Elastic anti-slip polyurethane coating and preparation process thereof

Abstract

The invention discloses an elastic anti-skid polyurethane coating, which comprises, by weight, 65-80 parts of polyurethane resin, 30-80 parts of filler, 18-28 parts of A rubber particles, 22-40 parts of B rubber particles, 15-40 parts of water, 14-18 parts of dimethylaminoethyl acrylate, 15-20 parts of curing agent, 1-1.5 parts of leveling agent, 2-4 parts of diluent, 0.8-1.4 parts of dispersant and 0.5-0.7 parts of defoaming agent, and can effectively improve the slip performance.

Description

Technical Field

[0001] The invention belongs to the field of anti-skid elastic coatings. Background Art

[0002] The basic principle of polyurethane self-leveling floor coating is to pour the polyurethane self-leveling floor coating on the ground and rely on gravity to freely diffuse to form a horizontal surface. In principle, the surface structure finally formed by the existing self-leveling coating has the following characteristics: the surface of the self-leveling coating spontaneously tends to the horizontal plane, and the components in the coating are evenly dispersed, and no layered structure is produced. At the same time, the coating surface has the characteristics of smoothness and flatness, and the smooth and flat surface has the function of non-slip, and people are prone to slip when walking on the smooth floor paint surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0003] Attached Figure 1 Schematic diagram of the longitudinal section of the self-leveling paint after curing. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an elastic anti-skid polyurethane coating and a preparation process thereof, which can effectively improve the slip performance.

[0005] The invention discloses an elastic anti-skid polyurethane coating, which comprises, by weight: 65-80 parts of polyurethane resin; 30-80 parts of filler; 18-28 parts of A rubber particles; 22-40 parts of B rubber particles; 15-40 parts of water; 14-18 parts of dimethylaminoethyl acrylate; 15-20 parts of curing agent; 1-1.5 parts of leveling agent; 2-4 parts of diluent; 0.8-1.4 parts of dispersant; and 0.5-0.7 parts of defoaming agent.

[0006] Furthermore, the equivalent particle size range of any single rubber particle is 1.6 to 2 mm.

[0007] Furthermore, the equivalent particle size range of any single rubber particle b is 2.4 to 3 mm.

[0008] Furthermore, density regulators are added to the rubber materials used to prepare rubber particles a and rubber particles b.

[0009] Furthermore, the density regulator is barium sulfate.

[0010] Further, let the density of rubber particle a be P1;

[0011] Assume that the density of the liquid after the polyurethane resin, dimethylaminoethyl methacrylate, deionized water, filler, leveling agent, defoamer, diluent, dispersant and curing agent are mixed according to the proportion is P2;

[0012] Assume that the density of rubber particle b is P3; P1 must satisfy P2-(0.1×P2)<P1<P2-(0.05×P2); P3 must satisfy P2+(0.1×P2)>P3>P2+(0.05×P2).

[0013] Furthermore, a preparation process of an elastic anti-slip polyurethane coating comprises the following steps:

[0014] S1-1, mixing the weighed polyurethane resin, deionized water, dimethylaminoethyl methacrylate, diluent and dispersant, and stirring;

[0015] S1-2, adding the weighed curing agent, leveling agent, defoaming agent and filler to the mixture obtained in S1-1, stirring continuously;

[0016] S1-3, the density P2 of the emulsion obtained at the end of S1-2 is measured by a densitometer;

[0017] S1-4, putting the rubber base material into a mixer, and gradually adding barium sulfate during the mixing process according to the density requirements of the rubber particles a or b, so as to adjust the hardness and density of the rubber, so that the density of the rubber base material reaches the target density range; then the mixed rubber mixture is sent to a pulverizer, and then the pulverized rubber blocks are sent to a granulator, and further processed into particles through a mold or extrusion; finally, the rubber particles a and the rubber particles b are obtained;

[0018] When preparing a rubber particle, P1 needs to satisfy P2-(0.1×P2)<P1<P2-(0.05×P2);

[0019] When preparing rubber particles b, P3 must satisfy P2+(0.1×P2)>P3>P2+(0.05×P2);

[0020] According to the above method, a certain amount of a rubber particle and b rubber particle are obtained respectively.

