阅读说明：本技术 一种可降低哮喘和过敏产生的水性涂料组合物 (Water-based paint composition capable of reducing asthma and allergy ) 是由 李�浩 孙伟 于 2019-01-08 设计创作，主要内容包括：本发明提供了一种可降低哮喘和过敏产生的水性涂料组合物。具体地,本发明提供了一种涂料组合物,该组合物包括：30～45重量份的成膜物质；25～40重量份的颜填料；0.5～2.0重量份的防冻剂；和2～7重量份的涂料助剂；其中,所述涂料助剂包括：0.3～1.5重量份的润湿分散剂；和0.5～3重量份的增稠剂；所述成膜物质为共聚乳液。本发明的涂料组合物具有较低气味,游离甲醛和VOC未检出,且在干燥过程中不会释放刺激性有害物质,不会引起或诱发过敏和哮喘,是一款环境友好型产品。(The present invention provides a water-based coating composition that reduces the development of asthma and allergies. Specifically, the present invention provides a coating composition comprising: 30-45 parts by weight of a film-forming substance; 25-40 parts by weight of pigment and filler; 0.5-2.0 parts by weight of an anti-freezing agent; and 2-7 parts by weight of a coating additive; wherein the coating auxiliary agent comprises: 0.3-1.5 parts by weight of a wetting dispersant; and 0.5-3 parts by weight of a thickener; the film-forming material is a copolymer emulsion. The coating composition has low odor, free formaldehyde and VOC are not detected, irritant harmful substances are not released in the drying process, allergy and asthma are not caused or induced, and the coating composition is an environment-friendly product.)

1. A coating composition, characterized in that the composition comprises:

30-45 parts by weight of a film-forming substance;

25-40 parts by weight of pigment and filler;

0.5-2.0 parts by weight of an anti-freezing agent; and

2-7 parts by weight of a coating additive;

wherein the coating auxiliary agent comprises: 0.3-1.5 parts by weight of a wetting dispersant; and 0.5-3 parts by weight of a thickener; the film-forming material is a copolymer emulsion.

2. The composition of claim 1, wherein the co-emulsion has one or more of the following characteristics:

the particle size distribution of the copolymerization emulsion is 100-150 nm;

the minimum film forming temperature MFFT of the copolymerization emulsion is 0-7 ℃;

the solid content of the copolymerization emulsion is 45 to 50 weight percent;

the copolymer emulsion is acrylic copolymer emulsion.

3. The composition of claim 1, wherein the copolymer emulsion is a self-crosslinking copolymer emulsion.

4. The composition of claim 1, wherein the thickener is selected from the group consisting of: a cellulosic thickener, a polyurethane thickener, an alkali swellable thickener, an inorganic bentonite thickener, or a combination thereof.

5. The composition of claim 4, wherein the thickener is a combination of a urethane thickener and an inorganic thickener (e.g., bentonite); or a combination of a urethane thickener and a cellulose thickener.

6. The composition of claim 1, wherein the coating adjuvant further comprises: antifoam agents, pH adjusters, mildewcides, and/or preservatives.

7. A method of preparing the composition of claim 1, comprising the steps of:

(1) providing the components of the composition of claim 1 in a ratio; and

(2) mixing to obtain the coating composition.

8. A coating formed by applying the composition of claim 1 to a substrate.

9. An article, characterized in that the article comprises: a substrate; and a coating as claimed in claim 8.

10. A method of application, comprising the steps of: a) optionally diluting the latex paint composition of claim 1 to a coating viscosity; b) and coating the wall surface with the diluted coating.

Technical Field

The invention belongs to the field of coatings, and particularly relates to a latex paint composition capable of reducing asthma and allergy.

Background

According to statistics, the incidence rate of various allergies and asthma rises globally in recent years, the number of asthma patients reaches 3 hundred million worldwide, the prevalence rate rises 50% every decade, and more than 10 million people die of asthma every year. About 3000 thousands of asthma patients exist in China, the average prevalence rate is 2.1%, and asthma becomes the second respiratory tract disease in China. However, for various reasons, the building materials are not required in China at present aiming at asthma and allergy, but developed countries in Europe and America or countries with high environmental requirements have correspondingly treated the asthma and allergy, and relevant standards or product certificates are established. However, in conventional coating compositions, various volatile substance-containing auxiliaries, such as film-forming auxiliaries, are required to be added to help the coating to obtain good properties, such as workability and film-forming quality. If the film-forming assistant is not added or the addition amount is too small, the product can not form a film well, a paint film can crack, and the paint film can even fall off from the wall surface seriously.

