CN102304305B - Persimmon peel extractive, extraction method thereof and formaldehyde-removal coating containing persimmon peel extractive - Google Patents
Persimmon peel extractive, extraction method thereof and formaldehyde-removal coating containing persimmon peel extractive Download PDFInfo
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- CN102304305B CN102304305B CN 201110159302 CN201110159302A CN102304305B CN 102304305 B CN102304305 B CN 102304305B CN 201110159302 CN201110159302 CN 201110159302 CN 201110159302 A CN201110159302 A CN 201110159302A CN 102304305 B CN102304305 B CN 102304305B
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- pericarpium kaki
- coating
- formaldehyde
- extract
- filtrate
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Landscapes
- Paints Or Removers (AREA)
Abstract
The invention relates to the field of fine chemical engineering, in particular to a persimmon peel extractive, an extraction method thereof and a formaldehyde-removal coating containing persimmon peel extractive. The persimmon peel extractive is characterized in that the persimmon peel is dried, smashed and screened to obtain the dry powder of the persimmon peel; and then, the dry powder of the persimmon peel is extracted by acetone to obtain the persimmon peel extractive. The coating comprises the persimmon peel extractive. The coating provided by the invention does not release formaldehyde and has low content of volatile organic compounds (VOC), and the quality conforms to the national standard. Experiments prove that the coating provided by the invention can be used for effectively inhibiting bacteria of which the bacteria inhibition rate is more than 99.99%, and formaldehyde strainaway rate is 93.16-95.97%. The interiro wall latex paint provided by the invention has the strainaway rate for VOC is 68.79-73.17%, wherein the strainaway rate for benzene is 63.14-73.06%, and thus the persimmon peel extractive can effectively and continuously remove formaldehyde in the air and other volatile organic compound airs (VOC).
Description
Technical field
The present invention relates to field of fine chemical, particularly Pericarpium Kaki extract and extracting method thereof and contain the Pericarpium Kaki extract except methanal paint.
Background technology
In recent years, along with the raising of China's expanding economy and living standards of the people, people's environmental consciousness and health requirements strengthen day by day, and the hazardous and noxious substances pollution on the environment in building and ornament materials, the impact that human health is caused also become increasingly conspicuous.Hazardous and noxious substances is mainly derived from the pollutents such as formaldehyde that building and ornament materials discharge, ammonia, benzene homologues.Wherein, formaldehyde is mainly derived from the glued board be used for indoor ornamentation, Blockboard, paint, in the finishing material such as coating, is a kind of colourless easily molten irritant gas, hazard ratio to human body is larger, it can cause eyes, skin and and the hormesis of respiratory tract, cause neural system, immunity system, endocrine system dysfunction, there is embryotoxicity, teratogenesis, carcinogenesis simultaneously.Ammonia is a kind of colourless, has the gas of intense stimulus smell, often is adsorbed on a conjunctiva and skin mucosa, and human body produce is stimulated and inflammation, can corrode and tissue that stimulation contacts, mainly comes from fire retardant in finishing material, frostproofer, additive etc.
At present, all the purification of indoor environment has been done to deep research both at home and abroad, developed a series of air clearing product, as anion generator, anionic additive, formaldehyde absorbent etc.But some formaldehyde absorbents itself are exactly the synthetic chemical, self can discharge other dusty gas when removing formaldehyde, contaminate environment works the mischief to HUMAN HEALTH simultaneously.
Persimmon, the Ebenaceae calamander, be the large fruit of China, output is large, except eating raw, how drying one-tenth dried persimmon.Produced a large amount of Pericarpium Kakis in the process of dried persimmon being made to dried persimmon, research shows, contains a large amount of polyphenols in Pericarpium Kaki, and polyphenols has the effect of removing preferably odorous gas, removing formaldehyde, just discarded without utilizing, caused waste and the environmental pollution of resource.
Summary of the invention
In view of this, the methanal paint that removes that the invention provides a kind of Pericarpium Kaki extract and extracting method thereof and contain the Pericarpium Kaki extract.This Pericarpium Kaki extract by by the Pericarpium Kaki drying, pulverize, sieve, make Pericarpium Kaki dry powder, then obtain the Pericarpium Kaki extract with acetone extract.Pericarpium Kaki extract in the present invention is natural plant extracts,, containing the artificial chemistry product, does not have removing formaldehyde, eliminates stink, and effect such as antibacterial grade, can be used as paint additive, and prepare coating.
In order to realize the foregoing invention purpose, the invention provides following technical scheme:
The invention provides a kind of extracting method of Pericarpium Kaki extract, comprising:
Step 1: Pericarpium Kaki dry powder is pulverized, sieves, made to Pericarpium Kaki, through 60 ℃ of oven dry 10h;
Step 2: in g/mL, in Pericarpium Kaki dry powder, according to mass volume ratio, add the aqueous acetone solution that volume fraction is 50% at 1: 12, at 45 ℃ of water-bath lucifuge lixiviate 2h, filter, obtain the first filtrate; Collect filter residue and add by mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 6 again, extract 1h, obtain the second filtrate; The first filtrate, the second filtrate are mixed, and distillation obtains concentrated solution, obtains the Pericarpium Kaki extract after lyophilize.
The present invention also provides the Pericarpium Kaki obtained by said extracted method extract.
The Pericarpium Kaki extract obtained is carried out to routine evaluation, and result shows, contains the Pericarpium Kaki polyphenol in the Pericarpium Kaki extract, and by extracting method provided by the invention, the content of Pericarpium Kaki polyphenol in the Pericarpium Kaki extract has had and significantly improves, and is 79.9～95.3%.
Research shows, contain abundant polyphenols in Pericarpium Kaki, Pericarpium Kaki polyphenol in the Pericarpium Kaki extract is mainly condensed tannin, comprise flavanol compound, anthocyan, anthoxanthins, chlorogenic acid etc., phenolic hydroxyl group on catechin wherein has puies forward protogenic activity, and very strong reducing power is arranged, and formaldehyde protonated improved the electron deficiency on the carbonyl carbon, catechin from the negative oxygen ion separate generated with methane generation electrophilic addition reaction, its chemical equation is as follows:
Simultaneously, Pericarpium Kaki extract material has stronger active group-OH, the reactions such as it can neutralize with odorous substance, condensation, combination, bag pod, therefore to the main odorous substance of indoor environment obvious deodorizing effect being arranged, particularly stronger to the deodorizing capability of methylamine, Trimethylamine 99, ammonia, indoles.In addition, the chlorogenic acid in Pericarpium Kaki extract material is also a kind of good antibiotic, thereby Pericarpium Kaki extract provided by the invention also has good anti-microbial effect.
In view of above-mentioned Pericarpium Kaki extract removing formaldehyde, eliminate odorous gas, the characteristic aspect antibacterial, the present invention also provides the Pericarpium Kaki extract to absorb formaldehyde in preparation, has eliminated the application in stink or antibacterial paint additive.
The present invention also provides a kind of coating, comprises the Pericarpium Kaki extract, acceptable auxiliary agent in emulsion, titanium dioxide, coarse whiting, calcined kaolin, talcum powder and coating; Pericarpium Kaki dry powder is pulverized, sieves, made to described Pericarpium Kaki extract through 60 ℃ of oven dry 10h,, in g/mL by Pericarpium Kaki, add according to mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 12 in Pericarpium Kaki dry powder, at 45 ℃ of water-bath lucifuge lixiviate 2h, filter, obtain the first filtrate; Collect filter residue and add by mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 6 again, extract 1h, obtain the second filtrate; The first filtrate, the second filtrate are mixed, and distillation obtains concentrated solution, after lyophilize, makes.
