CN117701139A - Solvent-free polyurethane floating color sand self-leveling terrace material and preparation method thereof - Google Patents

Abstract

The invention discloses a solvent-free polyurethane floating colored sand self-leveling floor material and a preparation method, which includes component A, component B, component C, and component D; the mass ratio of each component is as follows: Component A: Component B: Component C: Component D=1~1.5: 0.5~1: 0.3~0.6: 0.3~0.6; Component A is polyol resin mixture, additives, pigments and fillers, etc.; Component B is isocyanate blend ; Component C is resin colored sand; Component D is quartz sand. The self-leveling floor material of the present invention realizes self-leveling of thick-coated solvent-free polyurethane with one-time coating and molding. The maximum construction thickness can reach 3 mm. It has high efficiency and fast curing. It can be used for pedestrians after 24 hours of construction at 25°C; after curing , resin colored sand floats on the surface of the material, has a strong colored sand texture, is highly decorative and wear-resistant, and is an ideal industrial floor for new energy vehicles, electronics and chemical workshops, food factories, pharmaceutical factories, airports, hospitals, etc. Material.

Description

Solvent-free polyurethane floating color sand self-leveling terrace material and preparation method thereof

Technical Field

The invention relates to the technical field of polyurethane terrace materials, in particular to a solvent-free polyurethane floating color sand self-leveling terrace material and a preparation method thereof.

Background

Along with continuous iterative updating of science and technology, the requirements of modern industry on terrace materials are more and more severe, and especially new energy automobiles, electronics, medical treatment, food, chemical industry and the like are more and more improved; the floor is required to be dust-free, skid-proof, high in compression resistance and mechanical abrasion resistance, free of volatile harmful substances, excellent in corrosion resistance, flat, comfortable and dirt-resistant, and has certain decorative performance. Meanwhile, under the dual pressures of working rhythm and industry competition, the requirements of modern industry on the construction efficiency of the terrace are higher and higher, so that the terrace with simple construction, rapid molding and high application efficiency is put into use, and the terrace becomes a popular choice. Therefore, the high-end terrace material which can combine the requirements of the modern industry on the terrace material and can be rapidly formed and put into use is necessarily quite desirable.

The colored sand terrace material is a terrace material which is formed by freely matching resin with colored sand with different colors and has bright and colorful colors, and has great decoration. Although the epoxy resin sand pressing terrace has good decorative effect and can resist heavy load, the construction process is complex, the steps are complex, the construction efficiency is low, and the performance is obviously affected in the application environment of high temperature, high humidity, organic acid and alkali corrosion. The epoxy floating color sand self-leveling material has better decorative effect and one-time construction molding due to the addition of the resin floating color sand with more bright color, and solves the problem of low construction efficiency of the epoxy sand pressing color sand terrace, but the terrace material is still difficult to apply in the severe environment for a long time due to the fact that the matrix resin is still epoxy resin.

CN115010403 discloses a kind of self-leveling mortar of floating color sand of water-based polyurethane and its preparation process, compared with the self-leveling material of ordinary water-based polyurethane mortar, although melamine resin floating color sand is added for decoration, and the self-leveling mortar has the properties of high temperature resistance, high humidity resistance, organic acid resistance, alkali resistance, etc. of polyurethane, but because the system is a complex of water-based polyurethane and cement mortar, its heavy load resistance, compression resistance and dirt resistance are greatly reduced. Moreover, the addition amount of the floating colored sand is very low, the terrace material is difficult to show the texture of the colored sand terrace, and the decorative performance of the colored sand is rapidly reduced. Zhou Dunbai, jiang Chen and Li Guorong realize the preparation and construction of the polyurethane color sand terrace in the polyurethane color sand terrace published by surface coating, and have good decorative property of color sand, but are sand pressing terraces, and the construction process is complex and low in efficiency. CN111187566a discloses a solvent-free self-leveling polyurethane wear-resistant material and a preparation method thereof, which have good wear resistance and dirt resistance, and good chemical resistance of polyurethane, but have short operation time, cannot be thick-coated, have scratch resistance of only 2H, and cannot provide good decorative effect of floating colored sand terrace. Once scratched, worn or stained, significantly affects its decorative function and life. To ensure its decorative properties and to extend its life, it is generally recommended to cover its surface with a transparent polyurethane finish, which in turn increases the number of construction steps and extends the construction time.

In conclusion, the solvent-free polyurethane floating color sand self-leveling floor material with good construction property, decoration property, compression resistance, wear resistance, scratch resistance and dirt resistance and good chemical resistance and high and low temperature resistance is worth focusing.

