CN111378331A

CN111378331A - Environment-friendly latex paint for decoration and preparation method thereof

Info

Publication number: CN111378331A
Application number: CN202010245110.XA
Authority: CN
Inventors: 张炜杰; 彭珺
Original assignee: Shanghai Modern Decoration Art Co ltd
Current assignee: Shanghai Modern Decoration Art Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-07-07

Abstract

The invention relates to the technical field of emulsion paint, in particular to environment-friendly emulsion paint for decoration and a preparation method thereof. The environment-friendly latex paint for decoration at least comprises the following raw materials in parts by weight: 100-300 parts of polymer emulsion, 80-180 parts of filler, 100-200 parts of water, 10-20 parts of pigment, 2-10 parts of defoaming agent, 2-10 parts of thickening agent, 2-10 parts of flatting agent, 2-10 parts of dispersing agent and 0-10 parts of other auxiliary agent. The invention has reasonable compatibility, and the obtained latex paint has lower formaldehyde content and VOC content, is green and environment-friendly and has higher safety. Tests prove that the latex paint of the invention has no formaldehyde detected, the VOC content is lower than 5g/L and far lower than the requirement of national standard, and the latex paint is not toxic in production and construction, and can effectively absorb harmful gas and purify air.

Description

Environment-friendly latex paint for decoration and preparation method thereof

Technical Field

The invention relates to the technical field of emulsion paint, in particular to environment-friendly emulsion paint for decoration and a preparation method thereof.

Background

Latex paint is an indispensable paint surface material in the modern decoration field, and interior wall latex paint is a product in the modern interior decoration field. Latex paint is a common name of latex paint, is produced in the middle and late seventies of the twentieth century, and is a large class of thin-coating paint represented by acrylic ester copolymer emulsion. The emulsion paint is water dispersive paint, which is prepared with synthetic resin emulsion as base material, stuffing, and assistants. The latex paint has many advantages different from the traditional wall paint, such as easy coating, rapid drying, water resistance of paint film, etc.

Nowadays, with the continuous deepening of the concept of green environmental protection, the energy-saving standard is continuously improved in the construction of residential projects, and various construction units introduce and develop a plurality of novel energy-saving technologies and materials, so that the energy-saving technology and the materials are widely popularized and applied in civil buildings. The research of special institutions finds that the pollution of indoor decoration materials and new furniture is the main cause of indoor air pollution. In the interior decoration material, the latex paint occupies a large area, but the latex paint sold in the market at present has the advantages of convenient surface construction, selectable colors, easy maintenance and the like, but the adsorption capacity to the pollution source of the indoor air needs to be improved; the latex paint which has good environmental protection performance and has the functions of filtering and absorbing pollution sources in indoor air becomes the demand in the industry. Especially for decorating new houses and families with pregnant women, children and old people at home, the selection of proper and environment-friendly functional latex paint is a very important link.

It has become a great trend to reduce the content of VOC in latex paint, because VOC is a main factor causing damage to human bodies in air pollution, medical science proves that when the indoor content exceeds a certain amount, people have uncomfortable symptoms such as headache, nausea, vomiting, hypodynamia and the like, if people leave the scene in time, people can have convulsion, coma and hypomnesis in severe cases, and the liver, kidney, brain and nervous system of people are injured. Therefore, the development of the healthy and environment-friendly waterborne polyurethane interior wall latex paint with the absolute VOC content close to zero tends to further improve the environment-friendly level of the whole industry.

Disclosure of Invention

In order to solve the technical problems, the first aspect of the invention provides an environment-friendly latex paint for decoration, which at least comprises the following raw materials in parts by weight: 100-300 parts of polymer emulsion, 80-180 parts of filler, 100-200 parts of water, 10-20 parts of pigment, 2-10 parts of defoaming agent, 2-10 parts of thickening agent, 2-10 parts of flatting agent, 2-10 parts of dispersing agent and 0-10 parts of other auxiliary agent.

As a preferable technical solution of the present invention, the other auxiliary agent at least includes at least one of a bactericide, a mildewproof agent, a pH adjuster, a wetting agent, an antifreezing agent, and a film-forming auxiliary agent.