In view of the above, there is a need in the art to develop a low odor, environmentally friendly aqueous latex paint suitable for asthmatic people and allergic people.

Disclosure of Invention

It is an object of the present invention to provide a latex paint composition which has a low odor, free formaldehyde and no detected VOC, and which does not release irritating harmful substances during drying of the paint film, causing or inducing allergy and asthma, which is a high quality, environmentally friendly product.

In a first aspect of the present invention, there is provided a coating composition comprising:

30-45 parts by weight of a film-forming substance;

25-40 parts by weight of pigment and filler;

0.5-2.0 parts by weight of an anti-freezing agent; and

2-7 parts by weight of a coating additive;

wherein the coating auxiliary agent comprises: 0.3-1.5 parts by weight of a wetting dispersant; and 0.5-3 parts by weight of a thickener; the film-forming material is a copolymer emulsion.

In another preferred embodiment, the composition does not include a coalescent.

In another preferred embodiment, the composition comprises 0 parts by weight of a coalescent.

In another preferred example, the antifreeze is a phosphate antifreeze.

In another preferred embodiment, the composition comprises 1.0-2.0 parts by weight of an antifreezing agent.

In another preferred embodiment, the wetting dispersant is a polycarboxylate-type wetting dispersant.

In another preferred embodiment, the composition comprises 0.8-1.0 part by weight of wetting dispersant.

In another preferred embodiment, the composition further comprises 0-50 parts by weight of water; preferably, 10 to 50 parts by weight of water is included; more preferably, 15 to 40 parts by weight of water is included.

In another preferred embodiment, the PVC (pigment volume concentration) of the composition is 35-60%.

In another preferred embodiment, the copolymer emulsion has one or more of the following characteristics:

the particle size distribution of the copolymer emulsion is 100-150 nm;

the minimum film forming temperature MFFT of the copolymer emulsion is 0-7 ℃;

the solid content of the copolymer emulsion is 45-50 wt%;

the copolymer emulsion is an acrylic copolymer emulsion.

In another preferred embodiment, the copolymer emulsion is a self-crosslinking copolymer emulsion.

In another preferred embodiment, the copolymer emulsion is a neat acrylic copolymer emulsion.

In another preferred embodiment, the residual monomer content in the copolymer emulsion is 100ppm or less.

In another preferred embodiment, the TVOCs (total volatile organic compounds) in the copolymer emulsion is less than or equal to 100 ppm.

In another preferred embodiment, the film-forming material is 9373-M1.

In another preferred embodiment, the thickener is selected from the group consisting of: a cellulosic thickener, a polyurethane thickener, an alkali swellable thickener, an inorganic bentonite thickener, or a combination thereof.

In another preferred embodiment, the thickener is selected from the group consisting of: polyurethane thickeners (i.e., urethane rheology modifiers), inorganic thickeners bentonite, cellulosic thickeners, or combinations thereof.

In another preferred embodiment, the coating auxiliary agent comprises: 1.2-2 parts by weight of a thickener.

In another preferred embodiment, the thickener is a combination of a urethane thickener and an inorganic thickener (such as bentonite); or a combination of a urethane thickener and a cellulose thickener.

In another preferable example, in the thickening agent, the mass ratio of the urethane thickening agent to the inorganic thickening agent is (1-7): 1; preferably, (3-5): 1.

In another preferable example, in the thickening agent, the mass ratio of the urethane thickening agent to the cellulose thickening agent is (1-7): 1; preferably, (3-5): 1.

In another preferred embodiment, the polyurethane thickener is a polyurethane thickener with a solid content of 15-25% (e.g., 20%).

In another preferred embodiment, the polyurethane thickener is colorless and translucent and presents a Newtonian fluid-like polyurethane rheology modifier.

In another preferred embodiment, the coating auxiliary further includes: antifoam agents, pH adjusters, mildewcides, and/or preservatives.

In another preferred embodiment, the coating auxiliary comprises: 0.5-1.3 parts by weight of a defoaming agent; preferably, 0.5 to 1.0 part by weight of a defoaming agent; more preferably, 0.8 to 1.0 part by weight of a defoaming agent.