Disclosure of Invention

The invention aims to solve the problems and provide a solvent-free polyurethane floating color sand self-leveling floor material and a preparation method thereof.

The invention realizes the above purpose through the following technical scheme:

a solvent-free polyurethane floating color sand self-leveling terrace material comprises a component A, a component B, a component C and a component D; the mass ratio of each component is as follows: component A: and the component B: component C: component d=1 to 1.5:0.5 to 1:0.3 to 0.6:0.3 to 0.6;

the component A comprises the following materials in parts by weight: 20 to 30 parts by weight of branched polyether/polyester polyol, 10 to 20 parts by weight of refined castor oil, 5 to 10 parts by weight of modified castor oil, 0.2 to 0.5 part by weight of wetting agent, 0.5 to 0.8 part by weight of dispersing agent, 0.4 to 0.8 part by weight of leveling agent, 0.3 to 0.6 part by weight of defoaming agent, 8 to 12 parts by weight of water scavenger, 60 to 80 parts by weight of filler and 2 to 4 parts by weight of pigment; the component B comprises the following materials in parts by weight: 15-25 parts by weight of a modified substance of branched polyether/polyester polyol p-diphenylmethane diisocyanate and 30-50 parts by weight of polymethylene polyphenyl isocyanate; the component C comprises the following materials in parts by weight: 25-40 parts by weight of resin floating color sand; the component D comprises the following materials in parts by weight: 25-40 parts by weight of quartz sand.

Further, the branched polyether/polyester polyol in the component A is one or more of Basoff Sovermol 750, sovermol760, sovermol815 and Sovermol1092, and the hydroxyl value is 200-400;

refined castor oil is a commercial industrial product with a hydroxyl value of 150-175;

the modified castor oil is Italian ampelopsis root H-31, has a hydroxyl value of 157-170 and a viscosity of lower than 40mPa.s at 25 ℃;

the water scavenger is commercial high-activity nano zeolite powder; preferably zhengzhou superlong nanomaterial CR-1274;

the filler is one or more of 600-2000 meshes of aluminum oxide, aluminum hydroxide, silicon micropowder, calcium carbonate and mineral barium sulfate;

the dispersant is one or more of BYK-P104S, BYK-2151, BYK-163, BYK-9076 and BYK-9011; the wetting agent is one or more of BYK-349 and BYK-3455; the leveling agent is BYK-354; the defoamer is one or more of BYK-054 and BYK-066N, BYK-1794.

The pigment is a commercially available polyurethane pigment.

The further scheme is that branched polyether/polyester polyol is added to the component B to modify diphenylmethane diisocyanate to obtain a modified product, wherein the branched polyether/polyester polyol is one or more of Sovermol 750, sovermol760, sovermol815 and Sovermol 1092; the diphenylmethane diisocyanate is WANNATE MDI-50; the polymethylene polyphenyl isocyanate is one or more of WANNATE PM-200 and WANNATE PM-400.

The preparation method of the modifier comprises the following steps: uniformly mixing branched polyether/polyester polyol and diphenylmethane diisocyanate according to the weight ratio of 1:4-10, heating to 70-90 ℃ in a reaction kettle with nitrogen protection, and stirring for reacting for 1-1.5 h; and cooling after the reaction is finished to obtain a modified product.

Further adopts the scheme that the component C is dried PMMA resin color sand particles with the particle diameter of 200-400 microns and the density of 1.1-1.2 g/cm ³ The color includes red, orange, yellow, green, blue, indigo, violet, etc.

Further, the component D is dry 100-400 mesh quartz sand particles, preferably 140-280 mesh quartz sand particles.

The invention also provides a preparation method of the solvent-free polyurethane floating color sand self-leveling floor material, which comprises the following steps:

step 1, preparing a group A material: adding branched polyether/polyester polyol, refined castor oil, modified castor oil, wetting agent, dispersing agent, water removing agent, filler and pigment filler into a vacuum high-speed stirring and dispersing machine according to the formula proportion, stirring and mixing at room temperature for at least 30 minutes in vacuum, adding flatting agent and defoaming agent, stirring and mixing at room temperature for at least 30 minutes in vacuum, discharging bubbles, sealing and packaging to obtain a group A material; the filler is subjected to water removal treatment by drying at least 1 hour at 120 ℃ in advance and is used after being cooled;

