HK1190746B - Anti-slip coating and preparation, application method thereof - Google Patents

Description

Anti-skid coating material and preparation and coating methods thereof

Technical Field

The invention relates to an anti-skid coating material and a preparation method and a coating method thereof, in particular to an anti-skid coating material suitable for vinyl floors and a preparation method and a coating method thereof, and an anti-skid coating obtained by the anti-skid coating material.

Background

In recent years, vinyl flooring has been widely used in home, business and industrial construction due to its advantages of superior performance, convenience in construction, low cost, etc. The anti-skid function is generally required, and the anti-skid rubber is particularly applied to occasions where ponding, greasy dirt and wet and slippery easily occur, such as corridors, stairs, toilets, wash tables, kitchens, bathrooms, swimming pools, factory buildings and the like. The anti-skid function of the vinyl floor is generally realized by coating an anti-skid coating on the surface of the vinyl floor, and various anti-skid coating materials are available in the market at present, but the vinyl floor has the defects of thicker coating, low anti-skid performance and the like.

According to the requirements of the use environment, a flatting agent is required to be added into the antiskid coating material in some cases to reduce the glossiness of the coating surface, and common flatting agents comprise superfine synthetic silica, micronized wax, stearate of aluminum, calcium, magnesium, zinc and the like. However, the addition of conventional matting agents does not contribute to the anti-slip properties of the coating. The standard for the anti-slip test which is usually used is DIN51130 in germany, and the currently customary anti-slip coatings only reach the level of R8 to R9 in the DIN51130 test and do not meet the european market standard. It is therefore desirable to provide a non-slip coating which achieves R10, even R11 in DIN51130 test.

The PMU polymethyl urea is a special organic polymer, has the characteristics of high specific surface area and low bulk density, can be used as a flatting agent in the coating industry, has the advantages of obvious flatting effect, unobvious thickening compared with the conventional inorganic flatting agent, small influence on thixotropy, suitability for a solvent system, particular suitability for a water-based system, high transparency, no ultraviolet absorption and particular suitability for a UV curing system. According to the invention, PMU polymethylurea is added into the anti-skid coating as a flatting agent to replace silicon dioxide or micronized wax, so that a remarkable flatting effect is obtained, the anti-skid performance of the coating is greatly improved, and the anti-skid performance is excellent.

Disclosure of Invention

The invention aims to improve the anti-skid performance of an anti-skid coating for vinyl floor, in particular to a matte anti-skid coating, and provides an anti-skid coating material with higher anti-skid performance.

The anti-skid coating material comprises a main resin, a diluent, a delustering agent, an anti-skid agent, a photoinitiator and/or an auxiliary agent. No solvent is contained in the non-slip coating material of the present invention.

The preparation method of the anti-skid coating material comprises the steps of uniformly mixing and stirring the main resin, the diluent, the photoinitiator and the auxiliary agent in a stirrer to obtain a mixture A; taking a part of the matting agent and the antiskid agent, taking a part of the mixture A, and dispersing in a high-speed dispersion machine to obtain a mixture B; taking the rest amount of the flatting agent and the anti-slip agent, and taking part amount of the mixture A to disperse in a high-speed dispersion machine to obtain a mixture C; the remaining amount of the mixture A and the obtained mixture B, C were mixed to obtain a final anti-slip coating material.

The coating method of the anti-skid coating material comprises the steps of coating the anti-skid coating material on a base material; treating the anti-slip coating material with infrared radiation; and curing the non-slip coating material by ultraviolet irradiation.

Through detection, the anti-skid coating has the characteristics of thin coating thickness and excellent anti-skid performance.

Detailed Description

The anti-skid coating material adopts PMU polymethylurea particle materials to replace large-particle wax materials adopted in the existing anti-skid coatings, and optionally adopts ceramic microsphere particles as auxiliary anti-skid particles. The contents of the individual components hereinafter, unless otherwise indicated, are based on the total weight of the coating material.

The anti-skid coating material comprises a main resin, a diluent, a delustering agent, an anti-skid agent, a photoinitiator and/or an auxiliary agent.

The host resin is selected from the group consisting of host resins commonly used in UV curable coating materials, including but not limited to polyester acrylates and urethane acrylates. Preferably, the host resin is a urethane acrylate, and more preferably, the host resin is an aliphatic urethane acrylate. The aliphatic polyurethane acrylate has good adhesive force to PVC base materials, and has excellent hardness and flexibility. The content of the main resin is 20-60%, preferably 35-50%;

the diluent is a reactive (meth) acrylate comprising one or more selected from the group consisting of a heterocyclic (meth) acrylate, a difunctional (meth) acrylate, and an aliphatic (meth) acrylate. Wherein the heterocyclic (meth) acrylate may be selected from tetrahydrofuran acrylate (THFA), cyclotrimethylolpropane formal acrylate (CTFA), or N-acryloylmorpholine (acrylorphide), preferably the heterocyclic (meth) acrylate is tetrahydrofuran acrylate. The difunctional (meth) acrylate may be selected from the group consisting of tripropylene glycol diacrylate (TPGDA), polyethylene glycol diacrylate, 1, 6-hexanediol diacrylate (HDDA), 1, 6-Hexanediol Dimethyl Diacrylate (HDDMA) and dipropylene glycol diacrylate, preferably the difunctional (meth) acrylate is tripropylene glycol diacrylate. The aliphatic (meth) acrylate may be selected from linear or branched C8-C12 alkyl (meth) acrylates, preferably the aliphatic (meth) acrylate is isodecyl acrylate. The active (methyl) acrylate is used as a diluent to dilute the oligomer, participates in the photocuring reaction, and has certain influence on various performances such as the curing speed of a coating material, the flexibility of a cured coating and the like. The content of the diluent is 15-55%, preferably 30-50%.