In another preferred embodiment, the defoaming agent is selected from: silicone based defoamers, mineral oil based defoamers, or combinations thereof. Preferably, the defoaming agent is a silicone-based defoaming agent.

In another preferred embodiment, the coating auxiliary comprises: 0.1-0.50 parts by weight of a pH regulator; preferably, the pH regulator comprises 0.1-0.3 weight part of pH regulator.

In another preferred example, the pH regulator is a silicone pH regulator; preferably BS16 from WACKER.

In another preferred embodiment, the coating auxiliary agent comprises: defoaming agents, pH regulators, mildewproof agents and preservatives; and in the coating auxiliary agent, the mass ratio of the defoaming agent, the pH regulator, the mildew preventive and the preservative is (0.9 +/-0.1): (0.3 +/-0.1): (0.6 +/-0.1).

In another preferred embodiment, the coating auxiliary comprises: 0-1.0 parts by weight of a mildew inhibitor; preferably, 0.1 to 1.0 part by weight of a mold inhibitor; more preferably, 0.2 to 0.4 parts by weight of a mold inhibitor.

In another preferred embodiment, the coating auxiliary comprises: 0 to 1.0 parts by weight of a preservative; preferably, 0.1 to 1.0 part by weight of a preservative; more preferably, 0.5 to 0.7 parts by weight of a preservative.

In another preferred embodiment, the composition comprises 30 to 35 parts by weight of pigment and filler.

In another preferred embodiment, the pigment filler is a pigment, a filler, or a combination thereof.

In another preferred embodiment, the pigment filler comprises 12-25 parts by weight of pigment and 5-23 parts by weight of filler; preferably, 17 to 20 parts by weight of a pigment and 10 to 18 parts by weight of a filler are included.

In another preferred embodiment, the pigment is titanium dioxide; preferably, it is rutile type titanium dioxide.

In another preferred embodiment, the filler is selected from: wollastonite, silica, mica powder, talc, calcined kaolin, nepheline powder, barite powder, coarse whiting, aluminum silicate, diatomaceous earth, or a combination thereof.

In another preferred example, in the filler, the filler includes: 2-5 parts of wollastonite and/or silicon carbide.

In a second aspect of the present invention, there is provided a process for preparing a composition according to the first aspect, comprising the steps of: (1) providing the components of the composition of claim 1 in a ratio; and (2) mixing to obtain the coating composition.

In another preferred example, the step (2) includes the steps of:

(2.1) adding water and stirring (preferably, the stirring speed is 300-500 rpm);

(2.2) adding (preferably sequentially adding) a defoaming agent, a thickening agent (preferably adding a cellulose ether thickening agent or an inorganic thickening agent), a wetting dispersant and stirring (preferably, the stirring speed is 300-500 rpm; and/or the stirring time is 3 +/-1 min) to water;

(2.3) adding the filling pigment (preferably, the filling material and the pigment are added in sequence) into water and stirring (preferably, the stirring speed is 1200-1800 rpm; and/or the stirring time is 15 +/-3 minutes);

(2.4) adding water under stirring (preferably, the stirring speed is 600-800 rpm) and continuing (preferably, the continuing stirring time is 15 +/-3 minutes);

(2.5) adding the film-forming substance and stirring (preferably, stirring is continued for 5 +/-2 minutes);

(2.6) adding a thickener (preferably, a polyurethane thickener) and stirring (preferably, continuing to stir for 3 +/-1 minutes);

(2.7) adding an antifreezing agent and stirring (preferably, continuously stirring for 3 +/-1 minutes);

(2.8) adding (preferably sequentially adding) the mildew preventive and the preservative and stirring (preferably, continuously stirring for 3 +/-1 minutes);

(2.9) adding the defoaming agent and stirring (preferably, the stirring is continued for 2 +/-1 minutes);

(2.10) adding a pH regulator;

(2.11) adding a dispersion medium to adjust to a desired viscosity (100. + -.2 KU), to obtain the coating composition.

In a third aspect of the invention, there is provided a coating formed by coating a composition according to the first aspect on a substrate.

In a fourth aspect of the invention, there is provided an article comprising: a substrate; and a coating as claimed in the third aspect.

In another preferred embodiment, the article further comprises a protective layer coated on the coating.

In a fifth aspect of the present invention, there is provided a method of application comprising the steps of: a) optionally diluting the latex paint composition of the first aspect to a coating viscosity; b) and coating the wall surface with the diluted coating.