[0021] S1-5, weigh rubber particles a and rubber particles b according to the proportion, mix the weighed rubber particles a and rubber particles b into the emulsion obtained at the end of S1-2, and stir, under the control of the numerical relationship of P2-(0.1×P2)<P1<P2-(0.05×P2) and P2+(0.1×P2)>P3>P2+(0.05×P2); the buoyancy of the rubber particles a in the emulsion obtained at the end of S1-2 is greater than their own gravity, and after the gravity and buoyancy cancel each other out, the rubber particles a have a weak tendency to float upward; since the emulsion obtained at the end of S1-2 itself has a certain viscosity, under a static condition without violent disturbance and within the time interval of t0 to t1, the weak tendency of the rubber particles a to float upward will not immediately and significantly float upward under the viscosity of the emulsion.

[0022] The buoyancy of the rubber particles b in the emulsion obtained at the end of S1-2 is slightly smaller than their own gravity. After the gravity and buoyancy cancel each other out, the rubber particles b have a slight tendency to sink. Since the emulsion obtained at the end of S1-2 itself has a certain viscosity, in a static state without intense disturbance and within the time interval of t0 to t1, the slight tendency of the rubber particles b to sink will not immediately sink significantly due to the viscosity of the emulsion.

[0023] This is equivalent to the rubber particles a and b being uniformly suspended in the emulsion obtained at the end of S1-2 during the time interval t0 to t1;

[0024] Furthermore, a construction process of an elastic anti-slip polyurethane coating comprises the following steps:

[0025] S2-1, use a portable stirrer to stir the emulsion in the finished product packaging tank at the construction site for at least 15 minutes, so that the a rubber particles and b rubber particles are re-evenly suspended in the emulsion in the finished product packaging tank;

[0026] S2-2, pour the emulsion in the finished product packaging can evenly on the target ground, use its own fluidity to automatically level the emulsion, and make the self-leveling thickness exceed 10mm;

[0027] S2-3, after the emulsion is evenly leveled on the ground, a vibration machine is immediately used to apply vibration for a preset time to the target ground, so that the surface of the target ground vibrates continuously, and the vibration is transmitted to the leveling emulsion on the ground in real time, so that the leveling emulsion vibrates along with it, and the a rubber particles and b rubber particles in the leveled emulsion float up and sink under the action of buoyancy and gravity respectively under the driving and promoting action of the vibration; the a rubber particles float to the surface of the leveled emulsion to form a uniformly distributed surface wear-resistant and anti-skid layer, and the b rubber particles sink to the bottom of the leveled emulsion to form a uniformly distributed rubber particle elastic support layer; an intermediate solidified layer is formed between the rubber particle elastic support layer and the surface wear-resistant layer.

[0028] Beneficial effects: After the leveling emulsion is completely cured, the surface of the cured floor paint not only forms a surface wear-resistant layer composed of a mixture of a rubber particle and polyurethane paint with a certain surface elasticity, but also because the upper part of each a rubber particle before the emulsion is cured will be slightly higher than the emulsion surface under the action of buoyancy, the surface of the cured floor paint also forms a number of evenly distributed wear-resistant and anti-skid protrusions composed of the upper parts of a rubber particles, thereby playing the role of wear resistance and anti-skid at the same time; a relatively dense rubber particle support layer composed of a mixture of b rubber particles and polyurethane paint is formed at the bottom of the cured floor paint, because the amount of barium sulfate added to the b rubber particles is greater than the amount of barium sulfate added to the a rubber particles, the b rubber particles have a higher hardness and stronger supporting force, and have a certain elasticity due to the rubber characteristics; when the surface of the cured paint is impacted, the elastic support layer of the rubber particles will adaptively undergo a certain deformation, play an effective buffering role, and prevent the paint from cracking and fatigue due to impact, and the elastic structure inhibits plastic depression. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] An elastic anti-skid polyurethane coating, comprising, by weight:

[0031] 65-80 parts of polyurethane resin; 30-80 parts of filler; 18-28 parts of a rubber particles; 22-40 parts of b rubber particles; 15-40 parts of water; 14-18 parts of dimethylaminoethyl acrylate; 15-20 parts of curing agent; 1-1.5 parts of leveling agent; 2-4 parts of diluent; 0.8-1.4 parts of dispersant; 0.5-0.7 parts of defoaming agent. The above-mentioned fillers are quartz powder and talcum powder; the leveling agent is polyether polyester modified organic siloxane; the defoaming agent is a polyether type defoaming agent; the diluent is phenyl glycidyl ether; the curing agent is isophorone diisocyanate; and the dispersant is potassium salt of polyacrylate.

[0032] In this case, the equivalent particle size range of any single rubber particle a is: 1.6~2mm; the equivalent particle size range of any single rubber particle b is: 2.4~3mm; density regulator is added to the rubber material used to prepare rubber particles a and b; the density regulator is barium sulfate.

[0033] Assume that the density of rubber particle a is P1; Assume that the density of the liquid after mixing polyurethane resin, dimethylaminoethyl methacrylate, deionized water, filler, leveling agent, defoamer, diluent, dispersant and curing agent according to the ratio is P2; Assume that the density of rubber particle b is P3; P1 needs to satisfy P2-(0.1×P2)<P1<P2-(0.05×P2); P3 needs to satisfy P2+(0.1×P2)>P3>P2+(0.05×P2).

[0034] Preparation method:

[0035] S1-1, mix the weighed polyurethane resin, deionized water, dimethylaminoethyl methacrylate, diluent and dispersant, and stir at 850 r / min to 1100 r / min for 60 min to 90 min.

[0036] S1-2, adding the weighed curing agent, leveling agent, defoaming agent and filler to the mixture obtained in S1-1, stirring at 1000 r / min to 1200 r / min for 60 min to 90 min.

[0037] S1-3, the density P2 of the emulsion obtained at the end of S1-2 is measured by a densitometer. In this case, the measured P2 = 1.18 g / cm 3 .

[0038] S1-4, putting the rubber base material into a mixer, starting the mixer for mixing, so that the rubber is softened and has a certain fluidity; first adding reinforcing fillers, such as carbon black, white carbon black, etc., to improve the strength and wear resistance of the rubber; then adding additives such as vulcanizers, accelerators, antioxidants, etc. to improve the processing properties of the rubber.

[0039] According to the density requirements of rubber particles a or rubber particles b, barium sulfate is gradually added during the mixing process to adjust the hardness and density of the rubber so that the density of the rubber base material reaches the target density range; through the stirring and shearing action of the mixer, the rubber, filler and additives are fully mixed to form a uniform rubber compound.

[0040] The kneaded rubber mixture is then sent to a pulverizer, where it is broken into smaller blocks or flakes by mechanical force. The crushed rubber blocks are then sent to a granulator, where they are further processed into particles of a certain shape and size by a mold or extrusion. Finally, the granulated rubber particles are passed through a screening device to remove particles that do not meet the requirements, such as particles that are too large or too small. The screening process helps to ensure the uniformity and consistency of the rubber particles. The screened and graded rubber particles are sent to a drying device to remove moisture and volatile substances therein, and are finally cooled to obtain the target a rubber particle or b rubber particle.

[0041] According to the above method, a certain amount of a rubber particle and b rubber particle are obtained respectively;

[0042] When preparing a rubber particle, P1 needs to satisfy P2-(0.1×P2)<P1<P2-(0.05×P2);

[0043] When preparing rubber particles b, P3 needs to satisfy P2+(0.1×P2)>P3>P2+(0.05×P2).