As a preferred technical solution of the present invention, the polymer emulsion is at least one selected from acrylate emulsion, silicone-acrylate emulsion, styrene-acrylate emulsion, vinyl acetate-ethylene copolymer emulsion, and vinyl acetate-acrylate emulsion.

As a preferable technical scheme of the invention, the polymer emulsion is a combination of styrene-acrylic emulsion and vinyl acetate-ethylene copolymer emulsion, and the weight ratio is 1: (0.5-2).

As a preferred technical solution of the present invention, the filler is at least one selected from calcined kaolin, mica powder, diatomaceous earth, talc powder, ceramic micropowder, barite powder, quartz powder, and precipitated barium sulfate.

As a preferred technical scheme of the present invention, the filler is a combination of diatomaceous earth and ground calcium carbonate, and the weight ratio is 1: (0.3-1.5).

In a preferred embodiment of the present invention, the diatomaceous earth is metal ion-modified diatomaceous earth.

In a preferred embodiment of the present invention, the thickener is at least one selected from the group consisting of a cellulose thickener, an alkali-swellable thickener, and a polyurethane thickener.

In a preferred embodiment of the present invention, the defoaming agent is at least one selected from a mineral oil defoaming agent and a silicone defoaming agent.

The second aspect of the invention provides a preparation method of the environment-friendly decorative latex paint, which at least comprises the following steps:

(1) adding water, a dispersing agent and a defoaming agent into a device for dispersing according to the formula amount;

(2) adding the pigment and the filler in the formula amount into the step (1) for continuous dispersion, and grinding until the fineness is less than 100 mu m;

(3) finally adding the polymer emulsion, the thickening agent, the flatting agent, other auxiliary agents and the residual defoaming agent according to the formula ratio, dispersing uniformly, and filtering by using a 100-micron filter screen to obtain the product.

Has the advantages that: the invention has reasonable compatibility, and the obtained latex paint has lower formaldehyde content and VOC content, is green and environment-friendly and has higher safety. The verification proves that formaldehyde is not detected in the latex paint provided by the invention, and the VOC content is lower than 5g/L and far lower than the requirement of national standard.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.

In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.

In a preferred embodiment, the environment-friendly decorative latex paint comprises the following raw materials in parts by weight: 200 parts of polymer emulsion, 150 parts of filler, 150 parts of water, 15 parts of pigment, 5 parts of defoaming agent, 6 parts of thickening agent, 4 parts of flatting agent and 7 parts of dispersing agent.

Polymer emulsions

In the invention, the polymer emulsion is selected from at least one of acrylate emulsion, silicone-acrylic emulsion, styrene-acrylic emulsion, vinyl acetate-ethylene copolymer emulsion and vinyl acetate-acrylic emulsion.

In a preferred embodiment, the polymer emulsion is a combination of styrene-acrylic emulsion and vinyl acetate-ethylene copolymer emulsion, and the weight ratio is 1: (0.5-2).

In a more preferred embodiment, the polymer emulsion is a combination of a styrene-acrylic emulsion and a vinyl acetate-ethylene copolymer emulsion in a weight ratio of 1: 1.2.

styrene-acrylic emulsion

The styrene-acrylic emulsion is prepared by emulsion copolymerization of styrene and acrylic ester monomer. The styrene-acrylic emulsion is a system which is researched more in emulsion polymerization and is one of ten non-crosslinked emulsions with important industrial application value in the world nowadays. The styrene-acrylic emulsion has wide application as an important intermediate chemical product, and is mainly used as building coating, metal surface latex coating, floor coating, paper adhesive, adhesive and the like. The styrene-acrylic emulsion has good adhesive force, transparent adhesive film, good water resistance, oil resistance, heat resistance and aging resistance. The styrene-acrylic emulsion is used as an adhesive for paper products, and can also be matched with adhesives such as starch, polyvinyl alcohol, sodium carboxymethyl cellulose and the like for use.

In the invention, the dynamic viscosity of the styrene-acrylic emulsion at 25 ℃ is 800-3000mPa & s.