The flatting agent is selected from PMU polymethylurea particles, and has the advantages of remarkable flatting effect, unobvious thickening, suitability for solvent-based systems, particularly aqueous systems, high transparency, no ultraviolet absorption and particularly suitability for ultraviolet curing systems. The PMU polymethylurea particles have an average dispersed particle size of 50-200 microns. The content of PMU polymethyl urea is 3-25%, and the preferable content is 8-15%.

The kind and amount of the photoinitiator are known to those skilled in the art, and may be selected from benzophenone photoinitiators, Irgacure184, Irgacure754, Irgacure369, TPO, Darocur1173, and the like known in the art, wherein the Irgacure series and Darocur series are products of the switzerland turbo purification company, and the product types are known to those skilled in the art. Preferably the photoinitiator is one or more photoinitiators selected from the group consisting of benzophenone photoinitiators, Darocure1173 and Irgacure 754. The content of the photoinitiator is 2-10%, preferably 3-9%;

the anti-slip coating material of the invention optionally also contains ceramic microspherical particles, the main component of which is silicon dioxide, and the ceramic microspherical particles also play the roles of a matting agent and an anti-slip agent. Compared with PMU polymethyl urea used as a main matting agent and an anti-slip agent, the ceramic microsphere particles play an auxiliary role and are an auxiliary matting agent and an auxiliary anti-slip agent. The ceramic microspheroidal particles have a D50 average particle size of 3.5 microns. The content of the ceramic microsphere particles is 0.1-3%, preferably 0.5-2%.

The anti-slip coating material of the present invention may further optionally contain an auxiliary agent including one or more of a defoaming agent, a leveling agent, a lubricant and a dispersing agent, which are commonly used in UV curable coating materials. The kind and amount of the auxiliaries are known to those skilled in the art, for example, the antifoaming agent may be selected from EFKA2022, EFKA2527, BYK352, BYK354, AIREX910, AIREX 920. Among them, EFKA series is a product of loff-card company, netherlands, BYK series is a product of BYK company, and AIREX series is a product of digao company, germany. The content of the auxiliary agent is 0.1-1%, preferably 0.1-0.3%.

The anti-skid coating material does not contain solvent, so that the anti-skid coating material has less harm to human bodies, lower fire hazard and good environmental protection.

The method for preparing the anti-skid coating material comprises the following steps:

a. mixing and stirring aliphatic polyurethane (methyl) acrylate, active (methyl) acrylate, a photoinitiator and an auxiliary agent uniformly in a stirrer to obtain a mixture A;

b. taking 40-50% of PMU polymethyl urea particles and ceramic microsphere particles by weight and 20-50% of the mixture A obtained in the step a by weight, adding the PMU polymethyl urea particles and the ceramic microsphere particles into the mixture A under stirring, and dispersing in a dispersion machine until the Hergeman fineness is 50-90 microns to obtain a mixture B;

c. and (b) taking the rest weight of PMU polymethyl urea particles and ceramic microsphere particles and 20-50% of the weight of the mixture A obtained in the step a, adding the PMU polymethyl urea particles and the ceramic microsphere particles into the mixture A under stirring, and dispersing in a dispersing machine until the Hergeman fineness is more than 90 microns to obtain a mixture C.

d. And C, uniformly mixing the rest mixture A with the mixture B and the mixture C obtained in the steps B and C to obtain the final anti-skid coating material.

The method for applying the anti-slip coating material of the present invention comprises:

a. coating the anti-skid coating material on the base material, wherein the coating amount is 6-35 g/m, preferably 8-20 g/m;

b. treating the anti-slip coating material with infrared radiation, the irradiation temperature is usually 50-70 ℃, preferably 60 ℃, and the irradiation time is usually 0.5-2 minutes, preferably 1 minute; and

c. the anti-slip coating material is cured by ultraviolet irradiation.

The non-slip coating material of the invention after drying has a thickness of 6-35 mm, preferably 8-20 μm. Through detection, the anti-skid coating disclosed by the invention has excellent anti-skid performance.

Examples

Example 1: preparation of anti-skid coating material

Weighing the following components in parts by weight:

39% of aliphatic urethane acrylate;

tetrahydrofuran acrylate 20.4%;

8% of tripropylene glycol diacrylate;

isodecyl acrylate 9%;

14% of PMU polymethyl urea particles;

1% of ceramic microsphere particles;

3.5 percent of benzophenone photoinitiator;

DAROCUR11733%；

IRGACURE 7542%; and

0.1 percent of defoaming agent.