[0044] According to the above requirements, the amount of barium sulfate added to the b rubber particles is greater than the amount of barium sulfate added to the a rubber particles, so the hardness of the b rubber particles is higher and the supporting force is stronger.

[0045] S1-5, weigh rubber particles a and b according to the proportion, mix the weighed rubber particles a and b into the emulsion obtained at the end of S1-2, and stir at 500 r / min to 800 r / min for 10 min to 30 min: although the density of rubber particles a and the density of rubber particles b are respectively smaller and larger than that of P2, under the control of the numerical relationship of P2-(0.1×P2)<P1<P2-(0.05×P2) and P2+(0.1×P2)>P3>P2+(0.05×P2), the values ​​of P1 and P3 are very close to the value of P2;

[0046] The buoyancy of the a rubber particle in the emulsion obtained at the end of S1-2 is greater than its own gravity. After the gravity and buoyancy cancel each other out, the a rubber particle has a slight tendency to float upward. Since the emulsion obtained at the end of S1-2 itself has a certain viscosity, in a static state without violent disturbance, and within the time interval of t0 to t1 (30 minutes), the a rubber particle will not float significantly immediately due to the viscosity of the emulsion.

[0047] The buoyancy of the b rubber particles in the emulsion obtained at the end of S1-2 is slightly smaller than their own gravity. After the gravity and buoyancy offset each other, the b rubber particles have a slight tendency to sink. Since the emulsion obtained at the end of S1-2 itself has a certain viscosity, in a static state without violent disturbance, and within the time interval of t0 to t1 (30 minutes), the b rubber particles will not sink significantly immediately due to the viscosity of the emulsion.

[0048] This is equivalent to the rubber particles a and b being uniformly suspended in the emulsion obtained at the end of S1-2 within the time interval of t0 to t1 (30 min);

[0049] S1-6, filling the emulsion obtained in S1-5 into a number of finished product packaging cans within the time range of t0 to t1 (30 minutes), so that the total content and ratio of a rubber particles and b rubber particles in the emulsion in each packaging can are consistent; after the emulsion is filled into the number of finished product packaging cans, the a rubber particles and b rubber particles in the emulsion in the finished product packaging cans will be disturbed by vibration and bumps during transportation, and then slowly float up and sink.

[0050] Construction process (due to the ratio characteristics of the coating, this coating is only suitable for self-leveling construction with a thickness of not less than 8mm):

[0051] S2-1, use a portable agitator to stir the emulsion in the finished product packaging tank at the construction site for at least 15 minutes, so that the a rubber particles and b rubber particles are re-evenly suspended in the emulsion in the finished product packaging tank.

[0052] S2-2, pour the emulsion in the finished product packaging can onto the target ground within the time range of t0 to t1 (30 minutes), use its own fluidity to automatically level the ground, form a leveling emulsion, and make the thickness of the self-leveling leveling emulsion exceed 10 mm.

[0053] S2-3, after the emulsion is evenly leveled on the ground, a vibration machine is immediately used to apply vibration to the target ground for a preset time, so that the surface of the target ground vibrates continuously, and the vibration is transmitted to the leveling emulsion on the ground in real time, so that the leveling emulsion vibrates, so that the a rubber particles and b rubber particles in the leveling emulsion are mutually evacuated under the promotion of vibration. After more than 30 minutes, the a rubber particles and b rubber particles in the leveling emulsion spontaneously float and sink slowly under the promotion of vibration and the action of buoyancy and gravity. As time goes by, most of the a rubber particles float to the surface of the leveling emulsion to form a uniformly distributed surface wear-resistant and anti-skid layer, and most of the b rubber particles sink to the bottom of the leveling emulsion to form a uniformly distributed rubber particle elastic support layer; an intermediate solidified layer is formed between the rubber particle elastic support layer and the surface wear-resistant layer;