In a preferred embodiment, the dynamic viscosity of the styrene-acrylic emulsion at 25 ℃ is 1000-1500 mPas.

In the present invention, the source of the styrene-acrylic emulsion is not particularly limited, and chemical companies such as Jinlan, Jinan, and the like may be mentioned.

Vinyl acetate-ethylene copolymer emulsion

The ethylene-vinyl acetate copolymer is a general high molecular polymer, and is called EVA for short. When the content of vinyl acetate in the EVA is less than 20%, the EVA can be used as plastic. EVA has good low temperature resistance, the thermal decomposition temperature is lower, about 230 ℃, the softening point of EVA is increased along with the increase of molecular weight, the processability and the surface gloss of plastic parts are reduced, but the strength is increased, the impact toughness and the environmental stress cracking resistance are improved, the chemical resistance and the oil resistance of EVA are slightly lower than those of PE (polyethylene) and PVC (polyvinyl chloride), and the change is more obvious along with the increase of the content of vinyl acetate. The EVA has improved performance compared with PE, mainly in the aspects of elasticity, flexibility, glossiness, air permeability and the like, in addition, the environmental stress cracking resistance of the EVA is improved, the compatibility to the filler is increased, and the reduction of the mechanical property of the EVA to the PE can be avoided or reduced by adopting a method of adding more reinforcing filler. EVA can also be used in new applications by modification, which can be mainly considered from two aspects: firstly, EVA is used as the stem of grafting of other monomers; secondly, performing partial alcoholysis on the EVA.

In the invention, the weight percentage of ethylene in the vinyl acetate-ethylene copolymer emulsion is 10-20%.

In a preferred embodiment, the ethylene weight fraction of the vinyl acetate-ethylene copolymer emulsion is 14-18%.

In the present invention, the vinyl acetate-ethylene copolymer emulsion is not particularly limited in its source, and may be obtained from Kyowa chemical Co., Ltd., Guangzhou under the trade name GW-707.

According to the invention, through compounding of the two polymer emulsions, the inventor can reduce the VOC content in the emulsion paint without additionally adding a film-forming assistant, thereby achieving excellent environmental protection performance.

Filler material

In the invention, the filler is selected from at least one of calcined kaolin, mica powder, diatomite, talcum powder, ceramic micro powder, barite powder, quartz powder and precipitated barium sulfate.

In a preferred embodiment, the filler is a combination of diatomaceous earth and ground calcium carbonate in a weight ratio of 1: (0.3-1.5).

In a more preferred embodiment, the filler is a combination of diatomaceous earth and ground calcium carbonate in a weight ratio of 1: 0.8.

ground calcium carbonate

Ground calcium carbonate, called triple superphosphate for short, is ground from natural carbonate minerals such as calcite, marble and limestone. The inorganic filler is a common powdery inorganic filler and has the advantages of high chemical purity, high inertia, difficult chemical reaction, good thermal stability, no decomposition at the temperature of below 400 ℃, high whiteness, low oil absorption rate, low refractive index, soft quality, dryness, no crystal water, low hardness, low abrasion value, no toxicity, no odor, good dispersibility and the like.

In a preferred embodiment, the fineness of the heavy calcium carbonate is 200-1000 mesh.

In a more preferred embodiment, the ground calcium carbonate has a fineness of 600 mesh.

In the present invention, the source of the heavy calcium carbonate is not particularly limited, and Zhejiang Haiyang mining Co.

Diatomite

Diatomaceous earth is a siliceous rock that is distributed primarily in china, the united states, japan, denmark, france, romania, and other countries. Is a biogenic siliceous sedimentary rock which is mainly composed of remains of ancient diatoms. The chemical composition of which is SiO₂Mainly, SiO can be used₂·nH₂And O represents. The chemical composition of the diatomite is mainly SiO₂Containing a small amount of Al₂O₃、Fe₂O₃CaO, MgO, etc., and organic matter. SiO2₂Usually more than 80%, up to 94%. The high-quality diatomite generally has an iron oxide content of 1-1.5% and an aluminum oxide content of 3-6%. The mineral components of diatomaceous earth are mainly opals and their variants, and secondly the clay minerals — hydromicas, kaolinites and mineral crumbs. Mineral chipIncluding quartz, feldspar, biotite, organic matter, etc. The content of organic matters is from trace to over 30 percent. The diatomite is white, grey, light brown and the like, and has the properties of fineness, looseness, light weight, porosity, water absorption and strong permeability. Most of the silicon oxide of the diatomite is amorphous, and the content of soluble silicic acid in alkali is 50-80%. The amorphous SiO2 is changed into a crystal form when heated to 800-1000 ℃, and the soluble silicic acid in the alkali can be reduced to 20-30%.