As preferably, coating provided by the invention, by weight percentage, contain Pericarpium Kaki extract 1～3%.
As preferably, in described coating, acceptable auxiliary agent comprises one or more the mixture in thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, ethylene glycol, sanitas, mould inhibitor.
As preferably, described coating is water soluble paint.
Preferably, coating provided by the invention, by weight percentage, comprise: Pericarpium Kaki extract 1～3%, acrylate and vinyl acetate emulsion or benzene emulsion 23.5～44%, Natvosol thickening material 0.3～0.9%, AMP-95 multifunctional assistant 0.05～0.15%, wetting dispersing agent 0.3～0.6%, defoamer 0.2～0.4%, film coalescence aid 0.8～1.5%, ethylene glycol 1～1.5%, titanium dioxide 5～15%, coarse whiting 10～30%, calcined kaolin 5～15%, talcum powder 2～8%, sanitas 0.1～0.3%, mould inhibitor 0.1～0.3%.
The extracting method of Pericarpium Kaki extract provided by the invention, by by the Pericarpium Kaki drying, pulverize, sieve, make Pericarpium Kaki dry powder, then obtain the Pericarpium Kaki extract with acetone extract.Pericarpium Kaki extract provided by the invention is natural plant extracts,, containing the artificial chemistry product, does not have removing formaldehyde, eliminates stink, and effect such as antibacterial grade, can be used as paint additive, and, because it can be miscible with multiple coating, can be prepared into water-borne coatings.
Coating provided by the invention, self is release formaldehyde not, and the content of organic volatile gas (VOC) is lower, and quality meets national standard; Evidence, coating provided by the invention is anti-bacteria effectively, and bacteriostasis rate is greater than 99.99%, and the formaldehyde clearance is 93.16～95.97%; Interiro wall latex paint provided by the invention is 68.79～73.17% to the clearance of VOC, wherein, to the clearance of benzene, is 63.14～73.06%, can continuous and effective must remove airborne formaldehyde and other organic volatile gas (VOC).
Embodiment
The methanal paint that removes that the invention discloses a kind of Pericarpium Kaki extract and extracting method thereof and contain the Pericarpium Kaki extract, those skilled in the art can use for reference this paper content, suitably improve processing parameter and realize.Special needs to be pointed out is, all similar replacements and change apparent to those skilled in the artly, they all are deemed to be included in the present invention.Method of the present invention and application are described by preferred embodiment, the related personnel obviously can be changed methods and applications as herein described or suitably change and combination within not breaking away from content of the present invention, spirit and scope, realizes and apply the technology of the present invention.
The invention provides a kind of extracting method of Pericarpium Kaki extract, comprising:
Step 1: Pericarpium Kaki dry powder is pulverized, sieves, made to Pericarpium Kaki, through 60 ℃ of oven dry 10h;
Step 2: in g/mL, in Pericarpium Kaki dry powder, according to mass volume ratio, add the aqueous acetone solution that volume fraction is 50% at 1: 12, at 45 ℃ of water-bath lucifuge lixiviate 2h, filter, obtain the first filtrate; Collect filter residue and add by mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 6 again, extract 1h, obtain the second filtrate; The first filtrate, the second filtrate are mixed, and distillation obtains concentrated solution, obtains the Pericarpium Kaki extract after lyophilize.
The present invention also provides the Pericarpium Kaki obtained by said extracted method extract.
The present invention also provides the Pericarpium Kaki extract to absorb formaldehyde in preparation, has eliminated the application in stink or antibacterial paint additive.
The present invention also provides a kind of coating, comprises the Pericarpium Kaki extract, acceptable auxiliary agent in emulsion, titanium dioxide, coarse whiting, calcined kaolin, talcum powder and coating; Pericarpium Kaki dry powder is pulverized, sieves, made to described Pericarpium Kaki extract through 60 ℃ of oven dry 10h,, in g/mL by Pericarpium Kaki, add according to mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 12 in Pericarpium Kaki dry powder, at 45 ℃ of water-bath lucifuge lixiviate 2h, filter, obtain the first filtrate; Collect filter residue and add by mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 6 again, extract 1h, obtain the second filtrate; The first filtrate, the second filtrate are mixed, and distillation obtains concentrated solution, after lyophilize, makes.
As preferably, coating provided by the invention, by weight percentage, contain Pericarpium Kaki extract 1～3%.
As preferably, described coating is water soluble paint.
As preferably, in described coating, acceptable auxiliary agent comprises one or more the mixture in thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, ethylene glycol, sanitas, mould inhibitor.
Acrylate and vinyl acetate emulsion claims again vinyl acetate emulsion, is to take the aqueous high molecular resin that vinyl acetate between to for plastic and butyl acrylate form as the major function monomer copolymerization.
In coating provided by the invention, acrylate and vinyl acetate emulsion be take vinyl acetate between to for plastic and butyl acrylate and is formed as monomer copolymerization.
As preferably, the glass transition temp of acrylate and vinyl acetate emulsion (Tg) is 10～20 ℃.
Preferably, the glass transition temp of acrylate and vinyl acetate emulsion (Tg) is 18 ℃.
As preferably, the minimum film-forming temperature of acrylate and vinyl acetate emulsion (MFT) is 5～6 ℃.
Preferably, in coating provided by the invention, the acrylate and vinyl acetate emulsion outward appearance becomes milky white liquid, and solids content is 54～58%, is preferably 55%; Brookfield viscosity is 150～1600cp.s (3/60rpm/25 ℃); Average particle diameter is 0.18～0.45 μ m, is preferably 0.18～0.3 μ m; PH value (25 ℃) is 3.5～5.0 (25 ℃); Ion characteristic is negatively charged ion; Free monomer (% by weight)<0.3; Glass transition temp (Tg) is 18 ℃; Minimum film-forming temperature (MFT) is 6 ℃; Wet proportion is 1.03～1.08; Dry proportion is 1.07～1.13.In coating provided by the invention, in acrylate and vinyl acetate emulsion, not containing APEO, do not contain formaldehyde yet.
Benzene emulsion (cinnamic acrylic ester emulsion) is to be made through emulsion copolymerization by vinylbenzene and acrylate monomer.Its solids content 40～50%, viscosity 800～2000mPas, it is 8～9 that level of residual monomers is less than 0.5%, pH value.Benzene emulsion sticking power is good, and glued membrane is transparent, and water-fast, oil resistant, heat-resisting, ageing-resistant performance is good.Specifically can be selected from silicone modified styrene-acrylate emulsion, organic fluorine modifying cinepazid emulsion.
Thickening material claims again jelling agent, can improve system viscosity, makes system keep even, stable suspended state or milkiness state, or forms gel.In emulsion paint is manufactured, thickening material plays many-sided coordinative role to the thickening of emulsion paint, the stable rheological property that reaches.In pigment, fillers dispersed stage, improve the viscosity of dispersed material and be beneficial to dispersion; Improve paint stability in storage and transport process, prevent that pigment, filler from sinking to the bottom caking; Regulate the emulsion paint viscosity in construction, and present good rheological property etc.
