CN102807813A - Waterborne polyurethane floor paint - Google Patents

Abstract

The invention discloses a water-based polyurethane floor paint, especially a two-component water-based polyurethane floor paint. The floor paint is composed of a main paint and a curing agent. The main paint contains a water-soluble hydroxyl resin. The curing agent is a water-soluble isocyanate-containing polymer. The present invention finds a water-soluble hydroxyl-containing resin to be used for making paints. When in use, it is combined with a water-soluble isocyanate-containing polymer to form a paint film with a three-dimensional network structure through chemical reactions. , so as to obtain a two-component water-based polyurethane floor paint with excellent physical and chemical properties. The two-component water-based polyurethane floor paint, through the condensation reaction of active groups in the two components, is cross-linked to form a film, thereby improving the cross-linking density of the paint film, making the paint film high in hardness and wear-resistant The physical and chemical properties are significantly improved.

Description

Waterborne polyurethane floor paint

technical field

The invention relates to a water-based polyurethane floor paint, in particular to a two-component water-based polyurethane floor paint.

Background technique

At present, most of the technical solutions for waterborne polyurethane flooring products are to synthesize polyurethane resin first, and then emulsify and disperse it in water, which belongs to one-component technology. Since the existing technology is to synthesize water-based polyurethane resin into macromolecules, and then emulsify and dissolve it in water, when used, it will be cross-linked with the volatilization of water to form a film, and the cross-link density is not high. The physical and chemical properties of the floor made of this resin Not good, the hardness of the paint film is generally not high, and the solvent resistance and abrasion resistance are not strong.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a kind of water-based polyurethane floor paint with high film hardness and excellent physical and chemical properties such as wear resistance and weather resistance.

In order to achieve the above object, the technical solution adopted by the present invention is: a water-based polyurethane floor paint, which is composed of a main paint and a curing agent, the main paint contains a water-soluble hydroxyl resin, and the curing agent is a water-soluble Polymers containing isocyanates.

The existing one-component water-based polyurethane is not suitable for high-quality floor paint due to its insufficient physical and chemical properties such as hardness and wear resistance. The starting point of the present invention is to find a kind of water-based hydroxyl-containing resin and a water-soluble isocyanate-containing polymer, and use them to make paint, thereby obtaining a two-component water-based polyurethane floor paint with excellent performance, effectively improving the product quality. Physical and chemical properties such as hardness, wear resistance and weather resistance.

The water-based polyurethane floor paint of the present invention finds a water-soluble hydroxyl-containing resin for paint making, and cooperates with a water-soluble isocyanate-containing polymer during use, and is cross-linked by a chemical reaction to form A paint film with a three-dimensional network structure, so as to obtain a two-component waterborne polyurethane floor paint with excellent physical and chemical properties. The two-component water-based polyurethane floor paint, through the condensation reaction of active groups in the two components, is cross-linked to form a film, thereby improving the cross-linking density of the paint film, making the paint film high in hardness and wear-resistant The physical and chemical properties are significantly improved.

As a preferred embodiment of the waterborne polyurethane floor paint of the present invention, the main paint contains the following components by weight:

As a preferred embodiment of the water-based polyurethane floor paint of the present invention, the wetting agent is at least one of alkylphenol polyoxyethylene ether and polyoxyethylene modifier; the dispersant is polyacrylic acid potassium salt , at least one of polyacrylic acid sodium salt; the defoamer is at least one of mineral oil, organic silicon dioxide modifier, silicone defoamer; the pigment is titanium dioxide, titanium yellow, At least one of phthalocyanine blue; the filler is mineral stone powder and talcum powder. At least one of heavy calcium, quartz powder, and glass powder; the preservative is at least one of Cathone and paraben esters; the rheology modifier is polyurethane rheology agent, associative acrylic acid At least one of polymers; the surface modifier is at least one of fluorine-containing modified polyethylene wax and modified dimethylsiloxane.

As a more preferred embodiment of the waterborne polyurethane floor paint of the present invention, the defoamer is a silicone defoamer; the filler is at least one of quartz powder and glass powder. Adding a strong defoamer silicone defoamer to the main paint can quickly discharge the carbon dioxide produced by the reaction between the isocyanate of the curing agent and water and break the foam. Adding quartz powder and glass powder with better wear resistance to the main paint as fillers can further improve the wear resistance of the product.