Then mixing the materials according to the following steps to prepare the anti-skid coating material,

a. mixing and stirring aliphatic polyurethane acrylate, tetrahydrofuran acrylate, tripropylene glycol diacrylate, isodecyl acrylate, a photoinitiator and a defoaming agent uniformly in a stirrer to obtain a mixture A;

b. taking 40-50% of PMU polymethyl urea particles and ceramic microsphere particles by weight and 20-50% of the mixture A obtained in the step a by weight, adding the PMU polymethyl urea particles and the ceramic microsphere particles into the mixture A under stirring, and dispersing in a dispersion machine until the Hergeman fineness is 50-90 microns to obtain a mixture B;

c. and (b) taking the rest weight of PMU polymethyl urea particles and ceramic microsphere particles and 20-50% of the weight of the mixture A obtained in the step a, adding PMU polymethyl urea and ceramic microsphere particles into the mixture A under stirring, and dispersing in a dispersing machine until the Hergeman fineness is more than 90 microns to obtain a mixture C.

d. And C, uniformly mixing the rest mixture A with the mixture B and the mixture C obtained in the steps B and C to obtain the final anti-skid coating material.

Example 2: preparation of anti-skid coating material

Weighing the following components in parts by weight:

50% of aliphatic polyurethane acrylate;

tetrahydrofuran acrylate 12.8%;

9% of tripropylene glycol diacrylate;

isodecyl acrylate 12%;

9% of PMU polymethyl urea particles;

2% of ceramic microsphere particles;

2% of benzophenone photoinitiator;

DAROCUR11732%；

IRGACURE 7541%; and

0.2 percent of defoaming agent.

The non-slip coating material was prepared according to the method steps described in example 1.

Example 3: preparation of anti-skid coating material

35% of aliphatic polyurethane acrylate;

15% of cyclotrimethylolpropane methylal acrylate;

15% of tripropylene glycol diacrylate;

isodecyl acrylate 16.9%;

15% of PMU polymethyl urea particles;

2% of benzophenone photoinitiator;

DAROCUR 11731%; and

0.1 percent of defoaming agent.

A slip-resistant coating material was prepared following the procedure described in example 1, except that cyclic trimethylolpropane formal acrylate was used instead of tetrahydrofuran acrylate and ceramic microspheroidal particles were not used.

Example 4: coating of non-slip coating materials

The anti-slip coating materials prepared in examples 1-3 were coated, dried and cured according to the following steps to obtain anti-slip coatings:

step 1: coating the anti-skid coating material on the PVC floor in an amount of 8-20 g/m;

step 2: treating the anti-skid coating material with infrared radiation at 60 ℃ for 1 minute; and

and step 3: the anti-slip coating material is cured by ultraviolet irradiation.

The cured anti-slip coating materials of examples 1-3 were calculated to have a thickness of 8-20 microns and meet the criteria of R10 or above in DIN51130 testing.

Claims (6)

1. An anti-slip coating material comprising, by total weight:

wherein the PMU polymethylurea particles have a mean dispersed particle size of 50-200 microns, and the PMU polymethylurea particles are used to improve the anti-skid property of the anti-skid coating material,

wherein the reactive (meth) acrylate comprises one or more selected from the group consisting of a heterocyclic (meth) acrylate, a difunctional (meth) acrylate, and an aliphatic (meth) acrylate, and

wherein the non-slip coating material does not comprise a solvent.

2. A method of making the non-slip coating material of claim 1, the method of making comprising:

a. mixing and stirring aliphatic polyurethane (methyl) acrylate, active (methyl) acrylate, a photoinitiator and an auxiliary agent uniformly in a stirrer to obtain a mixture A;

b. taking 40-50% of PMU polymethyl urea particles and ceramic microsphere particles by weight and 20-50% of the mixture A obtained in the step a by weight, adding the PMU polymethyl urea particles and the ceramic microsphere particles into the mixture A under stirring, and dispersing in a dispersion machine until the Hergeman fineness is 50-90 microns to obtain a mixture B;

c. b, taking the residual weight of PMU polymethyl urea particles and ceramic microsphere particles, and taking 20-50% of the weight of the mixture A obtained in the step a, adding the PMU polymethyl urea particles and the ceramic microsphere particles into the mixture A under stirring, and dispersing in a dispersion machine until the Hergeman fineness is more than 90 microns to obtain a mixture C;

d. and C, uniformly mixing the rest mixture A with the mixture B and the mixture C obtained in the steps B and C to obtain the final anti-skid coating material.

3. A method of coating a substrate with the non-slip coating material of claim 1, the coating method comprising:

a. coating the anti-slip coating material on a substrate;

b. treating the anti-slip coating material with infrared radiation; and

c. the anti-slip coating material is cured by ultraviolet irradiation.

4. The method of claim 3, wherein the substrate is polyvinyl chloride.

5. A method as claimed in claim 3, wherein the non-slip coating material is applied to the substrate in an amount of from 6 to 35 grams per square metre.

6. The method of claim 3, wherein the cured non-slip coating material has a thickness of 6-35 microns.