Thickening material belongs to hydrophilic macromolecular compounds mostly, by sources is divided into animal class, plant, mineral substance, synthetic class or semi-synthetic class.Within simple minute, can be divided into natural and synthetic two large classes.Natural product great majority are to produce from plant and seaweeds containing the polyose viscous substance, as starch, pectin, agar, gelatin, marine alga fat, carrageenin, dextrin, tragacanth gum, polysaccharide element derivative etc.; Synthetics has the derivatived celluloses such as methylcellulose gum, carboxymethyl cellulose, starch derivative, casein food grade, sodium polyacrylate, polyoxyethylene, polyvinylpyrrolidone, polyvinyl alcohol, low-molecular polyethylene wax, polyacrylamide etc.
Thickening material commonly used has ether of cellulose and derivatives class, association type alkali swelling thickening material and polyurethane thickener.(1) ether of cellulose and derivative thereof: ether of cellulose and derivatives class thickening material thereof mainly contain Natvosol, methyl hydroxyethylcellulose, Type 3U, methylhydroxypropylcellulose etc.The hydrophobically modified Mierocrystalline cellulose is to introduce a small amount of long-chain hydrophobic alkyl on the Mierocrystalline cellulose hydrophilic skeleton, thereby becomes associative thickener, and the ether of cellulose thickening material kind that its thickening effectiveness can be much bigger with relative molecular mass is suitable.(2) alkali swelling type thickening material: alkali swelling thickening material is divided into two classes: non-association type alkali swelling thickening material and association type alkali swelling thickening material.(3) the non-polyurethane thickener of polyurethane thickener and hydrophobically modified: polyurethane thickener is a kind of hydrophobic grouping modification oxyethyl group urethane water-soluble polymers, belongs to the non-ionic type associative thickener.Eco-friendly association type polyurethane thickener exploitation is generally paid attention to, and except the linear association type polyurethane thickener of introducing above, also has pectination associative polyurethane thickening material.In coating provided by the invention, the thickening material of interpolation is not done restriction.
Natvosol (HEC), be a kind of white or faint yellow, by alkali cellulose and oxyethane (or chloroethanol), through etherification reaction, prepared by tasteless, nontoxic fibrous or pulverulent solids, belongs to non-ionic type soluble fiber element ethers.There is following character: 40 order sieving rates >=99; Softening temperature: 135～140 ℃; Performance density: 0.35～0.61g/mL; Decomposition temperature: 205～210 ℃; Combustionvelocity is slower; Balance is measured containing temperature: 23 ℃; During 50%rh 6%, during 84%rh 29%.
Because HEC has good thickening, suspension, dispersion, emulsification, bonding, film forming, protection moisture and the characteristics such as protective colloid are provided, the fields such as oil production, coating, building, medicine food, weaving, papermaking and macromolecular polymerization reaction have been widely used in.Natvosol, as a kind of tensio-active agent of non-ionic type, also has following character: HEC and dissolves in hot water or cold water, and high temperature or boil does not precipitate, and makes it have large-scale solvability and viscosity characteristics, and non-thermal gelation; Non-ionic type own can with on a large scale in other water-soluble polymerss, tensio-active agent, salt coexist, and are a kind of good colloid thickening materials containing high density electrolysis matter solution; Water retention capacity exceeds one times than methylcellulose gum, has flow adjustment preferably; The dispersive ability of HEC is compared dispersive ability with Vltra tears with generally acknowledged methylcellulose gum slightly poor, but the protective colloid ability is stronger.
Therefore, in coating provided by the invention, the preferred Natvosol of thickening material (HEC).
The coating multifunctional assistant is the indispensable component of coating, and it can improvement of production process, keeps shelf-stable, improves execution conditions, improves the quality of products, and gives specific function.Rationally correctly select multifunctional assistant to reduce costs, increase economic efficiency.The multifunctional assistant added in coating provided by the invention is not construed as limiting.
AMP-95 is a kind of 5% moisture content-2-amino-2-methyl-1-propanol that contains, and is also that current minority has one of lower molecular weight and overbasic industrial amine.Use the multifunctional assistant of AMP-95 as waterborne polymeric, except improving coating property, also can greatly reduce costs, because other amine of required amount ratio of AMP-95 is much lower.Not only have the excellent functions such as dispersion, thickening, adjusting pH value, nondiscoloration, but also possess antimicrobial (sterilization) characteristic, also can reduce VOC (volatile organic compounds) total amount, contribute to the enhancing ring guaranteed cost simultaneously.In view of the foregoing, as preferably, in coating provided by the invention, add the AMP-95 multifunctional assistant.
The outward appearance of wetting dispersing agent is limpid yellow liquid; Activated feedstock is a kind of modified polypropene acid sodium-salt; The content of active ingredient is 39～41%; Solids content is 40～45%; Ion characteristic is negatively charged ion; The pH value is 7.0～9.0.Mineral dye is had to remarkable wetting and dispersive ability as ferric oxide and titanium dioxide etc.; Can improve colouring intensity, pigment stability in storage; Strengthen water-base resin and emulsion consistency in alkaline medium; There is good water-repellancy; Preferred wetting dispersing agent has not containing alkylphenol ethoxylate, not containing advantages such as solvents.The wetting dispersing agent added in coating provided by the invention is not construed as limiting.
As preferably, in coating provided by the invention, add Akzo Nobel 645 as wetting dispersing agent, it is a kind of vinylformic acid sodium salt homopolymer.
Defoamer, be called again kilfoam, in industrial process, can produce many harmful foams, needs to add defoamer.Be widely used in removing the harmful foam produced in the industry production processes such as latex, textile sizing, food fermentation, biological medicine, coating, petrochemical complex, papermaking, industry cleaning link.
The composition of defoamer: (1) active ingredient, effect: broken bubble, froth breaking reduce surface tension; Representative: silicone oil, polyethers, higher alcohols, mineral oil, plant wet goods.(2) emulsifying agent, effect: make activeconstituents be dispersed into small-particle, be convenient to be dispersed in water, better play froth breaking, press down the bubble effect.Representative: the ninth of the ten Heavenly Stems (suffering) base phenol polyethenoxy ether, soap salt, op series etc., tween series, this dish series etc.(3) carrier, effect: contribute to the combination of carrier and bubbling system, be easy to be distributed in bubbling system, both are combined, the surface tension of itself is low, contributes to press down bubble, and can reduce costs.Representative: the solvent beyond dewatering, as aliphatic hydrocarbon, aromatic hydrocarbon, oxo solvent etc.(4) emulsion adjuvant, effect: make emulsifying effectiveness better.Representative: dispersion agent: water drain silica etc.; Tackifier: CMC, polyvinyl ether etc.The defoamer added in coating provided by the invention is not construed as limiting.
As preferably, in coating provided by the invention, add the CF-246 of England Blackburn company as defoamer.
Film coalescence aid claims again coalescing aid, can promote macromolecular compound plastic flow and recoverable deformation, improves coalescent performance, and the material of film forming in more extensive construction temperature scope is a kind of evanescent softening agent.Commonly used is the strong solvent of ether alcohol class superpolymer, as propandiol butyl ether, 1-Methoxy-2-propyl acetate etc.General emulsion has film-forming temperature, when envrionment temperature during lower than the emulsion film forming temperature emulsion be difficult for film forming, film coalescence aid can improve emulsion film forming mechanism, helps film forming.After film forming, the film coalescence aid volatilization, can not affect the characteristic of filming.In industry, film coalescence aid commonly used is alcohol ester-12 at present, the TEXNAL of Yi Siman.The film coalescence aid added in coating provided by the invention is not construed as limiting.