In a preferred embodiment, the diatomaceous earth is metal ion-modified diatomaceous earth.

In a more preferred embodiment, the metal ion is one of silver ion and/or copper ion.

In a more preferred embodiment, the metal ions are a combination of copper ions and silver ions.

The preparation method of the metal ion modified diatomite comprises the following steps: adding silver nitrate and copper sulfate solution into diatomite powder, placing the diatomite powder into a shaking machine for shaking for 1-2 hours, drying and storing in vacuum to obtain the diatomite powder.

In a preferred embodiment, the weight ratio of the diatomite, the silver nitrate and the copper sulfate is 100: (1-5): (1-5).

In a preferred embodiment, the weight ratio of the diatomite, the silver nitrate and the copper sulfate is 100: 3: 3.

in a preferred embodiment, the fineness of the diatomite is 200-1000 meshes.

In a more preferred embodiment, the diatomaceous earth has a fineness of 325 mesh.

In the present invention, the source of the diatomaceous earth is not particularly limited, and Shijiazhuang Hualang mineral products trade Co.

The inventor thinks that the possible reasons are that the metal ions loaded in the modified diatom greatly improve the adsorption efficiency of the latex paint on harmful gases in the household environment, particularly formaldehyde, and the existence of silver ions improves the antibacterial performance of the latex paint, so that a good household environment is created, and the latex paint is environment-friendly and healthy.

Pigment (I)

In the invention, the pigment is at least one of rutile titanium dioxide, iron oxide red, iron oxide yellow, iron oxide black, phthalocyanine blue and phthalocyanine green.

In a preferred embodiment, the pigment is rutile titanium dioxide.

Defoaming agent

Defoamers are substances that reduce the surface tension of water, solutions, suspensions, etc., prevent the formation of foam, or reduce or eliminate the original foam. The defoamer should have the following properties: (1) the defoaming force is strong, and the dosage is small; (2) the addition to the foaming system does not affect the basic properties of the system, i.e. does not react with the system to be defoamed; (3) the surface tension is small; (4) the balance of the surface is good; (5) the heat resistance is good; (6) good diffusivity and permeability, and high positive spreading coefficient; (7) the chemical stability and the oxidation resistance are strong; (8) the gas solubility and the permeability are good; (9) the solubility in foaming solution is small; (10) has no physiological activity and high safety. The application of the defoaming agent is very wide, such as the food industry, the paper industry, the water treatment industry, the oil extraction industry, the printing and dyeing industry, the coating industry, the detergent industry, the rubber latex industry, the aerosol industry, the daily chemical industry, the medical industry, the dairy industry and the like.

In the present invention, the defoaming agent is at least one selected from the group consisting of a mineral oil defoaming agent and a silicone defoaming agent.

In a preferred embodiment, the defoamer is a mineral oil defoamer.

In the present invention, the source of the defoaming agent is not particularly limited, and may be, for example, Guangzhou Yao Innovative materials Co., Ltd., model number sn-nxz.

Thickening agent

Also known as gelling agent, is a substance that increases the viscosity of latex and liquids, and is also known as a paste when used in food. The thickening agent can improve the viscosity of the system, so that the system is kept in a uniform and stable suspension state or an emulsion state, or forms gel; most thickeners combine an emulsifying action. Can be divided into two main categories of natural and synthetic. The natural products are mostly prepared from plants and seaweed containing polysaccharide viscous substances, such as starch, acacia, pectin, agar, gelatin, seaweed gel, carrageenan, dextrin, etc., and general gelatin, soluble starch, polysaccharide derivatives, etc. can be used in cosmetics; the synthetic product includes carboxymethyl cellulose, propylene glycol alginate, methyl cellulose, sodium starch phosphate, sodium carboxymethyl cellulose, sodium alginate, casein, sodium polyacrylate, polyoxyethylene, and polyvinylpyrrolidone. Thickeners are widely used in foods (e.g., food additives for increasing food viscosity or forming gel in sauces, jams, ice creams, cans, etc.), cosmetics, detergents, emulsions, printing and dyeing, pharmaceuticals, rubbers, paints, and the like.