It is to be understood that within the scope of the present invention, the above-described features of the present invention and those specifically described below (e.g., in the examples) may be combined with each other to form new or preferred embodiments. Not to be reiterated herein, but to the extent of space.

Detailed Description

The present inventors have conducted extensive and intensive studies. The composition can obtain excellent construction performance and film-forming quality without adding a coating additive (such as a film-forming additive) containing a volatile organic compound, and the conditions of incapability of forming a film, paint film cracking, falling off from a wall surface and the like can be avoided. The composition of the invention has excellent water-proof, alkali-proof and scrubbing-resistant performances and other conventional coating performances, and can not cause or induce asthma and allergy. The present invention has been accomplished based on this.

Term(s) for

As used herein, "latex paint", "coating" are used interchangeably to refer to synthetic resin emulsion coatings.

As used herein, "latex paint composition", "coating composition" are used interchangeably and refer to a composition according to the first aspect of the present invention.

Aqueous latex paint compositions

The invention provides a water-based paint (emulsion paint) composition which comprises the following components in parts by weight: 30-45 parts by weight of a film-forming substance; 25 to 40 (preferably 30 to 35) parts by weight of a filler pigment (preferably, the filler pigment consists of 12 to 25 parts by weight of a pigment and 5 to 23 parts by weight of a filler); 0.5-2.0 parts by weight of an anti-freezing agent; 2-7 parts by weight of a coating additive; and an acceptable amount of water; wherein the paint auxiliary agent is 0.3-0.8 part by weight of wetting dispersant; 0.5-3 (preferably, 1.2-2) parts by weight of a thickening agent, wherein the film-forming material is a copolymer emulsion.

In another preferred example, the thickener is at least one of a cellulose-based thickener, a polyurethane-based thickener, an alkali swelling thickener, an inorganic bentonite thickener, or a combination thereof.

In another preferred embodiment, the thickener is a combination of a polyurethane-based rheology modifier (preferably, 20% solids, colorless, translucent, newtonian fluid-like) and a cellulosic thickener.

In another preferred embodiment, the thickener is a combination of a polyurethane-based rheology modifier (preferably, 20% solids, colorless, translucent, and exhibits a newtonian fluid-like state) and an inorganic thickener, bentonite.

In another preferred embodiment, the coating auxiliary agent comprises: 0.5-1.0 part by weight of defoaming agent, 0.1-0.30 part by weight of pH regulator, 0.4-0.6 part by weight of mildew preventive and/or 0.3-0.5 part by weight of preservative.

In another preferred example, in the paint auxiliary, the mass ratio of the defoaming agent to the thickening agent to the pH adjuster to the mildewproof agent to the preservative is: pH regulator: mildew preventive: the antiseptic is (0.9 + -0.1): (0.3 + -0.1): 0.6 + -0.1.

In another preferred example, the defoaming agent is at least one of silicone defoaming agent, mineral oil defoaming agent or combination thereof.

In another preferred example, the pH regulator is an organic silicon environment-friendly pH regulator; preferably, BS16, WACKER, works as a pH adjuster.

In another preferred embodiment, the film-forming material of the present invention is acrylic copolymer emulsion; preferably, the particle size distribution of the acrylic copolymer emulsion is 150-240 nm, and the minimum film-forming temperature MFFT of the acrylic copolymer emulsion is 0-7 ℃; and/or a weight solids content of 45% to 50%. Preferably, the film-forming material is odorless acrylic copolymer emulsion, has low odor and low film-forming temperature, and can form a film well in an environment with low air temperature without a film-forming aid. Preferably, the copolymer emulsions used in the present invention have self-crosslinking capability so that they have good film-forming properties without the use of film-forming aids necessary in conventional coatings.

In another preferred embodiment, the wetting and dispersing agent includes (but is not limited to): polycarboxylate wetting dispersants; typically, the polycarboxylate wetting dispersant is a polycarboxylate sodium wetting dispersant, and the polycarboxylate sodium wetting dispersant has good wetting and dispersing capacity, can increase the loading amount of pigments and improve the dispersibility during pulping, and is also favorable for freeze-thaw resistance. Preferably, the wetting and dispersing agent is a polycarboxylic acid anionic surfactant.

In another preferred embodiment, the pigment and filler comprises a pigment and/or a filler; wherein the pigment is rutile titanium dioxide; it has better whiteness and better covering power; the filler is at least one or more of wollastonite, silica, mica powder, talcum powder, calcined kaolin, nepheline powder, barite powder, coarse whiting, aluminum silicate and diatomite.