As preferably, in coating provided by the invention, add the alcohol ester-12 of Mitsui company as film coalescence aid.
Ethylene glycol (ethylene glycol) has another name called " glycol ", " 1,2 ethylene glycol ", is called for short EG.Molecular formula is C
2h
6o
2, chemical formula is (HOCH
2)
2, molecular weight is 62.07, is the simplest dibasic alcohol.Ethylene glycol is no color or smell, pleasantly sweet liquid, can dissolve each other with water, acetone, but solubleness is less in ethers, can be used as the raw material of solvent, frostproofer and synthetic terylene.In coating, mainly as antifreezing agent and solubility promoter, use.
The titanium dioxide formal name used at school is titanium dioxide (Titanium Dioxide), and molecular formula is TiO
2, relative molecular mass 79.90.The titanium dioxide stable chemical nature, do not react with most of material in the ordinary course of things, belongs to inert pigment, is considered at present the best a kind of white pigment of performance in the world.It has three kinds of crystallizations: plate titanium type, sharp titanium and rutile-type.Plate titanium type is unsettled crystal formation, without industrial utilization, be worth, anatase titanium dioxide (Anatase) is called for short the A type, and rutile-type (Rutile) is called for short the R type, all there is stable lattice, be important white pigment and porcelain glaze, with other white pigments, superior whiteness, tinting strength, opacifying power, weathering resistance, thermotolerance and chemical stability relatively arranged, particularly there is no toxicity.
Titanium dioxide is a kind of intermediate oxide of slant acidity, under normal temperature, with other elements and compound, react hardly, all inoperative to oxygen, ammonia, nitrogen, hydrogen sulfide, carbonic acid gas, sulfurous gas, water insoluble, fatty, also be insoluble to diluted acid and mineral acid, alkali, only be dissolved in hydrofluoric acid.But, under light action, continuous redox reaction can occur in titanium dioxide, has photochemical activity.This kind of photochemical activity, under uviolizing, anatase thpe white powder is particularly evident, even this character makes the photosensitized oxidation catalyzer of some mineral compound of titanium dioxide, is again some organic compound sensitized catalyzer.
Titanium dioxide is widely used at coating industry, and Rutile type Titanium Dioxide is particularly most ofly consumed by coatings industry.The coating of manufacturing with titanium dioxide, bright in luster, opacifying power is high, strong coloring force; low-consuming, wide in variety, can play a protective role to the stability of medium, and can strengthen physical strength and the sticking power of paint film; prevent crackle, prevent that ultraviolet ray and moisture from seeing through, and extends the paint film life-span.
The titanium dioxide size-grade distribution is a comprehensive index, and it has a strong impact on titanium white powder pigment performance and product application performance, therefore, for opacifying power and dispersed discussion, can directly from size-grade distribution, be analyzed.The factor that affects the titanium dioxide size-grade distribution is comparatively complicated, is at first the size of hydrolysis initial size, by controlling and regulating the hydrolysis process condition, makes initial size within the specific limits.Next is calcining temperature, and metatitanic acid is in the process of calcining, and particle experiences a transformation of crystal phase and growth stage, controls suitable temperature, makes to grow up particle within the specific limits.Be exactly finally the pulverizing of product, usually to the transformation of Raymond mill and the adjusting of analyzer rotating speed, control and pulverize quality.The titanium dioxide added in coating provided by the invention is not construed as limiting.
As preferably, in coating provided by the invention, the rutile titanium white powder that to add granularity be 0.2 μ m is as titanium dioxide.
Water-ground limestone, be called for short coarse whiting, by the natural carbonate mineral, as calcite, marble, Wingdale grind, formed.Because its settling volume (1.1-1.9mL/g/) is less than the light calcium carbonate settling volume (2.4-2.8mL/g) of producing by chemical process, therefore be called as water-ground limestone.Water-ground limestone is powdery mineral filler commonly used, have that chemical purity is high, inertia is large, be difficult for chemical reaction, Heat stability is good, can not decomposing below 400 ℃, whiteness is high, oil absorbency is low, refractive index is low, matter is soft, dry, do not hang down the advantages such as wear(ing)value is little, nontoxic, tasteless, odorless, good dispersity containing crystal water, hardness.
By weight percentage, contain CaCO in water-ground limestone
399.7%, Fe
2o
3≤ 0.005%, SiO
20.1%, Al
2o
3≤ 0.15%, whiteness 95%, 18～5 μ m.For white non-opaque pigment and filler, opacifying power is stronger, good dispersity.Because the calcium carbonate color is white, relative latex in coating, the solvent price is all cheap, and particle is thin, can be dispersed in coating, so be a large amount of pigment extenders that use.Along with the raising of environmental consciousness, architectural coating is used water-borne coatings in a large number, and calcium carbonate is due to hydrophilic, and low price, be widely used.Inserting of calcium carbonate can strengthen deposition and the perviousness of priming paint to substrate surface.In paste paint, calcium carbonate can make coating thickening, thickening, plays a kind of effect of filling and fill.So usually add water-ground limestone and light calcium carbonate in paste paint, add water-ground limestone and can reach 24.6～78.5%.In finish paint,, in finishing paint, half light and lustreless paint will adopt increases the way that pigment extender is cut down gloss, and calcium carbonate is exactly desirable delustring filler.Calcium carbonate can be used as wherein a kind of additive and brings into play its effect in multicolor finish, reaches and both reduces material cost, can improve again the purpose of decorative effect.Available light calcium carbonate in multicolor finish, i.e. precipitated chalk, its oil number is 80% left and right, granularity 15 μ m left and right, proportion 2.7 left and right, refractive index is 1.60 left and right.Also available water-ground limestone (calcite in powder) is that the grindings such as natural product marble form.In metal anti-corrosion paint, the suitable consumption of calcium carbonate is 30%.In metal anti-corrosion paint, calcium carbonate is pigment extender, also has rust inhibition.
Water-ground limestone is divided into corase grind calcium carbonate (>3 μ m), fine grinding calcium carbonate (1～3 μ m), calcium carbonate superfine powder (0.5～1 μ m) by its original median size (d).Can be selected as required.The coarse whiting added in coating provided by the invention is not construed as limiting.
As preferably, in coating provided by the invention, add 600 order coarse whitings.
Calcined kaolin can be applicable to coating, papermaking, rubber and plastics pottery etc., and wherein paint and coating are the topmost Application Areass of China's high-quality calcined kaolin, account for respectively 60% and 30% left and right of domestic ultra-fine high-brightness high grade kaolinite consumption.With calcined kaolin not, compare, low temperature calcination is kaolinic to be reduced in conjunction with water-content, silicon-dioxide and alchlor content all increase, and active site increases, and structure changes, particle diameter is less and even, fill the NR sizing material with calcined kaolin not and compare, it is basically identical that low temperature calcination kaolin is filled the vulcanization characteristics curve of NR sizing material, and your the A type hardness tester that continues is constant, tensile strength improves, and both physicalies all reach the requirement of the nontransparent sole industry standard of sports shoes.The calcined kaolin added in coating provided by the invention is not construed as limiting.
As preferably, in coating provided by the invention, add 3000 order ground calcined kaolins.