step 2, preparing a group B material: uniformly mixing branched polyether/polyester polyol and diphenylmethane diisocyanate according to the weight ratio of 1:4-10, heating to 70-90 ℃ in a reaction kettle with nitrogen protection, and stirring for reacting for 1-1.5 h; cooling after the reaction is finished to obtain a modified substance; adding polymethylene polyphenyl isocyanate into the modified substance according to the formula proportion under the stirring condition, mixing for 0.5h, and sealing and packaging to obtain a component B;

step 3, preparing a material of group C: dry-mixing PMMA resin color sand with a selected color, and sealing and packaging to obtain a component C;

step 4, preparing a group D material: sealing and packaging the dried quartz sand to obtain a component D;

step 5, when in use, the component A, the component B, the component C and the component D are prepared from the following components in parts by weight: and the component B: component C: component d=1 to 1.5:0.5 to 1:0.3 to 0.6: and (3) mechanically and uniformly mixing the materials to obtain the solvent-free polyurethane floating color sand self-leveling floor material.

The invention has the beneficial effects that:

the solvent-free polyurethane floating color sand self-leveling floor material realizes one-time thick coating molding of the solvent-free polyurethane self-leveling material, and has colorful resin color sand decoration; the highest construction thickness of the terrace material can reach 3 mm, the solidification is fast, the efficiency is high, and pedestrians can be obtained after construction for 24 hours at 25 ℃; after solidification, the material forms a resin colored sand 'floating sand' upper surface layer with strong texture and a composite lower layer structure of polyurethane resin and filler from top to bottom, so that the terrace has high compression resistance, wear resistance, scratch resistance, corrosion resistance, dirt resistance, easy cleaning, good decoration and durability.

1) The invention adopts the unique high-activity nano zeolite powder as the water absorbent, and adjusts the dosage thereof through a large number of experiments, so that not only can the trace moisture introduced into each component in the production and storage processes be removed, but also the foaming problem caused by the contact of the terrace material with the adhesion surface and trace moisture in the air in the thick coating curing process can be avoided; even in summer with high temperature and high humidity, the solidification process is not easy to foam, the one-time molding is realized, and the solidification is fast, simple and efficient. The pain point that the solvent-free polyurethane self-leveling material is difficult to thick coat is solved, so that the solvent-free polyurethane self-leveling color sand is possible to be prepared by adding the resin color sand.

2) According to the invention, lighter PMMA resin color sand is selected as a decorative material, and can quickly float to the surface before the solvent-free polyurethane material gels, so that a floating sand upper surface layer with strong texture is formed, and excellent decorative performance is provided.

3) The invention introduces the low-viscosity and low-reactivity Italian ampelopsis grossedentata H-31 to reduce the viscosity of the whole material after mixing, slow down the reaction speed, prolong the gel time and provide favorable conditions for the resin color sand floating.

4) The invention adopts branched polyether/polyester polyol to modify diphenylmethane diisocyanate, and then blends and modifies with polymethylene polyphenyl isocyanate to increase the crosslinking density of polyurethane, so that the terrace material has high hardness, compressive strength, scratch resistance and the like; meanwhile, the viscosity of the whole material after mixing is reduced, and the resin color sand is helped to float up quickly to achieve the expected effect.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.

Example 1:

the solvent-free polyurethane floating color sand self-leveling floor material comprises the following components in parts by weight:

component A:

and the component B:

sovermol815 4 parts

20 parts of diphenylmethane diisocyanate

40 parts of polymethylene polyphenyl isocyanate

Component C:

27 parts of white resin color sand (300 microns)

3 parts of black resin color sand (300 microns)

And the component D:

30 parts of quartz sand (140-280 meshes)

The component A, the component B, the component C and the component D are prepared according to the following weight ratio of 1:0.6:0.5:: and (3) uniformly mixing the materials in a proportion of 0.5 to obtain the solvent-free polyurethane floating color sand self-leveling floor material.

Example 2:

the solvent-free polyurethane floating color sand self-leveling floor material comprises the following components in parts by weight:

component A:

and the component B:

750 parts of Sovermol

18 parts of benzhydryl diisocyanate

48 parts of polymethylene polyphenyl isocyanate

Component C:

12 parts of white resin color sand (400 microns)

18 parts of light green resin color sand (400 microns)

And the component D:

30 parts of quartz sand (140-280 meshes)

The component A, the component B and the component C are prepared according to the following proportion of 1:0.7:0.5: and (3) uniformly mixing the materials in a proportion of 0.5 to obtain the solvent-free polyurethane floating color sand self-leveling floor material.

Example 3:

the solvent-free polyurethane floating color sand self-leveling floor material comprises the following components in parts by weight:

component A:

and the component B:

sovermol760 4 parts

18 parts of benzhydryl diisocyanate

45 parts of polymethylene polyphenyl isocyanate

Component C:

15 parts of white resin color sand (300 microns)

15 parts of blue resin color sand (300 microns)

And the component D:

30 parts of quartz sand (100-240 meshes)

The component A, the component B and the component C are prepared according to the following proportion of 1:0.7:0.5: and (3) uniformly mixing the materials in a proportion of 0.5 to obtain the solvent-free polyurethane floating color sand self-leveling floor material.

Example 4:

the solvent-free polyurethane floating color sand self-leveling floor material comprises the following components in parts by weight:

component A:

and the component B:

sovermol 1092.4 parts

18 parts of benzhydryl diisocyanate

45 parts of polymethylene polyphenyl isocyanate

Component C:

12 parts of white resin color sand (300 microns)

18 parts of orange resin color sand (300 microns)

And the component D:

30 parts of quartz sand (100-240 meshes)

The components A, B, C and D are mixed according to the proportion of 1.0:0.6:0.5: and (3) uniformly mixing the materials in a proportion of 0.5 to obtain the solvent-free polyurethane floating color sand self-leveling floor material.

The resin color sand of the component C in the examples 1 to 4 can be matched with the required color according to the visual effect requirement.

Comparative example

Commercially available solvent-free polyurethane self-leveling floor materials.

The concrete construction method comprises the following steps:

and (one) basal surface treatment:

polishing the whole ground by adopting a dust-free polisher to remove impurities, and cleaning; firstly, cutting the ground damaged and shelled areas in order, and then repairing the ground damaged and shelled areas to be flush with the surrounding by adopting epoxy mortar; checking flatness of the whole basal plane, and adopting a high-grinding low-compensation mode to enable the basal plane height difference to accord with 2m guiding ruler +/-2 mm; cleaning.

And (II) under-coating:

and the capillary holes of the integral terrace are sealed by adopting epoxy resin primer, and the attention is paid to avoiding accumulation and missing coating.

And (III) mortar:

and (3) constructing an epoxy mortar material on the integral terrace, increasing the flatness of the terrace, and controlling the construction thickness. After solidification, polishing and leveling and cleaning.

And (IV) intercoat:

and scraping the construction intermediate coating material on the integral terrace by adopting a toothless trowel.

And (fifth) a top coating:

the solvent-free polyurethane floating color sand self-leveling floor materials prepared in the proportion in examples 1 to 4 are scraped by a sawtooth trowel, and then are treated at least twice by a defoaming roller in a cross manner. Performance test:

the performance test of examples 1 to 4 and comparative examples was carried out according to GB/T22374-2018, and the test results are shown in Table 1;

table 1 shows the performance test results of the floor materials of examples 1 to 4 and comparative examples.

The branched polyether/polyester polyol modified diphenylmethane diisocyanate is introduced into the terrace material and is blended with the polymethylene polyphenyl isocyanate, so that the crosslinking density of polyurethane is increased, and the terrace has high hardness and high compressive strength; meanwhile, the monofunctional low-viscosity H-31 reduces the viscosity of the whole material after mixing and slows down the reaction speed, thereby providing favorable conditions for the floating of the color sand; the color sand of the lighter PMMA resin is added, so that the color of a solvent-free polyurethane self-leveling terrace system is enriched, the decoration of the system is greatly improved, the pencil hardness (scratch resistance) of a polyurethane terrace is remarkably improved to 4-5H, which is difficult to reach for a common polyurethane self-leveling terrace; the abrasion resistance of the terrace is only 4-10 mg under the condition of 750g/500 r, which is equivalent to the high abrasion-resistant polyurethane material of the patent CN106893380A, but has extremely high decorative property and high compressive strength.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.

Claims (7)

1. The solvent-free polyurethane floating color sand self-leveling floor material is characterized by comprising a component A, a component B, a component C and a component D; the mass ratio of each component is as follows: component A: and the component B: component C: component d=1 to 1.5:0.5 to 1:0.3 to 0.6:0.3 to 0.6;

the component A comprises the following materials in parts by weight: 20 to 30 parts by weight of branched polyether/polyester polyol, 10 to 20 parts by weight of refined castor oil, 5 to 10 parts by weight of modified castor oil, 0.2 to 0.5 part by weight of wetting agent, 0.5 to 0.8 part by weight of dispersing agent, 0.4 to 0.8 part by weight of leveling agent, 0.3 to 0.6 part by weight of defoaming agent, 8 to 12 parts by weight of water scavenger, 60 to 80 parts by weight of filler and 2 to 4 parts by weight of pigment; the component B comprises the following materials in parts by weight: 15-25 parts by weight of a modified substance of branched polyether/polyester polyol p-diphenylmethane diisocyanate and 30-50 parts by weight of polymethylene polyphenyl isocyanate; the component C comprises the following materials in parts by weight: 25-40 parts by weight of resin floating color sand; the component D comprises the following materials in parts by weight: 25-40 parts by weight of quartz sand.