[0054] S2-4, such as Figure 1 As shown in the figure, after the leveling emulsion is completely cured, the surface of the cured floor coating not only forms a surface wear-resistant layer composed of a rubber particle and polyurethane coating with a certain surface elasticity, but also, because the upper part of each a rubber particle before the emulsion is cured will be slightly higher than the emulsion surface under the action of buoyancy, the surface of the cured floor coating also forms a number of evenly distributed wear-resistant and anti-skid protrusions composed of the upper parts of a rubber particles, thereby playing the role of wear resistance and anti-skid at the same time;

[0055] After the ground is cured, a relatively dense rubber particle support layer composed of b rubber particles and polyurethane coating is formed at the bottom of the coating. Since the amount of barium sulfate added to the b rubber particles is greater than the amount of barium sulfate added to the a rubber particles, the b rubber particles have a higher hardness and stronger supporting force, and have a certain elasticity due to the rubber properties. When the surface of the cured coating is impacted, the elastic support layer of the rubber particles will adaptively deform to a certain extent, playing an effective buffering role, preventing the coating from cracking and fatigue due to impact, and the elastic structure suppresses the overall plastic depression of the coating.

[0056] In the first embodiment, the elastic anti-slip polyurethane coating is as follows in parts by weight:

[0057]

[0058]

[0059] Based on the ratio of the first embodiment, after the construction, the paint surface of the ground after curing also forms a number of evenly distributed wear-resistant and anti-skid protrusions composed of the upper parts of a number of rubber particles with moderate distribution density. The number and density of the protrusions on the paint surface are moderate and uniform, which can form stable anti-skid performance.

[0060] In the second embodiment, the elastic anti-slip polyurethane coating is as follows in parts by weight:

[0061] Components Weight Polyurethane resin 70 Quartz powder (first filler) 30 Talc (second filler) 20 a Rubber particles 18 b Rubber particles 31 Dimethylaminoethyl methacrylate 16 water 28 Polyether polyester modified organosiloxane (leveling agent) 1.2 Polyether defoamer (defoamer) 0.6 Phenyl glycidyl ether (diluent) 3 Potassium polyacrylate (dispersant) 1 Isophorone diisocyanate (curing agent) 18

[0062] Based on the ratio of the second embodiment, after the construction, the paint surface of the ground after curing also forms a number of evenly distributed wear-resistant and anti-skid protrusions composed of the upper parts of a rubber particles. The distribution density is too sparse, the number of protrusions on the paint surface is relatively small, and it has anti-slip performance and stability deviation.

[0063] In the third embodiment, the elastic anti-skid polyurethane coating is as follows in parts by weight:

[0064]

[0065]

[0066] Based on the ratio of the third embodiment, after the construction, the paint surface after the ground solidifies also forms a number of evenly distributed wear-resistant and anti-skid protrusions composed of the upper parts of a rubber particles. The distribution density is too dense, the number of protrusions on the paint surface is too large, and a large number of protrusions are clustered into multiple connections, which makes it difficult to form a stable anti-skid paint surface.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An elastic non-slip polyurethane coating, characterized in that: The proportions by weight include: 65-80 parts of polyurethane resin; 30-80 parts of filler; 18-28 parts of a rubber particles; 22-40 parts of b rubber particles; 15-40 parts of deionized water; 14-18 parts of dimethylaminoethyl methacrylate; 15-20 parts of curing agent; 1-1.5 parts of leveling agent; 2-4 parts of diluent; 0.8-1.4 parts of dispersant; 0.5-0.7 parts of defoaming agent; The equivalent particle size range of any single rubber particle is: 1.6~2mm; The equivalent particle size range of any single rubber particle b is: 2.4~3mm; Density regulators are added to the rubber materials used to prepare rubber particles a and rubber particles b; The density regulator is barium sulfate; Assume the density of rubber particle a is P1; Assume that the density of the liquid after the polyurethane resin, dimethylaminoethyl methacrylate, deionized water, filler, leveling agent, defoamer, diluent, dispersant and curing agent are mixed according to the proportion is P2; Assume that the density of rubber particle b is P3; P1 must satisfy P2-(0.1×P2)<P1<P2-(0.05×P2); P3 must satisfy P2+(0.1×P2)>P3>P2+(0.05×P2).