The water-based polyurethane floor paint of the present invention is cross-linked into a film through further chemical reaction of the reactive groups of the two components, and has a high cross-linking density, so that the paint film has high hardness and excellent physical and chemical properties such as wear resistance. The reaction during film formation is as follows:

The first reaction is the main reaction, which is the reaction between the main paint resin and the curing agent resin. The main resin in the main paint must be a resin with a hydroxyl group, and it is hydrophilic, and it is dispersed through emulsification to make a water-based resin. The curing agent resin is formed by polymerization of isocyanate monomers, and then accesses some hydrophilic phases. Since the reactive groups of the curing agent are three-dimensionally distributed, and the main paint resin has more than one reactive group, a three-dimensional network structure with criss-cross chemical chains will be formed after the reaction, which will improve the performance of the paint film.

The second reaction is that the isocyanate of the curing agent reacts with water to produce amino resin and carbon dioxide. If the carbon dioxide is not discharged in time, it will affect the appearance and performance of the paint film. A strong defoamer, ketone defoamer, is added to the main paint, so that the carbon dioxide produced by the reaction can be quickly released and the foam can be broken. Amino resin reacts with isocyanate to form urea resin.

As a preferred embodiment of the water-based polyurethane floor paint of the present invention, the water-soluble hydroxyl resin is at least one of anionic polyacrylic acid dispersion and polyester polyurethane dispersion.

As a preferred embodiment of the waterborne polyurethane floor paint of the present invention, the curing agent is at least one of sulfamate-modified HDI trimer and sulfamate-modified IPDI trimer.

As a preferred embodiment of the waterborne polyurethane floor paint of the present invention, when used, the weight ratio of the main paint to the curing agent is 5:1.

There are no groups that are easily decomposed by ultraviolet rays in the water-soluble resin, and the water-soluble curing agent is synthesized from monomers with excellent weather resistance, so that the cured paint film has excellent weather resistance.

The two-component water-based polyurethane floor paint of the present invention has optimized water-based resin and curing agent, thereby ensuring excellent physical and chemical properties; the curing agent synthesized by isocyanate monomers with excellent weather resistance is adopted, and the water-based hydroxyl-containing resin used in the main paint In order to avoid the introduction of groups with poor weather resistance, the weather resistance of the product is further improved. Compared with existing products, the water-based polyurethane floor paint of the present invention has better physical and chemical properties such as hardness, abrasion resistance, and weather resistance.

Detailed ways

In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific examples.

Example 1

A kind of embodiment of waterborne polyurethane floor paint of the present invention, described floor paint contains the component of following parts by weight:

Main paint: water-soluble hydroxyl resin: 40 parts of anionic polyacrylate dispersion

Wetting agent: 0.3 parts of alkylphenol polyoxyethylene ether

Dispersant: 0.4 parts of potassium polyacrylate

Defoamer: 0.3 parts of mineral oil

Pigment: 15 parts of titanium dioxide

Filler: 25 parts of mineral stone powder

Preservative: 0.2 parts of Kasong

Rheology modifier: 0.3 parts of polyurethane rheology agent

Surface modifier: 0.5 part of fluorine-containing modified polyethylene wax.

Curing agent: 16.4 parts of sulfamate-modified HDI trimer.

When using, mix the main paint and curing agent evenly.

In this embodiment, when used, the weight ratio of the main paint to the curing agent is 5:1.

Example 2

A kind of embodiment of waterborne polyurethane floor paint of the present invention, described floor paint contains the component of following parts by weight:

Main paint: water-soluble hydroxyl resin: 50 parts of polyester polyurethane dispersion

Wetting agent: 0.6 parts of polyoxyethylene modifier

Dispersant: 0.3 parts of polyacrylic acid sodium salt

Defoamer: 0.6 parts of organosilica modifier

Pigment: 10 parts of titanium yellow

Filler: 30 parts of talcum powder

Preservatives: 0.1 parts of parabens

Rheology modifier: 0.6 parts of associative acrylic polymer

Surface modifier: 0.3 parts of modified dimethylsiloxane.

Curing agent: 18.5 parts of sulfamate-modified IPDI trimer.

When using, mix the main paint and curing agent evenly.

In this embodiment, when used, the weight ratio of the main paint to the curing agent is 5:1.

Example 3

A kind of embodiment of waterborne polyurethane floor paint of the present invention, described floor paint contains the component of following parts by weight:

Main paint: water-soluble hydroxyl resin: 45 parts of anionic polyacrylate dispersion

Wetting agent: 0.5 parts of polyoxyethylene modifier

Dispersant: 0.6 parts of sodium polyacrylic acid

Defoamer: 0.5 parts of organosilica modifier

Pigment: 20 parts of phthalocyanine blue

Filling: 20 parts of heavy calcium

Preservative: 0.1 parts of Kasong

Rheology modifier: 0.6 parts of associative acrylic polymer

Surface modifier: 0.2 part of fluorine-containing modified polyethylene wax.