In another preferred embodiment, the filler is selected from powder with high hardness, low polarity and inertia, such as wollastonite, silicon carbide and the like, as the main powder, and other powder is selected according to the formula requirement, wherein the specific raw material adopts a commercially available product; the titanium dioxide provides the color of the paint, and the filler increases the hardness and compactness of a paint film, prevents cracking, resists scrubbing and the like.

In another preferred example, the antifreezing agent is a phosphate antifreezing agent or phosphate surfactant, and the antifreezing agent has the functions of preventing freezing and promoting leveling.

In the present invention, the mildewcide and the preservative are not particularly limited as long as they do not limit the object of the present invention; in one embodiment, the amount of the mildewcide is 0 to 1.0 part by weight, preferably 0.1 to 1.0 part by weight, and more preferably 0.3 ± 0.1 part by weight; in one embodiment, the preservative is used in an amount of 0 to 1.0 parts by weight, preferably 0.1 to 1.0 parts by weight, more preferably 0.6 ± 0.1 parts by weight.

Specifically, the preservative may be, but not limited to, Octyl Isothiazolinone (OIT), Benzisothiazolinone (BIT), Methylisothiazolinone (MIT), derivatives thereof, and the like; the mildewcide may be, but is not limited to, iodopropynyl butyl carbamate (IPBC), Zinc Pyrithione (ZPT), derivatives thereof, and the like.

The "acceptable amount of water" in the present invention means that the water is mainly used as a dispersion medium, and the amount is not particularly limited, and is sufficient for the formulation system to be uniformly dispersed and to have a desired viscosity.

Preparation method

The invention also provides a preparation method of the water-based latex paint composition, which comprises the following steps:

(1) putting water into a dispersion tank, and controlling the rotating speed to be 300-500 revolutions per minute;

(2) then adding a defoaming agent, a thickening agent (preferably cellulose ether or inorganic bentonite thickening agent) and a wetting dispersant, and sequentially adding into a dispersion tank to stir for 3 +/-1 minutes;

(3) sequentially adding the filler and the pigment into a dispersion tank, increasing the rotating speed to 1200-1800 rpm, and dispersing at a high speed for 15 +/-3 minutes;

(4) after high-speed dispersion, reducing the rotating speed to 600-800 revolutions per minute, adding a little water and stirring for 3 +/-1 minutes;

(5) slowly adding the film forming substance, and stirring for 5 +/-2 minutes;

(6) adding thickener (preferably polyurethane thickener), and stirring for 3 + -1 min

(7) Then adding an antifreezing agent, and stirring for 3 +/-1 minutes;

(8) then adding the mildew preventive and the preservative in sequence, and stirring for 3 +/-1 minutes;

(9) then stirring the defoaming agent for 2 +/-1 minutes;

(10) then adding a pH regulator to regulate the pH value to 8-10;

(11) finally, water is added to adjust the viscosity to the desired viscosity, and the coating composition is obtained.

The main advantages of the invention include:

(a) the invention aims at the technical problems to be solved in the field, namely, the coating composition has low smell, no free formaldehyde, no organic volatile compound (VOC) is detected, and the performance of the product is required to be maintained or even improved; it does not release irritating harmful substances during drying process, and can cause or induce consumer allergy and asthma, and has effects of preventing asthma and allergy. In particular, the particular copolymer emulsions used in the present invention allow good film-forming properties without the use of film-forming auxiliaries necessary in conventional coatings.

(b) The high-environmental-protection auxiliary agents with advanced technology are selected, do not contain APEO, VOC and national standard limited heavy metals and compounds, and are compounded into the product to play a role in synergy. In particular, the antifreeze and the wetting dispersant are screened, and particularly, the antifreeze can improve the powder dispersion efficiency.

(c) The composition of the invention selects the combination of high-quality proper pigment and filler, so that the product has excellent performances, especially the requirement of the national standard of interior wall products on the covering power (the superior product is more than or equal to 0.95) and the requirement on the scrubbing resistance (the superior product is more than or equal to 6000 times).

(d) On the basis of the standard of GB 18582-.

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out under conventional conditions or conditions recommended by the manufacturers. Unless otherwise indicated, percentages and parts are percentages and parts by weight. The molecular weight of the polymer is the number average molecular weight.