2. The process for preparing an elastic non-slip polyurethane coating according to claim 1, characterized in that: The steps include: S1-1, mixing the weighed polyurethane resin, deionized water, dimethylaminoethyl methacrylate, diluent and dispersant, and stirring; S1-2, adding the weighed curing agent, leveling agent, defoaming agent and filler to the mixture obtained in S1-1, and stirring; S1-3, the density P2 of the emulsion obtained at the end of S1-2 is measured by a densitometer; S1-4, putting the rubber base material into a mixer, and gradually adding barium sulfate during the mixing process according to the density requirements of the rubber particles a or b, so as to adjust the hardness and density of the rubber, so that the density of the rubber base material reaches the target density range; then the mixed rubber mixture is sent to a pulverizer, and then the pulverized rubber blocks are sent to a granulator, and further processed into particles through a mold or extrusion; finally, the rubber particles a and the rubber particles b are obtained; When preparing a rubber particle, P1 needs to satisfy P2-(0.1×P2)<P1<P2-(0.05×P2); When preparing b rubber particles, P3 must satisfy P2+(0.1×P2)>P3>P2+(0.05×P2); According to S1-4, a certain amount of a rubber particle and b rubber particle are obtained respectively; S1-5, weighing rubber particles a and rubber particles b according to the proportion, and mixing the weighed rubber particles a and rubber particles b into the emulsion obtained at the end of S1-2, and stirring, under the control of the numerical relationship of P2-(0.1×P2)<P1<P2-(0.05×P2) and P2+(0.1×P2)>P3>P2+(0.05×P2); The buoyancy of the a rubber particle in the emulsion obtained at the end of S1-2 is greater than its own gravity. After the gravity and buoyancy cancel each other out, the a rubber particle has a slight tendency to float upward. Since the emulsion obtained at the end of S1-2 itself has a certain viscosity, the a rubber particle will not float up immediately and significantly under the viscosity of the emulsion. The buoyancy of the rubber particles b in the emulsion obtained at the end of S1-2 is slightly smaller than their own gravity. After the gravity and buoyancy cancel each other out, the rubber particles b have a slight tendency to sink. Since the emulsion obtained at the end of S1-2 itself has a certain viscosity, the slight tendency of the rubber particles b to sink will not sink immediately and significantly under the viscosity of the emulsion. This is equivalent to the a rubber particles and b rubber particles being uniformly suspended in the emulsion obtained at the end of S1-2.

3. The construction process of an elastic anti-skid polyurethane coating according to claim 2, characterized in that: The steps include: S2-1, use a portable stirrer to stir the emulsion in the finished product packaging tank at the construction site for at least 15 minutes, so that the a rubber particles and b rubber particles are re-evenly suspended in the emulsion in the finished product packaging tank; S2-2, pour the emulsion in the finished product packaging can evenly on the target ground, use its own fluidity to automatically level it, form a leveling emulsion, and make the self-leveling thickness exceed 10mm; S2-3, after the emulsion is evenly leveled on the ground, a vibration machine is immediately used to apply vibration for a preset time to the target ground, so that the surface of the target ground vibrates continuously, and the vibration is transmitted to the leveling emulsion on the ground in real time, so that the leveling emulsion vibrates along with it, so that the a rubber particles and b rubber particles in the leveling emulsion float up and sink under the action of buoyancy and gravity respectively under the driving and promoting action of the vibration; the a rubber particles float to the surface of the leveling emulsion to form a uniformly distributed surface wear-resistant and anti-skid layer, and the b rubber particles sink to the bottom of the leveling emulsion to form a uniformly distributed rubber particle elastic support layer; an intermediate solidified layer is formed between the rubber particle elastic support layer and the surface wear-resistant layer.

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