Talcum powder, for white or off-white color, fine, without the powder of grittiness, molecular weight is 260.8617, hand touches with greasy feeling.Odorless, tasteless.In water, the acid of rare ore deposit or rare alkali hydroxide solution, all do not dissolve.Talcous main component is the moisture Magnesium Silicate q-agent of talcum, and molecular formula is Mg
3[Si
4o
10] (OH)
2.Belong to oblique system.Crystal is the sheet of false six sides or rhombus, is generally fine and close bulk, foliated lamellar, radial, fibrous agrregate, crystal water white transparency or white, but because containing a small amount of impurity, presenting even light red of light green, pale yellow, shallow palm fibre; Be pearliness on cleavage surface.Hardness is close to 1, and proportion is 2.7～2.8.Good physics, the chemical propertys such as talcum has oilness, anti-sticks, helps that stream, resistivity against fire, resistance to acid, insulativity, fusing point are high, chemical torpescence, opacifying power are good, softness, good luster, adsorptive power are strong.The talcum powder kind of adding in coating provided by the invention is not construed as limiting.
Sanitas refers to the medicament of natural or synthetic chemical composition inhibitory substance corruption, to take the microbial growth that corrupt substance is metabolism substrate, has lasting restraining effect.It can suppress the most incident Putrefaction under different situations, particularly when general sterilization functions is insufficient, still has the effect of persistence.It is added to food, medicine, pigment, biological sample etc., the corruption caused to postpone microorganism growth or chemical transformation.Nitrite and sulfurous gas are one of sanitass commonly used.To fiber and Dormant oils, coal tar, tannin for the preservation of timber against decay, to formaldehyde, mercuric chloride, toluene, butyl p-hydroxybenzoate, nitrofurazone derivative or face cream resinoid for biological sample.
In coating industry, sanitas is generally selected the isothiazolinone of Kathon CG class and the mixture of methylisothiazolinone, also has in addition benzisothiazole-3-ketone.
Isothiazolinone is a kind of wide spectrum, efficient, low toxicity, non-oxidative bactericide, mainly by CMIT (CMI) and MIT (MI), formed, work to kill livestock acting on by the key that disconnects bacterium and algae protein matter.It can promptly irreversibly suppress its growth with after microorganism contacts, thereby causes the death of microorganism cells, therefore common bacteria, fungi, algae etc. are had to very strong inhibition and killing action.The efficiency of killing livestock is high, and degradation property is good, has the characteristics such as do not produce residual, operational safety, compatibleness is good, stability is strong, use cost is low.Can be miscible with chlorine and most of yin, yang ion and nonionogenic tenside.During high dosage, isothiazolinone has been peeled off unusual effect to biological clay.
Methylisothiazolinone is a kind of efficient germicide, and heat-resisting water-borne preservative has good effect for suppressing microbial growth, can anti-bacteria, the growth of fungi, mould and mould.
Benzisothiazole-3-ketone has good bactericidal property; under acid and alkaline environment, all can use; be to still have fabulous stability at 180 ℃, have its configuration product of good safety performance good stability is arranged, it can provide long protection to material system.And do not contain heavy metal, chlorine, formaldehyde and inorganic salt.
All contain formaldehyde in a lot of sanitass, as preferably, in coating provided by the invention, add Tao Shi LXE containing formaldehyde as sanitas.
Mould inhibitor refers to that mould is had and kills or restraining effect, prevents the preparation that application goes mouldy.Phenols (as phenol), chlorophenols (as Pentachlorophenol), organic mercury salt (as phenyl mercury oleate), organic copper salt (as copper 8-quinolinolate), organic tin salt (as chlorination three second or tributyl tin etc.) are arranged, reach inorganic salt copper sulfate, mercury chloride, Sodium Fluoride etc.Be mainly used in plastics, rubber, textiles, paint and insulating material etc.The kind of the mould inhibitor added in coating provided by the invention is not construed as limiting.
As preferably, in coating provided by the invention, add Ke Laien DFX-1 as mould inhibitor.
Preferably, coating provided by the invention, by weight percentage, comprise: Pericarpium Kaki extract 1～3%, acrylate and vinyl acetate emulsion or benzene emulsion 23.5～44%, Natvosol thickening material 0.3～0.9%, AMP-95 multifunctional assistant 0.05～0.15%, wetting dispersing agent 0.3～0.6%, defoamer 0.2～0.4%, film coalescence aid 0.8～1.5%, ethylene glycol 1～1.5%, titanium dioxide 5～15%, coarse whiting 10～30%, calcined kaolin 5～15%, talcum powder 2～8%, sanitas 0.1～0.3%, mould inhibitor 0.1～0.3%.
The extracting method of Pericarpium Kaki extract provided by the invention, by by the Pericarpium Kaki drying, pulverize, sieve, make Pericarpium Kaki dry powder, then obtain the Pericarpium Kaki extract with acetone extract.Pericarpium Kaki extract provided by the invention is natural plant extracts,, containing the artificial chemistry product, does not have removing formaldehyde, eliminates stink, and effect such as antibacterial grade, can be used as paint additive, and, because it can be miscible with multiple coating, can be prepared into water-borne coatings.
Coating provided by the invention, self is release formaldehyde not, and the content of organic volatile gas (VOC) is lower, and quality meets national standard; Evidence, coating provided by the invention is anti-bacteria effectively, and bacteriostasis rate is greater than 99.99%, and the formaldehyde clearance is 93.16～95.97%; Interiro wall latex paint provided by the invention is 68.79～73.17% to the clearance of VOC, wherein, to the clearance of benzene, is 63.14～73.06%, can continuous and effective must remove airborne formaldehyde and other organic volatile gas (VOC).
In coating provided by the invention, each composition all can be buied by market.Wherein, titanium dioxide: the rutile titanium white powder that company of U.S. Du side produces; 600 order coarse whitings: the water-ground limestone that Guangdong Dongfanghong powder company limited produces; Acrylate and vinyl acetate emulsion, benzene emulsion: LG-DOW company produces; Film coalescence aid: Mitsui company produces; The AMP-95 multifunctional assistant: U.S. An Ge company produces; Sanitas, mould inhibitor: German Clariant company produces.
Below in conjunction with embodiment, further set forth the present invention:
The extraction of embodiment 1 Pericarpium Kaki extract
Accurately take Pericarpium Kaki 100g, Pericarpium Kaki dry powder 92.8g is pulverized, sieves, made to Pericarpium Kaki, through 60 ℃ of oven dry 10h; Add according to mass volume ratio the aqueous acetone solution 1113.6mL that volume fraction is 50% at 1: 12 in Pericarpium Kaki dry powder, at 45 ℃ of water-bath lucifuge lixiviate 2h, filter, collect the first filtrate 989.4mL; Collect filter residue 85.6g and add by mass volume ratio the aqueous acetone solution 513.6mL that volume fraction is 50% at 1: 6, extract 1h, obtain the second filtrate 482.7mL; After the first filtrate, the second filtrate are mixed, distillation obtains concentrated solution, obtains Pericarpium Kaki extract 79.5g after lyophilize, and the extraction yield of Pericarpium Kaki extract is 79.5%.
The extraction of embodiment 2 Pericarpium Kaki extracts
Accurately take Pericarpium Kaki 200g, Pericarpium Kaki dry powder 183.7g is pulverized, sieves, made to Pericarpium Kaki, through 60 ℃ of oven dry 10h; Add according to mass volume ratio the aqueous acetone solution 2204.4mL that volume fraction is 50% at 1: 12 in Pericarpium Kaki dry powder, at 45 ℃ of water-bath lucifuge lixiviate 2h, filter, collect the first filtrate 2008.5mL; Collect filter residue 173.1g and add by mass volume ratio the aqueous acetone solution 1038.6mL that volume fraction is 50% at 1: 6, extract 1h, obtain the second filtrate 879.4mL; After the first filtrate, the second filtrate are mixed, distillation obtains concentrated solution, obtains Pericarpium Kaki extract 160.2g after lyophilize, and the extraction yield of Pericarpium Kaki extract is 80.1%.