In the present invention, the thickener is at least one selected from the group consisting of a cellulose-based thickener, an alkali-swellable thickener, and a polyurethane thickener.

In a preferred embodiment, the thickener is a cellulosic thickener.

In a more preferred embodiment, the cellulosic thickener is hydroxyethyl cellulose and/or hydroxypropyl methyl cellulose.

In a most preferred embodiment, the thickener is hydroxyethyl cellulose.

Leveling agent

The leveling agent is a common paint auxiliary agent and can promote the paint to form a flat, smooth and uniform coating film in the drying film-forming process. Can effectively reduce the surface tension of the finishing liquid and improve the leveling property and uniformity of the finishing liquid. Can improve the permeability of the coating liquid, reduce the possibility of generating spots and stains during the brush coating, increase the coverage and ensure that the formed film is uniform and natural. Mainly surfactant, organic solvent, etc. Many types of leveling agents are used, and the types of leveling agents used in different coatings are different. High boiling point solvents or butyl cellulose may be used in the solvent based finish. In the water-based coating agent, a surfactant, polyacrylic acid, carboxymethyl cellulose, or the like is used.

In the present invention, the leveling agent is not particularly limited.

In a preferred embodiment, the leveling agent is at least one selected from cross-linked silicone polyether acrylate copolymer, dimethylpolysiloxane, and polysiloxane-polyether copolymer.

In a more preferred embodiment, the leveling agent is polyether-modified polydimethylsiloxane.

In the present invention, the source of the leveling agent is not particularly limited, and Qianzhi chemical company, Buddha, may be mentioned.

Dispersing agent

A Dispersant (Dispersant) is a surfactant that has both lipophilic and hydrophilic properties in opposite directions within a molecule. The amphiphilic agent is capable of uniformly dispersing solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in liquids, and also preventing settling and agglomeration of the particles to form stable suspensions.

In the present invention, the dispersant is not particularly limited.

In a preferred embodiment, the dispersant is an acrylic dispersant.

In the present invention, the source of the dispersant is not particularly limited, and there may be mentioned Nantong Yongle chemical Co., Ltd., trade name: a dispersant IW.

Other auxiliaries

In the invention, the other auxiliary agents at least comprise at least one of a bactericide, a mildew preventive, a pH regulator, a wetting agent, an antifreezing agent and a film-forming auxiliary agent.

The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.

In addition, the starting materials used are all commercially available, unless otherwise specified.

Examples

Example 1

Embodiment 1 provides an environment-friendly latex paint for decoration, which comprises the following raw materials in parts by weight: 200 parts of polymer emulsion, 150 parts of filler, 150 parts of water, 15 parts of pigment, 5 parts of defoaming agent, 6 parts of thickening agent, 4 parts of flatting agent and 7 parts of dispersing agent.

The polymer emulsion is a combination of styrene-acrylic emulsion and vinyl acetate-ethylene copolymer emulsion, and the weight ratio is 1: 1.2; the styrene-acrylic emulsion is purchased from chemical company Limited of Jinlan of Jinnann of Ji; the vinyl acetate-ethylene copolymer emulsion is purchased from Kyowa chemical Co., Ltd., Guangzhou, under the brand name GW-707.