2. The solvent-free polyurethane floating color sand self-leveling floor material according to claim 1, wherein the branched polyether/polyester polyol in the component A is one or more of Basoff Sovermol 750, sovermol760, sovermol815 and Sovermol1092, and has a hydroxyl value of 200-400; the hydroxyl value of the refined castor oil is 150-175; the modified castor oil is Italian ampelopsis root H-31 with a hydroxyl value of 157-170; the water scavenger is high-activity nano zeolite powder; the filler is one or more of 600-2000 meshes of aluminum oxide, aluminum hydroxide, silicon micropowder, calcium carbonate and mineral barium sulfate; the dispersant is one or more of BYK-P104S, BYK-2151, BYK-163, BYK-9076 and BYK-9011; the wetting agent is one or more of BYK-349 and BYK-3455; the leveling agent is BYK-354; the defoamer is one or more of BYK-054 and BYK-066N, BYK-1794.

3. The solvent-free polyurethane floating color sand self-leveling floor material according to claim 1, wherein branched polyether/polyester polyol is added to the component B to modify diphenylmethane diisocyanate to obtain a modified product, wherein the branched polyether/polyester polyol is one or more of Sovermol 750, sovermol760, sovermol815 and Sovermol 1092; the diphenylmethane diisocyanate is WANNATE MDI-50; the polymethylene polyphenyl isocyanate is one or more of WANNATE PM-200 and WANNATE PM-400.

4. The solvent-free polyurethane floating color sand self-leveling floor material as claimed in claim 1 or 3, wherein the preparation method of the modifier is as follows: uniformly mixing branched polyether/polyester polyol and diphenylmethane diisocyanate according to the weight ratio of 1:4-10, heating to 70-90 ℃ in a reaction kettle with nitrogen protection, and stirring for reacting for 1-1.5 h; and cooling after the reaction is finished to obtain a modified product.

5. The solvent-free polyurethane floating color sand self-leveling floor material as claimed in claim 1, wherein the component C is dry PMMA resin color sand particles with the particle size of 200-400 microns and the density of 1.1-1.2 g/cm ³ 。

6. The solvent-free polyurethane floating color sand self-leveling floor material as claimed in claim 1, wherein the component D is dry 100-400 mesh quartz sand particles or 140-280 mesh quartz sand particles.

7. The preparation method of the solvent-free polyurethane floating color sand self-leveling floor material is characterized by comprising the following steps of:

step 1, preparing a group A material: adding branched polyether/polyester polyol, refined castor oil, modified castor oil, wetting agent, dispersing agent, water removing agent, filler and pigment filler into a vacuum high-speed stirring and dispersing machine according to the formula proportion, stirring and mixing at room temperature for at least 30 minutes in vacuum, adding flatting agent and defoaming agent, stirring and mixing at room temperature for at least 30 minutes in vacuum, discharging bubbles, sealing and packaging to obtain a group A material; the filler is subjected to water removal treatment by drying at least 1 hour at 120 ℃ in advance and is used after being cooled;

step 2, preparing a group B material: uniformly mixing branched polyether/polyester polyol and diphenylmethane diisocyanate according to the weight ratio of 1:4-10, heating to 70-90 ℃ in a reaction kettle with nitrogen protection, and stirring for reacting for 1-1.5 h; cooling after the reaction is finished to obtain a modified substance; adding polymethylene polyphenyl isocyanate into the modified substance according to the formula proportion under the stirring condition, mixing for 0.5h, and sealing and packaging to obtain a component B;

step 3, preparing a material of group C: dry-mixing PMMA resin color sand with a selected color, and sealing and packaging to obtain a component C;

step 4, preparing a group D material: sealing and packaging the dried quartz sand to obtain a component D;

step 5, when in use, the component A, the component B, the component C and the component D are prepared from the following components in parts by weight: and the component B: component C: component d=1 to 1.5:0.5 to 1:0.3 to 0.6: and (3) mechanically and uniformly mixing the materials to obtain the solvent-free polyurethane floating color sand self-leveling floor material.