Embodiment 3 Pericarpium Kaki extractive type deodorant gas, except effect of formaldehyde check
The Pericarpium Kaki extract that embodiment 1, embodiment 2 are provided carries out routine to be identified, result shows, contains the Pericarpium Kaki polyphenol in the Pericarpium Kaki extract, and the content of Pericarpium Kaki polyphenol is 79.9～83.5%.
The Pericarpium Kaki extract 10g that taking the embodiment of the present invention 1 provides removes foul smell, removes the effect of formaldehyde check.
The mensuration of ammonia, Trimethylamine 99, indoles, formaldehyde: use headspace gas chromatography.
Test group: in the 100mL injection bottle that is added with in advance the Pericarpium Kaki extract 10g that the embodiment of the present invention 1 provides, inject respectively the water saturation solution of ammonia, Trimethylamine 99, indoles, formaldehyde, after 12h, draw 1mL bottle head space gas sampling, obtain the test group peak height;
Blank group: in the 100mL injection bottle that does not add the Pericarpium Kaki extract that the embodiment of the present invention 1 provides, inject respectively the water saturation solution of Trimethylamine 99, formaldehyde, indoles, after 12h, draw 1mL bottle head space gas sampling, obtain blank group peak height;
Wherein, the Pericarpium Kaki extract that the embodiment of the present invention 1 provides is 49.12% to the clearance of ammonia, to the clearance of Trimethylamine 99, is 54.79%, to the clearance of indoles, is 46.58%, and the clearance of PARA FORMALDEHYDE PRILLS(91,95) is 73.21%.
According to above-mentioned test method, being verified except foul smell, except effect of formaldehyde of the Pericarpium Kaki extract that the embodiment of the present invention 2 is provided, result shows, the Pericarpium Kaki extract that the embodiment of the present invention 2 provides is 53.04% to the clearance of ammonia, clearance to Trimethylamine 99 is 55.17%, clearance to indoles is 52.03%, and the clearance of PARA FORMALDEHYDE PRILLS(91,95) is 79.65%.
Comprehensive above-mentioned test-results, Pericarpium Kaki extract provided by the invention has better except foul smell, except effect of formaldehyde.
Embodiment 4 coating that contains the Pericarpium Kaki extract provided by the invention
Accurately take the Pericarpium Kaki extract 1.0g that the embodiment of the present invention 1 provides, acrylate and vinyl acetate emulsion 24.5g, Natvosol thickening material 0.3g, AMP-95 multifunctional assistant 0.05g, wetting dispersing agent 0.3g, defoamer 0.2g, film coalescence aid 0.8g, ethylene glycol 1.5g, titanium dioxide 5g, 600 order coarse whiting 30g, calcined kaolin 5g, talcum powder 2g, sanitas 0.1g, mould inhibitor 0.1g, measure 29.15mL water.
First at stirring tank, first add water, then order adds Natvosol thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, middling speed dispersion after ethylene glycol; Then add titanium dioxide, 600 order coarse whitings, the Pericarpium Kaki extract that the embodiment of the present invention 1 provides, calcined kaolin, after talcum powder, high speed dispersion to fineness is less than 50 μ m; Add acrylate and vinyl acetate emulsion after turning low speed, sanitas, mould inhibitor stirs, and obtains.
Embodiment 5 coating that contains the Pericarpium Kaki extract provided by the invention
Accurately take the Pericarpium Kaki extract 2.0g that the embodiment of the present invention 2 provides, benzene emulsion 25g, Natvosol thickening material 0.5g, AMP-95 multifunctional assistant 0.15g, wetting dispersing agent 0.45g, defoamer 0.4g, film coalescence aid 1.5g, ethylene glycol 1.2g, titanium dioxide 15g, 600 order coarse whiting 20g, calcined kaolin 15g, talcum powder 8g, sanitas 0.3g, mould inhibitor 0.3g, measure 10.2mL water.
First at stirring tank, first add water, then order adds Natvosol thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, middling speed dispersion after ethylene glycol; Then add titanium dioxide, 600 order coarse whitings, the Pericarpium Kaki extract that the embodiment of the present invention 2 provides, calcined kaolin, after talcum powder, high speed dispersion to fineness is less than 50 μ m; Add benzene emulsion after turning low speed, sanitas, mould inhibitor stirs, and obtains.
Embodiment 6 coating that contains the Pericarpium Kaki extract provided by the invention
Accurately take the Pericarpium Kaki extract 3.0g that the embodiment of the present invention 1 provides, acrylate and vinyl acetate emulsion 28.2g, Natvosol thickening material 0.5g, AMP-95 multifunctional assistant 0.1g, wetting dispersing agent 0.6g, defoamer 0.3g, film coalescence aid 1g, ethylene glycol 1.5g, titanium dioxide 10g, 600 order coarse whiting 28g, calcined kaolin 10g, talcum powder 5g, sanitas 0.2g, mould inhibitor 0.2g, measure 11.4mL water.
First at stirring tank, first add water, then order adds Natvosol thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, middling speed dispersion after ethylene glycol; Then add titanium dioxide, 600 order coarse whitings, the Pericarpium Kaki extract that the embodiment of the present invention 1 provides, calcined kaolin, after talcum powder, high speed dispersion to fineness is less than 50 μ m; Add acrylate and vinyl acetate emulsion after turning low speed, sanitas, mould inhibitor stirs, and obtains.
Embodiment 7 coating that contains the Pericarpium Kaki extract provided by the invention
Accurately take the Pericarpium Kaki extract 2.5g that the embodiment of the present invention 2 provides, benzene emulsion 32.3g, Natvosol thickening material 0.9g, AMP-95 multifunctional assistant 0.15g, wetting dispersing agent 0.5g, defoamer 0.35g, film coalescence aid 1.4g, ethylene glycol 1g, titanium dioxide 8g, 600 order coarse whiting 10g, calcined kaolin 12g, talcum powder 4g, sanitas 0.1g, mould inhibitor 0.1g, measure 26.7mL water.
First at stirring tank, first add water, then order adds Natvosol thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, middling speed dispersion after ethylene glycol; Then add titanium dioxide, 600 order coarse whitings, the Pericarpium Kaki extract that the embodiment of the present invention 2 provides, calcined kaolin, after talcum powder, high speed dispersion to fineness is less than 50 μ m; Add benzene emulsion after turning low speed, sanitas, mould inhibitor stirs, and obtains.
Embodiment 8 coating that contains the Pericarpium Kaki extract provided by the invention
Accurately take the Pericarpium Kaki extract 1.5g that the embodiment of the present invention 1 provides, acrylate and vinyl acetate emulsion 23.5g, Natvosol thickening material 0.7g, AMP-95 multifunctional assistant 0.05g, wetting dispersing agent 0.4g, defoamer 0.25g, film coalescence aid 1.2g, ethylene glycol 1.2g, titanium dioxide 13g, 600 order coarse whiting 30g, calcined kaolin 8g, talcum powder 6g, sanitas 0.2g, mould inhibitor 0.2g, measure 13.8mL water.