The filler is a combination of diatomite and ground limestone, and the weight ratio is 1: 0.8; the fineness of the heavy calcium carbonate is 600 meshes, and the heavy calcium carbonate is purchased from Zhejiang Haiyang mining Co Ltd; the diatomite is metal ion modified diatomite; the preparation method of the metal ion modified diatomite comprises the following steps: adding silver nitrate and copper sulfate solution into diatomite powder, placing the diatomite powder into a shaking machine for shaking for 2 hours, drying and storing in vacuum to obtain the diatomite powder; the weight ratio of the diatomite to the silver nitrate to the copper sulfate is 100: 3: 3; the diatomite has the fineness of 325 meshes and is purchased from Shijiazhuang Hualang mineral product trade company Limited.

The pigment is rutile titanium dioxide.

The defoamer is a mineral oil defoamer and is purchased from Guangzhou Yao Innovative materials Co., Ltd, model number sn-nxz.

The thickening agent is hydroxyethyl cellulose.

The leveling agent is polyether modified polydimethylsiloxane, and is purchased from Qianzhi chemical Limited company in Foshan City.

The dispersant is an acrylic dispersant, and is purchased from Nantong Yongle chemical Co., Ltd, with the trade name: a dispersant IW.

The preparation method of the environment-friendly emulsion paint for decoration at least comprises the following steps:

(3) and finally adding the polymer emulsion, the thickening agent, the flatting agent, other auxiliary agents and the residual defoaming agent according to the formula ratio, uniformly dispersing, and filtering by using a 200-micron filter screen to obtain the nano-emulsion.

Example 2

Embodiment 2 provides an environment-friendly latex paint for decoration, which comprises the following raw materials in parts by weight: 100 parts of polymer emulsion, 80 parts of filler, 100 parts of water, 10 parts of pigment, 2 parts of defoaming agent, 2 parts of thickening agent, 2 parts of flatting agent and 2 parts of dispersing agent.

The polymer emulsion is a combination of styrene-acrylic emulsion and vinyl acetate-ethylene copolymer emulsion, and the weight ratio is 1: 0.5; the styrene-acrylic emulsion is purchased from chemical company Limited of Jinlan of Jinnann of Ji; the vinyl acetate-ethylene copolymer emulsion is purchased from Kyowa chemical Co., Ltd., Guangzhou, under the brand name GW-707.

The filler is a combination of diatomite and ground limestone, and the weight ratio is 1: 0.3; the fineness of the heavy calcium carbonate is 200 meshes, and the heavy calcium carbonate is purchased from Zhejiang Haiyang mining Co Ltd; the diatomite is metal ion modified diatomite; the preparation method of the metal ion modified diatomite comprises the following steps: adding silver nitrate and copper sulfate solution into diatomite powder, placing the diatomite powder into a shaking machine for shaking for 2 hours, drying and storing in vacuum to obtain the diatomite powder; the weight ratio of the diatomite to the silver nitrate to the copper sulfate is 100: 1: 1; the diatomite has the fineness of 325 meshes and is purchased from Shijiazhuang Hualang mineral product trade company Limited.

The pigment is rutile titanium dioxide.

The thickening agent is hydroxyethyl cellulose.

Example 3

Embodiment 3 provides an environment-friendly latex paint for decoration, which comprises the following raw materials in parts by weight: 300 parts of polymer emulsion, 180 parts of filler, 200 parts of water, 20 parts of pigment, 10 parts of defoaming agent, 10 parts of thickening agent, 10 parts of flatting agent and 10 parts of dispersing agent.

The polymer emulsion is a combination of styrene-acrylic emulsion and vinyl acetate-ethylene copolymer emulsion, and the weight ratio is 1: 2; the styrene-acrylic emulsion is purchased from chemical company Limited of Jinlan of Jinnann of Ji; the vinyl acetate-ethylene copolymer emulsion is purchased from Kyowa chemical Co., Ltd., Guangzhou, under the brand name GW-707.

The filler is a combination of diatomite and ground limestone, and the weight ratio is 1: 1.5; the fineness of the heavy calcium carbonate is 1000 meshes, and the heavy calcium carbonate is purchased from Zhejiang Haiyang mining Co Ltd; the diatomite is metal ion modified diatomite; the preparation method of the metal ion modified diatomite comprises the following steps: adding silver nitrate and copper sulfate solution into diatomite powder, placing the diatomite powder into a shaking machine for shaking for 2 hours, drying and storing in vacuum to obtain the diatomite powder; the weight ratio of the diatomite to the silver nitrate to the copper sulfate is 100: 5: 5; the diatomite has the fineness of 325 meshes and is purchased from Shijiazhuang Hualang mineral product trade company Limited.

