oxide (the weight ratio of reactant A to sorbitol and dibutyltin oxide is 1:2.5:0.02) at 120° C. for 2 h to obtain reactant B; S3, reacting reactant B and ethoxyethylamine (the weight ratio of reactant B to ethoxyethylamine is 1:2.5) at 120° C. for 2 hours to obtain a polyaspartic acid prepolymer; B2. Mix 42.5 parts of polyether-modified aliphatic isocyanate and 42.5 parts of polyester-modified aliphatic isocyanate to obtain component B, and evenly mix component A and component B in a volume ratio of 1:1 to obtain a coating for outdoor customized floors.

[0037] Example 3 The only difference between this embodiment and embodiment 2 is that in this embodiment, the quartz sand is modified quartz sand, and the preparation method of the modified quartz sand comprises the following steps: dissolving 0.5 parts of sodium stearate and 1.5 parts of polyvinyl butyral in 40 parts of ethanol at 5°C, adding 28 parts of quartz sand, dispersing evenly, and drying to obtain modified quartz sand.

[0038] Example 4 The difference between this embodiment and embodiment 3 is that in this embodiment, the preparation method of modified quartz sand comprises the following steps: A1. Dissolve 1.5 parts of polyvinyl butyral in 40 parts of ethyl acetate, add 28 parts of quartz sand, disperse evenly, and dry to obtain a precursor; A2. Dissolve 0.5 parts of sodium stearate in 40 parts of water, add the precursor, immerse, and dehydrate to obtain modified quartz sand.

[0039] Example 5 The difference between this embodiment and embodiment 3 is that in this embodiment, the preparation method of modified quartz sand comprises the following steps: A1. Dissolve 0.5 parts of sodium stearate in 40 parts of water, add 28 parts of quartz sand, soak, and dehydrate to obtain a precursor; A2. Dissolve 1.5 parts of polyvinyl butyral in 40 parts of ethyl acetate, add the precursor, disperse evenly, and dry to obtain modified quartz sand.

[0040] Example 6 The only difference between this embodiment and embodiment 4 is that, in this embodiment, the weight parts of sodium stearate are 1.5 parts, the weight parts of polyvinyl butyral are 4.5 parts, and the weight parts of quartz sand are 24 parts.

[0041] Example 7 The only difference between this embodiment and embodiment 4 is that, in this embodiment, the weight portion of sodium stearate is 1.25 parts, the weight portion of polyvinyl butyral is 3.75 parts, and the weight portion of quartz sand is 25 parts.

[0042] Example 8 The only difference between this embodiment and embodiment 4 is that, in this embodiment, the weight portion of sodium stearate is 1 part, the weight portion of polyvinyl butyral is 3 parts, and the weight portion of quartz sand is 26 parts.

[0043] Comparative Example 1 The difference between this comparative example and Example 1 is only that, in this comparative example, no calcium carbonate is added.

[0044] Experimental Example 1 Anti-slip Performance Test The static friction coefficient of the coating film after curing of the outdoor customized floor coating prepared in Examples 1 to 8 was tested using a touch screen dynamic and static friction coefficient tester (model: YN-DX01), wherein the sample size was 8 cm×20 cm, and the total mass of the slider including the sample was 200 g. The results showed that the static friction coefficient of the coating film after curing of the outdoor customized floor coating was 0.64 to 0.69. This indicates that the outdoor customized floor coating prepared in the present invention has good anti-slip performance.

[0045] Experimental Example 2 Wear Resistance According to GB / T 1768-2006 "Determination of Abrasion Resistance of Paints and Varnishes - Rotating Rubber Grinding Wheel Method", the wear resistance of the cured coating films of the outdoor custom floor coatings prepared in Examples 1 to 8 and Comparative Example 1 was tested, wherein the load was 1 kg, the test number of revolutions was 500, and the results were retained to one decimal place.

[0046] The results are shown in Table 1 below.