First at stirring tank, first add water, then order adds Natvosol thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, middling speed dispersion after ethylene glycol; Then add titanium dioxide, 600 order coarse whitings, the Pericarpium Kaki extract that the embodiment of the present invention 1 provides, calcined kaolin, after talcum powder, high speed dispersion to fineness is less than 50 μ m; Add acrylate and vinyl acetate emulsion after turning low speed, sanitas, mould inhibitor stirs, and obtains.
Embodiment 9 coating that contains the Pericarpium Kaki extract provided by the invention
Accurately take the Pericarpium Kaki extract 1.0g that the embodiment of the present invention 2 provides, benzene emulsion 44g, Natvosol thickening material 0.7g, AMP-95 multifunctional assistant 0.05g, wetting dispersing agent 0.6g, defoamer 0.25g, film coalescence aid 1.2g, ethylene glycol 1.2g, titanium dioxide 13g, 600 order coarse whiting 10g, calcined kaolin 8g, talcum powder 2g, sanitas 0.2g, mould inhibitor 0.2g, measure 15.8mL water.
First at stirring tank, first add water, then order adds Natvosol thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, middling speed dispersion after ethylene glycol; Then add titanium dioxide, 600 order coarse whitings, the Pericarpium Kaki extract that the embodiment of the present invention 2 provides, calcined kaolin, after talcum powder, high speed dispersion to fineness is less than 50 μ m; Add benzene emulsion after turning low speed, sanitas, mould inhibitor stirs, and obtains.
The quality of 10 pairs of coating provided by the invention of embodiment is detected
The coating that the embodiment of the present invention 4 to 9 provides send national building materials test center, and detected result is in Table 1.
Table 1 coating purifying formaldehyde provided by the invention rate detects
The quality of 11 pairs of coating provided by the invention of embodiment is detected
According to the detection method of limits of harmful substances national standard in GB18582-2008 indoor decorating and refurnishing materials interior wall coating, it is that beam chemistry institute Institute of Analysis is detected that the coating that the embodiment of the present invention 4 to 9 is provided is delivered Beijing, the results are shown in Table 2.
Table 2 coating objectionable impurities provided by the invention detects
As shown in Table 2, coating provided by the invention all meets national standard.
The quality of 12 pairs of coating provided by the invention of embodiment is detected
It is that beam chemistry institute Institute of Analysis is detected that the coating that the embodiment of the present invention 4 to 9 is provided is delivered Beijing, the results are shown in Table 3.
Table 3 coating microorganism detection provided by the invention
As shown in Table 3, the coating that the embodiment of the present invention 4 to 9 provides has restraining effect preferably to bacterium, and streptococcus aureus, colibacillary inhibiting rate all are greater than to 99.99%.
Embodiment 13 detects the formaldehyde removal effect of coating provided by the invention
Handled object is as timber (building materials such as main adhesive plate, fiberboard or decorative sheet), paper, fiber, fibre product, resin forming product etc.
By the coating made in embodiment 4 to 9, according to the measuring method of following burst size of methanal, the formaldehyde performance of removing of coating provided by the invention is estimated.
The preparation of test film: the two sides 6 F2 adhesive plates (specification is 35cm * 35cm * 0.55cm), evenly apply respectively the coating that embodiment 4 to 9 makes, after drying at room temperature, in the plastics bag of packing into, sealing 24h.From the F2 adhesive plate that is coated with the coating that embodiment 4 to 9 makes, with 15cm * 5cm * 0.55cm, be cut into test film.
The preparation of comparison film: from the F2 adhesive plate of uncoated coating provided by the invention, according to 15cm * 5cm * 0.55cm, be cut into comparison film.
Crystallizing dish (the diameter 120mm that fills 300mL distilled water is placed in bottom at moisture eliminator (the about 10L of big or small 240mm, internal volume that meets JIS R3503 regulation), high 60mm), be covered with porcelain plate above it, place respectively above-mentioned test film and comparison film, place 24h in 20～25 ℃, the formaldehyde absorption that the F2 adhesive plate is separated out in distilled water as test soln.
In test soln, concentration of formaldehyde is measured with luminous point colorimeter colorimetric assay according to acetylacetone method.
The formaldehyde diffusing capacity that formaldehyde diffusing capacity (mg/L) is comparison film.
The formaldehyde diffusing capacity of formaldehyde diffusing capacity-comparison film that formaldehyde reduction (mg/L) is test film.
Formaldehyde is removed rate (%)=formaldehyde reduction (mg/L)/formaldehyde diffusing capacity (mg/L) * 100.
The results are shown in Table 4.
Table 4 coating provided by the invention is except effect of formaldehyde
As shown in Table 4, the coating release formaldehyde amount that the embodiment of the present invention 4 to 9 provides is few, and the rate of removing of formaldehyde reaches 93.16～95.96%, can effectively remove the formaldehyde that upholstery and furniture are separated out.
Embodiment 14 detects the formaldehyde removal effect of coating provided by the invention
The wood-based plate of 7 25cm * 25cm (seven lis of plates) is put into respectively to the encloses container of 20L, after 24h, with 4160 type Formaldehyde instrument, measured and record two concentration of formaldehyde values in encloses container; Then take out wood-based plate, will be wherein one apply common coating (not adding Pericarpium Kaki extract provided by the invention, the auxiliary agent in the coating that the auxiliary agent in coating provides with embodiment 4 to 9) as a control group, every 1h, apply one time, apply altogether 3 times; All the other 6 reach respectively as test group the coating that the embodiment of the present invention 4 to 9 provides, and every 1h, apply one time, apply altogether 3 times.Put into again encloses container after the 24h finish-drying, after airtight 24h, then measure and record the concentration of formaldehyde value in encloses container with 4160 type Formaldehyde instrument.After 36h, 48h, 60h, 72h, 5d, 7d, 11d, 18d, 30d, 60d, 90d, measure and record concentration of formaldehyde respectively.
Detecting instrument: be the U.S.'s 4160 type Formaldehyde instrument that the national standard metering is assert, display density value numeral in the time of detection.The numerical value that 4160 type Formaldehyde instrument are measured and the deviation of laboratory chemical process detected value, generally in 5%.
Measure numerical standard: the content of measured value formaldehyde in indoor air is international standard value ppm, and applicable China standard need be converted into milligram value (mg/m
3).
The highest limit value of national regulation indoor formaldehyde concentration (GB/T 18883-2002) 0.10mg/m
3.Milligram with the reduction formula of ppm is: 1ppm=1.247mg/m
3.
Measurement result is in Table 5.
Table 5 coating provided by the invention is except effect of formaldehyde
As shown in Table 5, common coating also has certain effect of formaldehyde that removes, and the formaldehyde clearance when 24h is 8.24%; After 5d, the formaldehyde clearance reaches minimum, is 18.09%; Pass in time, remove the formaldehyde rate and do not rise counter falling, this shows, it is very limited that common coating absorbs the amount of formaldehyde, the formaldehyde of separating out in the follow-up period can not absorb interior finish, or the formaldehyde that will absorb in the past on the contrary discharges in the gas that makes the return trip empty again.The coating that the embodiment of the present invention 4 to 9 provides in the time, keeps formaldehyde clearance preferably at 24h to 90d always, is 93.48～95.97%, can effectively remove the formaldehyde discharged in interior finish.
Embodiment 15 detects the organic volatile gas removal effect of coating provided by the invention
The solution that discharges the objectionable impuritiess such as benzene, VOC is sprayed into respectively in the climate box of 7 airtight same volumes, wherein in 6 climate boxs, place the sheet glass that is coated with the coating that the embodiment of the present invention 4 to 9 makes, in the integral point time period, with benzene detector tube, VOC detector tube, detected.Or the portable benzene organic gas of TLV FALCON, the VOC organic gas PID monitor that with the U.S., produce are detected.
Test group: select 1 airtight proofing box (about 1m
3, inside is provided with ultraviolet source), be placed with the sheet glass that surface-coated has the 50cm * 50cm of the coating that in the present invention, embodiment 4 makes in proofing box.Spray into benzene, control constant temp (23 ℃ ± 2), humidity (60%), through 30min, make benzene fully volatilize and fill the air.
Control group: select airtight proofing box (the about 1m with the test group formed objects
3, inside is provided with ultraviolet source), be placed with the sheet glass of 50cm * 50cm in proofing box, do not apply the coating that in the present invention, embodiment 4 to 9 makes.Spray into benzene, control constant temp (23 ℃ ± 2), humidity (60%), through 30min, make benzene fully volatilize and fill the air.
After 24h, the air sampling with atmosphere sampling instrument to each airtight proofing box, and carry out blank determination with the absorption liquid of on-the-spot unsampled blank absorption tube.According to GB/T11737-2001 " benzene,toluene,xylene health test method in the atmosphere of residential district " test benzene in air concentration.Or detected and record with the portable benzene organic gas of U.S. TLV FALCON detector.
The detection method of VOC is approximate with benzene, and different is only the obnoxious flavour sprayed into and the instrument that detects use.Measurement result is in Table 6.
Table 6 coating provided by the invention is except organic volatile gas effect
As shown in Table 6, the coating that embodiment 4 provided by the invention makes has removal effect preferably to airborne VOC (volatile organic compounds) and obnoxious flavour as benzene etc.Clearance to VOC is 69.23%, wherein, to the clearance of benzene, is 64.38%.
The coating that embodiment 5 to 9 provided by the invention makes also has the close effect of coating made with embodiment 1, can effectively remove airborne VOC and toxic and harmful equally.Wherein, the coating that embodiment 5 to 9 makes is 68.79～73.17% to the clearance of VOC, wherein, to the clearance of benzene, is 63.14～73.06%.
Comprehensive the above results, coating provided by the invention is 68.79～73.17% to the clearance of VOC, wherein, to the clearance of benzene, is 63.14～73.06%.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. the extracting method of a Pericarpium Kaki extract, is characterized in that, comprising:
Step 1: Pericarpium Kaki dry powder is pulverized, sieves, made to Pericarpium Kaki, through 60 ℃ of oven dry 10h;
Step 2: in g/mL, in Pericarpium Kaki dry powder, according to mass volume ratio, add the aqueous acetone solution that volume fraction is 50% at 1: 12, at 45 ℃ of water-bath lucifuge lixiviate 2h, filter, obtain the first filtrate; Collect filter residue and add by mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 6 again, extract 1h, obtain the second filtrate; The first filtrate, the second filtrate are mixed, and distillation obtains concentrated solution, obtains the Pericarpium Kaki extract after lyophilize.
2. the Pericarpium Kaki extract that extracting method as claimed in claim 1 obtains.
3. Pericarpium Kaki extract as claimed in claim 2 absorbs formaldehyde in preparation, eliminates the application in stink or antibacterial paint additive.
4. a coating, is characterized in that, comprises the Pericarpium Kaki extract, acceptable auxiliary agent in emulsion, titanium dioxide, coarse whiting, calcined kaolin, talcum powder and coating; Pericarpium Kaki dry powder is pulverized, sieves, made to described Pericarpium Kaki extract through 60 ℃ of oven dry 10h,, in g/mL by Pericarpium Kaki, add according to mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 12 in Pericarpium Kaki dry powder, at 45 ℃ of water-bath lucifuge lixiviate 2h, filter, obtain the first filtrate; Collect filter residue and add by mass volume ratio the aqueous acetone solution that volume fraction is 50% at 1: 6 again, extract 1h, obtain the second filtrate; The first filtrate, the second filtrate are mixed, and distillation obtains concentrated solution, after lyophilize, makes.
5. coating as claimed in claim 4, is characterized in that, by weight percentage, contains Pericarpium Kaki extract 1～3%.
6. coating as claimed in claim 4, it is characterized in that, in described coating, acceptable auxiliary agent comprises one or more the mixture in thickening material, multifunctional assistant, wetting dispersing agent, defoamer, film coalescence aid, ethylene glycol, sanitas, mould inhibitor.
7. coating as claimed in claim 4, is characterized in that, described coating is water soluble paint.
8. coating as claimed in claim 4, it is characterized in that, by weight percentage, comprise: Pericarpium Kaki extract 1～3%, acrylate and vinyl acetate emulsion or benzene emulsion 23.5～44%, Natvosol thickening material 0.3～0.9%, AMP-95 multifunctional assistant 0.05～0.15%, wetting dispersing agent 0.3～0.6%, defoamer 0.2～0.4%, film coalescence aid 0.8～1.5%, ethylene glycol 1～1.5%, titanium dioxide 5～15%, coarse whiting 10～30%, calcined kaolin 5～15%, talcum powder 2～8%, sanitas 0.1～0.3%, mould inhibitor 0.1～0.3%.
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| CN103555299B (en) * | 2013-11-15 | 2015-09-23 | 西安石油大学 | Method for preparing environment-friendly thickening agent for oil field from persimmon peels and application of thickening agent |
| CN105568748B (en) * | 2015-12-19 | 2017-11-17 | 宁波远志立方能源科技有限公司 | White board and preparation method thereof |
| CN105542549B (en) * | 2016-01-22 | 2018-06-22 | 湖北融友生物科技有限公司 | A kind of biology formaldehyde elimination agent |
| CN105852027A (en) * | 2016-04-06 | 2016-08-17 | 安徽新珠城鱼坊餐饮管理有限公司 | Treatment liquid used before marinating of roasted fish |
| CN105795314A (en) * | 2016-04-06 | 2016-07-27 | 安徽新珠城鱼坊餐饮管理有限公司 | Treatment method for fish baking before pickling |
| CN108244145A (en) * | 2018-02-07 | 2018-07-06 | 广州市凯卫莎环保科技有限公司 | Triple effect all-weather light catalyst indoor air purification agent and preparation method and application |
| CN108144417A (en) * | 2018-03-16 | 2018-06-12 | 广州市凯卫莎环保科技有限公司 | Multiple-effect, environmentally-friendly eliminating smell agent and preparation method and application |
| CN108144097A (en) * | 2018-03-16 | 2018-06-12 | 广州市凯卫莎环保科技有限公司 | Fragrant essential oil and preparation method and application |
| CN108951257A (en) * | 2018-08-16 | 2018-12-07 | 枣庄市天龙纸业有限公司 | A kind of environmental protection low basis weight coated duplex board with grey back and preparation method thereof |
| CN110938890A (en) * | 2019-12-07 | 2020-03-31 | 杭州东南纺织有限公司 | Production method of polyester colored yarn |
| CN112972742B (en) * | 2021-02-23 | 2022-12-23 | 浙江思享家环保科技有限公司 | Environment-friendly plant composite extract for removing formaldehyde, decomposing peculiar smell and sterilizing and preparation thereof |
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