Curing agent: 17.5 parts of sulfamate-modified HDI trimer.

When using, mix the main paint and curing agent evenly.

In this embodiment, when used, the weight ratio of the main paint to the curing agent is 5:1.

Example 4

A kind of embodiment of waterborne polyurethane floor paint of the present invention, described floor paint contains the component of following parts by weight:

Main paint: water-soluble hydroxyl resin: 20 parts of anionic polyacrylate dispersion, 42 parts of polyester polyurethane dispersion

Wetting agent: 0.4 parts of alkylphenol polyoxyethylene ether

Dispersant: 0.6 parts of potassium polyacrylate

Defoamer: 0.6 parts of silicone defoamer

Pigment: 10 parts of titanium dioxide, 8 parts of phthalocyanine blue

Filler: 20 parts of quartz powder, 6 parts of glass powder

Preservatives: 0.1 parts of parabens

Rheology modifier: 0.4 parts of polyurethane rheology agent

Surface modifier: 0.5 parts of modified dimethylsiloxane.

Curing agent: 17.7 parts of sulfamate-modified IPDI trimer.

When using, mix the main paint and curing agent evenly.

In this embodiment, when used, the weight ratio of the main paint to the curing agent is 5:1.

Example 5

The water-based polyurethane floor paint described in Examples 1-4 is used as the invention group, and the following existing products are used as the control group.

A kind of polyurethane floor paint in existing product, comprises the component of following parts by weight:

3.9 parts of water

Antifreeze: PG 1.5 parts

Auxiliary dispersant: AMP 950 0.18 parts

Wetting agent: BYK 154 0.39 parts

Dispersant: BYK 181 0.39 parts

Defoamer: BYK 024 0.3 parts

Rheology agent: RHEOLATE 288 0.2 parts

Pigment: R-706 21.94 parts

Film former: PUD polyurethane resin 64.1 parts

Filler: COASOL 2.5 parts

Substrate wetting agent: TEGO KL 245 0.2 parts

Defoamer: BYK 025 0.1 parts

Rheology agent: RHEOLATE 288 0.2 parts

Antifungal agent: BIOX AA 148 1 part

Preservative: BIOX VFB1 0.2 parts

Water 2.9 parts.

The floor paint of the invention group and the control group were used to make boards respectively, and their performance was tested by the same method. The results are shown in Table 1.

Table 1

As can be seen from Table 1, compared with the control group, the water-based polyurethane floor paint of the invention group has better physical and chemical properties such as hardness, abrasion resistance, acid and alkali resistance and weather resistance.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that The technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims (7)

1. an aqueous polyurethane terrace lacquer is characterized in that, is combined by main lacquer and solidifying agent, contains the water soluble hydroxy resin in the said main lacquer, and said solidifying agent is the polymkeric substance that water-soluble contains isocyano.

2. aqueous polyurethane terrace lacquer as claimed in claim 1 is characterized in that, said main lacquer contains the component of following weight part:

3. aqueous polyurethane terrace as claimed in claim 2 lacquer is characterized in that, said wetting agent is at least a in TX10, the T 46155 properties-correcting agent; Said dispersion agent is at least a in ROHM sylvite, the polyacrylic acid sodium salt; Said skimmer is at least a in the MO, organic silica modified dose, silicone skimmer; Said pigment is at least a in white titanium pigment, titan yellow, the phthalocyanine blue; Said filler is mineral stone flour, talcum powder.At least a in coarse whiting, silica powder, the glass powder; At least a in card pine, the parabens of said sanitas; Said rheology modifier is at least a in urethane rheological agent, the association type XPA; Said surface-modifying agent is at least a in the dimethyl siloxane of fluorine-containing modified polyethylene wax, modification.

4. aqueous polyurethane terrace lacquer as claimed in claim 3 is characterized in that said skimmer is the silicone skimmer; Said filler is at least a in silica powder, the glass powder.

5. according to claim 1 or claim 2 aqueous polyurethane terrace lacquer is characterized in that, said water soluble hydroxy resin is at least a in anionic polyacrylate dispersion, the polyester polyurethane dispersions.

6. according to claim 1 or claim 2 aqueous polyurethane terrace lacquer is characterized in that, said solidifying agent is at least a in the IPDI tripolymer of HDI tripolymer, sulfamate modification of sulfamate modification.

7. according to claim 1 or claim 2 aqueous polyurethane terrace lacquer is characterized in that during use, said main lacquer is 5:1 with the weight ratio of solidifying agent.