[0047] Table 1 Wear resistance test results

[0048] The comparison between Example 1 and Comparative Example 1 shows that the addition of anti-slip filler can significantly improve the wear resistance of the coating. The comparison between Example 2 and Examples 3 to 8 shows that the wear resistance of the outdoor custom floor coating can be further improved by modifying the quartz sand with sodium stearate and polyvinyl butyral. The comparison between Example 5 and Examples 3 to 4 shows that the wear resistance of the outdoor custom floor coating can be further improved by first modifying the quartz sand with sodium stearate and then modifying it with polyvinyl butyral. The comparison between Examples 5 to 6 and Examples 7 to 8 shows that when the weight ratio of quartz sand, sodium stearate and polyvinyl butyral is 10 to 13:0.5:1.5, the wear resistance of the outdoor custom floor coating can be further improved.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coating for outdoor custom floors, characterized in that: The invention comprises component A and component B, wherein the raw materials of component A comprise the following components in parts by weight: 85-95 parts of polyaspartic acid prepolymer, 10-30 parts of anti-slip filler, 0.1-0.5 parts of defoaming agent, 3-5 parts of adhesion promoter, and 0.1-0.3 parts of anti-cratering agent; The component B includes 85 to 95 parts of a curing agent.

2. The outdoor custom floor coating according to claim 1, characterized in that: The preparation method of the polyaspartic acid prepolymer comprises the following steps: S1, reacting vegetable oil fatty acid, polyacid, polyol and catalyst A for the first time to obtain reactant A; S2, reacting the reactant A, alkyl alcohol and catalyst B for a second time to obtain reactant B; S3, reacting the reactant B and the hindered amine for the third time to obtain the polyaspartic acid prepolymer.

3. The outdoor custom floor coating according to claim 2, characterized in that: In step S1, by weight, 2-6 parts of vegetable oil fatty acid, 40-45 parts of polyacid, 20-25 parts of polyol, and 0.05-0.1 parts of catalyst A are used.

4. The outdoor custom floor coating according to claim 2, characterized in that: The vegetable oil fatty acid comprises one of soybean oleic acid, cottonseed oleic acid, sunflower oleic acid and safflower oleic acid; and / or The polyacid comprises one of maleic anhydride, succinic anhydride and glutaric anhydride; and / or The polyol comprises one of ethylene glycol, propylene glycol, butylene glycol and pentanediol; and / or The catalyst A comprises one of dibutyltin dilaurate, stannous octoate and tetrabutyl titanate; and / or The alkyl alcohol comprises one of sorbitol, pentaerythritol, glycerol and neopentyl glycol; and / or The catalyst B comprises one of monobutyltin oxide and dibutyltin oxide; and / or The hindered amine includes one of an alkylamine without a benzene ring and an etheramine without a benzene ring.

5. The outdoor custom floor coating according to claim 2, characterized in that: In step S2, the weight ratio of the reactant A to the alkyl alcohol and the catalyst B is 1:2 to 2.5:0.02; and / or In step S3, the weight ratio of the reactant B to the hindered amine is 1:2-2.

5.

6. The outdoor custom floor coating according to claim 2, characterized in that: In step S1, during the first reaction, the temperature is 60-120° C. and the time is 2-4 hours; and / or In step S2, the second reaction is carried out at a temperature of 90-120° C. for 2-4 hours; and / or In step S3, during the third reaction, the temperature is 90-120° C. and the time is 2-3 hours.

7. The outdoor custom floor coating according to any one of claims 1 to 6, characterized in that: The anti-slip filler comprises one of quartz sand, basalt powder and calcium carbonate; and / or The defoamer is a silicone defoamer; and / or The adhesion promoter includes one of acrylic resin, epoxy resin and polyurethane; and / or The anti-cratering agent includes one of fatty alcohol polyoxyethylene ether, silicone, and cellulose acetate butyrate; and / or The curing agent includes one or both of polyether-modified aliphatic isocyanate and polyester-modified aliphatic isocyanate.

8. The outdoor custom floor coating according to claim 7, characterized in that: When the anti-slip filler is quartz sand, the quartz sand is modified quartz sand, the raw materials of the modified quartz sand include quartz sand, sodium stearate and polyvinyl butyral, and the weight ratio of the quartz sand, sodium stearate and polyvinyl butyral is 10~13:0.5:1.

5.

9. The outdoor custom floor coating according to claim 8, characterized in that: The preparation method of the modified quartz sand comprises the following steps: A1. Dissolve sodium stearate in water, add quartz sand, soak, and dehydrate to obtain a precursor; A2. Dissolve polyvinyl butyral in ethyl acetate, add the precursor, disperse evenly, and dry to obtain the modified quartz sand.

10. The method for preparing a coating for outdoor customized flooring according to any one of claims 1 to 9, characterized in that: The following steps are involved: B1. Mix the raw materials of component A, degas, and obtain component A; B2. Mix the component A and the component B evenly to obtain a coating for outdoor customized floors.

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