The pigment is rutile titanium dioxide.

The thickening agent is hydroxyethyl cellulose.

Example 4

Embodiment 4 provides an environment-friendly latex paint for decoration, which comprises the following raw materials in parts by weight: 200 parts of polymer emulsion, 150 parts of filler, 150 parts of water, 15 parts of pigment, 5 parts of defoaming agent, 6 parts of thickening agent, 4 parts of flatting agent and 7 parts of dispersing agent.

The filler is heavy carbonic acid.

The pigment is rutile titanium dioxide.

The thickening agent is hydroxyethyl cellulose.

Example 5

Embodiment 5 provides an environment-friendly latex paint for decoration, which comprises the following raw materials in parts by weight: 200 parts of polymer emulsion, 150 parts of filler, 150 parts of water, 15 parts of pigment, 5 parts of defoaming agent, 6 parts of thickening agent, 4 parts of flatting agent and 7 parts of dispersing agent.

The filler is a combination of diatomite and ground limestone, and the weight ratio is 1: 0.8; the fineness of the heavy calcium carbonate is 600 meshes, and the heavy calcium carbonate is purchased from Zhejiang Haiyang mining Co Ltd; the diatomite has the fineness of 325 meshes and is purchased from Shijiazhuang Hualang mineral product trade company Limited.

The pigment is rutile titanium dioxide.

The thickening agent is hydroxyethyl cellulose.

Performance testing

The environment-friendly latex paint prepared in the examples 1-5 meets the GB/T9756-.

According to GB/T18883/2002 indoor air quality standard, the environmental-friendly latex paints of examples 1-5 and a commercial latex paint are respectively taken as a control group for testing, and the test results are shown in the following table:

the foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.

Claims

1. The environment-friendly latex paint for decoration is characterized by at least comprising the following raw materials in parts by weight: 100-300 parts of polymer emulsion, 80-180 parts of filler, 100-200 parts of water, 10-20 parts of pigment, 2-10 parts of defoaming agent, 2-10 parts of thickening agent, 2-10 parts of flatting agent, 2-10 parts of dispersing agent and 0-10 parts of other auxiliary agent.

2. The decorative environment-friendly latex paint according to claim 1, wherein the other additives comprise at least one of a bactericide, a mildewproof agent, a pH regulator, a wetting agent, an antifreezing agent and a film forming additive.

3. The environmentally friendly decorative latex paint of claim 1, wherein said polymer emulsion is at least one selected from the group consisting of acrylate emulsion, silicone-acrylate emulsion, styrene-acrylic emulsion, vinyl acetate-ethylene copolymer emulsion and vinyl acetate-acrylate emulsion.

4. The environmentally friendly latex paint for finishing of claim 3, wherein the polymer emulsion is a combination of styrene-acrylic emulsion and vinyl acetate-ethylene copolymer emulsion, and the weight ratio is 1: (0.5-2).

5. The environmentally friendly decorative latex paint of claim 1, wherein the filler is at least one selected from calcined kaolin, mica powder, diatomite, talc powder, ceramic micropowder, barite powder, quartz powder and precipitated barium sulfate.

6. The environmentally friendly latex paint for finishing of claim 5, wherein the filler is a combination of diatomaceous earth and ground calcium carbonate in a weight ratio of 1: (0.3-1.5).

7. The environmentally friendly decorative latex paint of claim 6, wherein the diatomaceous earth is metal ion modified diatomaceous earth.

8. The environmentally friendly decorative latex paint of claim 1, wherein said thickener is at least one selected from the group consisting of cellulosic thickeners, alkali swellable thickeners, and polyurethane thickeners.

9. The environmentally friendly decorative latex paint of claim 1, wherein said defoamer is at least one of a mineral oil defoamer and a silicone defoamer.

10. A method for preparing the decorative environmental protection latex paint according to any one of claims 1-9, which comprises at least the following steps: